- Linux-kselftest-mirror - lists.linaro.org

by Christian Brauner

This adds the pidfd_open() syscall. It allows a caller to retrieve pollable pidfds for a process which did not get created via CLONE_PIDFD, i.e. for a process that is created via traditional fork()/clone() calls that is only referenced by a PID: int pidfd = pidfd_open(1234, 0); ret = pidfd_send_signal(pidfd, SIGSTOP, NULL, 0); With the introduction of pidfds through CLONE_PIDFD it is possible to created pidfds at process creation time. However, a lot of processes get created with traditional PID-based calls such as fork() or clone() (without CLONE_PIDFD). For these processes a caller can currently not create a pollable pidfd. This is a problem for Android's low memory killer (LMK) and service managers such as systemd. Both are examples of tools that want to make use of pidfds to get reliable notification of process exit for non-parents (pidfd polling) and race-free signal sending (pidfd_send_signal()). They intend to switch to this API for process supervision/management as soon as possible. Having no way to get pollable pidfds from PID-only processes is one of the biggest blockers for them in adopting this api. With pidfd_open() making it possible to retrieve pidfds for PID-based processes we enable them to adopt this api. In line with Arnd's recent changes to consolidate syscall numbers across architectures, I have added the pidfd_open() syscall to all architectures at the same time. Signed-off-by: Christian Brauner <christian(a)brauner.io> Reviewed-by: Oleg Nesterov <oleg(a)redhat.com> Acked-by: Arnd Bergmann <arnd(a)arndb.de> Cc: "Eric W. Biederman" <ebiederm(a)xmission.com> Cc: Kees Cook <keescook(a)chromium.org> Cc: Joel Fernandes (Google) <joel(a)joelfernandes.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Andy Lutomirsky <luto(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Aleksa Sarai <cyphar(a)cyphar.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: linux-api(a)vger.kernel.org --- v1: - kbuild test robot <lkp(a)intel.com>: - add missing entry for pidfd_open to arch/arm/tools/syscall.tbl - Oleg Nesterov <oleg(a)redhat.com>: - use simpler thread-group leader check v2: - Oleg Nesterov <oleg(a)redhat.com>: - avoid using additional variable - remove unneeded comment - Arnd Bergmann <arnd(a)arndb.de>: - switch from 428 to 434 since the new mount api has taken it - bump syscall numbers in arch/arm64/include/asm/unistd.h - Joel Fernandes (Google) <joel(a)joelfernandes.org>: - switch from ESRCH to EINVAL when the passed-in pid does not refer to a thread-group leader - Christian Brauner <christian(a)brauner.io>: - rebase on v5.2-rc1 - adapt syscall number to account for new mount api syscalls v3: - Arnd Bergmann <arnd(a)arndb.de>: - add missing syscall entries for mips-o32 and mips-n64 --- arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd.h | 2 +- arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + include/linux/pid.h | 1 + include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 4 +- kernel/fork.c | 2 +- kernel/pid.c | 43 +++++++++++++++++++++ 23 files changed, 68 insertions(+), 3 deletions(-) diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl index 9e7704e44f6d..1db9bbcfb84e 100644 --- a/arch/alpha/kernel/syscalls/syscall.tbl +++ b/arch/alpha/kernel/syscalls/syscall.tbl @@ -473,3 +473,4 @@ 541 common fsconfig sys_fsconfig 542 common fsmount sys_fsmount 543 common fspick sys_fspick +544 common pidfd_open sys_pidfd_open diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl index aaf479a9e92d..81e6e1817c45 100644 --- a/arch/arm/tools/syscall.tbl +++ b/arch/arm/tools/syscall.tbl @@ -447,3 +447,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 70e6882853c0..e8f7d95a1481 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -44,7 +44,7 @@ #define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5) #define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800) -#define __NR_compat_syscalls 434 +#define __NR_compat_syscalls 435 #endif #define __ARCH_WANT_SYS_CLONE diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index c39e90600bb3..7a3158ccd68e 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -886,6 +886,8 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_pidfd_open 434 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) /* * Please add new compat syscalls above this comment and update diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl index e01df3f2f80d..ecc44926737b 100644 --- a/arch/ia64/kernel/syscalls/syscall.tbl +++ b/arch/ia64/kernel/syscalls/syscall.tbl @@ -354,3 +354,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl index 7e3d0734b2f3..9a3eb2558568 100644 --- a/arch/m68k/kernel/syscalls/syscall.tbl +++ b/arch/m68k/kernel/syscalls/syscall.tbl @@ -433,3 +433,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 26339e417695..ad706f83c755 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -439,3 +439,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 0e2dd68ade57..97035e19ad03 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -372,3 +372,4 @@ 431 n32 fsconfig sys_fsconfig 432 n32 fsmount sys_fsmount 433 n32 fspick sys_fspick +434 n32 pidfd_open sys_pidfd_open diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl index 5eebfa0d155c..d7292722d3b0 100644 --- a/arch/mips/kernel/syscalls/syscall_n64.tbl +++ b/arch/mips/kernel/syscalls/syscall_n64.tbl @@ -348,3 +348,4 @@ 431 n64 fsconfig sys_fsconfig 432 n64 fsmount sys_fsmount 433 n64 fspick sys_fspick +434 n64 pidfd_open sys_pidfd_open diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl index 3cc1374e02d0..dba084c92f14 100644 --- a/arch/mips/kernel/syscalls/syscall_o32.tbl +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl @@ -421,3 +421,4 @@ 431 o32 fsconfig sys_fsconfig 432 o32 fsmount sys_fsmount 433 o32 fspick sys_fspick +434 o32 pidfd_open sys_pidfd_open diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index c9e377d59232..5022b9e179c2 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 103655d84b4b..f2c3bda2d39f 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -515,3 +515,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index e822b2964a83..6ebacfeaf853 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig sys_fsconfig 432 common fsmount sys_fsmount sys_fsmount 433 common fspick sys_fspick sys_fspick +434 common pidfd_open sys_pidfd_open sys_pidfd_open diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 016a727d4357..834c9c7d79fa 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index e047480b1605..c58e71f21129 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -479,3 +479,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index ad968b7bac72..43e4429a5272 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -438,3 +438,4 @@ 431 i386 fsconfig sys_fsconfig __ia32_sys_fsconfig 432 i386 fsmount sys_fsmount __ia32_sys_fsmount 433 i386 fspick sys_fspick __ia32_sys_fspick +434 i386 pidfd_open sys_pidfd_open __ia32_sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index b4e6f9e6204a..1bee0a77fdd3 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -355,6 +355,7 @@ 431 common fsconfig __x64_sys_fsconfig 432 common fsmount __x64_sys_fsmount 433 common fspick __x64_sys_fspick +434 common pidfd_open __x64_sys_pidfd_open # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl index 5fa0ee1c8e00..782b81945ccc 100644 --- a/arch/xtensa/kernel/syscalls/syscall.tbl +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -404,3 +404,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/include/linux/pid.h b/include/linux/pid.h index 3c8ef5a199ca..c938a92eab99 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -67,6 +67,7 @@ struct pid extern struct pid init_struct_pid; extern const struct file_operations pidfd_fops; +extern int pidfd_create(struct pid *pid); static inline struct pid *get_pid(struct pid *pid) { diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e2870fe1be5b..989055e0b501 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -929,6 +929,7 @@ asmlinkage long sys_clock_adjtime32(clockid_t which_clock, struct old_timex32 __user *tx); asmlinkage long sys_syncfs(int fd); asmlinkage long sys_setns(int fd, int nstype); +asmlinkage long sys_pidfd_open(pid_t pid, unsigned int flags); asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags); asmlinkage long sys_process_vm_readv(pid_t pid, diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index a87904daf103..e5684a4512c0 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -844,9 +844,11 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_pidfd_open 434 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) #undef __NR_syscalls -#define __NR_syscalls 434 +#define __NR_syscalls 435 /* * 32 bit systems traditionally used different diff --git a/kernel/fork.c b/kernel/fork.c index b4cba953040a..c3df226f47a1 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1724,7 +1724,7 @@ const struct file_operations pidfd_fops = { * Return: On success, a cloexec pidfd is returned. * On error, a negative errno number will be returned. */ -static int pidfd_create(struct pid *pid) +int pidfd_create(struct pid *pid) { int fd; diff --git a/kernel/pid.c b/kernel/pid.c index 89548d35eefb..8fc9d94f6ac1 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -37,6 +37,7 @@ #include <linux/syscalls.h> #include <linux/proc_ns.h> #include <linux/proc_fs.h> +#include <linux/sched/signal.h> #include <linux/sched/task.h> #include <linux/idr.h> @@ -450,6 +451,48 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns) return idr_get_next(&ns->idr, &nr); } +/** + * pidfd_open() - Open new pid file descriptor. + * + * @pid: pid for which to retrieve a pidfd + * @flags: flags to pass + * + * This creates a new pid file descriptor with the O_CLOEXEC flag set for + * the process identified by @pid. Currently, the process identified by + * @pid must be a thread-group leader. This restriction currently exists + * for all aspects of pidfds including pidfd creation (CLONE_PIDFD cannot + * be used with CLONE_THREAD) and pidfd polling (only supports thread group + * leaders). + * + * Return: On success, a cloexec pidfd is returned. + * On error, a negative errno number will be returned. + */ +SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) +{ + int fd, ret; + struct pid *p; + + if (flags) + return -EINVAL; + + if (pid <= 0) + return -EINVAL; + + p = find_get_pid(pid); + if (!p) + return -ESRCH; + + ret = 0; + rcu_read_lock(); + if (!pid_task(p, PIDTYPE_TGID)) + ret = -EINVAL; + rcu_read_unlock(); + + fd = ret ?: pidfd_create(p); + put_pid(p); + return fd; +} + void __init pid_idr_init(void) { /* Verify no one has done anything silly: */ -- 2.21.0

6 years, 5 months

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[PATCH AUTOSEL 4.19 31/60] bpf: lpm_trie: check left child of last leftmost node for NULL

by Sasha Levin

From: Jonathan Lemon <jonathan.lemon(a)gmail.com> [ Upstream commit da2577fdd0932ea4eefe73903f1130ee366767d2 ] If the leftmost parent node of the tree has does not have a child on the left side, then trie_get_next_key (and bpftool map dump) will not look at the child on the right. This leads to the traversal missing elements. Lookup is not affected. Update selftest to handle this case. Reproducer: bpftool map create /sys/fs/bpf/lpm type lpm_trie key 6 \ value 1 entries 256 name test_lpm flags 1 bpftool map update pinned /sys/fs/bpf/lpm key 8 0 0 0 0 0 value 1 bpftool map update pinned /sys/fs/bpf/lpm key 16 0 0 0 0 128 value 2 bpftool map dump pinned /sys/fs/bpf/lpm Returns only 1 element. (2 expected) Fixes: b471f2f1de8b ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE") Signed-off-by: Jonathan Lemon <jonathan.lemon(a)gmail.com> Acked-by: Martin KaFai Lau <kafai(a)fb.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- kernel/bpf/lpm_trie.c | 9 +++-- tools/testing/selftests/bpf/test_lpm_map.c | 41 ++++++++++++++++++++-- 2 files changed, 45 insertions(+), 5 deletions(-) diff --git a/kernel/bpf/lpm_trie.c b/kernel/bpf/lpm_trie.c index 4f3138e6ecb2..1a8b208f6c55 100644 --- a/kernel/bpf/lpm_trie.c +++ b/kernel/bpf/lpm_trie.c @@ -676,9 +676,14 @@ static int trie_get_next_key(struct bpf_map *map, void *_key, void *_next_key) * have exact two children, so this function will never return NULL. */ for (node = search_root; node;) { - if (!(node->flags & LPM_TREE_NODE_FLAG_IM)) + if (node->flags & LPM_TREE_NODE_FLAG_IM) { + node = rcu_dereference(node->child[0]); + } else { next_node = node; - node = rcu_dereference(node->child[0]); + node = rcu_dereference(node->child[0]); + if (!node) + node = rcu_dereference(next_node->child[1]); + } } do_copy: next_key->prefixlen = next_node->prefixlen; diff --git a/tools/testing/selftests/bpf/test_lpm_map.c b/tools/testing/selftests/bpf/test_lpm_map.c index 02d7c871862a..006be3963977 100644 --- a/tools/testing/selftests/bpf/test_lpm_map.c +++ b/tools/testing/selftests/bpf/test_lpm_map.c @@ -573,13 +573,13 @@ static void test_lpm_get_next_key(void) /* add one more element (total two) */ key_p->prefixlen = 24; - inet_pton(AF_INET, "192.168.0.0", key_p->data); + inet_pton(AF_INET, "192.168.128.0", key_p->data); assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0); memset(key_p, 0, key_size); assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0); assert(key_p->prefixlen == 24 && key_p->data[0] == 192 && - key_p->data[1] == 168 && key_p->data[2] == 0); + key_p->data[1] == 168 && key_p->data[2] == 128); memset(next_key_p, 0, key_size); assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); @@ -592,7 +592,7 @@ static void test_lpm_get_next_key(void) /* Add one more element (total three) */ key_p->prefixlen = 24; - inet_pton(AF_INET, "192.168.128.0", key_p->data); + inet_pton(AF_INET, "192.168.0.0", key_p->data); assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0); memset(key_p, 0, key_size); @@ -643,6 +643,41 @@ static void test_lpm_get_next_key(void) assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -1 && errno == ENOENT); + /* Add one more element (total five) */ + key_p->prefixlen = 28; + inet_pton(AF_INET, "192.168.1.128", key_p->data); + assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0); + + memset(key_p, 0, key_size); + assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0); + assert(key_p->prefixlen == 24 && key_p->data[0] == 192 && + key_p->data[1] == 168 && key_p->data[2] == 0); + + memset(next_key_p, 0, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 28 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168 && next_key_p->data[2] == 1 && + next_key_p->data[3] == 128); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168 && next_key_p->data[2] == 1); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168 && next_key_p->data[2] == 128); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 16 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -1 && + errno == ENOENT); + /* no exact matching key should return the first one in post order */ key_p->prefixlen = 22; inet_pton(AF_INET, "192.168.1.0", key_p->data); -- 2.20.1

6 years, 5 months

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[PATCH AUTOSEL 5.1 58/95] bpf: fix div64 overflow tests to properly detect errors

by Sasha Levin

From: "Naveen N. Rao" <naveen.n.rao(a)linux.vnet.ibm.com> [ Upstream commit 3e0682695199bad51dd898fe064d1564637ff77a ] If the result of the division is LLONG_MIN, current tests do not detect the error since the return value is truncated to a 32-bit value and ends up being 0. Signed-off-by: Naveen N. Rao <naveen.n.rao(a)linux.vnet.ibm.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- .../testing/selftests/bpf/verifier/div_overflow.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/verifier/div_overflow.c b/tools/testing/selftests/bpf/verifier/div_overflow.c index bd3f38dbe796..acab4f00819f 100644 --- a/tools/testing/selftests/bpf/verifier/div_overflow.c +++ b/tools/testing/selftests/bpf/verifier/div_overflow.c @@ -29,8 +29,11 @@ "DIV64 overflow, check 1", .insns = { BPF_MOV64_IMM(BPF_REG_1, -1), - BPF_LD_IMM64(BPF_REG_0, LLONG_MIN), - BPF_ALU64_REG(BPF_DIV, BPF_REG_0, BPF_REG_1), + BPF_LD_IMM64(BPF_REG_2, LLONG_MIN), + BPF_ALU64_REG(BPF_DIV, BPF_REG_2, BPF_REG_1), + BPF_MOV32_IMM(BPF_REG_0, 0), + BPF_JMP_REG(BPF_JEQ, BPF_REG_0, BPF_REG_2, 1), + BPF_MOV32_IMM(BPF_REG_0, 1), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_SCHED_CLS, @@ -40,8 +43,11 @@ { "DIV64 overflow, check 2", .insns = { - BPF_LD_IMM64(BPF_REG_0, LLONG_MIN), - BPF_ALU64_IMM(BPF_DIV, BPF_REG_0, -1), + BPF_LD_IMM64(BPF_REG_1, LLONG_MIN), + BPF_ALU64_IMM(BPF_DIV, BPF_REG_1, -1), + BPF_MOV32_IMM(BPF_REG_0, 0), + BPF_JMP_REG(BPF_JEQ, BPF_REG_0, BPF_REG_1, 1), + BPF_MOV32_IMM(BPF_REG_0, 1), BPF_EXIT_INSN(), }, .prog_type = BPF_PROG_TYPE_SCHED_CLS, -- 2.20.1

6 years, 5 months

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[PATCH AUTOSEL 5.1 48/95] bpf: lpm_trie: check left child of last leftmost node for NULL

by Sasha Levin

From: Jonathan Lemon <jonathan.lemon(a)gmail.com> [ Upstream commit da2577fdd0932ea4eefe73903f1130ee366767d2 ] If the leftmost parent node of the tree has does not have a child on the left side, then trie_get_next_key (and bpftool map dump) will not look at the child on the right. This leads to the traversal missing elements. Lookup is not affected. Update selftest to handle this case. Reproducer: bpftool map create /sys/fs/bpf/lpm type lpm_trie key 6 \ value 1 entries 256 name test_lpm flags 1 bpftool map update pinned /sys/fs/bpf/lpm key 8 0 0 0 0 0 value 1 bpftool map update pinned /sys/fs/bpf/lpm key 16 0 0 0 0 128 value 2 bpftool map dump pinned /sys/fs/bpf/lpm Returns only 1 element. (2 expected) Fixes: b471f2f1de8b ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE") Signed-off-by: Jonathan Lemon <jonathan.lemon(a)gmail.com> Acked-by: Martin KaFai Lau <kafai(a)fb.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- kernel/bpf/lpm_trie.c | 9 +++-- tools/testing/selftests/bpf/test_lpm_map.c | 41 ++++++++++++++++++++-- 2 files changed, 45 insertions(+), 5 deletions(-) diff --git a/kernel/bpf/lpm_trie.c b/kernel/bpf/lpm_trie.c index 93a5cbbde421..3b03a7342f3c 100644 --- a/kernel/bpf/lpm_trie.c +++ b/kernel/bpf/lpm_trie.c @@ -715,9 +715,14 @@ static int trie_get_next_key(struct bpf_map *map, void *_key, void *_next_key) * have exact two children, so this function will never return NULL. */ for (node = search_root; node;) { - if (!(node->flags & LPM_TREE_NODE_FLAG_IM)) + if (node->flags & LPM_TREE_NODE_FLAG_IM) { + node = rcu_dereference(node->child[0]); + } else { next_node = node; - node = rcu_dereference(node->child[0]); + node = rcu_dereference(node->child[0]); + if (!node) + node = rcu_dereference(next_node->child[1]); + } } do_copy: next_key->prefixlen = next_node->prefixlen; diff --git a/tools/testing/selftests/bpf/test_lpm_map.c b/tools/testing/selftests/bpf/test_lpm_map.c index 02d7c871862a..006be3963977 100644 --- a/tools/testing/selftests/bpf/test_lpm_map.c +++ b/tools/testing/selftests/bpf/test_lpm_map.c @@ -573,13 +573,13 @@ static void test_lpm_get_next_key(void) /* add one more element (total two) */ key_p->prefixlen = 24; - inet_pton(AF_INET, "192.168.0.0", key_p->data); + inet_pton(AF_INET, "192.168.128.0", key_p->data); assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0); memset(key_p, 0, key_size); assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0); assert(key_p->prefixlen == 24 && key_p->data[0] == 192 && - key_p->data[1] == 168 && key_p->data[2] == 0); + key_p->data[1] == 168 && key_p->data[2] == 128); memset(next_key_p, 0, key_size); assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); @@ -592,7 +592,7 @@ static void test_lpm_get_next_key(void) /* Add one more element (total three) */ key_p->prefixlen = 24; - inet_pton(AF_INET, "192.168.128.0", key_p->data); + inet_pton(AF_INET, "192.168.0.0", key_p->data); assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0); memset(key_p, 0, key_size); @@ -643,6 +643,41 @@ static void test_lpm_get_next_key(void) assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -1 && errno == ENOENT); + /* Add one more element (total five) */ + key_p->prefixlen = 28; + inet_pton(AF_INET, "192.168.1.128", key_p->data); + assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0); + + memset(key_p, 0, key_size); + assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0); + assert(key_p->prefixlen == 24 && key_p->data[0] == 192 && + key_p->data[1] == 168 && key_p->data[2] == 0); + + memset(next_key_p, 0, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 28 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168 && next_key_p->data[2] == 1 && + next_key_p->data[3] == 128); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168 && next_key_p->data[2] == 1); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168 && next_key_p->data[2] == 128); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0); + assert(next_key_p->prefixlen == 16 && next_key_p->data[0] == 192 && + next_key_p->data[1] == 168); + + memcpy(key_p, next_key_p, key_size); + assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -1 && + errno == ENOENT); + /* no exact matching key should return the first one in post order */ key_p->prefixlen = 22; inet_pton(AF_INET, "192.168.1.0", key_p->data); -- 2.20.1

6 years, 5 months

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[RFC PATCH 1/1] Revert "rseq/selftests: arm: use udf instruction for RSEQ_SIG"

by Mathieu Desnoyers

This reverts commit 2b845d4b4acd9422bbb668989db8dc36dfc8f438. That commit introduces build issues for programs compiled in Thumb mode. Rather than try to be clever and emit a valid trap instruction on arm32, which requires special care about big/little endian handling on that architecture, just emit plain data. Data in the instruction stream is technically expected on arm32: this is how literal pools are implemented. Reverting to the prior behavior does exactly that. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> CC: Peter Zijlstra <peterz(a)infradead.org> CC: Thomas Gleixner <tglx(a)linutronix.de> CC: Joel Fernandes <joelaf(a)google.com> CC: Catalin Marinas <catalin.marinas(a)arm.com> CC: Dave Watson <davejwatson(a)fb.com> CC: Will Deacon <will.deacon(a)arm.com> CC: Shuah Khan <shuah(a)kernel.org> CC: Andi Kleen <andi(a)firstfloor.org> CC: linux-kselftest(a)vger.kernel.org CC: "H . Peter Anvin" <hpa(a)zytor.com> CC: Chris Lameter <cl(a)linux.com> CC: Russell King <linux(a)arm.linux.org.uk> CC: Michael Kerrisk <mtk.manpages(a)gmail.com> CC: "Paul E . McKenney" <paulmck(a)linux.vnet.ibm.com> CC: Paul Turner <pjt(a)google.com> CC: Boqun Feng <boqun.feng(a)gmail.com> CC: Josh Triplett <josh(a)joshtriplett.org> CC: Steven Rostedt <rostedt(a)goodmis.org> CC: Ben Maurer <bmaurer(a)fb.com> CC: linux-api(a)vger.kernel.org CC: Andy Lutomirski <luto(a)amacapital.net> CC: Andrew Morton <akpm(a)linux-foundation.org> CC: Linus Torvalds <torvalds(a)linux-foundation.org> CC: Carlos O'Donell <carlos(a)redhat.com> CC: Florian Weimer <fweimer(a)redhat.com> --- tools/testing/selftests/rseq/rseq-arm.h | 52 ++------------------------------- 1 file changed, 2 insertions(+), 50 deletions(-) diff --git a/tools/testing/selftests/rseq/rseq-arm.h b/tools/testing/selftests/rseq/rseq-arm.h index 84f28f147fb6..5f262c54364f 100644 --- a/tools/testing/selftests/rseq/rseq-arm.h +++ b/tools/testing/selftests/rseq/rseq-arm.h @@ -5,54 +5,7 @@ * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> */ -/* - * RSEQ_SIG uses the udf A32 instruction with an uncommon immediate operand - * value 0x5de3. This traps if user-space reaches this instruction by mistake, - * and the uncommon operand ensures the kernel does not move the instruction - * pointer to attacker-controlled code on rseq abort. - * - * The instruction pattern in the A32 instruction set is: - * - * e7f5def3 udf #24035 ; 0x5de3 - * - * This translates to the following instruction pattern in the T16 instruction - * set: - * - * little endian: - * def3 udf #243 ; 0xf3 - * e7f5 b.n <7f5> - * - * pre-ARMv6 big endian code: - * e7f5 b.n <7f5> - * def3 udf #243 ; 0xf3 - * - * ARMv6+ -mbig-endian generates mixed endianness code vs data: little-endian - * code and big-endian data. Ensure the RSEQ_SIG data signature matches code - * endianness. Prior to ARMv6, -mbig-endian generates big-endian code and data - * (which match), so there is no need to reverse the endianness of the data - * representation of the signature. However, the choice between BE32 and BE8 - * is done by the linker, so we cannot know whether code and data endianness - * will be mixed before the linker is invoked. - */ - -#define RSEQ_SIG_CODE 0xe7f5def3 - -#ifndef __ASSEMBLER__ - -#define RSEQ_SIG_DATA \ - ({ \ - int sig; \ - asm volatile ("b 2f\n\t" \ - "1: .inst " __rseq_str(RSEQ_SIG_CODE) "\n\t" \ - "2:\n\t" \ - "ldr %[sig], 1b\n\t" \ - : [sig] "=r" (sig)); \ - sig; \ - }) - -#define RSEQ_SIG RSEQ_SIG_DATA - -#endif +#define RSEQ_SIG 0x53053053 #define rseq_smp_mb() __asm__ __volatile__ ("dmb" ::: "memory", "cc") #define rseq_smp_rmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc") @@ -125,8 +78,7 @@ do { \ __rseq_str(table_label) ":\n\t" \ ".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \ - ".arm\n\t" \ - ".inst " __rseq_str(RSEQ_SIG_CODE) "\n\t" \ + ".word " __rseq_str(RSEQ_SIG) "\n\t" \ __rseq_str(label) ":\n\t" \ teardown \ "b %l[" __rseq_str(abort_label) "]\n\t" -- 2.11.0

6 years, 5 months

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selftests: bpf: test_libbpf.sh failed at file test_l4lb.o

by Naresh Kamboju

selftests: bpf test_libbpf.sh failed running Linux -next kernel 20190618 and 20190619. Here is the log from x86_64, # selftests bpf test_libbpf.sh bpf: test_libbpf.sh_ # # [0] libbpf BTF is required, but is missing or corrupted. libbpf: BTF_is # # test_libbpf failed at file test_l4lb.o failed: at_file # # selftests test_libbpf [FAILED] test_libbpf: [FAILED]_ # [FAIL] 29 selftests bpf test_libbpf.sh selftests: bpf_test_libbpf.sh [FAIL] Full test log, https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190619/testru… Test results comparison, https://qa-reports.linaro.org/lkft/linux-next-oe/tests/kselftest/bpf_test_l… Good linux -next tag: next-20190617 Bad linux -next tag: next-20190618 git branch master git commit 1c6b40509daf5190b1fd2c758649f7df1da4827b git repo https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git Best regards Naresh Kamboju

6 years, 5 months

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Fwd: BUG: KASAN: global-out-of-bounds in ata_exec_internal_sg+0x50f/0xc70

by Jeffrin Thalakkottoor

---------- Forwarded message --------- From: Jeffrin Thalakkottoor <jeffrin(a)rajagiritech.edu.in> Date: Fri, Jun 14, 2019 at 12:06 AM Subject: BUG: KASAN: global-out-of-bounds in ata_exec_internal_sg+0x50f/0xc70 To: <axboe(a)kernel.dk>, <jejb(a)linux.ibm.com>, <martin.petersen(a)oracle.com> Cc: lkml <linux-kernel(a)vger.kernel.org>, <linux-ide(a)vger.kernel.org>, <linux-scsi(a)vger.kernel.org> hello , [ 55.169278] ================================================================== [ 55.169899] BUG: KASAN: global-out-of-bounds in ata_exec_internal_sg+0x50f/0xc70 [libata] [ 55.170039] Read of size 16 at addr ffffffffc0723500 by task scsi_eh_1/149 [ 55.186354] The buggy address belongs to the variable: [ 55.186972] cdb.48295+0x0/0xfffffffffffeab00 [libata] [ 55.187171] Memory state around the buggy address: [ 55.187290] ffffffffc0723400: 00 00 fa fa fa fa fa fa 00 00 fa fa fa fa fa fa [ 55.187417] ffffffffc0723480: 00 00 00 00 00 00 00 00 05 fa fa fa fa fa fa fa [ 55.187544] >ffffffffc0723500: 00 04 fa fa fa fa fa fa 00 00 fa fa fa fa fa fa [ 55.187686] ^ [ 55.187810] ffffffffc0723580: 00 00 05 fa fa fa fa fa 00 00 00 00 00 00 00 00 [ 55.187940] ffffffffc0723600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.188060] ================================================================== output of dmesg with the filename kasan.txt attached -- software engineer rajagiri school of engineering and technology

6 years, 5 months

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[PATCH v17 00/15] arm64: untag user pointers passed to the kernel

by Andrey Konovalov

=== Overview arm64 has a feature called Top Byte Ignore, which allows to embed pointer tags into the top byte of each pointer. Userspace programs (such as HWASan, a memory debugging tool [1]) might use this feature and pass tagged user pointers to the kernel through syscalls or other interfaces. Right now the kernel is already able to handle user faults with tagged pointers, due to these patches: 1. 81cddd65 ("arm64: traps: fix userspace cache maintenance emulation on a tagged pointer") 2. 7dcd9dd8 ("arm64: hw_breakpoint: fix watchpoint matching for tagged pointers") 3. 276e9327 ("arm64: entry: improve data abort handling of tagged pointers") This patchset extends tagged pointer support to syscall arguments. As per the proposed ABI change [3], tagged pointers are only allowed to be passed to syscalls when they point to memory ranges obtained by anonymous mmap() or sbrk() (see the patchset [3] for more details). For non-memory syscalls this is done by untaging user pointers when the kernel performs pointer checking to find out whether the pointer comes from userspace (most notably in access_ok). The untagging is done only when the pointer is being checked, the tag is preserved as the pointer makes its way through the kernel and stays tagged when the kernel dereferences the pointer when perfoming user memory accesses. The mmap and mremap (only new_addr) syscalls do not currently accept tagged addresses. Architectures may interpret the tag as a background colour for the corresponding vma. Other memory syscalls (mprotect, etc.) don't do user memory accesses but rather deal with memory ranges, and untagged pointers are better suited to describe memory ranges internally. Thus for memory syscalls we untag pointers completely when they enter the kernel. === Other approaches One of the alternative approaches to untagging that was considered is to completely strip the pointer tag as the pointer enters the kernel with some kind of a syscall wrapper, but that won't work with the countless number of different ioctl calls. With this approach we would need a custom wrapper for each ioctl variation, which doesn't seem practical. An alternative approach to untagging pointers in memory syscalls prologues is to inspead allow tagged pointers to be passed to find_vma() (and other vma related functions) and untag them there. Unfortunately, a lot of find_vma() callers then compare or subtract the returned vma start and end fields against the pointer that was being searched. Thus this approach would still require changing all find_vma() callers. === Testing The following testing approaches has been taken to find potential issues with user pointer untagging: 1. Static testing (with sparse [2] and separately with a custom static analyzer based on Clang) to track casts of __user pointers to integer types to find places where untagging needs to be done. 2. Static testing with grep to find parts of the kernel that call find_vma() (and other similar functions) or directly compare against vm_start/vm_end fields of vma. 3. Static testing with grep to find parts of the kernel that compare user pointers with TASK_SIZE or other similar consts and macros. 4. Dynamic testing: adding BUG_ON(has_tag(addr)) to find_vma() and running a modified syzkaller version that passes tagged pointers to the kernel. Based on the results of the testing the requried patches have been added to the patchset. === Notes This patchset is meant to be merged together with "arm64 relaxed ABI" [3]. This patchset is a prerequisite for ARM's memory tagging hardware feature support [4]. This patchset has been merged into the Pixel 2 & 3 kernel trees and is now being used to enable testing of Pixel phones with HWASan. Thanks! [1] http://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html [2] https://github.com/lucvoo/sparse-dev/commit/5f960cb10f56ec2017c128ef9d16060… [3] https://lkml.org/lkml/2019/3/18/819 [4] https://community.arm.com/processors/b/blog/posts/arm-a-profile-architectur… === History Changes in v17: - The "uaccess: add noop untagged_addr definition" patch is dropped, as it was merged into upstream named as "uaccess: add noop untagged_addr definition". - Merged "mm, arm64: untag user pointers in do_pages_move" into "mm, arm64: untag user pointers passed to memory syscalls". - Added "arm64: Introduce prctl() options to control the tagged user addresses ABI" patch from Catalin. - Add tags_lib.so to tools/testing/selftests/arm64/.gitignore. - Added a comment clarifying untagged in mremap. - Moved untagging back into mlx4_get_umem_mr() for the IB patch. Changes in v16: - Moved untagging for memory syscalls from arm64 wrappers back to generic code. - Dropped untagging for the following memory syscalls: brk, mmap, munmap; mremap (only dropped for new_address); mmap_pgoff (not used on arm64); remap_file_pages (deprecated); shmat, shmdt (work on shared memory). - Changed kselftest to LD_PRELOAD a shared library that overrides malloc to return tagged pointers. - Rebased onto 5.2-rc3. Changes in v15: - Removed unnecessary untagging from radeon_ttm_tt_set_userptr(). - Removed unnecessary untagging from amdgpu_ttm_tt_set_userptr(). - Moved untagging to validate_range() in userfaultfd code. - Moved untagging to ib_uverbs_(re)reg_mr() from mlx4_get_umem_mr(). - Rebased onto 5.1. Changes in v14: - Moved untagging for most memory syscalls to an arm64 specific implementation, instead of doing that in the common code. - Dropped "net, arm64: untag user pointers in tcp_zerocopy_receive", since the provided user pointers don't come from an anonymous map and thus are not covered by this ABI relaxation. - Dropped "kernel, arm64: untag user pointers in prctl_set_mm*". - Moved untagging from __check_mem_type() to tee_shm_register(). - Updated untagging for the amdgpu and radeon drivers to cover the MMU notifier, as suggested by Felix. - Since this ABI relaxation doesn't actually allow tagged instruction pointers, dropped the following patches: - Dropped "tracing, arm64: untag user pointers in seq_print_user_ip". - Dropped "uprobes, arm64: untag user pointers in find_active_uprobe". - Dropped "bpf, arm64: untag user pointers in stack_map_get_build_id_offset". - Rebased onto 5.1-rc7 (37624b58). Changes in v13: - Simplified untagging in tcp_zerocopy_receive(). - Looked at find_vma() callers in drivers/, which allowed to identify a few other places where untagging is needed. - Added patch "mm, arm64: untag user pointers in get_vaddr_frames". - Added patch "drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages". - Added patch "drm/radeon, arm64: untag user pointers in radeon_ttm_tt_pin_userptr". - Added patch "IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr". - Added patch "media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get". - Added patch "tee/optee, arm64: untag user pointers in check_mem_type". - Added patch "vfio/type1, arm64: untag user pointers". Changes in v12: - Changed untagging in tcp_zerocopy_receive() to also untag zc->address. - Fixed untagging in prctl_set_mm* to only untag pointers for vma lookups and validity checks, but leave them as is for actual user space accesses. - Updated the link to the v2 of the "arm64 relaxed ABI" patchset [3]. - Dropped the documentation patch, as the "arm64 relaxed ABI" patchset [3] handles that. Changes in v11: - Added "uprobes, arm64: untag user pointers in find_active_uprobe" patch. - Added "bpf, arm64: untag user pointers in stack_map_get_build_id_offset" patch. - Fixed "tracing, arm64: untag user pointers in seq_print_user_ip" to correctly perform subtration with a tagged addr. - Moved untagged_addr() from SYSCALL_DEFINE3(mprotect) and SYSCALL_DEFINE4(pkey_mprotect) to do_mprotect_pkey(). - Moved untagged_addr() definition for other arches from include/linux/memory.h to include/linux/mm.h. - Changed untagging in strn*_user() to perform userspace accesses through tagged pointers. - Updated the documentation to mention that passing tagged pointers to memory syscalls is allowed. - Updated the test to use malloc'ed memory instead of stack memory. Changes in v10: - Added "mm, arm64: untag user pointers passed to memory syscalls" back. - New patch "fs, arm64: untag user pointers in fs/userfaultfd.c". - New patch "net, arm64: untag user pointers in tcp_zerocopy_receive". - New patch "kernel, arm64: untag user pointers in prctl_set_mm*". - New patch "tracing, arm64: untag user pointers in seq_print_user_ip". Changes in v9: - Rebased onto 4.20-rc6. - Used u64 instead of __u64 in type casts in the untagged_addr macro for arm64. - Added braces around (addr) in the untagged_addr macro for other arches. Changes in v8: - Rebased onto 65102238 (4.20-rc1). - Added a note to the cover letter on why syscall wrappers/shims that untag user pointers won't work. - Added a note to the cover letter that this patchset has been merged into the Pixel 2 kernel tree. - Documentation fixes, in particular added a list of syscalls that don't support tagged user pointers. Changes in v7: - Rebased onto 17b57b18 (4.19-rc6). - Dropped the "arm64: untag user address in __do_user_fault" patch, since the existing patches already handle user faults properly. - Dropped the "usb, arm64: untag user addresses in devio" patch, since the passed pointer must come from a vma and therefore be untagged. - Dropped the "arm64: annotate user pointers casts detected by sparse" patch (see the discussion to the replies of the v6 of this patchset). - Added more context to the cover letter. - Updated Documentation/arm64/tagged-pointers.txt. Changes in v6: - Added annotations for user pointer casts found by sparse. - Rebased onto 050cdc6c (4.19-rc1+). Changes in v5: - Added 3 new patches that add untagging to places found with static analysis. - Rebased onto 44c929e1 (4.18-rc8). Changes in v4: - Added a selftest for checking that passing tagged pointers to the kernel succeeds. - Rebased onto 81e97f013 (4.18-rc1+). Changes in v3: - Rebased onto e5c51f30 (4.17-rc6+). - Added linux-arch@ to the list of recipients. Changes in v2: - Rebased onto 2d618bdf (4.17-rc3+). - Removed excessive untagging in gup.c. - Removed untagging pointers returned from __uaccess_mask_ptr. Changes in v1: - Rebased onto 4.17-rc1. Changes in RFC v2: - Added "#ifndef untagged_addr..." fallback in linux/uaccess.h instead of defining it for each arch individually. - Updated Documentation/arm64/tagged-pointers.txt. - Dropped "mm, arm64: untag user addresses in memory syscalls". - Rebased onto 3eb2ce82 (4.16-rc7). Signed-off-by: Andrey Konovalov <andreyknvl(a)google.com> Andrey Konovalov (14): arm64: untag user pointers in access_ok and __uaccess_mask_ptr lib, arm64: untag user pointers in strn*_user mm, arm64: untag user pointers passed to memory syscalls mm, arm64: untag user pointers in mm/gup.c mm, arm64: untag user pointers in get_vaddr_frames fs, arm64: untag user pointers in copy_mount_options userfaultfd, arm64: untag user pointers drm/amdgpu, arm64: untag user pointers drm/radeon, arm64: untag user pointers in radeon_gem_userptr_ioctl IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get tee/shm, arm64: untag user pointers in tee_shm_register vfio/type1, arm64: untag user pointers in vaddr_get_pfn selftests, arm64: add a selftest for passing tagged pointers to kernel Catalin Marinas (1): arm64: Introduce prctl() options to control the tagged user addresses ABI arch/arm64/include/asm/processor.h | 6 ++ arch/arm64/include/asm/thread_info.h | 1 + arch/arm64/include/asm/uaccess.h | 11 ++- arch/arm64/kernel/process.c | 67 +++++++++++++++++++ .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 + drivers/gpu/drm/radeon/radeon_gem.c | 2 + drivers/infiniband/hw/mlx4/mr.c | 7 +- drivers/media/v4l2-core/videobuf-dma-contig.c | 9 +-- drivers/tee/tee_shm.c | 1 + drivers/vfio/vfio_iommu_type1.c | 2 + fs/namespace.c | 2 +- fs/userfaultfd.c | 22 +++--- include/uapi/linux/prctl.h | 5 ++ kernel/sys.c | 16 +++++ lib/strncpy_from_user.c | 3 +- lib/strnlen_user.c | 3 +- mm/frame_vector.c | 2 + mm/gup.c | 4 ++ mm/madvise.c | 2 + mm/mempolicy.c | 3 + mm/migrate.c | 2 +- mm/mincore.c | 2 + mm/mlock.c | 4 ++ mm/mprotect.c | 2 + mm/mremap.c | 7 ++ mm/msync.c | 2 + tools/testing/selftests/arm64/.gitignore | 2 + tools/testing/selftests/arm64/Makefile | 22 ++++++ .../testing/selftests/arm64/run_tags_test.sh | 12 ++++ tools/testing/selftests/arm64/tags_lib.c | 62 +++++++++++++++++ tools/testing/selftests/arm64/tags_test.c | 18 +++++ 32 files changed, 282 insertions(+), 25 deletions(-) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_lib.c create mode 100644 tools/testing/selftests/arm64/tags_test.c -- 2.22.0.rc2.383.gf4fbbf30c2-goog

6 years, 5 months

10
75
0 0

[PATCH 4.19 47/90] kselftest/cgroup: fix incorrect test_core skip

by Greg Kroah-Hartman

[ Upstream commit f97f3f8839eb9de5843066d80819884f7722c8c5 ] The test_core will skip the test_cgcore_no_internal_process_constraint_on_threads test case if the 'cpu' controller missing in root's subtree_control. In fact we need to set the 'cpu' in subtree_control, to make the testing meaningful. ./test_core ... ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads ... Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index d78f1c5366d3..79053a4f4783 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -198,7 +198,7 @@ static int test_cgcore_no_internal_process_constraint_on_threads(const char *roo char *parent = NULL, *child = NULL; if (cg_read_strstr(root, "cgroup.controllers", "cpu") || - cg_read_strstr(root, "cgroup.subtree_control", "cpu")) { + cg_write(root, "cgroup.subtree_control", "+cpu")) { ret = KSFT_SKIP; goto cleanup; } -- 2.20.1

6 years, 5 months

1
0
0 0

[PATCH 4.19 46/90] kselftest/cgroup: fix unexpected testing failure on test_core

by Greg Kroah-Hartman

[ Upstream commit 00e38a5d753d7788852f81703db804a60a84c26e ] The cgroup testing relys on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, some test cases will be failed as following: $sudo ./test_core not ok 1 test_cgcore_internal_process_constraint ok 2 test_cgcore_top_down_constraint_enable not ok 3 test_cgcore_top_down_constraint_disable ... To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index be59f9c34ea2..d78f1c5366d3 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -376,6 +376,11 @@ int main(int argc, char *argv[]) if (cg_find_unified_root(root, sizeof(root))) ksft_exit_skip("cgroup v2 isn't mounted\n"); + + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 5 months

1
0
0 0

[PATCH 4.19 45/90] kselftest/cgroup: fix unexpected testing failure on test_memcontrol

by Greg Kroah-Hartman

[ Upstream commit f6131f28057d4fd8922599339e701a2504e0f23d ] The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..c19a97dd02d4 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 5 months

1
0
0 0

[PATCH 5.1 059/121] kselftest/cgroup: fix incorrect test_core skip

by Greg Kroah-Hartman

[ Upstream commit f97f3f8839eb9de5843066d80819884f7722c8c5 ] The test_core will skip the test_cgcore_no_internal_process_constraint_on_threads test case if the 'cpu' controller missing in root's subtree_control. In fact we need to set the 'cpu' in subtree_control, to make the testing meaningful. ./test_core ... ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads ... Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index d78f1c5366d3..79053a4f4783 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -198,7 +198,7 @@ static int test_cgcore_no_internal_process_constraint_on_threads(const char *roo char *parent = NULL, *child = NULL; if (cg_read_strstr(root, "cgroup.controllers", "cpu") || - cg_read_strstr(root, "cgroup.subtree_control", "cpu")) { + cg_write(root, "cgroup.subtree_control", "+cpu")) { ret = KSFT_SKIP; goto cleanup; } -- 2.20.1

6 years, 5 months

1
0
0 0

[PATCH 5.1 058/121] kselftest/cgroup: fix unexpected testing failure on test_core

by Greg Kroah-Hartman

[ Upstream commit 00e38a5d753d7788852f81703db804a60a84c26e ] The cgroup testing relys on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, some test cases will be failed as following: $sudo ./test_core not ok 1 test_cgcore_internal_process_constraint ok 2 test_cgcore_top_down_constraint_enable not ok 3 test_cgcore_top_down_constraint_disable ... To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index be59f9c34ea2..d78f1c5366d3 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -376,6 +376,11 @@ int main(int argc, char *argv[]) if (cg_find_unified_root(root, sizeof(root))) ksft_exit_skip("cgroup v2 isn't mounted\n"); + + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 5 months

1
0
0 0

[PATCH 5.1 057/121] kselftest/cgroup: fix unexpected testing failure on test_memcontrol

by Greg Kroah-Hartman

[ Upstream commit f6131f28057d4fd8922599339e701a2504e0f23d ] The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..c19a97dd02d4 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 5 months

1
0
0 0

[PATCH] selftests/tpm2: Install run-time Python modules

by Daniel Díaz

When ordinarily running the tests, upon `make install', the following error is encountered: ImportError: No module named tpm2_tests because the Python files are not installed at the moment. Fix this by adding both Python modules as accompanying TEST_FILES in the Makefile. Signed-off-by: Daniel Díaz <daniel.diaz(a)linaro.org> --- tools/testing/selftests/tpm2/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/tpm2/Makefile b/tools/testing/selftests/tpm2/Makefile index 9dd848427a7b..bf401f725eef 100644 --- a/tools/testing/selftests/tpm2/Makefile +++ b/tools/testing/selftests/tpm2/Makefile @@ -2,3 +2,4 @@ include ../lib.mk TEST_PROGS := test_smoke.sh test_space.sh +TEST_FILES := tpm2.py tpm2_tests.py -- 2.20.1

6 years, 5 months

2
1
0 0

[PATCH v2.5 0/3] firmware: Add support for loading compressed files

by Takashi Iwai

[resubmitted with the missing patch] Hi, here are the rest and the main part of patches to add the support for loading the compressed firmware files. The patch was slightly refactored for more easily enhancing for other compression formats (if anyone wants). Also the selftest patch is included. The functionality doesn't change from the previous patchset. thanks, Takashi === Takashi Iwai (3): firmware: Factor out the paged buffer handling code firmware: Add support for loading compressed files selftests: firmware: Add compressed firmware tests drivers/base/firmware_loader/Kconfig | 18 ++ drivers/base/firmware_loader/fallback.c | 61 +------ drivers/base/firmware_loader/firmware.h | 12 +- drivers/base/firmware_loader/main.c | 199 +++++++++++++++++++++- tools/testing/selftests/firmware/fw_filesystem.sh | 73 ++++++-- tools/testing/selftests/firmware/fw_lib.sh | 7 + tools/testing/selftests/firmware/fw_run_tests.sh | 1 + 7 files changed, 295 insertions(+), 76 deletions(-) -- 2.16.4

6 years, 5 months

3
8
0 0

[PATCH net-next] selftests/net: make udpgso_bench skip unsupported testcases

by Willem de Bruijn

From: Willem de Bruijn <willemb(a)google.com> Kselftest can be run against older kernels. Instead of failing hard when a feature is unsupported, return the KSFT_SKIP exit code. Specifically, do not fail hard on missing udp zerocopy. The udp gso bench test runs multiple test cases from a single script. Fail if any case fails, else return skip if any test is skipped. Link: https://lore.kernel.org/lkml/20190618171516.GA17547@kroah.com/ Signed-off-by: Willem de Bruijn <willemb(a)google.com> --- tools/testing/selftests/net/udpgso_bench.sh | 75 +++++++++++-------- tools/testing/selftests/net/udpgso_bench_tx.c | 18 ++++- 2 files changed, 59 insertions(+), 34 deletions(-) diff --git a/tools/testing/selftests/net/udpgso_bench.sh b/tools/testing/selftests/net/udpgso_bench.sh index 4df1cd8d69d2..80b5d352702e 100755 --- a/tools/testing/selftests/net/udpgso_bench.sh +++ b/tools/testing/selftests/net/udpgso_bench.sh @@ -3,9 +3,47 @@ # # Run a series of udpgso benchmarks -GREEN='\033[0;92m' -RED='\033[0;31m' -NC='\033[0m' # No Color +readonly GREEN='\033[0;92m' +readonly YELLOW='\033[0;33m' +readonly RED='\033[0;31m' +readonly NC='\033[0m' # No Color + +readonly KSFT_PASS=0 +readonly KSFT_FAIL=1 +readonly KSFT_SKIP=4 + +num_pass=0 +num_err=0 +num_skip=0 + +kselftest_test_exitcode() { + local -r exitcode=$1 + + if [[ ${exitcode} -eq ${KSFT_PASS} ]]; then + num_pass=$(( $num_pass + 1 )) + elif [[ ${exitcode} -eq ${KSFT_SKIP} ]]; then + num_skip=$(( $num_skip + 1 )) + else + num_err=$(( $num_err + 1 )) + fi +} + +kselftest_exit() { + echo -e "$(basename $0): PASS=${num_pass} SKIP=${num_skip} FAIL=${num_err}" + + if [[ $num_err -ne 0 ]]; then + echo -e "$(basename $0): ${RED}FAIL${NC}" + exit ${KSFT_FAIL} + fi + + if [[ $num_skip -ne 0 ]]; then + echo -e "$(basename $0): ${YELLOW}SKIP${NC}" + exit ${KSFT_SKIP} + fi + + echo -e "$(basename $0): ${GREEN}PASS${NC}" + exit ${KSFT_PASS} +} wake_children() { local -r jobs="$(jobs -p)" @@ -29,93 +67,66 @@ run_in_netns() { local -r args=$@ ./in_netns.sh $0 __subprocess ${args} + kselftest_test_exitcode $? } run_udp() { local -r args=$@ - local errors=0 echo "udp" run_in_netns ${args} - errors=$(( $errors + $? )) echo "udp gso" run_in_netns ${args} -S 0 - errors=$(( $errors + $? )) echo "udp gso zerocopy" run_in_netns ${args} -S 0 -z - errors=$(( $errors + $? )) echo "udp gso timestamp" run_in_netns ${args} -S 0 -T - errors=$(( $errors + $? )) echo "udp gso zerocopy audit" run_in_netns ${args} -S 0 -z -a - errors=$(( $errors + $? )) echo "udp gso timestamp audit" run_in_netns ${args} -S 0 -T -a - errors=$(( $errors + $? )) echo "udp gso zerocopy timestamp audit" run_in_netns ${args} -S 0 -T -z -a - errors=$(( $errors + $? )) - - return $errors } run_tcp() { local -r args=$@ - local errors=0 echo "tcp" run_in_netns ${args} -t - errors=$(( $errors + $? )) echo "tcp zerocopy" run_in_netns ${args} -t -z - errors=$(( $errors + $? )) # excluding for now because test fails intermittently # add -P option to include poll() to reduce possibility of lost messages #echo "tcp zerocopy audit" #run_in_netns ${args} -t -z -P -a - #errors=$(( $errors + $? )) - - return $errors } run_all() { local -r core_args="-l 3" local -r ipv4_args="${core_args} -4 -D 127.0.0.1" local -r ipv6_args="${core_args} -6 -D ::1" - local errors=0 echo "ipv4" run_tcp "${ipv4_args}" - errors=$(( $errors + $? )) run_udp "${ipv4_args}" - errors=$(( $errors + $? )) echo "ipv6" run_tcp "${ipv4_args}" - errors=$(( $errors + $? )) run_udp "${ipv6_args}" - errors=$(( $errors + $? )) - - return $errors } if [[ $# -eq 0 ]]; then run_all - if [ $? -ne 0 ]; then - echo -e "$(basename $0): ${RED}FAIL${NC}" - exit 1 - fi - - echo -e "$(basename $0): ${GREEN}PASS${NC}" + kselftest_exit elif [[ $1 == "__subprocess" ]]; then shift run_one $@ diff --git a/tools/testing/selftests/net/udpgso_bench_tx.c b/tools/testing/selftests/net/udpgso_bench_tx.c index dfa83ad57206..ada99496634a 100644 --- a/tools/testing/selftests/net/udpgso_bench_tx.c +++ b/tools/testing/selftests/net/udpgso_bench_tx.c @@ -25,6 +25,8 @@ #include <sys/types.h> #include <unistd.h> +#include "../kselftest.h" + #ifndef ETH_MAX_MTU #define ETH_MAX_MTU 0xFFFFU #endif @@ -45,6 +47,10 @@ #define MSG_ZEROCOPY 0x4000000 #endif +#ifndef ENOTSUPP +#define ENOTSUPP 524 +#endif + #define NUM_PKT 100 static bool cfg_cache_trash; @@ -603,7 +609,7 @@ int main(int argc, char **argv) { unsigned long num_msgs, num_sends; unsigned long tnow, treport, tstop; - int fd, i, val; + int fd, i, val, ret; parse_opts(argc, argv); @@ -623,8 +629,16 @@ int main(int argc, char **argv) if (cfg_zerocopy) { val = 1; - if (setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, &val, sizeof(val))) + + ret = setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, + &val, sizeof(val)); + if (ret) { + if (errno == ENOPROTOOPT || errno == ENOTSUPP) { + fprintf(stderr, "SO_ZEROCOPY not supported"); + exit(KSFT_SKIP); + } error(1, errno, "setsockopt zerocopy"); + } } if (cfg_connected && -- 2.22.0.410.gd8fdbe21b5-goog

6 years, 5 months

2
1
0 0

4.19: udpgso_bench_tx: setsockopt zerocopy: Unknown error 524

by Naresh Kamboju

selftests: net: udpgso_bench.sh failed on 4.19, 4.14, 4.9 and 4.4 branches. PASS on stable branch 5.1, mainline and next. This failure is started happening on 4.19 and older kernel branches after kselftest upgrade to version 5.1 Is there any possibilities to backport ? Error: udpgso_bench_tx: setsockopt zerocopy: Unknown error 524 Test output: ----------------- selftests: net: udpgso_bench.sh ipv4 tcp tcp rx: 469 MB/s 7930 calls/s tcp tx: 469 MB/s 7961 calls/s 7961 msg/s tcp rx: 470 MB/s 7941 calls/s tcp tx: 470 MB/s 7977 calls/s 7977 msg/s tcp rx: 470 MB/s 7933 calls/s tcp tx: 470 MB/s 7975 calls/s 7975 msg/s tcp zerocopy tcp tx: 357 MB/s 6064 calls/s 6064 msg/s tcp rx: 357 MB/s 6052 calls/s tcp tx: 352 MB/s 5981 calls/s 5981 msg/s tcp rx: 352 MB/s 5979 calls/s tcp tx: 350 MB/s 5937 calls/s 5937 msg/s tcp rx: 350 MB/s 5938 calls/s udp udp rx: 23 MB/s 16505 calls/s udp tx: 23 MB/s 16464 calls/s 392 msg/s udp rx: 23 MB/s 16500 calls/s udp tx: 23 MB/s 16506 calls/s 393 msg/s udp rx: 23 MB/s 16396 calls/s udp gso udp rx: 536 MB/s 9097 calls/s udp tx: 545 MB/s 9246 calls/s 9246 msg/s udp rx: 545 MB/s 9256 calls/s udp tx: 545 MB/s 9256 calls/s 9256 msg/s udp rx: 545 MB/s 9259 calls/s udp tx: 545 MB/s 9258 calls/s 9258 msg/s udp rx: 545 MB/s 9252 calls/s udp gso zerocopy ./udpgso_bench_tx: setsockopt zerocopy: Unknown error 524 ipv6 tcp tcp tx: 470 MB/s 7979 calls/s 7979 msg/s tcp rx: 470 MB/s 7947 calls/s tcp rx: 471 MB/s 7979 calls/s tcp tx: 514 MB/s 8721 calls/s 8721 msg/s tcp zerocopy tcp tx: 392 MB/s 6658 calls/s 6658 msg/s tcp rx: 392 MB/s 6399 calls/s tcp rx: 350 MB/s 5936 calls/s tcp tx: 350 MB/s 5945 calls/s 5945 msg/s tcp rx: 350 MB/s 5937 calls/s tcp tx: 350 MB/s 5940 calls/s 5940 msg/s udp udp rx: 20 MB/s 14802 calls/s udp tx: 20 MB/s 14921 calls/s 347 msg/s udp rx: 24 MB/s 17797 calls/s udp tx: 24 MB/s 17802 calls/s 414 msg/s udp rx: 17 MB/s 12453 calls/s udp tx: 17 MB/s 12470 calls/s 290 msg/s udp rx: 17 MB/s 12409 calls/s udp tx: 545 MB/s 9257 calls/s 9257 msg/s udp rx: 545 MB/s 9249 calls/s udp tx: 545 MB/s 9248 calls/s 9248 msg/s udp rx: 545 MB/s 9254 calls/s udp tx: 545 MB/s 9254 calls/s 9254 msg/s udp rx: 545 MB/s 9260 calls/s udp gso zerocopy ./udpgso_bench_tx: setsockopt zerocopy: Unknown error 524 not ok 1.. selftests: net: udpgso_bench.sh [FAIL] selftests: net_udpgso_bench.sh [FAIL] Best regards Naresh Kamboju

6 years, 6 months

4
12
0 0

[PATCH v1 06/22] docs: blockdev: convert to ReST

by Mauro Carvalho Chehab

Rename the blockdev documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. The drbd sub-directory contains some graphs and data flows. Add those too to the documentation. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung(a)kernel.org> --- .../admin-guide/kernel-parameters.txt | 18 +- ...structure-v9.txt => data-structure-v9.rst} | 6 +- Documentation/blockdev/drbd/figures.rst | 28 +++ .../blockdev/drbd/{README.txt => index.rst} | 15 +- .../blockdev/{floppy.txt => floppy.rst} | 88 ++++---- Documentation/blockdev/index.rst | 16 ++ Documentation/blockdev/{nbd.txt => nbd.rst} | 2 +- .../blockdev/{paride.txt => paride.rst} | 194 +++++++++-------- .../blockdev/{ramdisk.txt => ramdisk.rst} | 55 ++--- Documentation/blockdev/{zram.txt => zram.rst} | 195 ++++++++++++------ MAINTAINERS | 8 +- drivers/block/Kconfig | 8 +- drivers/block/floppy.c | 2 +- drivers/block/zram/Kconfig | 6 +- tools/testing/selftests/zram/README | 2 +- 15 files changed, 398 insertions(+), 245 deletions(-) rename Documentation/blockdev/drbd/{data-structure-v9.txt => data-structure-v9.rst} (94%) create mode 100644 Documentation/blockdev/drbd/figures.rst rename Documentation/blockdev/drbd/{README.txt => index.rst} (55%) rename Documentation/blockdev/{floppy.txt => floppy.rst} (81%) create mode 100644 Documentation/blockdev/index.rst rename Documentation/blockdev/{nbd.txt => nbd.rst} (96%) rename Documentation/blockdev/{paride.txt => paride.rst} (81%) rename Documentation/blockdev/{ramdisk.txt => ramdisk.rst} (84%) rename Documentation/blockdev/{zram.txt => zram.rst} (76%) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 873062810484..20780fbc948d 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1249,7 +1249,7 @@ See also Documentation/fault-injection/. floppy= [HW] - See Documentation/blockdev/floppy.txt. + See Documentation/blockdev/floppy.rst. force_pal_cache_flush [IA-64] Avoid check_sal_cache_flush which may hang on @@ -2238,7 +2238,7 @@ memblock=debug [KNL] Enable memblock debug messages. load_ramdisk= [RAM] List of ramdisks to load from floppy - See Documentation/blockdev/ramdisk.txt. + See Documentation/blockdev/ramdisk.rst. lockd.nlm_grace_period=P [NFS] Assign grace period. Format: <integer> @@ -3283,7 +3283,7 @@ pcd. [PARIDE] See header of drivers/block/paride/pcd.c. - See also Documentation/blockdev/paride.txt. + See also Documentation/blockdev/paride.rst. pci=option[,option...] [PCI] various PCI subsystem options. @@ -3527,7 +3527,7 @@ needed on a platform with proper driver support. pd. [PARIDE] - See Documentation/blockdev/paride.txt. + See Documentation/blockdev/paride.rst. pdcchassis= [PARISC,HW] Disable/Enable PDC Chassis Status codes at boot time. @@ -3542,10 +3542,10 @@ and performance comparison. pf. [PARIDE] - See Documentation/blockdev/paride.txt. + See Documentation/blockdev/paride.rst. pg. [PARIDE] - See Documentation/blockdev/paride.txt. + See Documentation/blockdev/paride.rst. pirq= [SMP,APIC] Manual mp-table setup See Documentation/x86/i386/IO-APIC.rst. @@ -3657,7 +3657,7 @@ prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk before loading. - See Documentation/blockdev/ramdisk.txt. + See Documentation/blockdev/ramdisk.rst. psi= [KNL] Enable or disable pressure stall information tracking. @@ -3679,7 +3679,7 @@ pstore.backend= Specify the name of the pstore backend to use pt. [PARIDE] - See Documentation/blockdev/paride.txt. + See Documentation/blockdev/paride.rst. pti= [X86_64] Control Page Table Isolation of user and kernel address spaces. Disabling this feature @@ -3708,7 +3708,7 @@ See Documentation/admin-guide/md.rst. ramdisk_size= [RAM] Sizes of RAM disks in kilobytes - See Documentation/blockdev/ramdisk.txt. + See Documentation/blockdev/ramdisk.rst. random.trust_cpu={on,off} [KNL] Enable or disable trusting the use of the diff --git a/Documentation/blockdev/drbd/data-structure-v9.txt b/Documentation/blockdev/drbd/data-structure-v9.rst similarity index 94% rename from Documentation/blockdev/drbd/data-structure-v9.txt rename to Documentation/blockdev/drbd/data-structure-v9.rst index 1e52a0e32624..66036b901644 100644 --- a/Documentation/blockdev/drbd/data-structure-v9.txt +++ b/Documentation/blockdev/drbd/data-structure-v9.rst @@ -1,3 +1,7 @@ +================================ +kernel data structure for DRBD-9 +================================ + This describes the in kernel data structure for DRBD-9. Starting with Linux v3.14 we are reorganizing DRBD to use this data structure. @@ -10,7 +14,7 @@ device is represented by a block device locally. The DRBD objects are interconnected to form a matrix as depicted below; a drbd_peer_device object sits at each intersection between a drbd_device and a -drbd_connection: +drbd_connection:: /--------------+---------------+.....+---------------\ | resource | device | | device | diff --git a/Documentation/blockdev/drbd/figures.rst b/Documentation/blockdev/drbd/figures.rst new file mode 100644 index 000000000000..3e3fd4b8a478 --- /dev/null +++ b/Documentation/blockdev/drbd/figures.rst @@ -0,0 +1,28 @@ +.. The here included files are intended to help understand the implementation + +Data flows that Relate some functions, and write packets +======================================================== + +.. kernel-figure:: DRBD-8.3-data-packets.svg + :alt: DRBD-8.3-data-packets.svg + :align: center + +.. kernel-figure:: DRBD-data-packets.svg + :alt: DRBD-data-packets.svg + :align: center + + +Sub graphs of DRBD's state transitions +====================================== + +.. kernel-figure:: conn-states-8.dot + :alt: conn-states-8.dot + :align: center + +.. kernel-figure:: disk-states-8.dot + :alt: disk-states-8.dot + :align: center + +.. kernel-figure:: node-states-8.dot + :alt: node-states-8.dot + :align: center diff --git a/Documentation/blockdev/drbd/README.txt b/Documentation/blockdev/drbd/index.rst similarity index 55% rename from Documentation/blockdev/drbd/README.txt rename to Documentation/blockdev/drbd/index.rst index 627b0a1bf35e..68ecd5c113e9 100644 --- a/Documentation/blockdev/drbd/README.txt +++ b/Documentation/blockdev/drbd/index.rst @@ -1,4 +1,9 @@ +========================================== +Distributed Replicated Block Device - DRBD +========================================== + Description +=========== DRBD is a shared-nothing, synchronously replicated block device. It is designed to serve as a building block for high availability @@ -7,10 +12,8 @@ Description Please visit http://www.drbd.org to find out more. -The here included files are intended to help understand the implementation +.. toctree:: + :maxdepth: 1 -DRBD-8.3-data-packets.svg, DRBD-data-packets.svg - relates some functions, and write packets. - -conn-states-8.dot, disk-states-8.dot, node-states-8.dot - The sub graphs of DRBD's state transitions + data-structure-v9 + figures diff --git a/Documentation/blockdev/floppy.txt b/Documentation/blockdev/floppy.rst similarity index 81% rename from Documentation/blockdev/floppy.txt rename to Documentation/blockdev/floppy.rst index e2240f5ab64d..4a8f31cf4139 100644 --- a/Documentation/blockdev/floppy.txt +++ b/Documentation/blockdev/floppy.rst @@ -1,35 +1,37 @@ -This file describes the floppy driver. +============= +Floppy Driver +============= FAQ list: ========= - A FAQ list may be found in the fdutils package (see below), and also +A FAQ list may be found in the fdutils package (see below), and also at <http://fdutils.linux.lu/faq.html>. LILO configuration options (Thinkpad users, read this) ====================================================== - The floppy driver is configured using the 'floppy=' option in +The floppy driver is configured using the 'floppy=' option in lilo. This option can be typed at the boot prompt, or entered in the lilo configuration file. - Example: If your kernel is called linux-2.6.9, type the following line -at the lilo boot prompt (if you have a thinkpad): +Example: If your kernel is called linux-2.6.9, type the following line +at the lilo boot prompt (if you have a thinkpad):: linux-2.6.9 floppy=thinkpad You may also enter the following line in /etc/lilo.conf, in the description -of linux-2.6.9: +of linux-2.6.9:: append = "floppy=thinkpad" - Several floppy related options may be given, example: +Several floppy related options may be given, example:: linux-2.6.9 floppy=daring floppy=two_fdc append = "floppy=daring floppy=two_fdc" - If you give options both in the lilo config file and on the boot +If you give options both in the lilo config file and on the boot prompt, the option strings of both places are concatenated, the boot prompt options coming last. That's why there are also options to restore the default behavior. @@ -38,21 +40,23 @@ restore the default behavior. Module configuration options ============================ - If you use the floppy driver as a module, use the following syntax: -modprobe floppy floppy="<options>" +If you use the floppy driver as a module, use the following syntax:: -Example: - modprobe floppy floppy="omnibook messages" + modprobe floppy floppy="<options>" - If you need certain options enabled every time you load the floppy driver, -you can put: +Example:: - options floppy floppy="omnibook messages" + modprobe floppy floppy="omnibook messages" + +If you need certain options enabled every time you load the floppy driver, +you can put:: + + options floppy floppy="omnibook messages" in a configuration file in /etc/modprobe.d/. - The floppy driver related options are: +The floppy driver related options are: floppy=asus_pci Sets the bit mask to allow only units 0 and 1. (default) @@ -70,8 +74,7 @@ in a configuration file in /etc/modprobe.d/. Tells the floppy driver that you have only one floppy controller. (default) - floppy=two_fdc - floppy=<address>,two_fdc + floppy=two_fdc / floppy=<address>,two_fdc Tells the floppy driver that you have two floppy controllers. The second floppy controller is assumed to be at <address>. This option is not needed if the second controller is at address @@ -84,8 +87,7 @@ in a configuration file in /etc/modprobe.d/. floppy=0,thinkpad Tells the floppy driver that you don't have a Thinkpad. - floppy=omnibook - floppy=nodma + floppy=omnibook / floppy=nodma Tells the floppy driver not to use Dma for data transfers. This is needed on HP Omnibooks, which don't have a workable DMA channel for the floppy driver. This option is also useful @@ -144,14 +146,16 @@ in a configuration file in /etc/modprobe.d/. described in the physical CMOS), or if your BIOS uses non-standard CMOS types. The CMOS types are: - 0 - Use the value of the physical CMOS - 1 - 5 1/4 DD - 2 - 5 1/4 HD - 3 - 3 1/2 DD - 4 - 3 1/2 HD - 5 - 3 1/2 ED - 6 - 3 1/2 ED - 16 - unknown or not installed + == ================================== + 0 Use the value of the physical CMOS + 1 5 1/4 DD + 2 5 1/4 HD + 3 3 1/2 DD + 4 3 1/2 HD + 5 3 1/2 ED + 6 3 1/2 ED + 16 unknown or not installed + == ================================== (Note: there are two valid types for ED drives. This is because 5 was initially chosen to represent floppy *tapes*, and 6 for ED drives. @@ -162,8 +166,7 @@ in a configuration file in /etc/modprobe.d/. Print a warning message when an unexpected interrupt is received. (default) - floppy=no_unexpected_interrupts - floppy=L40SX + floppy=no_unexpected_interrupts / floppy=L40SX Don't print a message when an unexpected interrupt is received. This is needed on IBM L40SX laptops in certain video modes. (There seems to be an interaction between video and floppy. The unexpected @@ -199,47 +202,54 @@ in a configuration file in /etc/modprobe.d/. Sets the floppy DMA channel to <nr> instead of 2. floppy=slow - Use PS/2 stepping rate: - " PS/2 floppies have much slower step rates than regular floppies. + Use PS/2 stepping rate:: + + PS/2 floppies have much slower step rates than regular floppies. It's been recommended that take about 1/4 of the default speed - in some more extreme cases." + in some more extreme cases. Supporting utilities and additional documentation: ================================================== - Additional parameters of the floppy driver can be configured at +Additional parameters of the floppy driver can be configured at runtime. Utilities which do this can be found in the fdutils package. This package also contains a new version of mtools which allows to access high capacity disks (up to 1992K on a high density 3 1/2 disk!). It also contains additional documentation about the floppy driver. The latest version can be found at fdutils homepage: + http://fdutils.linux.lu The fdutils releases can be found at: + http://fdutils.linux.lu/download.html + http://www.tux.org/pub/knaff/fdutils/ + ftp://metalab.unc.edu/pub/Linux/utils/disk-management/ Reporting problems about the floppy driver ========================================== - If you have a question or a bug report about the floppy driver, mail +If you have a question or a bug report about the floppy driver, mail me at Alain.Knaff(a)poboxes.com . If you post to Usenet, preferably use comp.os.linux.hardware. As the volume in these groups is rather high, be sure to include the word "floppy" (or "FLOPPY") in the subject line. If the reported problem happens when mounting floppy disks, be sure to mention also the type of the filesystem in the subject line. - Be sure to read the FAQ before mailing/posting any bug reports! +Be sure to read the FAQ before mailing/posting any bug reports! - Alain +Alain Changelog ========= -10-30-2004 : Cleanup, updating, add reference to module configuration. +10-30-2004 : + Cleanup, updating, add reference to module configuration. James Nelson <james4765(a)gmail.com> -6-3-2000 : Original Document +6-3-2000 : + Original Document diff --git a/Documentation/blockdev/index.rst b/Documentation/blockdev/index.rst new file mode 100644 index 000000000000..a9af6ed8b4aa --- /dev/null +++ b/Documentation/blockdev/index.rst @@ -0,0 +1,16 @@ +:orphan: + +=========================== +The Linux RapidIO Subsystem +=========================== + +.. toctree:: + :maxdepth: 1 + + floppy + nbd + paride + ramdisk + zram + + drbd/index diff --git a/Documentation/blockdev/nbd.txt b/Documentation/blockdev/nbd.rst similarity index 96% rename from Documentation/blockdev/nbd.txt rename to Documentation/blockdev/nbd.rst index db242ea2bce8..d78dfe559dcf 100644 --- a/Documentation/blockdev/nbd.txt +++ b/Documentation/blockdev/nbd.rst @@ -1,3 +1,4 @@ +================================== Network Block Device (TCP version) ================================== @@ -28,4 +29,3 @@ max_part nbds_max Number of block devices that should be initialized (default: 16). - diff --git a/Documentation/blockdev/paride.txt b/Documentation/blockdev/paride.rst similarity index 81% rename from Documentation/blockdev/paride.txt rename to Documentation/blockdev/paride.rst index ee6717e3771d..87b4278bf314 100644 --- a/Documentation/blockdev/paride.txt +++ b/Documentation/blockdev/paride.rst @@ -1,15 +1,17 @@ - - Linux and parallel port IDE devices +=================================== +Linux and parallel port IDE devices +=================================== PARIDE v1.03 (c) 1997-8 Grant Guenther <grant(a)torque.net> 1. Introduction +=============== Owing to the simplicity and near universality of the parallel port interface to personal computers, many external devices such as portable hard-disk, CD-ROM, LS-120 and tape drives use the parallel port to connect to their host computer. While some devices (notably scanners) use ad-hoc methods -to pass commands and data through the parallel port interface, most +to pass commands and data through the parallel port interface, most external devices are actually identical to an internal model, but with a parallel-port adapter chip added in. Some of the original parallel port adapters were little more than mechanisms for multiplexing a SCSI bus. @@ -28,47 +30,50 @@ were to open up a parallel port CD-ROM drive, for instance, one would find a standard ATAPI CD-ROM drive, a power supply, and a single adapter that interconnected a standard PC parallel port cable and a standard IDE cable. It is usually possible to exchange the CD-ROM device with -any other device using the IDE interface. +any other device using the IDE interface. The document describes the support in Linux for parallel port IDE devices. It does not cover parallel port SCSI devices, "ditto" tape -drives or scanners. Many different devices are supported by the +drives or scanners. Many different devices are supported by the parallel port IDE subsystem, including: - MicroSolutions backpack CD-ROM - MicroSolutions backpack PD/CD - MicroSolutions backpack hard-drives - MicroSolutions backpack 8000t tape drive - SyQuest EZ-135, EZ-230 & SparQ drives - Avatar Shark - Imation Superdisk LS-120 - Maxell Superdisk LS-120 - FreeCom Power CD - Hewlett-Packard 5GB and 8GB tape drives - Hewlett-Packard 7100 and 7200 CD-RW drives + - MicroSolutions backpack CD-ROM + - MicroSolutions backpack PD/CD + - MicroSolutions backpack hard-drives + - MicroSolutions backpack 8000t tape drive + - SyQuest EZ-135, EZ-230 & SparQ drives + - Avatar Shark + - Imation Superdisk LS-120 + - Maxell Superdisk LS-120 + - FreeCom Power CD + - Hewlett-Packard 5GB and 8GB tape drives + - Hewlett-Packard 7100 and 7200 CD-RW drives as well as most of the clone and no-name products on the market. To support such a wide range of devices, PARIDE, the parallel port IDE subsystem, is actually structured in three parts. There is a base paride module which provides a registry and some common methods for -accessing the parallel ports. The second component is a set of -high-level drivers for each of the different types of supported devices: +accessing the parallel ports. The second component is a set of +high-level drivers for each of the different types of supported devices: + === ============= pd IDE disk pcd ATAPI CD-ROM pf ATAPI disk pt ATAPI tape pg ATAPI generic + === ============= (Currently, the pg driver is only used with CD-R drives). The high-level drivers function according to the relevant standards. The third component of PARIDE is a set of low-level protocol drivers for each of the parallel port IDE adapter chips. Thanks to the interest -and encouragement of Linux users from many parts of the world, +and encouragement of Linux users from many parts of the world, support is available for almost all known adapter protocols: + ==== ====================================== ==== aten ATEN EH-100 (HK) bpck Microsolutions backpack (US) comm DataStor (old-type) "commuter" adapter (TW) @@ -83,9 +88,11 @@ support is available for almost all known adapter protocols: ktti KT Technology PHd adapter (SG) on20 OnSpec 90c20 (US) on26 OnSpec 90c26 (US) + ==== ====================================== ==== 2. Using the PARIDE subsystem +============================= While configuring the Linux kernel, you may choose either to build the PARIDE drivers into your kernel, or to build them as modules. @@ -94,10 +101,10 @@ In either case, you will need to select "Parallel port IDE device support" as well as at least one of the high-level drivers and at least one of the parallel port communication protocols. If you do not know what kind of parallel port adapter is used in your drive, you could -begin by checking the file names and any text files on your DOS +begin by checking the file names and any text files on your DOS installation floppy. Alternatively, you can look at the markings on the adapter chip itself. That's usually sufficient to identify the -correct device. +correct device. You can actually select all the protocol modules, and allow the PARIDE subsystem to try them all for you. @@ -105,8 +112,9 @@ subsystem to try them all for you. For the "brand-name" products listed above, here are the protocol and high-level drivers that you would use: + ================ ============ ====== ======== Manufacturer Model Driver Protocol - + ================ ============ ====== ======== MicroSolutions CD-ROM pcd bpck MicroSolutions PD drive pf bpck MicroSolutions hard-drive pd bpck @@ -119,8 +127,10 @@ and high-level drivers that you would use: Hewlett-Packard 5GB Tape pt epat Hewlett-Packard 7200e (CD) pcd epat Hewlett-Packard 7200e (CD-R) pg epat + ================ ============ ====== ======== 2.1 Configuring built-in drivers +--------------------------------- We recommend that you get to know how the drivers work and how to configure them as loadable modules, before attempting to compile a @@ -143,7 +153,7 @@ protocol identification number and, for some devices, the drive's chain ID. While your system is booting, a number of messages are displayed on the console. Like all such messages, they can be reviewed with the 'dmesg' command. Among those messages will be -some lines like: +some lines like:: paride: bpck registered as protocol 0 paride: epat registered as protocol 1 @@ -158,10 +168,10 @@ the last two digits of the drive's serial number (but read MicroSolutions' documentation about this). As an example, let's assume that you have a MicroSolutions PD/CD drive -with unit ID number 36 connected to the parallel port at 0x378, a SyQuest -EZ-135 connected to the chained port on the PD/CD drive and also an -Imation Superdisk connected to port 0x278. You could give the following -options on your boot command: +with unit ID number 36 connected to the parallel port at 0x378, a SyQuest +EZ-135 connected to the chained port on the PD/CD drive and also an +Imation Superdisk connected to port 0x278. You could give the following +options on your boot command:: pd.drive0=0x378,1 pf.drive0=0x278,1 pf.drive1=0x378,0,36 @@ -169,24 +179,27 @@ In the last option, pf.drive1 configures device /dev/pf1, the 0x378 is the parallel port base address, the 0 is the protocol registration number and 36 is the chain ID. -Please note: while PARIDE will work both with and without the +Please note: while PARIDE will work both with and without the PARPORT parallel port sharing system that is included by the "Parallel port support" option, PARPORT must be included and enabled if you want to use chains of devices on the same parallel port. 2.2 Loading and configuring PARIDE as modules +---------------------------------------------- It is much faster and simpler to get to understand the PARIDE drivers -if you use them as loadable kernel modules. +if you use them as loadable kernel modules. -Note 1: using these drivers with the "kerneld" automatic module loading -system is not recommended for beginners, and is not documented here. +Note 1: + using these drivers with the "kerneld" automatic module loading + system is not recommended for beginners, and is not documented here. -Note 2: if you build PARPORT support as a loadable module, PARIDE must -also be built as loadable modules, and PARPORT must be loaded before the -PARIDE modules. +Note 2: + if you build PARPORT support as a loadable module, PARIDE must + also be built as loadable modules, and PARPORT must be loaded before + the PARIDE modules. -To use PARIDE, you must begin by +To use PARIDE, you must begin by:: insmod paride @@ -195,8 +208,8 @@ among other tasks. Then, load as many of the protocol modules as you think you might need. As you load each module, it will register the protocols that it supports, -and print a log message to your kernel log file and your console. For -example: +and print a log message to your kernel log file and your console. For +example:: # insmod epat paride: epat registered as protocol 0 @@ -205,22 +218,22 @@ example: paride: k971 registered as protocol 2 Finally, you can load high-level drivers for each kind of device that -you have connected. By default, each driver will autoprobe for a single +you have connected. By default, each driver will autoprobe for a single device, but you can support up to four similar devices by giving their individual co-ordinates when you load the driver. For example, if you had two no-name CD-ROM drives both using the KingByte KBIC-951A adapter, one on port 0x378 and the other on 0x3bc -you could give the following command: +you could give the following command:: # insmod pcd drive0=0x378,1 drive1=0x3bc,1 For most adapters, giving a port address and protocol number is sufficient, -but check the source files in linux/drivers/block/paride for more +but check the source files in linux/drivers/block/paride for more information. (Hopefully someone will write some man pages one day !). As another example, here's what happens when PARPORT is installed, and -a SyQuest EZ-135 is attached to port 0x378: +a SyQuest EZ-135 is attached to port 0x378:: # insmod paride paride: version 1.0 installed @@ -237,46 +250,47 @@ Note that the last line is the output from the generic partition table scanner - in this case it reports that it has found a disk with one partition. 2.3 Using a PARIDE device +-------------------------- Once the drivers have been loaded, you can access PARIDE devices in the same way as their traditional counterparts. You will probably need to create the device "special files". Here is a simple script that you can -cut to a file and execute: +cut to a file and execute:: -#!/bin/bash -# -# mkd -- a script to create the device special files for the PARIDE subsystem -# -function mkdev { - mknod $1 $2 $3 $4 ; chmod 0660 $1 ; chown root:disk $1 -} -# -function pd { - D=$( printf \\$( printf "x%03x" $[ $1 + 97 ] ) ) - mkdev pd$D b 45 $[ $1 * 16 ] - for P in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 - do mkdev pd$D$P b 45 $[ $1 * 16 + $P ] - done -} -# -cd /dev -# -for u in 0 1 2 3 ; do pd $u ; done -for u in 0 1 2 3 ; do mkdev pcd$u b 46 $u ; done -for u in 0 1 2 3 ; do mkdev pf$u b 47 $u ; done -for u in 0 1 2 3 ; do mkdev pt$u c 96 $u ; done -for u in 0 1 2 3 ; do mkdev npt$u c 96 $[ $u + 128 ] ; done -for u in 0 1 2 3 ; do mkdev pg$u c 97 $u ; done -# -# end of mkd + #!/bin/bash + # + # mkd -- a script to create the device special files for the PARIDE subsystem + # + function mkdev { + mknod $1 $2 $3 $4 ; chmod 0660 $1 ; chown root:disk $1 + } + # + function pd { + D=$( printf \\$( printf "x%03x" $[ $1 + 97 ] ) ) + mkdev pd$D b 45 $[ $1 * 16 ] + for P in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 + do mkdev pd$D$P b 45 $[ $1 * 16 + $P ] + done + } + # + cd /dev + # + for u in 0 1 2 3 ; do pd $u ; done + for u in 0 1 2 3 ; do mkdev pcd$u b 46 $u ; done + for u in 0 1 2 3 ; do mkdev pf$u b 47 $u ; done + for u in 0 1 2 3 ; do mkdev pt$u c 96 $u ; done + for u in 0 1 2 3 ; do mkdev npt$u c 96 $[ $u + 128 ] ; done + for u in 0 1 2 3 ; do mkdev pg$u c 97 $u ; done + # + # end of mkd With the device files and drivers in place, you can access PARIDE devices -like any other Linux device. For example, to mount a CD-ROM in pcd0, use: +like any other Linux device. For example, to mount a CD-ROM in pcd0, use:: mount /dev/pcd0 /cdrom If you have a fresh Avatar Shark cartridge, and the drive is pda, you -might do something like: +might do something like:: fdisk /dev/pda -- make a new partition table with partition 1 of type 83 @@ -289,41 +303,46 @@ might do something like: Devices like the Imation superdisk work in the same way, except that they do not have a partition table. For example to make a 120MB -floppy that you could share with a DOS system: +floppy that you could share with a DOS system:: mkdosfs /dev/pf0 mount /dev/pf0 /mnt 2.4 The pf driver +------------------ The pf driver is intended for use with parallel port ATAPI disk devices. The most common devices in this category are PD drives and LS-120 drives. Traditionally, media for these devices are not partitioned. Consequently, the pf driver does not support partitioned -media. This may be changed in a future version of the driver. +media. This may be changed in a future version of the driver. 2.5 Using the pt driver +------------------------ The pt driver for parallel port ATAPI tape drives is a minimal driver. -It does not yet support many of the standard tape ioctl operations. +It does not yet support many of the standard tape ioctl operations. For best performance, a block size of 32KB should be used. You will probably want to set the parallel port delay to 0, if you can. 2.6 Using the pg driver +------------------------ The pg driver can be used in conjunction with the cdrecord program to create CD-ROMs. Please get cdrecord version 1.6.1 or later -from ftp://ftp.fokus.gmd.de/pub/unix/cdrecord/ . To record CD-R media -your parallel port should ideally be set to EPP mode, and the "port delay" -should be set to 0. With those settings it is possible to record at 2x +from ftp://ftp.fokus.gmd.de/pub/unix/cdrecord/ . To record CD-R media +your parallel port should ideally be set to EPP mode, and the "port delay" +should be set to 0. With those settings it is possible to record at 2x speed without any buffer underruns. If you cannot get the driver to work in EPP mode, try to use "bidirectional" or "PS/2" mode and 1x speeds only. 3. Troubleshooting +================== 3.1 Use EPP mode if you can +---------------------------- The most common problems that people report with the PARIDE drivers concern the parallel port CMOS settings. At this time, none of the @@ -332,6 +351,7 @@ If you are able to do so, please set your parallel port into EPP mode using your CMOS setup procedure. 3.2 Check the port delay +------------------------- Some parallel ports cannot reliably transfer data at full speed. To offset the errors, the PARIDE protocol modules introduce a "port @@ -347,23 +367,25 @@ read the comments at the beginning of the driver source files in linux/drivers/block/paride. 3.3 Some drives need a printer reset +------------------------------------- There appear to be a number of "noname" external drives on the market that do not always power up correctly. We have noticed this with some drives based on OnSpec and older Freecom adapters. In these rare cases, the adapter can often be reinitialised by issuing a "printer reset" on -the parallel port. As the reset operation is potentially disruptive in -multiple device environments, the PARIDE drivers will not do it -automatically. You can however, force a printer reset by doing: +the parallel port. As the reset operation is potentially disruptive in +multiple device environments, the PARIDE drivers will not do it +automatically. You can however, force a printer reset by doing:: insmod lp reset=1 rmmod lp If you have one of these marginal cases, you should probably build your paride drivers as modules, and arrange to do the printer reset -before loading the PARIDE drivers. +before loading the PARIDE drivers. 3.4 Use the verbose option and dmesg if you need help +------------------------------------------------------ While a lot of testing has gone into these drivers to make them work as smoothly as possible, problems will arise. If you do have problems, @@ -373,7 +395,7 @@ clues, then please make sure that only one drive is hooked to your system, and that either (a) PARPORT is enabled or (b) no other device driver is using your parallel port (check in /proc/ioports). Then, load the appropriate drivers (you can load several protocol modules if you want) -as in: +as in:: # insmod paride # insmod epat @@ -394,12 +416,14 @@ by e-mail to grant(a)torque.net, or join the linux-parport mailing list and post your report there. 3.5 For more information or help +--------------------------------- You can join the linux-parport mailing list by sending a mail message -to +to: + linux-parport-request(a)torque.net -with the single word +with the single word:: subscribe @@ -412,6 +436,4 @@ have in your mail headers, when sending mail to the list server. You might also find some useful information on the linux-parport web pages (although they are not always up to date) at - http://web.archive.org/web/*/http://www.torque.net/parport/ - - + http://web.archive.org/web/%2E/http://www.torque.net/parport/ diff --git a/Documentation/blockdev/ramdisk.txt b/Documentation/blockdev/ramdisk.rst similarity index 84% rename from Documentation/blockdev/ramdisk.txt rename to Documentation/blockdev/ramdisk.rst index 501e12e0323e..b7c2268f8dec 100644 --- a/Documentation/blockdev/ramdisk.txt +++ b/Documentation/blockdev/ramdisk.rst @@ -1,7 +1,8 @@ +========================================== Using the RAM disk block device with Linux ------------------------------------------- +========================================== -Contents: +.. Contents: 1) Overview 2) Kernel Command Line Parameters @@ -42,7 +43,7 @@ rescue floppy disk. 2a) Kernel Command Line Parameters ramdisk_size=N - ============== + Size of the ramdisk. This parameter tells the RAM disk driver to set up RAM disks of N k size. The default is 4096 (4 MB). @@ -50,16 +51,13 @@ default is 4096 (4 MB). 2b) Module parameters rd_nr - ===== - /dev/ramX devices created. + /dev/ramX devices created. max_part - ======== - Maximum partition number. + Maximum partition number. rd_size - ======= - See ramdisk_size. + See ramdisk_size. 3) Using "rdev -r" ------------------ @@ -71,11 +69,11 @@ to 2 MB (2^11) of where to find the RAM disk (this used to be the size). Bit prompt/wait sequence is to be given before trying to read the RAM disk. Since the RAM disk dynamically grows as data is being written into it, a size field is not required. Bits 11 to 13 are not currently used and may as well be zero. -These numbers are no magical secrets, as seen below: +These numbers are no magical secrets, as seen below:: -./arch/x86/kernel/setup.c:#define RAMDISK_IMAGE_START_MASK 0x07FF -./arch/x86/kernel/setup.c:#define RAMDISK_PROMPT_FLAG 0x8000 -./arch/x86/kernel/setup.c:#define RAMDISK_LOAD_FLAG 0x4000 + ./arch/x86/kernel/setup.c:#define RAMDISK_IMAGE_START_MASK 0x07FF + ./arch/x86/kernel/setup.c:#define RAMDISK_PROMPT_FLAG 0x8000 + ./arch/x86/kernel/setup.c:#define RAMDISK_LOAD_FLAG 0x4000 Consider a typical two floppy disk setup, where you will have the kernel on disk one, and have already put a RAM disk image onto disk #2. @@ -92,20 +90,23 @@ sequence so that you have a chance to switch floppy disks. The command line equivalent is: "prompt_ramdisk=1" Putting that together gives 2^15 + 2^14 + 0 = 49152 for an rdev word. -So to create disk one of the set, you would do: +So to create disk one of the set, you would do:: /usr/src/linux# cat arch/x86/boot/zImage > /dev/fd0 /usr/src/linux# rdev /dev/fd0 /dev/fd0 /usr/src/linux# rdev -r /dev/fd0 49152 -If you make a boot disk that has LILO, then for the above, you would use: +If you make a boot disk that has LILO, then for the above, you would use:: + append = "ramdisk_start=0 load_ramdisk=1 prompt_ramdisk=1" -Since the default start = 0 and the default prompt = 1, you could use: + +Since the default start = 0 and the default prompt = 1, you could use:: + append = "load_ramdisk=1" 4) An Example of Creating a Compressed RAM Disk ----------------------------------------------- +----------------------------------------------- To create a RAM disk image, you will need a spare block device to construct it on. This can be the RAM disk device itself, or an @@ -120,11 +121,11 @@ a) Decide on the RAM disk size that you want. Say 2 MB for this example. Create it by writing to the RAM disk device. (This step is not currently required, but may be in the future.) It is wise to zero out the area (esp. for disks) so that maximal compression is achieved for - the unused blocks of the image that you are about to create. + the unused blocks of the image that you are about to create:: dd if=/dev/zero of=/dev/ram0 bs=1k count=2048 -b) Make a filesystem on it. Say ext2fs for this example. +b) Make a filesystem on it. Say ext2fs for this example:: mke2fs -vm0 /dev/ram0 2048 @@ -133,11 +134,11 @@ c) Mount it, copy the files you want to it (eg: /etc/* /dev/* ...) d) Compress the contents of the RAM disk. The level of compression will be approximately 50% of the space used by the files. Unused - space on the RAM disk will compress to almost nothing. + space on the RAM disk will compress to almost nothing:: dd if=/dev/ram0 bs=1k count=2048 | gzip -v9 > /tmp/ram_image.gz -e) Put the kernel onto the floppy +e) Put the kernel onto the floppy:: dd if=zImage of=/dev/fd0 bs=1k @@ -146,13 +147,13 @@ f) Put the RAM disk image onto the floppy, after the kernel. Use an offset (possibly larger) kernel onto the same floppy later without overlapping the RAM disk image. An offset of 400 kB for kernels about 350 kB in size would be reasonable. Make sure offset+size of ram_image.gz is - not larger than the total space on your floppy (usually 1440 kB). + not larger than the total space on your floppy (usually 1440 kB):: dd if=/tmp/ram_image.gz of=/dev/fd0 bs=1k seek=400 g) Use "rdev" to set the boot device, RAM disk offset, prompt flag, etc. For prompt_ramdisk=1, load_ramdisk=1, ramdisk_start=400, one would - have 2^15 + 2^14 + 400 = 49552. + have 2^15 + 2^14 + 400 = 49552:: rdev /dev/fd0 /dev/fd0 rdev -r /dev/fd0 49552 @@ -160,15 +161,17 @@ g) Use "rdev" to set the boot device, RAM disk offset, prompt flag, etc. That is it. You now have your boot/root compressed RAM disk floppy. Some users may wish to combine steps (d) and (f) by using a pipe. --------------------------------------------------------------------------- + Paul Gortmaker 12/95 Changelog: ---------- -10-22-04 : Updated to reflect changes in command line options, remove +10-22-04 : + Updated to reflect changes in command line options, remove obsolete references, general cleanup. James Nelson (james4765(a)gmail.com) -12-95 : Original Document +12-95 : + Original Document diff --git a/Documentation/blockdev/zram.txt b/Documentation/blockdev/zram.rst similarity index 76% rename from Documentation/blockdev/zram.txt rename to Documentation/blockdev/zram.rst index 4df0ce271085..2111231c9c0f 100644 --- a/Documentation/blockdev/zram.txt +++ b/Documentation/blockdev/zram.rst @@ -1,7 +1,9 @@ +======================================== zram: Compressed RAM based block devices ----------------------------------------- +======================================== -* Introduction +Introduction +============ The zram module creates RAM based block devices named /dev/zram<id> (<id> = 0, 1, ...). Pages written to these disks are compressed and stored @@ -12,9 +14,11 @@ use as swap disks, various caches under /var and maybe many more :) Statistics for individual zram devices are exported through sysfs nodes at /sys/block/zram<id>/ -* Usage +Usage +===== There are several ways to configure and manage zram device(-s): + a) using zram and zram_control sysfs attributes b) using zramctl utility, provided by util-linux (util-linux(a)vger.kernel.org). @@ -22,7 +26,7 @@ In this document we will describe only 'manual' zram configuration steps, IOW, zram and zram_control sysfs attributes. In order to get a better idea about zramctl please consult util-linux -documentation, zramctl man-page or `zramctl --help'. Please be informed +documentation, zramctl man-page or `zramctl --help`. Please be informed that zram maintainers do not develop/maintain util-linux or zramctl, should you have any questions please contact util-linux(a)vger.kernel.org @@ -30,19 +34,23 @@ Following shows a typical sequence of steps for using zram. WARNING ======= + For the sake of simplicity we skip error checking parts in most of the examples below. However, it is your sole responsibility to handle errors. zram sysfs attributes always return negative values in case of errors. The list of possible return codes: --EBUSY -- an attempt to modify an attribute that cannot be changed once -the device has been initialised. Please reset device first; --ENOMEM -- zram was not able to allocate enough memory to fulfil your -needs; --EINVAL -- invalid input has been provided. + +======== ============================================================= +-EBUSY an attempt to modify an attribute that cannot be changed once + the device has been initialised. Please reset device first; +-ENOMEM zram was not able to allocate enough memory to fulfil your + needs; +-EINVAL invalid input has been provided. +======== ============================================================= If you use 'echo', the returned value that is changed by 'echo' utility, -and, in general case, something like: +and, in general case, something like:: echo 3 > /sys/block/zram0/max_comp_streams if [ $? -ne 0 ]; @@ -51,7 +59,11 @@ and, in general case, something like: should suffice. -1) Load Module: +1) Load Module +============== + +:: + modprobe zram num_devices=4 This creates 4 devices: /dev/zram{0,1,2,3} @@ -59,6 +71,8 @@ num_devices parameter is optional and tells zram how many devices should be pre-created. Default: 1. 2) Set max number of compression streams +======================================== + Regardless the value passed to this attribute, ZRAM will always allocate multiple compression streams - one per online CPUs - thus allowing several concurrent compression operations. The number of @@ -66,16 +80,20 @@ allocated compression streams goes down when some of the CPUs become offline. There is no single-compression-stream mode anymore, unless you are running a UP system or has only 1 CPU online. -To find out how many streams are currently available: +To find out how many streams are currently available:: + cat /sys/block/zram0/max_comp_streams 3) Select compression algorithm +=============================== + Using comp_algorithm device attribute one can see available and currently selected (shown in square brackets) compression algorithms, change selected compression algorithm (once the device is initialised there is no way to change compression algorithm). -Examples: +Examples:: + #show supported compression algorithms cat /sys/block/zram0/comp_algorithm lzo [lz4] @@ -83,20 +101,23 @@ Examples: #select lzo compression algorithm echo lzo > /sys/block/zram0/comp_algorithm -For the time being, the `comp_algorithm' content does not necessarily +For the time being, the `comp_algorithm` content does not necessarily show every compression algorithm supported by the kernel. We keep this list primarily to simplify device configuration and one can configure a new device with a compression algorithm that is not listed in -`comp_algorithm'. The thing is that, internally, ZRAM uses Crypto API +`comp_algorithm`. The thing is that, internally, ZRAM uses Crypto API and, if some of the algorithms were built as modules, it's impossible to list all of them using, for instance, /proc/crypto or any other method. This, however, has an advantage of permitting the usage of custom crypto compression modules (implementing S/W or H/W compression). 4) Set Disksize +=============== + Set disk size by writing the value to sysfs node 'disksize'. The value can be either in bytes or you can use mem suffixes. -Examples: +Examples:: + # Initialize /dev/zram0 with 50MB disksize echo $((50*1024*1024)) > /sys/block/zram0/disksize @@ -111,10 +132,13 @@ since we expect a 2:1 compression ratio. Note that zram uses about 0.1% of the size of the disk when not in use so a huge zram is wasteful. 5) Set memory limit: Optional +============================= + Set memory limit by writing the value to sysfs node 'mem_limit'. The value can be either in bytes or you can use mem suffixes. In addition, you could change the value in runtime. -Examples: +Examples:: + # limit /dev/zram0 with 50MB memory echo $((50*1024*1024)) > /sys/block/zram0/mem_limit @@ -126,7 +150,11 @@ Examples: # To disable memory limit echo 0 > /sys/block/zram0/mem_limit -6) Activate: +6) Activate +=========== + +:: + mkswap /dev/zram0 swapon /dev/zram0 @@ -134,6 +162,7 @@ Examples: mount /dev/zram1 /tmp 7) Add/remove zram devices +========================== zram provides a control interface, which enables dynamic (on-demand) device addition and removal. @@ -142,37 +171,44 @@ In order to add a new /dev/zramX device, perform read operation on hot_add attribute. This will return either new device's device id (meaning that you can use /dev/zram<id>) or error code. -Example: +Example:: + cat /sys/class/zram-control/hot_add 1 To remove the existing /dev/zramX device (where X is a device id) -execute +execute:: + echo X > /sys/class/zram-control/hot_remove -8) Stats: +8) Stats +======== + Per-device statistics are exported as various nodes under /sys/block/zram<id>/ A brief description of exported device attributes. For more details please read Documentation/ABI/testing/sysfs-block-zram. +====================== ====== =============================================== Name access description ----- ------ ----------- +====================== ====== =============================================== disksize RW show and set the device's disk size initstate RO shows the initialization state of the device reset WO trigger device reset -mem_used_max WO reset the `mem_used_max' counter (see later) -mem_limit WO specifies the maximum amount of memory ZRAM can use - to store the compressed data -writeback_limit WO specifies the maximum amount of write IO zram can - write out to backing device as 4KB unit +mem_used_max WO reset the `mem_used_max` counter (see later) +mem_limit WO specifies the maximum amount of memory ZRAM can + use to store the compressed data +writeback_limit WO specifies the maximum amount of write IO zram + can write out to backing device as 4KB unit writeback_limit_enable RW show and set writeback_limit feature -max_comp_streams RW the number of possible concurrent compress operations +max_comp_streams RW the number of possible concurrent compress + operations comp_algorithm RW show and change the compression algorithm compact WO trigger memory compaction debug_stat RO this file is used for zram debugging purposes backing_dev RW set up backend storage for zram to write out idle WO mark allocated slot as idle +====================== ====== =============================================== User space is advised to use the following files to read the device statistics. @@ -188,23 +224,31 @@ The stat file represents device's I/O statistics not accounted by block layer and, thus, not available in zram<id>/stat file. It consists of a single line of text and contains the following stats separated by whitespace: - failed_reads the number of failed reads - failed_writes the number of failed writes - invalid_io the number of non-page-size-aligned I/O requests + + ============= ============================================================= + failed_reads The number of failed reads + failed_writes The number of failed writes + invalid_io The number of non-page-size-aligned I/O requests notify_free Depending on device usage scenario it may account + a) the number of pages freed because of swap slot free - notifications or b) the number of pages freed because of - REQ_OP_DISCARD requests sent by bio. The former ones are - sent to a swap block device when a swap slot is freed, - which implies that this disk is being used as a swap disk. + notifications + b) the number of pages freed because of + REQ_OP_DISCARD requests sent by bio. The former ones are + sent to a swap block device when a swap slot is freed, + which implies that this disk is being used as a swap disk. + The latter ones are sent by filesystem mounted with discard option, whenever some data blocks are getting discarded. + ============= ============================================================= File /sys/block/zram<id>/mm_stat The stat file represents device's mm statistics. It consists of a single line of text and contains the following stats separated by whitespace: + + ================ ============================================================= orig_data_size uncompressed size of data stored in this disk. This excludes same-element-filled pages (same_pages) since no memory is allocated for them. @@ -223,58 +267,71 @@ line of text and contains the following stats separated by whitespace: No memory is allocated for such pages. pages_compacted the number of pages freed during compaction huge_pages the number of incompressible pages + ================ ============================================================= File /sys/block/zram<id>/bd_stat The stat file represents device's backing device statistics. It consists of a single line of text and contains the following stats separated by whitespace: + + ============== ============================================================= bd_count size of data written in backing device. Unit: 4K bytes bd_reads the number of reads from backing device Unit: 4K bytes bd_writes the number of writes to backing device Unit: 4K bytes + ============== ============================================================= + +9) Deactivate +============= + +:: -9) Deactivate: swapoff /dev/zram0 umount /dev/zram1 -10) Reset: - Write any positive value to 'reset' sysfs node - echo 1 > /sys/block/zram0/reset - echo 1 > /sys/block/zram1/reset +10) Reset +========= + + Write any positive value to 'reset' sysfs node:: + + echo 1 > /sys/block/zram0/reset + echo 1 > /sys/block/zram1/reset This frees all the memory allocated for the given device and resets the disksize to zero. You must set the disksize again before reusing the device. -* Optional Feature +Optional Feature +================ -= writeback +writeback +--------- With CONFIG_ZRAM_WRITEBACK, zram can write idle/incompressible page to backing storage rather than keeping it in memory. -To use the feature, admin should set up backing device via +To use the feature, admin should set up backing device via:: - "echo /dev/sda5 > /sys/block/zramX/backing_dev" + echo /dev/sda5 > /sys/block/zramX/backing_dev before disksize setting. It supports only partition at this moment. -If admin want to use incompressible page writeback, they could do via +If admin want to use incompressible page writeback, they could do via:: - "echo huge > /sys/block/zramX/write" + echo huge > /sys/block/zramX/write To use idle page writeback, first, user need to declare zram pages -as idle. +as idle:: - "echo all > /sys/block/zramX/idle" + echo all > /sys/block/zramX/idle From now on, any pages on zram are idle pages. The idle mark will be removed until someone request access of the block. IOW, unless there is access request, those pages are still idle pages. -Admin can request writeback of those idle pages at right timing via +Admin can request writeback of those idle pages at right timing via:: - "echo idle > /sys/block/zramX/writeback" + echo idle > /sys/block/zramX/writeback With the command, zram writeback idle pages from memory to the storage. @@ -285,7 +342,7 @@ to guarantee storage health for entire product life. To overcome the concern, zram supports "writeback_limit" feature. The "writeback_limit_enable"'s default value is 0 so that it doesn't limit any writeback. IOW, if admin want to apply writeback budget, he should -enable writeback_limit_enable via +enable writeback_limit_enable via:: $ echo 1 > /sys/block/zramX/writeback_limit_enable @@ -296,7 +353,7 @@ until admin set the budget via /sys/block/zramX/writeback_limit. assigned via /sys/block/zramX/writeback_limit is meaninless.) If admin want to limit writeback as per-day 400M, he could do it -like below. +like below:: $ MB_SHIFT=20 $ 4K_SHIFT=12 @@ -305,16 +362,16 @@ like below. $ echo 1 > /sys/block/zram0/writeback_limit_enable If admin want to allow further write again once the bugdet is exausted, -he could do it like below +he could do it like below:: $ echo $((400<<MB_SHIFT>>4K_SHIFT)) > \ /sys/block/zram0/writeback_limit -If admin want to see remaining writeback budget since he set, +If admin want to see remaining writeback budget since he set:: $ cat /sys/block/zramX/writeback_limit -If admin want to disable writeback limit, he could do +If admin want to disable writeback limit, he could do:: $ echo 0 > /sys/block/zramX/writeback_limit_enable @@ -326,25 +383,35 @@ budget in next setting is user's job. If admin want to measure writeback count in a certain period, he could know it via /sys/block/zram0/bd_stat's 3rd column. -= memory tracking +memory tracking +=============== With CONFIG_ZRAM_MEMORY_TRACKING, user can know information of the zram block. It could be useful to catch cold or incompressible pages of the process with*pagemap. + If you enable the feature, you could see block state via -/sys/kernel/debug/zram/zram0/block_state". The output is as follows, +/sys/kernel/debug/zram/zram0/block_state". The output is as follows:: 300 75.033841 .wh. 301 63.806904 s... 302 63.806919 ..hi -First column is zram's block index. -Second column is access time since the system was booted -Third column is state of the block. -(s: same page -w: written page to backing store -h: huge page -i: idle page) +First column + zram's block index. +Second column + access time since the system was booted +Third column + state of the block: + + s: + same page + w: + written page to backing store + h: + huge page + i: + idle page First line of above example says 300th block is accessed at 75.033841sec and the block's state is huge so it is written back to the backing diff --git a/MAINTAINERS b/MAINTAINERS index b2254bc8e495..163327d6a856 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10961,7 +10961,7 @@ M: Josef Bacik <josef(a)toxicpanda.com> S: Maintained L: linux-block(a)vger.kernel.org L: nbd(a)other.debian.org -F: Documentation/blockdev/nbd.txt +F: Documentation/blockdev/nbd.rst F: drivers/block/nbd.c F: include/trace/events/nbd.h F: include/uapi/linux/nbd.h @@ -11963,7 +11963,7 @@ PARIDE DRIVERS FOR PARALLEL PORT IDE DEVICES M: Tim Waugh <tim(a)cyberelk.net> L: linux-parport(a)lists.infradead.org (subscribers-only) S: Maintained -F: Documentation/blockdev/paride.txt +F: Documentation/blockdev/paride.rst F: drivers/block/paride/ PARISC ARCHITECTURE @@ -13245,7 +13245,7 @@ F: drivers/net/wireless/ralink/rt2x00/ RAMDISK RAM BLOCK DEVICE DRIVER M: Jens Axboe <axboe(a)kernel.dk> S: Maintained -F: Documentation/blockdev/ramdisk.txt +F: Documentation/blockdev/ramdisk.rst F: drivers/block/brd.c RANCHU VIRTUAL BOARD FOR MIPS @@ -17584,7 +17584,7 @@ R: Sergey Senozhatsky <sergey.senozhatsky.work(a)gmail.com> L: linux-kernel(a)vger.kernel.org S: Maintained F: drivers/block/zram/ -F: Documentation/blockdev/zram.txt +F: Documentation/blockdev/zram.rst ZS DECSTATION Z85C30 SERIAL DRIVER M: "Maciej W. Rozycki" <macro(a)linux-mips.org> diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 96ec7e0fc1ea..c43690b973d8 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -31,7 +31,7 @@ config BLK_DEV_FD If you want to use the floppy disk drive(s) of your PC under Linux, say Y. Information about this driver, especially important for IBM Thinkpad users, is contained in - <file:Documentation/blockdev/floppy.txt>. + <file:Documentation/blockdev/floppy.rst>. That file also contains the location of the Floppy driver FAQ as well as location of the fdutils package used to configure additional parameters of the driver at run time. @@ -96,7 +96,7 @@ config PARIDE your computer's parallel port. Most of them are actually IDE devices using a parallel port IDE adapter. This option enables the PARIDE subsystem which contains drivers for many of these external drives. - Read <file:Documentation/blockdev/paride.txt> for more information. + Read <file:Documentation/blockdev/paride.rst> for more information. If you have said Y to the "Parallel-port support" configuration option, you may share a single port between your printer and other @@ -261,7 +261,7 @@ config BLK_DEV_NBD userland (making server and client physically the same computer, communicating using the loopback network device). - Read <file:Documentation/blockdev/nbd.txt> for more information, + Read <file:Documentation/blockdev/nbd.rst> for more information, especially about where to find the server code, which runs in user space and does not need special kernel support. @@ -303,7 +303,7 @@ config BLK_DEV_RAM during the initial install of Linux. Note that the kernel command line option "ramdisk=XX" is now obsolete. - For details, read <file:Documentation/blockdev/ramdisk.txt>. + For details, read <file:Documentation/blockdev/ramdisk.rst>. To compile this driver as a module, choose M here: the module will be called brd. An alias "rd" has been defined diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 9fb9b312ab6b..af02ca97dcd6 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -4424,7 +4424,7 @@ static int __init floppy_setup(char *str) pr_cont("\n"); } else DPRINT("botched floppy option\n"); - DPRINT("Read Documentation/blockdev/floppy.txt\n"); + DPRINT("Read Documentation/blockdev/floppy.rst\n"); return 0; } diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 1ffc64770643..e06b99d54816 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -12,7 +12,7 @@ config ZRAM It has several use cases, for example: /tmp storage, use as swap disks and maybe many more. - See Documentation/blockdev/zram.txt for more information. + See Documentation/blockdev/zram.rst for more information. config ZRAM_WRITEBACK bool "Write back incompressible or idle page to backing device" @@ -26,7 +26,7 @@ config ZRAM_WRITEBACK With /sys/block/zramX/{idle,writeback}, application could ask idle page's writeback to the backing device to save in memory. - See Documentation/blockdev/zram.txt for more information. + See Documentation/blockdev/zram.rst for more information. config ZRAM_MEMORY_TRACKING bool "Track zRam block status" @@ -36,4 +36,4 @@ config ZRAM_MEMORY_TRACKING of zRAM. Admin could see the information via /sys/kernel/debug/zram/zramX/block_state. - See Documentation/blockdev/zram.txt for more information. + See Documentation/blockdev/zram.rst for more information. diff --git a/tools/testing/selftests/zram/README b/tools/testing/selftests/zram/README index 7972cc512408..5fa378391d3b 100644 --- a/tools/testing/selftests/zram/README +++ b/tools/testing/selftests/zram/README @@ -37,4 +37,4 @@ Commands required for testing: - mkfs/ mkfs.ext4 For more information please refer: -kernel-source-tree/Documentation/blockdev/zram.txt +kernel-source-tree/Documentation/blockdev/zram.rst -- 2.21.0

6 years, 6 months

1
0
0 0

kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0

by Naresh Kamboju

Kernel warning while running kernel selftest bpf test_sockmap test case on x86_64 and arm64. The kernel warning log pops up continuously. Linux version 5.1.10-rc2 Steps to reproduce: Boot stable rc 5.1.10-rc2 kernel on x86_64 or arm64 cd selftests/bpf ./test_sockmap [ 37.600406] WARNING: CPU: 3 PID: 57 at /usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0 [ 37.610034] Modules linked in: x86_pkg_temp_thermal fuse [ 37.615371] CPU: 3 PID: 57 Comm: kworker/3:1 Not tainted 5.1.10-rc2 #1 [ 37.615454] WARNING: CPU: 0 PID: 5 at /usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0 [ 37.621892] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 37.621895] Workqueue: events sk_psock_destroy_deferred [ 37.631183] Modules linked in: x86_pkg_temp_thermal fuse [ 37.638654] RIP: 0010:__flush_work+0x2c2/0x2d0 [ 37.638655] Code: c6 00 31 c0 e9 71 ff ff ff 41 8b 0c 24 49 8b 54 24 08 83 e1 08 49 0f ba 2c 24 03 80 c9 f0 e9 d2 fe ff ff 0f 0b e9 50 ff ff ff <0f> 0b 31 c0 e9 47 ff ff ff e8 90 9d fd ff 0f 1f 44 00 00 55 31 f6 [ 37.643879] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.1.10-rc2 #1 [ 37.643880] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 37.649183] RSP: 0018:ffffb038c1a23ca0 EFLAGS: 00010246 [ 37.653630] Workqueue: events sk_psock_destroy_deferred [ 37.672375] RAX: 0000000000000000 RBX: ffff9e73d9492068 RCX: 0000000000000006 [ 37.672376] RDX: 0000000000000006 RSI: 0000000000000001 RDI: ffff9e73d9492068 [ 37.678805] RIP: 0010:__flush_work+0x2c2/0x2d0 [ 37.678807] Code: c6 00 31 c0 e9 71 ff ff ff 41 8b 0c 24 49 8b 54 24 08 83 e1 08 49 0f ba 2c 24 03 80 c9 f0 e9 d2 fe ff ff 0f 0b e9 50 ff ff ff <0f> 0b 31 c0 e9 47 ff ff ff e8 90 9d fd ff 0f 1f 44 00 00 55 31 f6 [ 37.686274] RBP: ffffb038c1a23d68 R08: 0000000000000000 R09: 0000000000000000 [ 37.686275] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9e73d9492068 [ 37.691494] RSP: 0018:ffffb038c18fbca0 EFLAGS: 00010246 [ 37.696720] R13: 0000000000000001 R14: ffffb038c1a23d98 R15: ffffffff9a490d40 [ 37.696721] FS: 0000000000000000(0000) GS:ffff9e73dfb80000(0000) knlGS:0000000000000000 [ 37.703851] RAX: 0000000000000000 RBX: ffff9e73d9490868 RCX: 0000000000000006 [ 37.703852] RDX: 0000000000000006 RSI: 0000000000000001 RDI: ffff9e73d9490868 [ 37.710976] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.710977] CR2: 00007f38680ca8a0 CR3: 00000002ee614006 CR4: 00000000003606e0 [ 37.715419] RBP: ffffb038c18fbd68 R08: 0000000000000000 R09: 0000000000000000 [ 37.715420] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9e73d9490868 [ 37.734156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.734157] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.741282] R13: 0000000000000001 R14: ffffb038c18fbd98 R15: ffffffff9a490d40 [ 37.741283] FS: 0000000000000000(0000) GS:ffff9e73dfa00000(0000) knlGS:0000000000000000 [ 37.748405] Call Trace: [ 37.748410] ? work_busy+0xc0/0xc0 [ 37.753621] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.753622] CR2: 00007f38680c9788 CR3: 000000045454a004 CR4: 00000000003606f0 [ 37.760746] ? mark_held_locks+0x4d/0x80 [ 37.768823] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.768824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.775946] ? __cancel_work_timer+0x11a/0x1d0 [ 37.783071] Call Trace: [ 37.783075] ? work_busy+0xc0/0xc0 [ 37.788808] ? cancel_delayed_work_sync+0x13/0x20 [ 37.788810] ? lockdep_hardirqs_on+0xf6/0x190 [ 37.795934] ? mark_held_locks+0x4d/0x80 [ 37.803055] ? __cancel_work_timer+0x11a/0x1d0 [ 37.803057] ? work_busy+0xc0/0xc0 [ 37.810179] ? __cancel_work_timer+0x11a/0x1d0 [ 37.817303] __cancel_work_timer+0x134/0x1d0 [ 37.824453] ? cancel_delayed_work_sync+0x13/0x20 [ 37.824455] ? lockdep_hardirqs_on+0xf6/0x190 [ 37.831579] cancel_delayed_work_sync+0x13/0x20 [ 37.839654] ? __cancel_work_timer+0x11a/0x1d0 [ 37.839657] ? work_busy+0xc0/0xc0 [ 37.842100] strp_done+0x1c/0x50 [ 37.845497] __cancel_work_timer+0x134/0x1d0 [ 37.851242] sk_psock_destroy_deferred+0x34/0x1c0 [ 37.858372] cancel_delayed_work_sync+0x13/0x20 [ 37.862292] process_one_work+0x281/0x610 [ 37.869415] strp_done+0x1c/0x50 [ 37.876540] worker_thread+0x3c/0x3f0 [ 37.880975] sk_psock_destroy_deferred+0x34/0x1c0 [ 37.883419] ? __kthread_parkme+0x61/0x90 [ 37.886819] process_one_work+0x281/0x610 [ 37.891514] kthread+0x12c/0x150 [ 37.895868] worker_thread+0x3c/0x3f0 [ 37.899783] ? process_one_work+0x610/0x610 [ 37.904221] kthread+0x12c/0x150 [ 37.907615] ? kthread_park+0x90/0x90 [ 37.907618] ret_from_fork+0x3a/0x50 [ 37.912052] ? process_one_work+0x610/0x610 [ 37.916355] irq event stamp: 57860 [ 37.921058] ? kthread_park+0x90/0x90 [ 37.921060] ret_from_fork+0x3a/0x50 [ 37.925407] hardirqs last enabled at (57859): [<ffffffff9a4949ba>] __cancel_work_timer+0x11a/0x1d0 [ 37.925409] hardirqs last disabled at (57860): [<ffffffff9a401bab>] trace_hardirqs_off_thunk+0x1a/0x1c [ 37.929944] irq event stamp: 47474 [ 37.934378] softirqs last enabled at (57812): [<ffffffff9add14d5>] release_sock+0x85/0xb0 [ 37.934379] softirqs last disabled at (57810): [<ffffffff9add140a>] __release_sock+0xda/0x120 [ 37.937773] hardirqs last enabled at (47473): [<ffffffff9a4949ba>] __cancel_work_timer+0x11a/0x1d0 [ 37.937775] hardirqs last disabled at (47474): [<ffffffff9a401bab>] trace_hardirqs_off_thunk+0x1a/0x1c [ 37.940998] ---[ end trace ae349dc9a55c8bc8 ]--- [ 37.941056] WARNING: CPU: 3 PID: 57 at /usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0 [ 37.945263] softirqs last enabled at (47440): [<ffffffff9add14d5>] release_sock+0x85/0xb0 [ 37.945264] softirqs last disabled at (47438): [<ffffffff9add140a>] __release_sock+0xda/0x120 [ 37.949968] Modules linked in: x86_pkg_temp_thermal fuse [ 37.954493] ---[ end trace ae349dc9a55c8bc9 ]--- [ 37.954522] WARNING: CPU: 0 PID: 5 at /usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0 [...] metadata: git branch: linux-5.1.y git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git commit: b7eabc3862b8717f2bcc47f3f3830ec575423c8c git describe: v5.1.9-157-gb7eabc3862b8 make_kernelversion: 5.1.10-rc2 kernel-config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkf… kernel-defconfig: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkf… build-url: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-5.1/DISTRO=lkft… build-location: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkf… toolchain: x86_64-linaro-linux 7.% series: lkft email-notification: '' kselftest__url: https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.1.tar.xz kselftest__version: '5.1' kselftest__revision: '5.1' Full test log, https://lkft.validation.linaro.org/scheduler/job/775857#L1114 Best regards Naresh Kamboju

6 years, 6 months

1
1
0 0

Fixing Python 3 syntax errors in tpm2_tests.py

by Christian Clauss

Hello, As my very first contribution to the Linux Kernel, I would like to fix six Python 3 syntax errors in the file ./tools/testing/selftests/tpm2/tpm2_tests.py All six of these errors are of the same form: except ProtocolError, e: To fix the syntax errors, I propose to change the comma (,) to “as” like: except ProtocolError as e: These changes are important because the current form is compatible with Python 2 but is a syntax error in Python 3. The proposed form is compatible with both Python 2 and Python3. This conversion is required because Python 2 will reach its end of life in less than 200 days. The kernel contains at least five other files where I am able to detect Python 3 syntax errors but after studying in detail the process of making kernel modification, I believe that it is best to start with tpm2_tests.py because the changes are straightforward and uncontroversial — all issues are of the same form, and I can detect no other issues (such as undefined names) to fix in that file. If I succeed in getting the modifications to tpm2_tests.py through the review process then I can try the remaining files in turn. I would be interested to know if this is a worthwhile effort. Is there already another initiative to resolve these issue before yearend? Thanks for any advise that you can provide, Chris Clauss

6 years, 6 months

2
1
0 0

[PATCH net-next v3 0/3] UDP GSO audit tests

by Fred Klassen

Updates to UDP GSO selftests ot optionally stress test CMSG subsytem, and report the reliability and performance of both TX Timestamping and ZEROCOPY messages. Fred Klassen (3): net/udpgso_bench_tx: options to exercise TX CMSG net/udpgso_bench.sh add UDP GSO audit tests net/udpgso_bench.sh test fails on error tools/testing/selftests/net/udpgso_bench.sh | 52 ++++- tools/testing/selftests/net/udpgso_bench_tx.c | 291 ++++++++++++++++++++++++-- 2 files changed, 327 insertions(+), 16 deletions(-) -- 2.11.0

6 years, 6 months

3
5
0 0

stable-rc: ptrace: peeksiginfo failed on 4.19, 4.14, 4.9 and 4.4

by Naresh Kamboju

selftests: ptrace: peeksiginfo failed on x86_64, i386, arm64 and arm. FAILED on stable rc branches 4.19, 4.14, 4.9 and 4.4. PASS on mainline, next and 5.1 stable rc branch. Test output: ------------------ cd /opt/kselftests/mainline/ptrace ./peeksiginfo Error (peeksiginfo.c:143): Only 0 signals were read The git bisect show that below commit caused this test to fail. git bisect bad 5b6b0eac235ef1f915f24eda6d501a754022cbf0 is the first bad commit commit 5b6b0eac235ef1f915f24eda6d501a754022cbf0 Author: Eric W. Biederman <ebiederm(a)xmission.com> Date: Tue May 28 18:46:37 2019 -0500 signal/ptrace: Don't leak unitialized kernel memory with PTRACE_PEEK_SIGINFO commit f6e2aa91a46d2bc79fce9b93a988dbe7655c90c0 upstream. Recently syzbot in conjunction with KMSAN reported that ptrace_peek_siginfo can copy an uninitialized siginfo to userspace. Inspecting ptrace_peek_siginfo confirms this. The problem is that off when initialized from args.off can be initialized to a negaive value. At which point the "if (off >= 0)" test to see if off became negative fails because off started off negative. Prevent the core problem by adding a variable found that is only true if a siginfo is found and copied to a temporary in preparation for being copied to userspace. Prevent args.off from being truncated when being assigned to off by testing that off is <= the maximum possible value of off. Convert off to an unsigned long so that we should not have to truncate args.off, we have well defined overflow behavior so if we add another check we won't risk fighting undefined compiler behavior, and so that we have a type whose maximum value is easy to test for. Cc: Andrei Vagin <avagin(a)gmail.com> Cc: stable(a)vger.kernel.org Reported-by: syzbot+0d602a1b0d8c95bdf299(a)syzkaller.appspotmail.com Fixes: 84c751bd4aeb ("ptrace: add ability to retrieve signals without removing from a queue (v4)") Signed-off-by: "Eric W. Biederman" <ebiederm(a)xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> :040000 040000 ff9f3109f210274d0b87851d226c35e7305ce44a b36de2c855fe2a0b332f145f0966dc1a0304d4bd M kernel Test case link, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/too… Test output log link, https://lkft.validation.linaro.org/scheduler/job/777223#L1084 Test results comparison on different branches, https://qa-reports.linaro.org/_/comparetest/?project=22&project=6&project=5… Best regards Naresh Kamboju

6 years, 6 months

4
3
0 0

BUG: kernel NULL pointer dereference, address: 00000000

by Naresh Kamboju

While running selftest bpf: test_sockmap the kernel BUG found on i386 and arm kernel running on Linux version 5.2.0-rc5-next-20190617 steps to reproduce, cd /opt/kselftests/default-in-kernel/bpf ./test_sockmap [ 33.666964] BUG: kernel NULL pointer dereference, address: 00000000 [ 33.673246] #PF: supervisor read access in kernel mode [ 33.678392] #PF: error_code(0x0000) - not-present page [ 33.683539] *pde = 00000000 [ 33.686435] Oops: 0000 [#1] SMP [ 33.689593] CPU: 1 PID: 619 Comm: test_sockmap Not tainted 5.2.0-rc5-next-20190617 #1 [ 33.697431] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 33.704914] EIP: memcpy+0x1d/0x30 [ 33.708240] Code: 59 58 eb 85 90 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 89 c7 53 89 d6 89 cb c1 e9 02 f3 a5 89 d9 83 e1 03 74 02 <f3> a4 5b 5e 5f 5d c3 8d b6 00 00 00 00 8d bf 00 00 00 00 3e 8d 74 [ 33.726985] EAX: f1faf000 EBX: 00000001 ECX: 00000001 EDX: 00000000 [ 33.733249] ESI: 00000000 EDI: f1faf000 EBP: f2e6d99c ESP: f2e6d990 [ 33.739505] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202 [ 33.746283] CR0: 80050033 CR2: 00000000 CR3: 31fae000 CR4: 003406d0 [ 33.752542] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 33.758807] DR6: fffe0ff0 DR7: 00000400 [ 33.762638] Call Trace: [ 33.765084] bpf_msg_push_data+0x635/0x660 [ 33.769183] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 33.774150] ? lockdep_hardirqs_on+0xec/0x1a0 [ 33.778512] ___bpf_prog_run+0xa0d/0x15a0 [ 33.782523] ? __lock_acquire+0x1fe/0x1ec0 [ 33.786621] __bpf_prog_run32+0x4b/0x70 [ 33.790462] ? sk_psock_msg_verdict+0x5/0x290 [ 33.794819] sk_psock_msg_verdict+0xad/0x290 [ 33.799091] ? sk_psock_msg_verdict+0xad/0x290 [ 33.803537] ? lockdep_hardirqs_on+0xec/0x1a0 [ 33.807887] ? __local_bh_enable_ip+0x78/0xf0 [ 33.812238] tcp_bpf_send_verdict+0x29c/0x3b0 [ 33.816590] tcp_bpf_sendpage+0x233/0x3d0 [ 33.820603] ? __lock_acquire+0x1fe/0x1ec0 [ 33.824703] ? __lock_acquire+0x1fe/0x1ec0 [ 33.828801] ? find_held_lock+0x27/0xa0 [ 33.832640] ? lock_release+0x92/0x290 [ 33.836392] ? find_get_entry+0x136/0x300 [ 33.840397] ? touch_atime+0x34/0xd0 [ 33.843978] ? copy_page_to_iter+0x245/0x400 [ 33.848248] ? lockdep_hardirqs_on+0xec/0x1a0 [ 33.852600] ? tcp_bpf_send_verdict+0x3b0/0x3b0 [ 33.857132] inet_sendpage+0x53/0x1f0 [ 33.860789] ? inet_recvmsg+0x1e0/0x1e0 [ 33.864620] ? kernel_sendpage+0x40/0x40 [ 33.868536] kernel_sendpage+0x1e/0x40 [ 33.872282] sock_sendpage+0x24/0x30 [ 33.875861] pipe_to_sendpage+0x59/0xa0 [ 33.879692] ? direct_splice_actor+0x40/0x40 [ 33.883962] __splice_from_pipe+0xde/0x1c0 [ 33.888055] ? direct_splice_actor+0x40/0x40 [ 33.892342] ? direct_splice_actor+0x40/0x40 [ 33.896635] splice_from_pipe+0x59/0x80 [ 33.900466] ? splice_from_pipe+0x80/0x80 [ 33.904469] ? generic_splice_sendpage+0x20/0x20 [ 33.909080] generic_splice_sendpage+0x18/0x20 [ 33.913516] ? direct_splice_actor+0x40/0x40 [ 33.917782] direct_splice_actor+0x2d/0x40 [ 33.921880] splice_direct_to_actor+0x127/0x240 [ 33.926403] ? generic_pipe_buf_nosteal+0x10/0x10 [ 33.931105] do_splice_direct+0x7e/0xc0 [ 33.934944] do_sendfile+0x20d/0x3e0 [ 33.938522] sys_sendfile+0xac/0xd0 [ 33.942015] do_fast_syscall_32+0x8e/0x320 [ 33.946114] entry_SYSENTER_32+0x70/0xc8 [ 33.950039] EIP: 0xb7fa67a1 [ 33.952830] Code: 8b 98 60 cd ff ff 85 d2 89 c8 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 1c 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 [ 33.971567] EAX: ffffffda EBX: 00000018 ECX: 0000001c EDX: 00000000 [ 33.977823] ESI: 00000001 EDI: 00000018 EBP: 00000001 ESP: bfcaa6d4 [ 33.984083] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000206 [ 33.990869] Modules linked in: x86_pkg_temp_thermal fuse [ 33.996181] CR2: 0000000000000000 [ 33.999500] ---[ end trace 0ef7a1496c65bde8 ]--- - Naresh

6 years, 6 months

1
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[PATCH v4 00/18] kunit: introduce KUnit, the Linux kernel unit testing framework

by Brendan Higgins

## TLDR A quick follow up to yesterday's revision. I got some feedback that I wanted to incorporate before anyone else read the update. For this reason, I will leave a TLDR of the biggest changes since v2. Biggest things to look out for (since v2): - KUnit core now outputs results in TAP14. - Heavily reworked tools/testing/kunit/kunit.py - Changed how parsing works. - Added testing. - Greg, Logan, you might want to re-review this. - Added documentation on how to use KUnit on non-UML kernels. You can see the docs rendered here[1]. There is still some discussion going on on the [PATCH v2 00/17] thread, but I wanted to get some of these updates out before they got too stale (and too difficult for me to keep track of). I hope no one minds. ## Background This patch set proposes KUnit, a lightweight unit testing and mocking framework for the Linux kernel. Unlike Autotest and kselftest, KUnit is a true unit testing framework; it does not require installing the kernel on a test machine or in a VM (however, KUnit still allows you to run tests on test machines or in VMs if you want) and does not require tests to be written in userspace running on a host kernel. Additionally, KUnit is fast: From invocation to completion KUnit can run several dozen tests in under a second. Currently, the entire KUnit test suite for KUnit runs in under a second from the initial invocation (build time excluded). KUnit is heavily inspired by JUnit, Python's unittest.mock, and Googletest/Googlemock for C++. KUnit provides facilities for defining unit test cases, grouping related test cases into test suites, providing common infrastructure for running tests, mocking, spying, and much more. ## What's so special about unit testing? A unit test is supposed to test a single unit of code in isolation, hence the name. There should be no dependencies outside the control of the test; this means no external dependencies, which makes tests orders of magnitudes faster. Likewise, since there are no external dependencies, there are no hoops to jump through to run the tests. Additionally, this makes unit tests deterministic: a failing unit test always indicates a problem. Finally, because unit tests necessarily have finer granularity, they are able to test all code paths easily solving the classic problem of difficulty in exercising error handling code. ## Is KUnit trying to replace other testing frameworks for the kernel? No. Most existing tests for the Linux kernel are end-to-end tests, which have their place. A well tested system has lots of unit tests, a reasonable number of integration tests, and some end-to-end tests. KUnit is just trying to address the unit test space which is currently not being addressed. ## More information on KUnit There is a bunch of documentation near the end of this patch set that describes how to use KUnit and best practices for writing unit tests. For convenience I am hosting the compiled docs here[2]. Additionally for convenience, I have applied these patches to a branch[3]. The repo may be cloned with: git clone https://kunit.googlesource.com/linux This patchset is on the kunit/rfc/v5.1/v4 branch. ## Changes Since Last Version As I mentioned above, there are a significant number of updates since v2: - Converted KUnit core to print test results in TAP14 format as suggested by Greg and Frank. - Heavily reworked tools/testing/kunit/kunit.py - Changed how parsing works. - Added testing. - Added documentation on how to use KUnit on non-UML kernels. You can see the docs rendered here[1]. - Added a new set of EXPECTs and ASSERTs for pointer comparison. - Removed more function indirection as suggested by Logan. - Added a new patch that adds `kunit_try_catch_throw` to objtool's noreturn list. - Fixed a number of minorish issues pointed out by Shuah, Masahiro, and kbuild bot. Nevertheless, there are only a couple of minor updates since v3: - Added more context to the changelog on the objtool patch, as per Peter's request. - Moved all KUnit documentation under the Documentation/dev-tools/ directory as per Jonathan's suggestion. [1] https://google.github.io/kunit-docs/third_party/kernel/docs/usage.html#kuni… [2] https://google.github.io/kunit-docs/third_party/kernel/docs/ [3] https://kunit.googlesource.com/linux/+/kunit/rfc/v5.1/v4 -- 2.21.0.1020.gf2820cf01a-goog

6 years, 6 months

3
35
0 0

[PATCH] selftests/bpf: signedness bug in enable_all_controllers()

by Dan Carpenter

The "len" variable needs to be signed for the error handling to work properly. Fixes: 596092ef8bea ("selftests/bpf: enable all available cgroup v2 controllers") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> --- tools/testing/selftests/bpf/cgroup_helpers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/cgroup_helpers.c b/tools/testing/selftests/bpf/cgroup_helpers.c index 0d89f0396be4..e95c33e333a4 100644 --- a/tools/testing/selftests/bpf/cgroup_helpers.c +++ b/tools/testing/selftests/bpf/cgroup_helpers.c @@ -47,7 +47,7 @@ int enable_all_controllers(char *cgroup_path) char buf[PATH_MAX]; char *c, *c2; int fd, cfd; - size_t len; + ssize_t len; snprintf(path, sizeof(path), "%s/cgroup.controllers", cgroup_path); fd = open(path, O_RDONLY); -- 2.20.1

6 years, 6 months

3
2
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[PATCH AUTOSEL 4.19 20/39] selftests: vm: install test_vmalloc.sh for run_vmtests

by Sasha Levin

From: Naresh Kamboju <naresh.kamboju(a)linaro.org> [ Upstream commit bc2cce3f2ebcae02aa4bb29e3436bf75ee674c32 ] Add test_vmalloc.sh to TEST_FILES to make sure it gets installed for run_vmtests. Fixed below error: ./run_vmtests: line 217: ./test_vmalloc.sh: No such file or directory Tested with: make TARGETS=vm install INSTALL_PATH=$PWD/x Signed-off-by: Naresh Kamboju <naresh.kamboju(a)linaro.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/vm/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index dc68340a6a96..2cf3dc49bd03 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -24,6 +24,8 @@ TEST_GEN_FILES += virtual_address_range TEST_PROGS := run_vmtests +TEST_FILES := test_vmalloc.sh + KSFT_KHDR_INSTALL := 1 include ../lib.mk -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 4.19 19/39] kselftest/cgroup: fix incorrect test_core skip

by Sasha Levin

From: Alex Shi <alex.shi(a)linux.alibaba.com> [ Upstream commit f97f3f8839eb9de5843066d80819884f7722c8c5 ] The test_core will skip the test_cgcore_no_internal_process_constraint_on_threads test case if the 'cpu' controller missing in root's subtree_control. In fact we need to set the 'cpu' in subtree_control, to make the testing meaningful. ./test_core ... ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads ... Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index d78f1c5366d3..79053a4f4783 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -198,7 +198,7 @@ static int test_cgcore_no_internal_process_constraint_on_threads(const char *roo char *parent = NULL, *child = NULL; if (cg_read_strstr(root, "cgroup.controllers", "cpu") || - cg_read_strstr(root, "cgroup.subtree_control", "cpu")) { + cg_write(root, "cgroup.subtree_control", "+cpu")) { ret = KSFT_SKIP; goto cleanup; } -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 4.19 18/39] kselftest/cgroup: fix unexpected testing failure on test_core

by Sasha Levin

From: Alex Shi <alex.shi(a)linux.alibaba.com> [ Upstream commit 00e38a5d753d7788852f81703db804a60a84c26e ] The cgroup testing relys on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, some test cases will be failed as following: $sudo ./test_core not ok 1 test_cgcore_internal_process_constraint ok 2 test_cgcore_top_down_constraint_enable not ok 3 test_cgcore_top_down_constraint_disable ... To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index be59f9c34ea2..d78f1c5366d3 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -376,6 +376,11 @@ int main(int argc, char *argv[]) if (cg_find_unified_root(root, sizeof(root))) ksft_exit_skip("cgroup v2 isn't mounted\n"); + + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 4.19 17/39] kselftest/cgroup: fix unexpected testing failure on test_memcontrol

by Sasha Levin

From: Alex Shi <alex.shi(a)linux.alibaba.com> [ Upstream commit f6131f28057d4fd8922599339e701a2504e0f23d ] The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..c19a97dd02d4 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 5.1 40/59] selftests: set sysctl bc_forwarding properly in router_broadcast.sh

by Sasha Levin

From: Xin Long <lucien.xin(a)gmail.com> [ Upstream commit 67c0aaa1eaec60e9dab301012bdebe6726ae04bd ] sysctl setting bc_forwarding for $rp2 is needed when ping_test_from h2, otherwise the bc packets from $rp2 won't be forwarded. This patch is to add this setting for $rp2. Also, as ping_test_from does grep "$from" only, which could match some unexpected output, some test case doesn't really work, like: # ping_test_from $h2 198.51.200.255 198.51.200.2 PING 198.51.200.255 from 198.51.100.2 veth3: 56(84) bytes of data. 64 bytes from 198.51.100.1: icmp_seq=1 ttl=64 time=0.336 ms When doing grep $form (198.51.200.2), the output could still match. So change to grep "bytes from $from" instead. Fixes: 40f98b9af943 ("selftests: add a selftest for directed broadcast forwarding") Signed-off-by: Xin Long <lucien.xin(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/forwarding/router_broadcast.sh | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/forwarding/router_broadcast.sh b/tools/testing/selftests/net/forwarding/router_broadcast.sh index 9a678ece32b4..4eac0a06f451 100755 --- a/tools/testing/selftests/net/forwarding/router_broadcast.sh +++ b/tools/testing/selftests/net/forwarding/router_broadcast.sh @@ -145,16 +145,19 @@ bc_forwarding_disable() { sysctl_set net.ipv4.conf.all.bc_forwarding 0 sysctl_set net.ipv4.conf.$rp1.bc_forwarding 0 + sysctl_set net.ipv4.conf.$rp2.bc_forwarding 0 } bc_forwarding_enable() { sysctl_set net.ipv4.conf.all.bc_forwarding 1 sysctl_set net.ipv4.conf.$rp1.bc_forwarding 1 + sysctl_set net.ipv4.conf.$rp2.bc_forwarding 1 } bc_forwarding_restore() { + sysctl_restore net.ipv4.conf.$rp2.bc_forwarding sysctl_restore net.ipv4.conf.$rp1.bc_forwarding sysctl_restore net.ipv4.conf.all.bc_forwarding } @@ -171,7 +174,7 @@ ping_test_from() log_info "ping $dip, expected reply from $from" ip vrf exec $(master_name_get $oif) \ $PING -I $oif $dip -c 10 -i 0.1 -w $PING_TIMEOUT -b 2>&1 \ - | grep $from &> /dev/null + | grep "bytes from $from" > /dev/null check_err_fail $fail $? } -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 5.1 32/59] selftests: vm: install test_vmalloc.sh for run_vmtests

by Sasha Levin

From: Naresh Kamboju <naresh.kamboju(a)linaro.org> [ Upstream commit bc2cce3f2ebcae02aa4bb29e3436bf75ee674c32 ] Add test_vmalloc.sh to TEST_FILES to make sure it gets installed for run_vmtests. Fixed below error: ./run_vmtests: line 217: ./test_vmalloc.sh: No such file or directory Tested with: make TARGETS=vm install INSTALL_PATH=$PWD/x Signed-off-by: Naresh Kamboju <naresh.kamboju(a)linaro.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/vm/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index e13eb6cc8901..05306c58ff9f 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -25,6 +25,8 @@ TEST_GEN_FILES += virtual_address_range TEST_PROGS := run_vmtests +TEST_FILES := test_vmalloc.sh + KSFT_KHDR_INSTALL := 1 include ../lib.mk -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 5.1 31/59] userfaultfd: selftest: fix compiler warning

by Sasha Levin

From: Alakesh Haloi <alakesh.haloi(a)gmail.com> [ Upstream commit 98a13a8d253999cf25eb16d901c35fbd2a8455c4 ] Fixes following compiler warning userfaultfd.c: In function ‘usage’: userfaultfd.c:126:2: warning: format not a string literal and no format arguments [-Wformat-security] fprintf(stderr, examples); Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> Reviewed-by: Peter Xu <peterx(a)redhat.com> Reviewed-by: Mike Rapoport <rppt(a)linux.ibm.com> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/vm/userfaultfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 5d1db824f73a..b3e6497b080c 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -123,7 +123,7 @@ static void usage(void) fprintf(stderr, "Supported <test type>: anon, hugetlb, " "hugetlb_shared, shmem\n\n"); fprintf(stderr, "Examples:\n\n"); - fprintf(stderr, examples); + fprintf(stderr, "%s", examples); exit(1); } -- 2.20.1

6 years, 6 months

1
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[PATCH AUTOSEL 5.1 30/59] kselftest/cgroup: fix incorrect test_core skip

by Sasha Levin

From: Alex Shi <alex.shi(a)linux.alibaba.com> [ Upstream commit f97f3f8839eb9de5843066d80819884f7722c8c5 ] The test_core will skip the test_cgcore_no_internal_process_constraint_on_threads test case if the 'cpu' controller missing in root's subtree_control. In fact we need to set the 'cpu' in subtree_control, to make the testing meaningful. ./test_core ... ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads ... Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index d78f1c5366d3..79053a4f4783 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -198,7 +198,7 @@ static int test_cgcore_no_internal_process_constraint_on_threads(const char *roo char *parent = NULL, *child = NULL; if (cg_read_strstr(root, "cgroup.controllers", "cpu") || - cg_read_strstr(root, "cgroup.subtree_control", "cpu")) { + cg_write(root, "cgroup.subtree_control", "+cpu")) { ret = KSFT_SKIP; goto cleanup; } -- 2.20.1

6 years, 6 months

1
0
0 0

[PATCH AUTOSEL 5.1 29/59] kselftest/cgroup: fix unexpected testing failure on test_core

by Sasha Levin

From: Alex Shi <alex.shi(a)linux.alibaba.com> [ Upstream commit 00e38a5d753d7788852f81703db804a60a84c26e ] The cgroup testing relys on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, some test cases will be failed as following: $sudo ./test_core not ok 1 test_cgcore_internal_process_constraint ok 2 test_cgcore_top_down_constraint_enable not ok 3 test_cgcore_top_down_constraint_disable ... To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index be59f9c34ea2..d78f1c5366d3 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -376,6 +376,11 @@ int main(int argc, char *argv[]) if (cg_find_unified_root(root, sizeof(root))) ksft_exit_skip("cgroup v2 isn't mounted\n"); + + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 6 months

1
0
0 0

[PATCH AUTOSEL 5.1 28/59] kselftest/cgroup: fix unexpected testing failure on test_memcontrol

by Sasha Levin

From: Alex Shi <alex.shi(a)linux.alibaba.com> [ Upstream commit f6131f28057d4fd8922599339e701a2504e0f23d ] The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..c19a97dd02d4 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.20.1

6 years, 6 months

1
0
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[PATCH net-next v2 0/3] UDP GSO audit tests

by Fred Klassen

Updates to UDP GSO selftests ot optionally stress test CMSG subsytem, and report the reliability and performance of both TX Timestamping and ZEROCOPY messages. Fred Klassen (3): net/udpgso_bench_tx: options to exercise TX CMSG net/udpgso_bench.sh add UDP GSO audit tests net/udpgso_bench.sh test fails on error tools/testing/selftests/net/udpgso_bench.sh | 51 +++- tools/testing/selftests/net/udpgso_bench_tx.c | 324 ++++++++++++++++++++++++-- 2 files changed, 357 insertions(+), 18 deletions(-) -- 2.11.0

6 years, 6 months

2
8
0 0

kselftest build broken?

by Dmitry Vyukov

Hi, I've tried to build kselftests for several years now, but I always find the build broken. Which makes me wonder if the instructions are broken or something. I follow the instructions in Documentation/dev-tools/kselftest.rst and start with "make -C tools/testing/selftests". Here is the errors I get on the upstream commit 16d72dd4891fecc1e1bf7ca193bb7d5b9804c038: error: unable to create target: 'No available targets are compatible with triple "bpf"' 1 error generated. Makefile:259: recipe for target 'elfdep' failed Makefile:156: recipe for target 'all' failed Makefile:106: recipe for target '/linux/tools/testing/selftests/bpf/libbpf.a' failed test_execve.c:4:10: fatal error: cap-ng.h: No such file or directory ../lib.mk:138: recipe for target '/linux/tools/testing/selftests/capabilities/test_execve' failed gpio-mockup-chardev.c:20:10: fatal error: libmount.h: No such file or directory <builtin>: recipe for target 'gpio-mockup-chardev' failed fuse_mnt.c:17:10: fatal error: fuse.h: No such file or directory ../lib.mk:138: recipe for target '/linux/tools/testing/selftests/memfd/fuse_mnt' failed collect2: error: ld returned 1 exit status ../lib.mk:138: recipe for target '/linux/tools/testing/selftests/mqueue/mq_open_tests' failed reuseport_bpf_numa.c:24:10: fatal error: numa.h: No such file or directory ../lib.mk:138: recipe for target '/linux/tools/testing/selftests/net/reuseport_bpf_numa' failed mlock-random-test.c:8:10: fatal error: sys/capability.h: No such file or directory ../lib.mk:138: recipe for target '/linux/tools/testing/selftests/vm/mlock-random-test' failed Here is full log: https://gist.githubusercontent.com/dvyukov/47430636e160f297b657df5ba2efa82b… I have libelf-dev installed. Do I need to install something else? Or run some other command? Thanks

6 years, 6 months

4
19
0 0

[PATCH] bpf: selftests: Fix warning in flow_dissector

by Arthur Fabre

Building the userspace part of the flow_dissector resulted in: prog_tests/flow_dissector.c: In function ‘tx_tap’: prog_tests/flow_dissector.c:176:9: warning: implicit declaration of function ‘writev’; did you mean ‘write’? [-Wimplicit-function-declaration] return writev(fd, iov, ARRAY_SIZE(iov)); ^~~~~~ write Include <sys/uio.h> to fix this. Signed-off-by: Arthur Fabre <afabre(a)cloudflare.com> --- tools/testing/selftests/bpf/prog_tests/flow_dissector.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c index fbd1d88a6095..c938283ac232 100644 --- a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c +++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c @@ -3,6 +3,7 @@ #include <error.h> #include <linux/if.h> #include <linux/if_tun.h> +#include <sys/uio.h> #define CHECK_FLOW_KEYS(desc, got, expected) \ CHECK_ATTR(memcmp(&got, &expected, sizeof(got)) != 0, \ -- 2.20.1

6 years, 6 months

2
2
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[PATCH v5 00/10] Support using MSI interrupts in ntb_transport

by Logan Gunthorpe

This is another resend as there has been no feedback since v4. Seems Jon has been MIA this past cycle so hopefully he appears on the list soon. I've addressed the feedback so far and rebased on the latest kernel and would like this to be considered for merging this cycle. The only outstanding issue I know of is that it still will not work with IDT hardware, but ntb_transport doesn't work with IDT hardware and there is still no sensible common infrastructure to support ntb_peer_mw_set_trans(). Thus, I decline to consider that complication in this patchset. However, I'll be happy to review work that adds this feature in the future. Also, as the port number and resource index stuff is a bit complicated, I made a quick out of tree test fixture to ensure it's correct[1]. As an excerise I also wrote some test code[2] using the upcomming KUnit feature. Logan [1] https://repl.it/repls/ExcitingPresentFile [2] https://github.com/sbates130272/linux-p2pmem/commits/ntb_kunit -- Changes in v5: * Rebased onto v5.2-rc1 (plus the patches in ntb-next) -- Changes in v4: * Rebased onto v5.1-rc6 (No changes) * Numerous grammar and spelling mistakes spotted by Bjorn -- Changes in v3: * Rebased onto v5.1-rc1 (Dropped the first two patches as they have been merged, and cleaned up some minor conflicts in the PCI tree) * Added a new patch (#3) to calculate logical port numbers that are port numbers from 0 to (number of ports - 1). This is then used in ntb_peer_resource_idx() to fix the issues brought up by Serge. * Fixed missing __iomem and iowrite calls (as noticed by Serge) * Added patch 10 which describes ntb_msi_test in the documentation file (as requested by Serge) * A couple other minor nits and documentation fixes -- Changes in v2: * Cleaned up the changes in intel_irq_remapping.c to make them less confusing and add a comment. (Per discussion with Jacob and Joerg) * Fixed a nit from Bjorn and collected his Ack * Added a Kconfig dependancy on CONFIG_PCI_MSI for CONFIG_NTB_MSI as the Kbuild robot hit a random config that didn't build without it. * Worked in a callback for when the MSI descriptor changes so that the clients can resend the new address and data values to the peer. On my test system this was never necessary, but there may be other platforms where this can occur. I tested this by hacking in a path to rewrite the MSI descriptor when I change the cpu affinity of an IRQ. There's a bit of uncertainty over the latency of the change, but without hardware this can acctually occur on we can't test this. This was the result of a discussion with Dave. -- This patch series adds optional support for using MSI interrupts instead of NTB doorbells in ntb_transport. This is desirable seeing doorbells on current hardware are quite slow and therefore switching to MSI interrupts provides a significant performance gain. On switchtec hardware, a simple apples-to-apples comparison shows ntb_netdev/iperf numbers going from 3.88Gb/s to 14.1Gb/s when switching to MSI interrupts. To do this, a couple changes are required outside of the NTB tree: 1) The IOMMU must know to accept MSI requests from aliased bused numbers seeing NTB hardware typically sends proxied request IDs through additional requester IDs. The first patch in this series adds support for the Intel IOMMU. A quirk to add these aliases for switchtec hardware was already accepted. See commit ad281ecf1c7d ("PCI: Add DMA alias quirk for Microsemi Switchtec NTB") for a description of NTB proxy IDs and why this is necessary. 2) NTB transport (and other clients) may often need more MSI interrupts than the NTB hardware actually advertises support for. However, seeing these interrupts will not be triggered by the hardware but through an NTB memory window, the hardware does not actually need support or need to know about them. Therefore we add the concept of Virtual MSI interrupts which are allocated just like any other MSI interrupt but are not programmed into the hardware's MSI table. This is done in Patch 2 and then made use of in Patch 3. The remaining patches in this series add a library for dealing with MSI interrupts, a test client and finally support in ntb_transport. The series is based off of v5.1-rc6 plus the patches in ntb-next. A git repo is available here: https://github.com/sbates130272/linux-p2pmem/ ntb_transport_msi_v4 Thanks, Logan -- Logan Gunthorpe (10): PCI/MSI: Support allocating virtual MSI interrupts PCI/switchtec: Add module parameter to request more interrupts NTB: Introduce helper functions to calculate logical port number NTB: Introduce functions to calculate multi-port resource index NTB: Rename ntb.c to support multiple source files in the module NTB: Introduce MSI library NTB: Introduce NTB MSI Test Client NTB: Add ntb_msi_test support to ntb_test NTB: Add MSI interrupt support to ntb_transport NTB: Describe the ntb_msi_test client in the documentation. Documentation/ntb.txt | 27 ++ drivers/ntb/Kconfig | 11 + drivers/ntb/Makefile | 3 + drivers/ntb/{ntb.c => core.c} | 0 drivers/ntb/msi.c | 415 +++++++++++++++++++++++ drivers/ntb/ntb_transport.c | 169 ++++++++- drivers/ntb/test/Kconfig | 9 + drivers/ntb/test/Makefile | 1 + drivers/ntb/test/ntb_msi_test.c | 433 ++++++++++++++++++++++++ drivers/pci/msi.c | 54 ++- drivers/pci/switch/switchtec.c | 12 +- include/linux/msi.h | 8 + include/linux/ntb.h | 196 ++++++++++- include/linux/pci.h | 9 + tools/testing/selftests/ntb/ntb_test.sh | 54 ++- 15 files changed, 1386 insertions(+), 15 deletions(-) rename drivers/ntb/{ntb.c => core.c} (100%) create mode 100644 drivers/ntb/msi.c create mode 100644 drivers/ntb/test/ntb_msi_test.c -- 2.20.1

6 years, 6 months

2
12
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[PATCH v4 0/3] Fix vDSO clock_getres()

by Vincenzo Frascino

clock_getres in the vDSO library has to preserve the same behaviour of posix_get_hrtimer_res(). In particular, posix_get_hrtimer_res() does: sec = 0; ns = hrtimer_resolution; and hrtimer_resolution depends on the enablement of the high resolution timers that can happen either at compile or at run time. A possible fix is to change the vdso implementation of clock_getres, keeping a copy of hrtimer_resolution in vdso data and using that directly [1]. This patchset implements the proposed fix for arm64, powerpc, s390, nds32 and adds a test to verify that the syscall and the vdso library implementation of clock_getres return the same values. Even if these patches are unified by the same topic, there is no dependency between them, hence they can be merged singularly by each arch maintainer. Note: arm64 and nds32 respective fixes have been merged in 5.2-rc1, hence they have been removed from this series. [1] https://marc.info/?l=linux-arm-kernel&m=155110381930196&w=2 Changes: -------- v4: - Address review comments. v3: - Rebased on 5.2-rc1. - Address review comments. v2: - Rebased on 5.1-rc5. - Addressed review comments. Cc: Christophe Leroy <christophe.leroy(a)c-s.fr> Cc: Benjamin Herrenschmidt <benh(a)kernel.crashing.org> Cc: Paul Mackerras <paulus(a)samba.org> Cc: Michael Ellerman <mpe(a)ellerman.id.au> Cc: Martin Schwidefsky <schwidefsky(a)de.ibm.com> Cc: Heiko Carstens <heiko.carstens(a)de.ibm.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Vincenzo Frascino (3): powerpc: Fix vDSO clock_getres() s390: Fix vDSO clock_getres() kselftest: Extend vDSO selftest to clock_getres arch/powerpc/include/asm/vdso_datapage.h | 2 + arch/powerpc/kernel/asm-offsets.c | 2 +- arch/powerpc/kernel/time.c | 1 + arch/powerpc/kernel/vdso32/gettimeofday.S | 7 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 7 +- arch/s390/include/asm/vdso.h | 1 + arch/s390/kernel/asm-offsets.c | 2 +- arch/s390/kernel/time.c | 1 + arch/s390/kernel/vdso32/clock_getres.S | 12 +- arch/s390/kernel/vdso64/clock_getres.S | 10 +- tools/testing/selftests/vDSO/Makefile | 2 + .../selftests/vDSO/vdso_clock_getres.c | 124 ++++++++++++++++++ 12 files changed, 155 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/vDSO/vdso_clock_getres.c -- 2.21.0

6 years, 6 months

3
14
0 0

[PATCH] selftests/net: skip psock_tpacket test if KALLSYMS was not enabled

by Po-Hsu Lin

The psock_tpacket test will need to access /proc/kallsyms, this would require the kernel config CONFIG_KALLSYMS to be enabled first. Check the file existence to determine if we can run this test. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> --- tools/testing/selftests/net/run_afpackettests | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/net/run_afpackettests b/tools/testing/selftests/net/run_afpackettests index ea5938e..8b42e8b 100755 --- a/tools/testing/selftests/net/run_afpackettests +++ b/tools/testing/selftests/net/run_afpackettests @@ -21,12 +21,16 @@ fi echo "--------------------" echo "running psock_tpacket test" echo "--------------------" -./in_netns.sh ./psock_tpacket -if [ $? -ne 0 ]; then - echo "[FAIL]" - ret=1 +if [ -f /proc/kallsyms ]; then + ./in_netns.sh ./psock_tpacket + if [ $? -ne 0 ]; then + echo "[FAIL]" + ret=1 + else + echo "[PASS]" + fi else - echo "[PASS]" + echo "[SKIP] CONFIG_KALLSYMS not enabled" fi echo "--------------------" -- 2.7.4

6 years, 6 months

2
2
0 0

[PATCH v16 00/16] arm64: untag user pointers passed to the kernel

by Andrey Konovalov

=== Overview arm64 has a feature called Top Byte Ignore, which allows to embed pointer tags into the top byte of each pointer. Userspace programs (such as HWASan, a memory debugging tool [1]) might use this feature and pass tagged user pointers to the kernel through syscalls or other interfaces. Right now the kernel is already able to handle user faults with tagged pointers, due to these patches: 1. 81cddd65 ("arm64: traps: fix userspace cache maintenance emulation on a tagged pointer") 2. 7dcd9dd8 ("arm64: hw_breakpoint: fix watchpoint matching for tagged pointers") 3. 276e9327 ("arm64: entry: improve data abort handling of tagged pointers") This patchset extends tagged pointer support to syscall arguments. As per the proposed ABI change [3], tagged pointers are only allowed to be passed to syscalls when they point to memory ranges obtained by anonymous mmap() or sbrk() (see the patchset [3] for more details). For non-memory syscalls this is done by untaging user pointers when the kernel performs pointer checking to find out whether the pointer comes from userspace (most notably in access_ok). The untagging is done only when the pointer is being checked, the tag is preserved as the pointer makes its way through the kernel and stays tagged when the kernel dereferences the pointer when perfoming user memory accesses. Memory syscalls (mprotect, etc.) don't do user memory accesses but rather deal with memory ranges, and untagged pointers are better suited to describe memory ranges internally. Thus for memory syscalls we untag pointers completely when they enter the kernel. === Other approaches One of the alternative approaches to untagging that was considered is to completely strip the pointer tag as the pointer enters the kernel with some kind of a syscall wrapper, but that won't work with the countless number of different ioctl calls. With this approach we would need a custom wrapper for each ioctl variation, which doesn't seem practical. An alternative approach to untagging pointers in memory syscalls prologues is to inspead allow tagged pointers to be passed to find_vma() (and other vma related functions) and untag them there. Unfortunately, a lot of find_vma() callers then compare or subtract the returned vma start and end fields against the pointer that was being searched. Thus this approach would still require changing all find_vma() callers. === Testing The following testing approaches has been taken to find potential issues with user pointer untagging: 1. Static testing (with sparse [2] and separately with a custom static analyzer based on Clang) to track casts of __user pointers to integer types to find places where untagging needs to be done. 2. Static testing with grep to find parts of the kernel that call find_vma() (and other similar functions) or directly compare against vm_start/vm_end fields of vma. 3. Static testing with grep to find parts of the kernel that compare user pointers with TASK_SIZE or other similar consts and macros. 4. Dynamic testing: adding BUG_ON(has_tag(addr)) to find_vma() and running a modified syzkaller version that passes tagged pointers to the kernel. Based on the results of the testing the requried patches have been added to the patchset. === Notes This patchset is meant to be merged together with "arm64 relaxed ABI" [3]. This patchset is a prerequisite for ARM's memory tagging hardware feature support [4]. This patchset has been merged into the Pixel 2 & 3 kernel trees and is now being used to enable testing of Pixel phones with HWASan. Thanks! [1] http://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html [2] https://github.com/lucvoo/sparse-dev/commit/5f960cb10f56ec2017c128ef9d16060… [3] https://lkml.org/lkml/2019/3/18/819 [4] https://community.arm.com/processors/b/blog/posts/arm-a-profile-architectur… Changes in v16: - Moved untagging for memory syscalls from arm64 wrappers back to generic code. - Dropped untagging for the following memory syscalls: brk, mmap, munmap; mremap (only dropped for new_address); mmap_pgoff (not used on arm64); remap_file_pages (deprecated); shmat, shmdt (work on shared memory). - Changed kselftest to LD_PRELOAD a shared library that overrides malloc to return tagged pointers. - Rebased onto 5.2-rc3. Changes in v15: - Removed unnecessary untagging from radeon_ttm_tt_set_userptr(). - Removed unnecessary untagging from amdgpu_ttm_tt_set_userptr(). - Moved untagging to validate_range() in userfaultfd code. - Moved untagging to ib_uverbs_(re)reg_mr() from mlx4_get_umem_mr(). - Rebased onto 5.1. Changes in v14: - Moved untagging for most memory syscalls to an arm64 specific implementation, instead of doing that in the common code. - Dropped "net, arm64: untag user pointers in tcp_zerocopy_receive", since the provided user pointers don't come from an anonymous map and thus are not covered by this ABI relaxation. - Dropped "kernel, arm64: untag user pointers in prctl_set_mm*". - Moved untagging from __check_mem_type() to tee_shm_register(). - Updated untagging for the amdgpu and radeon drivers to cover the MMU notifier, as suggested by Felix. - Since this ABI relaxation doesn't actually allow tagged instruction pointers, dropped the following patches: - Dropped "tracing, arm64: untag user pointers in seq_print_user_ip". - Dropped "uprobes, arm64: untag user pointers in find_active_uprobe". - Dropped "bpf, arm64: untag user pointers in stack_map_get_build_id_offset". - Rebased onto 5.1-rc7 (37624b58). Changes in v13: - Simplified untagging in tcp_zerocopy_receive(). - Looked at find_vma() callers in drivers/, which allowed to identify a few other places where untagging is needed. - Added patch "mm, arm64: untag user pointers in get_vaddr_frames". - Added patch "drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages". - Added patch "drm/radeon, arm64: untag user pointers in radeon_ttm_tt_pin_userptr". - Added patch "IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr". - Added patch "media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get". - Added patch "tee/optee, arm64: untag user pointers in check_mem_type". - Added patch "vfio/type1, arm64: untag user pointers". Changes in v12: - Changed untagging in tcp_zerocopy_receive() to also untag zc->address. - Fixed untagging in prctl_set_mm* to only untag pointers for vma lookups and validity checks, but leave them as is for actual user space accesses. - Updated the link to the v2 of the "arm64 relaxed ABI" patchset [3]. - Dropped the documentation patch, as the "arm64 relaxed ABI" patchset [3] handles that. Changes in v11: - Added "uprobes, arm64: untag user pointers in find_active_uprobe" patch. - Added "bpf, arm64: untag user pointers in stack_map_get_build_id_offset" patch. - Fixed "tracing, arm64: untag user pointers in seq_print_user_ip" to correctly perform subtration with a tagged addr. - Moved untagged_addr() from SYSCALL_DEFINE3(mprotect) and SYSCALL_DEFINE4(pkey_mprotect) to do_mprotect_pkey(). - Moved untagged_addr() definition for other arches from include/linux/memory.h to include/linux/mm.h. - Changed untagging in strn*_user() to perform userspace accesses through tagged pointers. - Updated the documentation to mention that passing tagged pointers to memory syscalls is allowed. - Updated the test to use malloc'ed memory instead of stack memory. Changes in v10: - Added "mm, arm64: untag user pointers passed to memory syscalls" back. - New patch "fs, arm64: untag user pointers in fs/userfaultfd.c". - New patch "net, arm64: untag user pointers in tcp_zerocopy_receive". - New patch "kernel, arm64: untag user pointers in prctl_set_mm*". - New patch "tracing, arm64: untag user pointers in seq_print_user_ip". Changes in v9: - Rebased onto 4.20-rc6. - Used u64 instead of __u64 in type casts in the untagged_addr macro for arm64. - Added braces around (addr) in the untagged_addr macro for other arches. Changes in v8: - Rebased onto 65102238 (4.20-rc1). - Added a note to the cover letter on why syscall wrappers/shims that untag user pointers won't work. - Added a note to the cover letter that this patchset has been merged into the Pixel 2 kernel tree. - Documentation fixes, in particular added a list of syscalls that don't support tagged user pointers. Changes in v7: - Rebased onto 17b57b18 (4.19-rc6). - Dropped the "arm64: untag user address in __do_user_fault" patch, since the existing patches already handle user faults properly. - Dropped the "usb, arm64: untag user addresses in devio" patch, since the passed pointer must come from a vma and therefore be untagged. - Dropped the "arm64: annotate user pointers casts detected by sparse" patch (see the discussion to the replies of the v6 of this patchset). - Added more context to the cover letter. - Updated Documentation/arm64/tagged-pointers.txt. Changes in v6: - Added annotations for user pointer casts found by sparse. - Rebased onto 050cdc6c (4.19-rc1+). Changes in v5: - Added 3 new patches that add untagging to places found with static analysis. - Rebased onto 44c929e1 (4.18-rc8). Changes in v4: - Added a selftest for checking that passing tagged pointers to the kernel succeeds. - Rebased onto 81e97f013 (4.18-rc1+). Changes in v3: - Rebased onto e5c51f30 (4.17-rc6+). - Added linux-arch@ to the list of recipients. Changes in v2: - Rebased onto 2d618bdf (4.17-rc3+). - Removed excessive untagging in gup.c. - Removed untagging pointers returned from __uaccess_mask_ptr. Changes in v1: - Rebased onto 4.17-rc1. Changes in RFC v2: - Added "#ifndef untagged_addr..." fallback in linux/uaccess.h instead of defining it for each arch individually. - Updated Documentation/arm64/tagged-pointers.txt. - Dropped "mm, arm64: untag user addresses in memory syscalls". - Rebased onto 3eb2ce82 (4.16-rc7). Signed-off-by: Andrey Konovalov <andreyknvl(a)google.com> Andrey Konovalov (16): uaccess: add untagged_addr definition for other arches arm64: untag user pointers in access_ok and __uaccess_mask_ptr lib, arm64: untag user pointers in strn*_user mm: untag user pointers in do_pages_move arm64: untag user pointers passed to memory syscalls mm, arm64: untag user pointers in mm/gup.c mm, arm64: untag user pointers in get_vaddr_frames fs, arm64: untag user pointers in copy_mount_options fs, arm64: untag user pointers in fs/userfaultfd.c drm/amdgpu, arm64: untag user pointers drm/radeon, arm64: untag user pointers in radeon_gem_userptr_ioctl IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get tee, arm64: untag user pointers in tee_shm_register vfio/type1, arm64: untag user pointers in vaddr_get_pfn selftests, arm64: add a selftest for passing tagged pointers to kernel arch/arm64/include/asm/uaccess.h | 10 +++-- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 + drivers/gpu/drm/radeon/radeon_gem.c | 2 + drivers/infiniband/core/uverbs_cmd.c | 4 ++ drivers/media/v4l2-core/videobuf-dma-contig.c | 9 ++-- drivers/tee/tee_shm.c | 1 + drivers/vfio/vfio_iommu_type1.c | 2 + fs/namespace.c | 2 +- fs/userfaultfd.c | 22 +++++----- include/linux/mm.h | 4 ++ lib/strncpy_from_user.c | 3 +- lib/strnlen_user.c | 3 +- mm/frame_vector.c | 2 + mm/gup.c | 4 ++ mm/madvise.c | 2 + mm/mempolicy.c | 3 ++ mm/migrate.c | 1 + mm/mincore.c | 2 + mm/mlock.c | 4 ++ mm/mprotect.c | 2 + mm/mremap.c | 2 + mm/msync.c | 2 + tools/testing/selftests/arm64/.gitignore | 1 + tools/testing/selftests/arm64/Makefile | 22 ++++++++++ .../testing/selftests/arm64/run_tags_test.sh | 12 ++++++ tools/testing/selftests/arm64/tags_lib.c | 42 +++++++++++++++++++ tools/testing/selftests/arm64/tags_test.c | 18 ++++++++ 28 files changed, 163 insertions(+), 22 deletions(-) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_lib.c create mode 100644 tools/testing/selftests/arm64/tags_test.c -- 2.22.0.rc1.311.g5d7573a151-goog

6 years, 6 months

9
71
0 0

[bug report] pidfd: add polling selftests

by Dan Carpenter

Hello Joel Fernandes (Google), The patch 233ad92edbea: "pidfd: add polling selftests" from Apr 30, 2019, leads to the following static checker warning: ./tools/testing/selftests/pidfd/pidfd_test.c:522 test_pidfd_poll_leader_exit() error: uninitialized symbol 'ret'. ./tools/testing/selftests/pidfd/pidfd_test.c 485 static void test_pidfd_poll_leader_exit(int use_waitpid) 486 { 487 int pid, pidfd = 0; 488 int status, ret; 489 time_t prog_start = time(NULL); 490 const char *test_name = "pidfd_poll check for premature notification on non-empty" 491 "group leader exit"; 492 493 child_exit_secs = mmap(NULL, sizeof *child_exit_secs, PROT_READ | PROT_WRITE, 494 MAP_SHARED | MAP_ANONYMOUS, -1, 0); 495 496 if (child_exit_secs == MAP_FAILED) 497 ksft_exit_fail_msg("%s test: mmap failed (errno %d)\n", 498 test_name, errno); 499 500 ksft_print_msg("Parent: pid: %d\n", getpid()); 501 pid = pidfd_clone(CLONE_PIDFD, &pidfd, child_poll_leader_exit_test); 502 if (pid < 0) 503 ksft_exit_fail_msg("%s test: pidfd_clone failed (ret %d, errno %d)\n", 504 test_name, pid, errno); 505 506 ksft_print_msg("Parent: Waiting for Child (%d) to complete.\n", pid); 507 508 if (use_waitpid) { 509 ret = waitpid(pid, &status, 0); 510 if (ret == -1) 511 ksft_print_msg("Parent: error\n"); 512 } else { 513 /* 514 * This sleep tests for the case where if the child exits, and is in 515 * EXIT_ZOMBIE, but the thread group leader is non-empty, then the poll 516 * doesn't prematurely return even though there are active threads 517 */ 518 sleep(1); 519 poll_pidfd(test_name, pidfd); "ret" is not initialized on this path. 520 } 521 522 if (ret == pid) ^^^ 523 ksft_print_msg("Parent: Child process waited for.\n"); 524 525 time_t since_child_exit = time(NULL) - *child_exit_secs; 526 527 ksft_print_msg("Time since child exit: %lu\n", since_child_exit); regards, dan carpenter

6 years, 6 months

1
0
0 0

[PATCH v2 0/2] firmware: Add support for loading compressed files

by Takashi Iwai

Hi, here are the rest and the main part of patches to add the support for loading the compressed firmware files. The patch was slightly refactored for more easily enhancing for other compression formats (if anyone wants). Also the selftest patch is included. The functionality doesn't change from the previous patchset. thanks, Takashi === Takashi Iwai (2): firmware: Add support for loading compressed files selftests: firmware: Add compressed firmware tests drivers/base/firmware_loader/Kconfig | 18 +++ drivers/base/firmware_loader/firmware.h | 8 +- drivers/base/firmware_loader/main.c | 147 ++++++++++++++++++++-- tools/testing/selftests/firmware/fw_filesystem.sh | 73 +++++++++-- tools/testing/selftests/firmware/fw_lib.sh | 7 ++ tools/testing/selftests/firmware/fw_run_tests.sh | 1 + 6 files changed, 232 insertions(+), 22 deletions(-) -- 2.16.4

6 years, 6 months

1
3
0 0

[PATCH v3 15/20] docs: move protection-keys.rst to the core-api book

by Mauro Carvalho Chehab

This document is used by multiple architectures: $ echo $(git grep -l pkey_mprotect arch|cut -d'/' -f 2|sort|uniq) alpha arm arm64 ia64 m68k microblaze mips parisc powerpc s390 sh sparc x86 xtensa So, let's move it to the core book and adjust the links to it accordingly. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung(a)kernel.org> --- Documentation/core-api/index.rst | 1 + Documentation/{x86 => core-api}/protection-keys.rst | 0 Documentation/x86/index.rst | 1 - arch/powerpc/Kconfig | 2 +- arch/x86/Kconfig | 2 +- tools/testing/selftests/x86/protection_keys.c | 2 +- 6 files changed, 4 insertions(+), 4 deletions(-) rename Documentation/{x86 => core-api}/protection-keys.rst (100%) diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst index ee1bb8983a88..2466a4c51031 100644 --- a/Documentation/core-api/index.rst +++ b/Documentation/core-api/index.rst @@ -34,6 +34,7 @@ Core utilities timekeeping boot-time-mm memory-hotplug + protection-keys Interfaces for kernel debugging diff --git a/Documentation/x86/protection-keys.rst b/Documentation/core-api/protection-keys.rst similarity index 100% rename from Documentation/x86/protection-keys.rst rename to Documentation/core-api/protection-keys.rst diff --git a/Documentation/x86/index.rst b/Documentation/x86/index.rst index ae36fc5fc649..f2de1b2d3ac7 100644 --- a/Documentation/x86/index.rst +++ b/Documentation/x86/index.rst @@ -19,7 +19,6 @@ x86-specific Documentation tlb mtrr pat - protection-keys intel_mpx amd-memory-encryption pti diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 8c1c636308c8..3b795a0cab62 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -898,7 +898,7 @@ config PPC_MEM_KEYS page-based protections, but without requiring modification of the page tables when an application changes protection domains. - For details, see Documentation/vm/protection-keys.rst + For details, see Documentation/core-api/protection-keys.rst If unsure, say y. diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2bbbd4d1ba31..d87d53fcd261 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1911,7 +1911,7 @@ config X86_INTEL_MEMORY_PROTECTION_KEYS page-based protections, but without requiring modification of the page tables when an application changes protection domains. - For details, see Documentation/x86/protection-keys.txt + For details, see Documentation/core-api/protection-keys.rst If unsure, say y. diff --git a/tools/testing/selftests/x86/protection_keys.c b/tools/testing/selftests/x86/protection_keys.c index 5d546dcdbc80..480995bceefa 100644 --- a/tools/testing/selftests/x86/protection_keys.c +++ b/tools/testing/selftests/x86/protection_keys.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Tests x86 Memory Protection Keys (see Documentation/x86/protection-keys.txt) + * Tests x86 Memory Protection Keys (see Documentation/core-api/protection-keys.rst) * * There are examples in here of: * * how to set protection keys on memory -- 2.21.0

6 years, 6 months

2
1
0 0

[GIT PULL] Kselftest second fixes update for Linux 5.2-rc4

by Shuah Khan

Hi Linus, Please pull the following second Kselftest fixes update for Linux 5.2 rc4. This Kselftest second fixes update for Linux 5.2-rc4 consists of a single fix for vm test build failure regression when it is built by itself. I found this while I was sanity checking the first fixes update for Linux 5.2. Would like to get this into rc4. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit bc2cce3f2ebcae02aa4bb29e3436bf75ee674c32: selftests: vm: install test_vmalloc.sh for run_vmtests (2019-05-30 08:32:57 -0600) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-5.2-rc4-2 for you to fetch changes up to e2e88325f4bcaea51f454723971f7b5ee0e1aa80: selftests: vm: Fix test build failure when built by itself (2019-06-05 16:05:40 -0600) ---------------------------------------------------------------- linux-kselftest-5.2-rc4-2 This Kselftest second fixes update for Linux 5.2-rc4 consists of a single fix for vm test build failure regression when it is built by itself. ---------------------------------------------------------------- Shuah Khan (1): selftests: vm: Fix test build failure when built by itself tools/testing/selftests/vm/Makefile | 4 ---- 1 file changed, 4 deletions(-) ----------------------------------------------------------------

6 years, 6 months

2
1
0 0

[PATCH for 5.2 08/12] rseq/selftests: arm: use udf instruction for RSEQ_SIG

by Mathieu Desnoyers

Use udf as the guard instruction for the restartable sequence abort handler. Previously, the chosen signature was not a valid instruction, based on the assumption that it could always sit in a literal pool. However, there are compilation environments in which literal pools are not availble, for instance execute-only code. Therefore, we need to choose a signature value that is also a valid instruction. Handle compiling with -mbig-endian on ARMv6+, which generates binaries with mixed code vs data endianness (little endian code, big endian data). Else mismatch between code endianness for the generated signatures and data endianness for the RSEQ_SIG parameter passed to the rseq registration will trigger application segmentation faults when the kernel try to abort rseq critical sections. Prior to ARMv6, -mbig-endian generates big-endian code and data, so endianness should not be reversed in that case. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> CC: Peter Zijlstra <peterz(a)infradead.org> CC: Thomas Gleixner <tglx(a)linutronix.de> CC: Joel Fernandes <joelaf(a)google.com> CC: Catalin Marinas <catalin.marinas(a)arm.com> CC: Dave Watson <davejwatson(a)fb.com> CC: Will Deacon <will.deacon(a)arm.com> CC: Shuah Khan <shuah(a)kernel.org> CC: Andi Kleen <andi(a)firstfloor.org> CC: linux-kselftest(a)vger.kernel.org CC: "H . Peter Anvin" <hpa(a)zytor.com> CC: Chris Lameter <cl(a)linux.com> CC: Russell King <linux(a)arm.linux.org.uk> CC: Michael Kerrisk <mtk.manpages(a)gmail.com> CC: "Paul E . McKenney" <paulmck(a)linux.vnet.ibm.com> CC: Paul Turner <pjt(a)google.com> CC: Boqun Feng <boqun.feng(a)gmail.com> CC: Josh Triplett <josh(a)joshtriplett.org> CC: Steven Rostedt <rostedt(a)goodmis.org> CC: Ben Maurer <bmaurer(a)fb.com> CC: linux-api(a)vger.kernel.org CC: Andy Lutomirski <luto(a)amacapital.net> CC: Andrew Morton <akpm(a)linux-foundation.org> CC: Linus Torvalds <torvalds(a)linux-foundation.org> --- tools/testing/selftests/rseq/rseq-arm.h | 52 +++++++++++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/rseq/rseq-arm.h b/tools/testing/selftests/rseq/rseq-arm.h index 5f262c54364f..e8ccfc37d685 100644 --- a/tools/testing/selftests/rseq/rseq-arm.h +++ b/tools/testing/selftests/rseq/rseq-arm.h @@ -5,7 +5,54 @@ * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> */ -#define RSEQ_SIG 0x53053053 +/* + * RSEQ_SIG uses the udf A32 instruction with an uncommon immediate operand + * value 0x5de3. This traps if user-space reaches this instruction by mistake, + * and the uncommon operand ensures the kernel does not move the instruction + * pointer to attacker-controlled code on rseq abort. + * + * The instruction pattern in the A32 instruction set is: + * + * e7f5def3 udf #24035 ; 0x5de3 + * + * This translates to the following instruction pattern in the T16 instruction + * set: + * + * little endian: + * def3 udf #243 ; 0xf3 + * e7f5 b.n <7f5> + * + * pre-ARMv6 big endian code: + * e7f5 b.n <7f5> + * def3 udf #243 ; 0xf3 + * + * ARMv6+ -mbig-endian generates mixed endianness code vs data: little-endian + * code and big-endian data. Ensure the RSEQ_SIG data signature matches code + * endianness. Prior to ARMv6, -mbig-endian generates big-endian code and data + * (which match), so there is no need to reverse the endianness of the data + * representation of the signature. However, the choice between BE32 and BE8 + * is done by the linker, so we cannot know whether code and data endianness + * will be mixed before the linker is invoked. + */ + +#define RSEQ_SIG_CODE 0xe7f5def3 + +#ifndef __ASSEMBLER__ + +#define RSEQ_SIG_DATA \ + ({ \ + int sig; \ + asm volatile ( "b 2f\n\t" \ + "1: .inst " __rseq_str(RSEQ_SIG_CODE) "\n\t" \ + "2:\n\t" \ + "ldr %[sig], 1b\n\t" \ + : [sig] "=r" (sig)); \ + sig; \ + }) + +#define RSEQ_SIG RSEQ_SIG_DATA + +#endif #define rseq_smp_mb() __asm__ __volatile__ ("dmb" ::: "memory", "cc") #define rseq_smp_rmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc") @@ -78,7 +125,8 @@ do { \ __rseq_str(table_label) ":\n\t" \ ".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \ - ".word " __rseq_str(RSEQ_SIG) "\n\t" \ + ".arm\n\t" \ + ".inst " __rseq_str(RSEQ_SIG_CODE) "\n\t" \ __rseq_str(label) ":\n\t" \ teardown \ "b %l[" __rseq_str(abort_label) "]\n\t" -- 2.11.0

6 years, 6 months

1
3
0 0

[PATCH AUTOSEL 4.9 02/20] selftests: netfilter: missing error check when setting up veth interface

by Sasha Levin

From: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> [ Upstream commit 82ce6eb1dd13fd12e449b2ee2c2ec051e6f52c43 ] A test for the basic NAT functionality uses ip command which needs veth device. There is a condition where the kernel support for veth is not compiled into the kernel and the test script breaks. This patch contains code for reasonable error display and correct code exit. Signed-off-by: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> Acked-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/nft_nat.sh | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index 8ec76681605c..f25f72a75cf3 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -23,7 +23,11 @@ ip netns add ns0 ip netns add ns1 ip netns add ns2 -ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 +ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi ip link add veth1 netns ns0 type veth peer name eth0 netns ns2 ip -net ns0 link set lo up -- 2.20.1

6 years, 6 months

1
0
0 0

[PATCH AUTOSEL 4.14 05/31] selftests: netfilter: missing error check when setting up veth interface

by Sasha Levin

From: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> [ Upstream commit 82ce6eb1dd13fd12e449b2ee2c2ec051e6f52c43 ] A test for the basic NAT functionality uses ip command which needs veth device. There is a condition where the kernel support for veth is not compiled into the kernel and the test script breaks. This patch contains code for reasonable error display and correct code exit. Signed-off-by: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> Acked-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/nft_nat.sh | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index 8ec76681605c..f25f72a75cf3 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -23,7 +23,11 @@ ip netns add ns0 ip netns add ns1 ip netns add ns2 -ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 +ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi ip link add veth1 netns ns0 type veth peer name eth0 netns ns2 ip -net ns0 link set lo up -- 2.20.1

6 years, 6 months

1
0
0 0

[PATCH AUTOSEL 4.19 07/49] selftests: netfilter: missing error check when setting up veth interface

by Sasha Levin

From: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> [ Upstream commit 82ce6eb1dd13fd12e449b2ee2c2ec051e6f52c43 ] A test for the basic NAT functionality uses ip command which needs veth device. There is a condition where the kernel support for veth is not compiled into the kernel and the test script breaks. This patch contains code for reasonable error display and correct code exit. Signed-off-by: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> Acked-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/nft_nat.sh | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index 8ec76681605c..f25f72a75cf3 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -23,7 +23,11 @@ ip netns add ns0 ip netns add ns1 ip netns add ns2 -ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 +ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi ip link add veth1 netns ns0 type veth peer name eth0 netns ns2 ip -net ns0 link set lo up -- 2.20.1

6 years, 6 months

1
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0 0

[PATCH AUTOSEL 5.1 14/70] selftests: netfilter: missing error check when setting up veth interface

by Sasha Levin

From: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> [ Upstream commit 82ce6eb1dd13fd12e449b2ee2c2ec051e6f52c43 ] A test for the basic NAT functionality uses ip command which needs veth device. There is a condition where the kernel support for veth is not compiled into the kernel and the test script breaks. This patch contains code for reasonable error display and correct code exit. Signed-off-by: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> Acked-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/nft_nat.sh | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index 3194007cf8d1..a59c5fd4e987 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -23,7 +23,11 @@ ip netns add ns0 ip netns add ns1 ip netns add ns2 -ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 +ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi ip link add veth1 netns ns0 type veth peer name eth0 netns ns2 ip -net ns0 link set lo up -- 2.20.1

6 years, 6 months

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[PATCH] selftests: vm: Fix test build failure when built by itself

by Shuah Khan

vm test build fails when test is built by itself using make -C tools/testing/selftests/vm or cd tools/testing/selftests/vm; make When the test is built invoking its Makefile directly, it defines OUTPUT which conflicts with lib.mk's logic to install headers. make --no-builtin-rules INSTALL_HDR_PATH=$OUTPUT/usr \ ARCH=x86 -C ../../../.. headers_install make[1]: Entering directory '/mnt/data/lkml/linux_5.2' REMOVE shmparam.h rm: cannot remove '/usr/include/asm-generic/shmparam.h': Permission denied scripts/Makefile.headersinst:96: recipe for target '/usr/include/asm-generic/.install' failed make[3]: *** [/usr/include/asm-generic/.install] Error 1 scripts/Makefile.headersinst:32: recipe for target 'asm-generic' failed make[2]: *** [asm-generic] Error 2 Makefile:1199: recipe for target 'headers_install' failed make[1]: *** [headers_install] Error 2 make[1]: Leaving directory '/mnt/data/lkml/linux_5.2' ../lib.mk:52: recipe for target 'khdr' failed make: *** [khdr] Error 2 Fixes: 8ce72dc32578 ("selftests: fix headers_install circular dependency") Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/vm/Makefile | 4 ---- 1 file changed, 4 deletions(-) diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index 05306c58ff9f..9534dc2bc929 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -1,10 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for vm selftests -ifndef OUTPUT - OUTPUT := $(shell pwd) -endif - CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS) LDLIBS = -lrt TEST_GEN_FILES = compaction_test -- 2.17.1

6 years, 6 months

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[GIT PULL] Kselftest fixes update for Linux 5.2-rc4

by Shuah Khan

Hi Linus, Please pull the following Kselftest fixes update for Linux 5.2-rc4. This Kselftest update for Linux 5.2-rc4 consists of - Alex Shi's fixes to cgroup tests - Alakesh Haloi's fix to userfaultfd compiler warning - Naresh Kamboju's fix to vm install to include test script to run the test. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit eff82a263b5cfa3427fd9dbfedd96da94fdc9f19: selftests: rtc: rtctest: specify timeouts (2019-05-24 13:39:58 -0600) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-5.2-rc4 for you to fetch changes up to bc2cce3f2ebcae02aa4bb29e3436bf75ee674c32: selftests: vm: install test_vmalloc.sh for run_vmtests (2019-05-30 08:32:57 -0600) ---------------------------------------------------------------- linux-kselftest-5.2-rc4 This Kselftest update for Linux 5.2-rc4 consists of - Alex Shi's fixes to cgroup tests - Alakesh Haloi's fix to userfaultfd compiler warning - Naresh Kamboju's fix to vm install to include test script to run the test. ---------------------------------------------------------------- Alakesh Haloi (1): userfaultfd: selftest: fix compiler warning Alex Shi (3): kselftest/cgroup: fix unexpected testing failure on test_memcontrol kselftest/cgroup: fix unexpected testing failure on test_core kselftest/cgroup: fix incorrect test_core skip Naresh Kamboju (1): selftests: vm: install test_vmalloc.sh for run_vmtests tools/testing/selftests/cgroup/test_core.c | 7 ++++++- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ tools/testing/selftests/vm/Makefile | 2 ++ tools/testing/selftests/vm/userfaultfd.c | 2 +- 4 files changed, 13 insertions(+), 2 deletions(-) ----------------------------------------------------------------

6 years, 6 months

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selftests: bpf: test_sock_fields: Error: in_bpf_create_map_xattr(sk_pkt_out_cnt)Invalid

by Naresh Kamboju

Do you see this failure at your end? Our environment is build on host and install them on target device and run on Device under test (DUT). Did i miss any kernel config fragments ? bpf: test_sock_fields_ # # libbpf Error in bpf_create_map_xattr(sk_pkt_out_cnt)Invalid argument(22). Retrying without BTF. Error: in_bpf_create_map_xattr(sk_pkt_out_cnt)Invalid # # libbpf failed to create map (name 'sk_pkt_out_cnt') Invalid argument failed: to_create # # libbpf failed to load object 'test_sock_fields_kern.o' failed: to_load # # main(439)FAILbpf_prog_load_xattr() err-22 err-22: _ # [FAIL] 22 selftests bpf test_sock_fields selftests: bpf_test_sock_fields [FAIL] Full test log, https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190605/testru… Config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkf… Test results for comparison, https://qa-reports.linaro.org/lkft/linux-next-oe/tests/kselftest/bpf_test_s… Best regards Naresh Kamboju

6 years, 6 months

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[PATCH AUTOSEL 4.9 13/17] selftests/timers: Add missing fflush(stdout) calls

by Sasha Levin

From: Kees Cook <keescook(a)chromium.org> [ Upstream commit fe48319243a626c860fd666ca032daacc2ba84a5 ] When running under a pipe, some timer tests would not report output in real-time because stdout flushes were missing after printf()s that lacked a newline. This adds them to restore real-time status output that humans can enjoy. Signed-off-by: Kees Cook <keescook(a)chromium.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/timers/adjtick.c | 1 + tools/testing/selftests/timers/leapcrash.c | 1 + tools/testing/selftests/timers/mqueue-lat.c | 1 + tools/testing/selftests/timers/nanosleep.c | 1 + tools/testing/selftests/timers/nsleep-lat.c | 1 + tools/testing/selftests/timers/raw_skew.c | 1 + tools/testing/selftests/timers/set-tai.c | 1 + tools/testing/selftests/timers/set-tz.c | 2 ++ tools/testing/selftests/timers/threadtest.c | 1 + tools/testing/selftests/timers/valid-adjtimex.c | 2 ++ 10 files changed, 12 insertions(+) diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c index 9887fd538fec..91316ab4b041 100644 --- a/tools/testing/selftests/timers/adjtick.c +++ b/tools/testing/selftests/timers/adjtick.c @@ -147,6 +147,7 @@ int check_tick_adj(long tickval) eppm = get_ppm_drift(); printf("%lld usec, %lld ppm", systick + (systick * eppm / MILLION), eppm); + fflush(stdout); tx1.modes = 0; adjtimex(&tx1); diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c index a1071bdbdeb7..a77c70b47495 100644 --- a/tools/testing/selftests/timers/leapcrash.c +++ b/tools/testing/selftests/timers/leapcrash.c @@ -114,6 +114,7 @@ int main(void) } clear_time_state(); printf("."); + fflush(stdout); } printf("[OK]\n"); return ksft_exit_pass(); diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c index a2a3924d0b41..efdb62470052 100644 --- a/tools/testing/selftests/timers/mqueue-lat.c +++ b/tools/testing/selftests/timers/mqueue-lat.c @@ -113,6 +113,7 @@ int main(int argc, char **argv) int ret; printf("Mqueue latency : "); + fflush(stdout); ret = mqueue_lat_test(); if (ret < 0) { diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c index ff942ff7c9b3..2e6e94c02a33 100644 --- a/tools/testing/selftests/timers/nanosleep.c +++ b/tools/testing/selftests/timers/nanosleep.c @@ -153,6 +153,7 @@ int main(int argc, char **argv) continue; printf("Nanosleep %-31s ", clockstring(clockid)); + fflush(stdout); length = 10; while (length <= (NSEC_PER_SEC * 10)) { diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c index 2d7898fda0f1..ac06cf10a5c2 100644 --- a/tools/testing/selftests/timers/nsleep-lat.c +++ b/tools/testing/selftests/timers/nsleep-lat.c @@ -166,6 +166,7 @@ int main(int argc, char **argv) continue; printf("nsleep latency %-26s ", clockstring(clockid)); + fflush(stdout); length = 10; while (length <= (NSEC_PER_SEC * 10)) { diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c index 0ab937a17ebb..4e631da7f956 100644 --- a/tools/testing/selftests/timers/raw_skew.c +++ b/tools/testing/selftests/timers/raw_skew.c @@ -124,6 +124,7 @@ int main(int argv, char **argc) printf("WARNING: ADJ_OFFSET in progress, this will cause inaccurate results\n"); printf("Estimating clock drift: "); + fflush(stdout); sleep(120); get_monotonic_and_raw(&mon, &raw); diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c index dc88dbc8831f..3ae76ab483de 100644 --- a/tools/testing/selftests/timers/set-tai.c +++ b/tools/testing/selftests/timers/set-tai.c @@ -66,6 +66,7 @@ int main(int argc, char **argv) printf("tai offset started at %i\n", ret); printf("Checking tai offsets can be properly set: "); + fflush(stdout); for (i = 1; i <= 60; i++) { ret = set_tai(i); ret = get_tai(); diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c index f4184928b16b..b038131c9682 100644 --- a/tools/testing/selftests/timers/set-tz.c +++ b/tools/testing/selftests/timers/set-tz.c @@ -76,6 +76,7 @@ int main(int argc, char **argv) printf("tz_minuteswest started at %i, dst at %i\n", min, dst); printf("Checking tz_minuteswest can be properly set: "); + fflush(stdout); for (i = -15*60; i < 15*60; i += 30) { ret = set_tz(i, dst); ret = get_tz_min(); @@ -87,6 +88,7 @@ int main(int argc, char **argv) printf("[OK]\n"); printf("Checking invalid tz_minuteswest values are caught: "); + fflush(stdout); if (!set_tz(-15*60-1, dst)) { printf("[FAILED] %i didn't return failure!\n", -15*60-1); diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c index e632e116f05e..a4bf736dd842 100644 --- a/tools/testing/selftests/timers/threadtest.c +++ b/tools/testing/selftests/timers/threadtest.c @@ -175,6 +175,7 @@ int main(int argc, char **argv) strftime(buf, 255, "%a, %d %b %Y %T %z", localtime(&start)); printf("%s\n", buf); printf("Testing consistency with %i threads for %ld seconds: ", thread_count, runtime); + fflush(stdout); /* spawn */ for (i = 0; i < thread_count; i++) diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c index 60fe3c569bd9..a747645d79f4 100644 --- a/tools/testing/selftests/timers/valid-adjtimex.c +++ b/tools/testing/selftests/timers/valid-adjtimex.c @@ -134,6 +134,7 @@ int validate_freq(void) /* Set the leap second insert flag */ printf("Testing ADJ_FREQ... "); + fflush(stdout); for (i = 0; i < NUM_FREQ_VALID; i++) { tx.modes = ADJ_FREQUENCY; tx.freq = valid_freq[i]; @@ -261,6 +262,7 @@ int set_bad_offset(long sec, long usec, int use_nano) int validate_set_offset(void) { printf("Testing ADJ_SETOFFSET... "); + fflush(stdout); /* Test valid values */ if (set_offset(NSEC_PER_SEC - 1, 1)) -- 2.20.1

6 years, 6 months

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[PATCH AUTOSEL 4.14 20/24] selftests/timers: Add missing fflush(stdout) calls

by Sasha Levin

From: Kees Cook <keescook(a)chromium.org> [ Upstream commit fe48319243a626c860fd666ca032daacc2ba84a5 ] When running under a pipe, some timer tests would not report output in real-time because stdout flushes were missing after printf()s that lacked a newline. This adds them to restore real-time status output that humans can enjoy. Signed-off-by: Kees Cook <keescook(a)chromium.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/timers/adjtick.c | 1 + tools/testing/selftests/timers/leapcrash.c | 1 + tools/testing/selftests/timers/mqueue-lat.c | 1 + tools/testing/selftests/timers/nanosleep.c | 1 + tools/testing/selftests/timers/nsleep-lat.c | 1 + tools/testing/selftests/timers/raw_skew.c | 1 + tools/testing/selftests/timers/set-tai.c | 1 + tools/testing/selftests/timers/set-tz.c | 2 ++ tools/testing/selftests/timers/threadtest.c | 1 + tools/testing/selftests/timers/valid-adjtimex.c | 2 ++ 10 files changed, 12 insertions(+) diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c index 0caca3a06bd2..54d8d87f36b3 100644 --- a/tools/testing/selftests/timers/adjtick.c +++ b/tools/testing/selftests/timers/adjtick.c @@ -136,6 +136,7 @@ int check_tick_adj(long tickval) eppm = get_ppm_drift(); printf("%lld usec, %lld ppm", systick + (systick * eppm / MILLION), eppm); + fflush(stdout); tx1.modes = 0; adjtimex(&tx1); diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c index 830c462f605d..dc80728ed191 100644 --- a/tools/testing/selftests/timers/leapcrash.c +++ b/tools/testing/selftests/timers/leapcrash.c @@ -101,6 +101,7 @@ int main(void) } clear_time_state(); printf("."); + fflush(stdout); } printf("[OK]\n"); return ksft_exit_pass(); diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c index 1867db5d6f5e..7916cf5cc6ff 100644 --- a/tools/testing/selftests/timers/mqueue-lat.c +++ b/tools/testing/selftests/timers/mqueue-lat.c @@ -102,6 +102,7 @@ int main(int argc, char **argv) int ret; printf("Mqueue latency : "); + fflush(stdout); ret = mqueue_lat_test(); if (ret < 0) { diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c index 8adb0bb51d4d..71b5441c2fd9 100644 --- a/tools/testing/selftests/timers/nanosleep.c +++ b/tools/testing/selftests/timers/nanosleep.c @@ -142,6 +142,7 @@ int main(int argc, char **argv) continue; printf("Nanosleep %-31s ", clockstring(clockid)); + fflush(stdout); length = 10; while (length <= (NSEC_PER_SEC * 10)) { diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c index c3c3dc10db17..eb3e79ed7b4a 100644 --- a/tools/testing/selftests/timers/nsleep-lat.c +++ b/tools/testing/selftests/timers/nsleep-lat.c @@ -155,6 +155,7 @@ int main(int argc, char **argv) continue; printf("nsleep latency %-26s ", clockstring(clockid)); + fflush(stdout); length = 10; while (length <= (NSEC_PER_SEC * 10)) { diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c index dcf73c5dab6e..b41d8dd0c40c 100644 --- a/tools/testing/selftests/timers/raw_skew.c +++ b/tools/testing/selftests/timers/raw_skew.c @@ -112,6 +112,7 @@ int main(int argv, char **argc) printf("WARNING: ADJ_OFFSET in progress, this will cause inaccurate results\n"); printf("Estimating clock drift: "); + fflush(stdout); sleep(120); get_monotonic_and_raw(&mon, &raw); diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c index 70fed27d8fd3..8c4179ee2ca2 100644 --- a/tools/testing/selftests/timers/set-tai.c +++ b/tools/testing/selftests/timers/set-tai.c @@ -55,6 +55,7 @@ int main(int argc, char **argv) printf("tai offset started at %i\n", ret); printf("Checking tai offsets can be properly set: "); + fflush(stdout); for (i = 1; i <= 60; i++) { ret = set_tai(i); ret = get_tai(); diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c index 877fd5532fee..62bd33eb16f0 100644 --- a/tools/testing/selftests/timers/set-tz.c +++ b/tools/testing/selftests/timers/set-tz.c @@ -65,6 +65,7 @@ int main(int argc, char **argv) printf("tz_minuteswest started at %i, dst at %i\n", min, dst); printf("Checking tz_minuteswest can be properly set: "); + fflush(stdout); for (i = -15*60; i < 15*60; i += 30) { ret = set_tz(i, dst); ret = get_tz_min(); @@ -76,6 +77,7 @@ int main(int argc, char **argv) printf("[OK]\n"); printf("Checking invalid tz_minuteswest values are caught: "); + fflush(stdout); if (!set_tz(-15*60-1, dst)) { printf("[FAILED] %i didn't return failure!\n", -15*60-1); diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c index 759c9c06f1a0..cf3e48919874 100644 --- a/tools/testing/selftests/timers/threadtest.c +++ b/tools/testing/selftests/timers/threadtest.c @@ -163,6 +163,7 @@ int main(int argc, char **argv) strftime(buf, 255, "%a, %d %b %Y %T %z", localtime(&start)); printf("%s\n", buf); printf("Testing consistency with %i threads for %ld seconds: ", thread_count, runtime); + fflush(stdout); /* spawn */ for (i = 0; i < thread_count; i++) diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c index d9d3ab93b31a..5397de708d3c 100644 --- a/tools/testing/selftests/timers/valid-adjtimex.c +++ b/tools/testing/selftests/timers/valid-adjtimex.c @@ -123,6 +123,7 @@ int validate_freq(void) /* Set the leap second insert flag */ printf("Testing ADJ_FREQ... "); + fflush(stdout); for (i = 0; i < NUM_FREQ_VALID; i++) { tx.modes = ADJ_FREQUENCY; tx.freq = valid_freq[i]; @@ -250,6 +251,7 @@ int set_bad_offset(long sec, long usec, int use_nano) int validate_set_offset(void) { printf("Testing ADJ_SETOFFSET... "); + fflush(stdout); /* Test valid values */ if (set_offset(NSEC_PER_SEC - 1, 1)) -- 2.20.1

6 years, 6 months

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[PATCH AUTOSEL 4.19 26/36] selftests: fib_rule_tests: fix local IPv4 address typo

by Sasha Levin

From: Hangbin Liu <liuhangbin(a)gmail.com> [ Upstream commit fc82d93e57e3d41f79eff19031588b262fc3d0b6 ] The IPv4 testing address are all in 192.51.100.0 subnet. It doesn't make sense to set a 198.51.100.1 local address. Should be a typo. Fixes: 65b2b4939a64 ("selftests: net: initial fib rule tests") Signed-off-by: Hangbin Liu <liuhangbin(a)gmail.com> Reviewed-by: David Ahern <dsahern(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/fib_rule_tests.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/fib_rule_tests.sh b/tools/testing/selftests/net/fib_rule_tests.sh index d84193bdc307..dbd90ca73e44 100755 --- a/tools/testing/selftests/net/fib_rule_tests.sh +++ b/tools/testing/selftests/net/fib_rule_tests.sh @@ -55,7 +55,7 @@ setup() $IP link add dummy0 type dummy $IP link set dev dummy0 up - $IP address add 198.51.100.1/24 dev dummy0 + $IP address add 192.51.100.1/24 dev dummy0 $IP -6 address add 2001:db8:1::1/64 dev dummy0 set +e -- 2.20.1

6 years, 6 months

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[PATCH AUTOSEL 5.1 40/60] selftests: fib_rule_tests: fix local IPv4 address typo

by Sasha Levin

From: Hangbin Liu <liuhangbin(a)gmail.com> [ Upstream commit fc82d93e57e3d41f79eff19031588b262fc3d0b6 ] The IPv4 testing address are all in 192.51.100.0 subnet. It doesn't make sense to set a 198.51.100.1 local address. Should be a typo. Fixes: 65b2b4939a64 ("selftests: net: initial fib rule tests") Signed-off-by: Hangbin Liu <liuhangbin(a)gmail.com> Reviewed-by: David Ahern <dsahern(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/fib_rule_tests.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/fib_rule_tests.sh b/tools/testing/selftests/net/fib_rule_tests.sh index 4b7e107865bf..1ba069967fa2 100755 --- a/tools/testing/selftests/net/fib_rule_tests.sh +++ b/tools/testing/selftests/net/fib_rule_tests.sh @@ -55,7 +55,7 @@ setup() $IP link add dummy0 type dummy $IP link set dev dummy0 up - $IP address add 198.51.100.1/24 dev dummy0 + $IP address add 192.51.100.1/24 dev dummy0 $IP -6 address add 2001:db8:1::1/64 dev dummy0 set +e -- 2.20.1

6 years, 6 months

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[PATCH AUTOSEL 5.1 27/60] selftests/bpf: fix bpf_get_current_task

by Sasha Levin

From: Alexei Starovoitov <ast(a)kernel.org> [ Upstream commit 7ed4b4e60bb1dd3df7a45dfbde3a96efce9df7eb ] Fix bpf_get_current_task() declaration. Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Acked-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/bpf_helpers.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h index c81fc350f7ad..a43a52cdd3f0 100644 --- a/tools/testing/selftests/bpf/bpf_helpers.h +++ b/tools/testing/selftests/bpf/bpf_helpers.h @@ -246,7 +246,7 @@ static int (*bpf_skb_change_type)(void *ctx, __u32 type) = (void *) BPF_FUNC_skb_change_type; static unsigned int (*bpf_get_hash_recalc)(void *ctx) = (void *) BPF_FUNC_get_hash_recalc; -static unsigned long long (*bpf_get_current_task)(void *ctx) = +static unsigned long long (*bpf_get_current_task)(void) = (void *) BPF_FUNC_get_current_task; static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) = (void *) BPF_FUNC_skb_change_tail; -- 2.20.1

6 years, 6 months

1
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[PATCH v1 0/9] KVM selftests for s390x

by Thomas Huth

This patch series enables the KVM selftests for s390x. As a first test, the sync_regs from x86 has been adapted to s390x, and after a fix for KVM_CAP_MAX_VCPU_ID on s390x, the kvm_create_max_vcpus is now enabled here, too. Please note that the ucall() interface is not used yet - since s390x neither has PIO nor MMIO, this needs some more work first before it becomes usable (we likely should use a DIAG hypercall here, which is what the sync_reg test is currently using, too... I started working on that topic, but did not finish that work yet, so I decided to not include it yet). RFC -> v1: - Rebase, needed to add the first patch for vcpu_nested_state_get/set - Added patch to introduce VM_MODE_DEFAULT macro - Improved/cleaned up the code in processor.c - Added patch to fix KVM_CAP_MAX_VCPU_ID on s390x - Added patch to enable the kvm_create_max_vcpus on s390x and aarch64 Andrew Jones (1): kvm: selftests: aarch64: fix default vm mode Thomas Huth (8): KVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard KVM: selftests: Guard struct kvm_vcpu_events with __KVM_HAVE_VCPU_EVENTS KVM: selftests: Introduce a VM_MODE_DEFAULT macro for the default bits KVM: selftests: Align memory region addresses to 1M on s390x KVM: selftests: Add processor code for s390x KVM: selftests: Add the sync_regs test for s390x KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID KVM: selftests: Move kvm_create_max_vcpus test to generic code MAINTAINERS | 2 + arch/mips/kvm/mips.c | 3 + arch/powerpc/kvm/powerpc.c | 3 + arch/s390/kvm/kvm-s390.c | 1 + arch/x86/kvm/x86.c | 3 + tools/testing/selftests/kvm/Makefile | 7 +- .../testing/selftests/kvm/include/kvm_util.h | 10 + .../selftests/kvm/include/s390x/processor.h | 22 ++ .../kvm/{x86_64 => }/kvm_create_max_vcpus.c | 3 +- .../selftests/kvm/lib/aarch64/processor.c | 2 +- tools/testing/selftests/kvm/lib/kvm_util.c | 25 +- .../selftests/kvm/lib/s390x/processor.c | 286 ++++++++++++++++++ .../selftests/kvm/lib/x86_64/processor.c | 2 +- .../selftests/kvm/s390x/sync_regs_test.c | 151 +++++++++ virt/kvm/arm/arm.c | 3 + virt/kvm/kvm_main.c | 2 - 16 files changed, 514 insertions(+), 11 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/s390x/processor.h rename tools/testing/selftests/kvm/{x86_64 => }/kvm_create_max_vcpus.c (93%) create mode 100644 tools/testing/selftests/kvm/lib/s390x/processor.c create mode 100644 tools/testing/selftests/kvm/s390x/sync_regs_test.c -- 2.21.0

6 years, 6 months

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[PATCH] kbuild: teach kselftest-merge to find nested config files

by Dan Rue

Current implementation of kselftest-merge only finds config files that are one level deep using `$(srctree)/tools/testing/selftests/*/config`. Often, config files are added in nested directories, and do not get picked up by kselftest-merge. Use `find` to catch all config files under `$(srctree)/tools/testing/selftests` instead. Signed-off-by: Dan Rue <dan.rue(a)linaro.org> --- Makefile | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/Makefile b/Makefile index a45f84a7e811..e99e7f9484af 100644 --- a/Makefile +++ b/Makefile @@ -1228,9 +1228,8 @@ kselftest-clean: PHONY += kselftest-merge kselftest-merge: $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ - -m $(objtree)/.config \ - $(srctree)/tools/testing/selftests/*/config + $(Q)find $(srctree)/tools/testing/selftests -name config | \ + xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig # --------------------------------------------------------------------------- -- 2.21.0

6 years, 6 months

3
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bpf: test_xdp_vlan.sh: Kernel panic: Unable to handle kernel paging request at virtual address 000080096d61a000

by Naresh Kamboju

Kernel panic while running bpf: test_xdp_vlan.sh test case on arm64 Juno hardware Linux version 5.2.0-rc3-next-20190604 bpf: test_xdp_vlan.sh # --- 100.64.41.2 ping statistics --- 100.64.41.2: ping_statistics # # 3 packets transmitted, 3 received, 0% packet loss, time 2049ms packets: transmitted,_3 # # rtt min/avg/max/mdev = 0.172/0.193/0.205/0.022 ms min/avg/max/mdev: =_0.172/0.193/0.205/0.022 # # PING 100.64.41.1 (100.64.41.1) 56(84) bytes of data. 100.64.41.1: (100.64.41.1)_56(84) # # 64 bytes from 100.64.41.1 icmp_seq=1 ttl=64 time=0.146 ms bytes: from_100.64.41.1 # # 64 bytes from 100.64.41.1 icmp_seq=2 ttl=64 time=0.182 ms bytes: from_100.64.41.1 # [ 492.263541] ip6_tunnel: gre6_dev xmit: Local address not yet configured! [ 788.768658] ip6_tunnel: gre6_dev xmit: Local address not yet configured! [ 940.373938] Unable to handle kernel paging request at virtual address 000080096d61a000 [ 940.381873] Mem abort info: [ 940.384717] ESR = 0x96000004 [ 940.387797] Exception class = DABT (current EL), IL = 32 bits [ 940.393715] SET = 0, FnV = 0 [ 940.396788] EA = 0, S1PTW = 0 [ 940.399949] Data abort info: [ 940.402805] ISV = 0, ISS = 0x00000004 [ 940.406647] CM = 0, WnR = 0 [ 940.409639] user pgtable: 4k pages, 48-bit VAs, pgdp=000000093bee0000 [ 940.416065] [000080096d61a000] pgd=0000000000000000 [ 940.421079] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 940.426598] Modules linked in: sit act_gact cls_flower cls_bpf sch_ingress xt_tcpudp iptable_filter ip_tables x_tables tun algif_hash af_alg tda998x drm_kms_helper drm crct10dif_ce drm_panel_orientation_quirks fuse [last unloaded: test_bpf] [ 940.447715] CPU: 2 PID: 8748 Comm: ping Not tainted 5.2.0-rc3-next-20190604 #1 [ 940.454865] Hardware name: ARM Juno development board (r2) (DT) [ 940.460727] pstate: 80000005 (Nzcv daif -PAN -UAO) [ 940.465480] pc : ip6_pol_route+0x1f4/0x738 [ 940.469537] lr : ip6_pol_route+0x1d8/0x738 [ 940.473590] sp : ffff000013fb3010 [ 940.476870] x29: ffff000013fb3010 x28: ffff000011be3000 [ 940.482132] x27: ffff80096f228a00 x26: ffff80096f364000 [ 940.487393] x25: ffff000010da3500 x24: 000000000000004e [ 940.492654] x23: ffff00001198e000 x22: ffff000013fb3240 [ 940.497915] x21: ffff00001195f000 x20: ffff80096bf95a00 [ 940.503175] x19: ffff000013fb3268 x18: 0000000000000000 [ 940.508435] x17: 0000000000000001 x16: 0000000000000000 [ 940.513696] x15: 0000000000000000 x14: 1312111000000000 [ 940.518956] x13: 0002ccaf00000000 x12: 5cf61adb01002c22 [ 940.524216] x11: 0000000000000002 x10: 0000000000000003 [ 940.529477] x9 : 0000000000000000 x8 : ffff00001195f848 [ 940.534738] x7 : ffff000013fb2ffb x6 : 0000000000000000 [ 940.539998] x5 : ffff80096f364000 x4 : 0000000000000001 [ 940.545258] x3 : 0000000000000004 x2 : 000080096d61a000 [ 940.550519] x1 : ffff80092e761700 x0 : 0000000000000000 [ 940.555780] Call trace: [ 940.558202] ip6_pol_route+0x1f4/0x738 [ 940.561914] ip6_pol_route_input+0x4c/0x60 [ 940.565971] fib6_rule_lookup+0xc8/0x170 [ 940.569855] ip6_route_input_lookup+0x70/0x88 [ 940.574169] ip6_route_input+0xe4/0x238 [ 940.577969] ip6_rcv_finish_core.isra.0+0x48/0x168 [ 940.582713] ip6_rcv_finish+0x68/0xc0 [ 940.586339] ipv6_rcv+0x70/0x228 [ 940.589536] __netif_receive_skb_one_core+0x68/0x90 [ 940.594366] __netif_receive_skb+0x28/0x80 [ 940.598422] process_backlog+0xe4/0x240 [ 940.602220] net_rx_action+0x120/0x4a8 [ 940.605933] __do_softirq+0x11c/0x580 [ 940.609559] do_softirq.part.3+0x94/0x98 [ 940.613442] __local_bh_enable_ip+0x12c/0x138 [ 940.617756] ip6_finish_output2+0x220/0xb98 [ 940.621898] __ip6_finish_output+0x1e8/0x2a8 [ 940.626126] ip6_finish_output+0x38/0xd0 [ 940.630010] ip6_output+0x80/0x350 [ 940.633378] bpf_lwt_xmit_reroute+0x2a8/0x4b0 [ 940.637692] bpf_xmit+0x120/0x178 [ 940.640972] lwtunnel_xmit+0xd0/0x210 [ 940.644600] ip_finish_output2+0x488/0xa80 [ 940.648654] __ip_finish_output+0x204/0x318 [ 940.652795] ip_finish_output+0x38/0xd0 [ 940.656592] ip_output+0x108/0x2f8 [ 940.659959] ip_local_out+0x5c/0x98 [ 940.663411] ip_send_skb+0x2c/0xb8 [ 940.666778] ip_push_pending_frames+0x44/0x50 [ 940.671093] raw_sendmsg+0xa7c/0xe20 [ 940.674633] inet_sendmsg+0x4c/0x238 [ 940.678173] sock_sendmsg+0x34/0x50 [ 940.681627] __sys_sendto+0x120/0x150 [ 940.685252] __arm64_sys_sendto+0x30/0x40 [ 940.689223] el0_svc_common.constprop.0+0x7c/0x180 [ 940.693967] el0_svc_handler+0x34/0x90 [ 940.697678] el0_svc+0x8/0xc [ 940.700531] Code: b9001020 f9403fa0 d538d082 f9402400 (f8626813) [ 940.706579] ---[ end trace 8a07ef53f23b6533 ]--- [ 940.711150] Kernel panic - not syncing: Fatal exception in interrupt [ 940.717449] SMP: stopping secondary CPUs [ 940.721536] Kernel Offset: disabled [ 940.724989] CPU features: 0x0002,24006004 [ 940.728957] Memory Limit: none [ 940.731998] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- [1] https://lkft.validation.linaro.org/scheduler/job/760547#L23242 Best regards Naresh Kamboju

6 years, 6 months

1
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BUG: kernel NULL pointer dereference, address: 00000000: memcpy+0x1d/0x30

by Naresh Kamboju

While running selftest bpf: test_maps the kernel BUG found on i386 kernel running on x86_64 machine Linux version 5.2.0-rc3-next-20190604 Full test log can be found in the below link [1] # helper_fill_hashmap(261)FAILfailed to create hashmap err Cannot allocate memory, flags 0x0 to: create_hashmap # # Fork 1024 tasks to 'test_update_delete' 1024: tasks_to # # Fork 1024 tasks to 'test_update_delete' 1024: tasks_to # # Fork 100 tasks to 'test_hashmap' 100: tasks_to # # Fork 100 tasks to 'test_hashmap_percpu' 100: tasks_to # # Fork 100 tasks to 'test_hashmap_sizes' [ 93.249753] BUG: kernel NULL pointer dereference, address: 00000000 [ 93.256586] #PF: supervisor read access in kernel mode [ 93.261714] #PF: error_code(0x0000) - not-present page [ 93.266846] *pde = 00000000 [ 93.269722] Oops: 0000 [#1] SMP [ 93.272859] CPU: 0 PID: 4354 Comm: test_sockmap Not tainted 5.2.0-rc3-next-20190604 #1 [ 93.280763] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 93.288235] EIP: memcpy+0x1d/0x30 [ 93.291547] Code: 59 58 eb 85 90 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 89 c7 53 89 d6 89 cb c1 e9 02 f3 a5 89 d9 83 e1 03 74 02 <f3> a4 5b 5e 5f 5d c3 8d b6 00 00 00 00 8d bf 00 00 00 00 3e 8d 74 [ 93.310291] EAX: e2ca9000 EBX: 00000001 ECX: 00000001 EDX: 00000000 [ 93.316548] ESI: 00000000 EDI: e2ca9000 EBP: e3d8799c ESP: e3d87990 [ 93.322806] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202 [ 93.329582] CR0: 80050033 CR2: 00000000 CR3: 20d21000 CR4: 003406d0 [ 93.335841] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 93.342097] DR6: fffe0ff0 DR7: 00000400 [ 93.345929] Call Trace: [ 93.348391] bpf_msg_push_data+0x635/0x660 [ 93.352492] ___bpf_prog_run+0xa0d/0x15a0 [ 93.356529] ? __lock_acquire+0x1fe/0x1360 [ 93.360626] __bpf_prog_run32+0x4b/0x70 [ 93.364461] ? sk_psock_msg_verdict+0x5/0x290 [ 93.368842] sk_psock_msg_verdict+0xad/0x290 [ 93.373105] ? sk_psock_msg_verdict+0xad/0x290 [ 93.377543] ? lockdep_hardirqs_on+0xec/0x1a0 [ 93.381896] ? __local_bh_enable_ip+0x78/0xf0 [ 93.386255] tcp_bpf_send_verdict+0x29c/0x3b0 [ 93.390615] tcp_bpf_sendpage+0x233/0x3d0 [ 93.394629] ? __lock_acquire+0x1fe/0x1360 [ 93.398754] ? __lock_acquire+0x1fe/0x1360 [ 93.402850] ? lock_release+0x8b/0x280 [ 93.406593] ? find_get_entry+0x136/0x300 [ 93.410599] ? touch_atime+0x34/0xd0 [ 93.414177] ? copy_page_to_iter+0x245/0x400 [ 93.418441] ? lockdep_hardirqs_on+0xec/0x1a0 [ 93.422793] ? tcp_bpf_send_verdict+0x3b0/0x3b0 [ 93.427325] inet_sendpage+0x53/0x1f0 [ 93.430981] ? inet_recvmsg+0x1e0/0x1e0 [ 93.434812] ? kernel_sendpage+0x40/0x40 [ 93.438728] kernel_sendpage+0x1e/0x40 [ 93.442474] sock_sendpage+0x24/0x30 [ 93.446054] pipe_to_sendpage+0x59/0xa0 [ 93.449894] ? direct_splice_actor+0x40/0x40 [ 93.454166] __splice_from_pipe+0xde/0x1c0 [ 93.458264] ? direct_splice_actor+0x40/0x40 [ 93.462535] ? direct_splice_actor+0x40/0x40 [ 93.466801] splice_from_pipe+0x59/0x80 [ 93.470641] ? splice_from_pipe+0x80/0x80 [ 93.474652] ? generic_splice_sendpage+0x20/0x20 [ 93.479262] generic_splice_sendpage+0x18/0x20 [ 93.483701] ? direct_splice_actor+0x40/0x40 [ 93.487971] direct_splice_actor+0x2d/0x40 [ 93.492065] splice_direct_to_actor+0x127/0x240 [ 93.496597] ? generic_pipe_buf_nosteal+0x10/0x10 [ 93.501302] do_splice_direct+0x7e/0xc0 [ 93.505134] do_sendfile+0x20d/0x3e0 [ 93.508739] sys_sendfile+0xac/0xd0 [ 93.512232] ? lock_release+0x8b/0x280 [ 93.515984] do_fast_syscall_32+0x8e/0x320 [ 93.520084] entry_SYSENTER_32+0x70/0xc8 [ 93.524009] EIP: 0xb7f9d7a1 [ 93.526807] Code: 8b 98 60 cd ff ff 85 d2 89 c8 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 1c 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 [ 93.545542] EAX: ffffffda EBX: 0000001a ECX: 0000001e EDX: 00000000 [ 93.551799] ESI: 00000001 EDI: 0000001a EBP: 00000001 ESP: bfa67a64 [ 93.558057] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000206 [ 93.564836] Modules linked in: tun algif_hash af_alg x86_pkg_temp_thermal fuse [ 93.572082] CR2: 0000000000000000 [ 93.575411] ---[ end trace c106584042e12a8d ]--- [ 93.580046] EIP: memcpy+0x1d/0x30 [ 93.583355] Code: 59 58 eb 85 90 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 89 c7 53 89 d6 89 cb c1 e9 02 f3 a5 89 d9 83 e1 03 74 02 <f3> a4 5b 5e 5f 5d c3 8d b6 00 00 00 00 8d bf 00 00 00 00 3e 8d 74 [ 93.602092] EAX: e2ca9000 EBX: 00000001 ECX: 00000001 EDX: 00000000 [ 93.608349] ESI: 00000000 EDI: e2ca9000 EBP: e3d8799c ESP: d967e49c [ 93.614607] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010202 [ 93.621408] CR0: 80050033 CR2: 00000000 CR3: 20d21000 CR4: 003406d0 [ 93.627694] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 93.633951] DR6: fffe0ff0 DR7: 00000400 [ 93.637783] BUG: sleeping function called from invalid context at /usr/src/kernel/include/linux/percpu-rwsem.h:34 [ 93.648035] in_atomic(): 1, irqs_disabled(): 1, pid: 4354, name: test_sockmap [ 93.655156] INFO: lockdep is turned off. [ 93.659074] irq event stamp: 1538 [ 93.662408] hardirqs last enabled at (1537): [<d902cadf>] _raw_spin_unlock_irqrestore+0x2f/0x50 [ 93.671200] hardirqs last disabled at (1538): [<d840182c>] trace_hardirqs_off_thunk+0xc/0x10 [ 93.679624] softirqs last enabled at (1532): [<d8d1b849>] lock_sock_nested+0x39/0x90 [ 93.687465] softirqs last disabled at (1530): [<d8d1b83f>] lock_sock_nested+0x2f/0x90 [ 93.695284] CPU: 0 PID: 4354 Comm: test_sockmap Tainted: G D 5.2.0-rc3-next-20190604 #1 [ 93.704573] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 93.712043] Call Trace: [ 93.714490] dump_stack+0x66/0x96 [ 93.717800] ___might_sleep+0x13e/0x230 [ 93.721629] __might_sleep+0x33/0x80 [ 93.725200] exit_signals+0x2a/0x200 [ 93.728771] do_exit+0x8e/0xbb0 [ 93.731910] ? do_fast_syscall_32+0x8e/0x320 [ 93.736182] rewind_stack_do_exit+0x11/0x13 [ 93.740356] EIP: 0xb7f9d7a1 [ 93.743150] Code: 8b 98 60 cd ff ff 85 d2 89 c8 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 1c 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 [ 93.761887] EAX: ffffffda EBX: 0000001a ECX: 0000001e EDX: 00000000 [ 93.768142] ESI: 00000001 EDI: 0000001a EBP: 00000001 ESP: bfa67a64 [ 93.774406] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000206 100: tasks_to [ 93.781266] note: test_sockmap[4354] exited with preempt_count 2 # # Fork 100 tasks to 'test_hashmap_walk' 100: tasks_to # # helper_fill_hashmap(261)FAILfailed to create hashmap err Cannot allocate memory, flags 0x0 [1] https://lkft.validation.linaro.org/scheduler/job/760391#L13640 Best regards Naresh Kamboju

6 years, 6 months

1
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bpf: test_btf : kernel Oops: 207 : PC is at memcpy+0xc0/0x330

by Naresh Kamboju

while running kernel selftest bpf: test_btf the following kernel oops detected on beaglebone x15 board. Linux version 5.2.0-rc3-next-20190604 Full test log link can be found below [1] bpf: test_btf_ # # BTF GET_INFO test[3] (Large bpf_btf_info) OK GET_INFO: test[3]_(Large # # BTF GET_INFO test[4] (BTF ID) OK GET_INFO: test[4]_(BTF # [ 341.144885] 8<--- cut here --- [ 341.148164] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 341.156443] pgd = b0902156 [ 341.159294] [00000000] *pgd=9655e003, *pmd=ff918003 [ 341.164229] Internal error: Oops: 207 [#1] SMP ARM [ 341.169052] Modules linked in: tun sha1_generic sha1_arm_neon sha1_arm algif_hash af_alg snd_soc_simple_card snd_soc_simple_card_utils snd_soc_core ac97_bus snd_pcm_dmaengine snd_pcm snd_timer snd soundcore fuse [ 341.187962] CPU: 0 PID: 6773 Comm: test_sockmap Not tainted 5.2.0-rc3-next-20190604 #1 [ 341.195923] Hardware name: Generic DRA74X (Flattened Device Tree) [ 341.202058] PC is at memcpy+0xc0/0x330 [ 341.205836] LR is at bpf_msg_push_data+0x70c/0x728 [ 341.210654] pc : [<c12da820>] lr : [<c10ea4a4>] psr: 800b0013 [ 341.216957] sp : e99ad6cc ip : 00000002 fp : e99ad83c [ 341.222212] r10: d1bdc000 r9 : 00000001 r8 : 00000000 [ 341.227467] r7 : cd1de000 r6 : 00000000 r5 : d1bdc000 r4 : 00000000 [ 341.234032] r3 : 00000000 r2 : 80000000 r1 : 00000000 r0 : cd1de000 [ 341.240597] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 341.247771] Control: 30c5387d Table: 91b19880 DAC: fffffffd [ 341.253553] Process test_sockmap (pid: 6773, stack limit = 0x3ad4028c) [ 341.260118] Stack: (0xe99ad6cc to 0xe99ae000) [ 341.264502] d6c0: cd1de000 00000000 c10ea4a4 00000000 00000000 [ 341.272725] d6e0: 00000000 00000000 00000000 00000000 00000000 00000000 ea2759a0 00000001 [ 341.280948] d700: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.289171] d720: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.297394] d740: 00000000 00000000 00000000 00000000 00000000 00000000 e99ad78c d03f0580 [ 341.305615] d760: 00000004 d03f0000 00000007 000003a9 00000000 00000000 00000000 00000000 [ 341.313836] d780: 00000000 00000000 00000000 00000000 d03f0000 c0581f6c 00000060 c1e09fd0 [ 341.322060] d7a0: e99ad85c e99ad7b0 c04c1d1c 00000000 c06c3638 c1dc19b8 e99ad7ec d03f0540 [ 341.330283] d7c0: 00000002 d03f0000 00000007 000003a9 00000001 d03f0560 d03f0000 e3444ce4 [ 341.338506] d7e0: 00000060 c1e09fd0 e99ad8a4 e99ad7f8 cbc66e00 e99ad8a8 c1419868 c059b69c [ 341.346730] d800: 00000000 00000000 e99ad824 e99ad818 c04e3b7c f006b240 e99ad8b8 c1419868 [ 341.354954] d820: c10e9d98 00000000 00000000 c0581ddc e99ad894 e99ad840 c0581f6c c10e9da4 [ 341.363175] d840: 00000000 00000000 00000000 00000000 00000000 00000000 f5388145 290412b8 [ 341.371399] d860: c2432908 00000000 f08d7937 c1e08488 f006b028 00000011 c11cd828 f006b000 [ 341.379620] d880: e99ad9e4 c1fc9e37 e99ad934 e99ad898 c0584910 c0581e48 00000000 00000000 [ 341.387841] d8a0: 00000005 00000004 00000003 00000002 00000001 00000000 cbc66ee8 00000000 [ 341.396063] d8c0: d1bdc000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.404286] d8e0: 00000000 00000000 d1bdc000 00000000 cbc66ee0 00000000 00000007 00000006 [ 341.412509] d900: 00000010 c1fc9e37 e99ad8b8 00000000 cf380840 c10fdef4 c11cd828 9fdbe7c7 [ 341.420732] d920: d1bdc000 d1bdc000 e99ad984 e99ad938 c10fdf18 c05848d0 00000000 00000000 [ 341.428954] d940: c10fde14 c0459978 e99ad97c e99ad958 c056165c e7bdd400 000001ff d1bdc000 [ 341.437178] d960: e7bdd400 00000011 cf380840 00000000 e99ad9e4 c1fc9e37 e99ad9cc e99ad988 [ 341.445407] d980: c11cd828 c10fde20 c11cda3c 00000000 00000000 e99ad9a0 00000000 00000000 [ 341.453631] d9a0: 00000001 e7bdd400 cf380840 eb6d1030 c1e08488 00000000 00000003 c1fc9e37 [ 341.461855] d9c0: e99adcac e99ad9d0 c11cdb60 c11cd518 00000000 00000000 c11cd90c e8577024 [ 341.470078] d9e0: 00000020 00000001 00000000 00000000 00000001 00000001 00000000 00000001 [ 341.478300] da00: 00000000 00000000 00000000 00000000 eb6d1030 00000000 00000001 00000000 [ 341.486522] da20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.494742] da40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.502965] da60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.511184] da80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 341.519406] daa0: 00000000 00000000 00000000 00000000 00000000 00000087 00000001 d03f0500 [ 341.527628] dac0: d03f0000 c1e47f04 00000000 c1e09fd0 e99adb8c e99adae0 c04c1d1c c04c10d0 [ 341.535850] dae0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000078 [ 341.544074] db00: d03f04f0 00000087 00000000 00000000 c2432908 c2638640 00000087 d03f0500 [ 341.552296] db20: c1e08488 c2418b30 406293ec 295bca2f 00000000 00000000 00000000 00000000 [ 341.560517] db40: 00000000 00000000 d03f04f0 00000078 e99adb84 e99adb60 c040e488 00000087 [ 341.568741] db60: 00000001 d03f0500 d03f0000 c1e47f04 00000000 c1e09fd0 e99adc34 e99adb88 [ 341.576961] db80: c04c1d1c c04c10d0 ffffe000 c1fcaf30 c069cddc c1e47f04 e99adbbc e99adba8 [ 341.585182] dba0: c04c19e0 c04c1864 d03f04f0 00000087 00000000 00000000 c2432908 c2638640 [ 341.593405] dbc0: 00000087 d03f0500 c1e08488 c2418b30 406293ec 295bca2f e99adc24 e99adbe8 [ 341.601628] dbe0: c04fe13c c05615d4 00000001 00000000 c069cddc e99adc54 e99adc2c e99adc08 [ 341.609851] dc00: c040e488 c040ce94 c1e08488 00000000 ffffe000 c1fcaf30 c069cddc c1e47f04 [ 341.618073] dc20: e99adc64 e99adc30 d03f0000 c04fe13c ffffe000 c1fcaf30 c069cddc c1e47f04 [ 341.626294] dc40: e99adc64 e99adc50 c04c19e0 c04c1864 c1dc1000 c04fe13c e99adc8c e99adc68 [ 341.634517] dc60: c056165c c04c18d8 c1e47e40 400b0013 00000001 e99adce0 c069cddc 9fdbe7c7 [ 341.642738] dc80: e99adccc cf380840 c11cd90c e776d400 eb6d1030 00000010 00000001 c1938660 [ 341.650959] dca0: e99adcf4 e99adcb0 c119c98c c11cd918 00000000 e3444a98 e99add14 e99adcd0 [ 341.659180] dcc0: c069ce08 c069cd10 5cf61726 c119c908 c10933a0 00000000 00000000 c06b7624 [ 341.667403] dce0: 00000001 c1938660 e99add14 e99adcf8 c1093390 c119c914 00000000 e3444a98 [ 341.675624] dd00: e7cd5110 c1e08488 e99add2c e99add18 c10933d8 c1093368 00000000 0000026d [ 341.683846] dd20: e99add64 e99add30 c06b7694 c10933ac e99add38 00000000 00000000 00000000 [ 341.692067] dd40: c1e08488 9fdbe7c7 e7bdc800 e99adda0 d3b2fcc0 00000018 e99add9c e99add68 [ 341.700289] dd60: c06b8a04 c06b7630 e99ade60 00000000 00000000 c1e08488 d3b2fcc0 c06b7624 [ 341.708510] dd80: e68598c0 00000000 00000001 e99adf20 e99addfc e99adda0 c06b9214 c06b897c [ 341.716731] dda0: 00000001 00000001 00000000 e68598c0 00000000 00000000 00000000 00000000 [ 341.724953] ddc0: 00000000 00000000 00000000 9fdbe7c7 00000000 c06b9240 e99adea0 00000001 [ 341.733176] dde0: 00000000 00000010 00000000 00000001 e99ade14 e99ade00 c06b9270 c06b91a4 [ 341.741398] de00: 00000000 c06b7624 e99ade34 e99ade18 c06b761c c06b924c 00000000 e99adea0 [ 341.749621] de20: 00000001 d3b2fcc0 e99ade9c e99ade38 c06b7ff0 c06b75dc 00000000 c067a2dc [ 341.757842] de40: 00000001 c1e08488 00000000 c06b75d0 00000000 e9949a00 00000010 00000000 [ 341.766065] de60: 00000011 00000000 e99adf1c 9fdbe7c7 00020000 c1e08488 e99adf18 00000010 [ 341.774285] de80: 00000000 e9949a00 e99adf20 e68598c0 e99adef4 e99adea0 c06b8238 c06b7edc [ 341.782507] dea0: 00000001 00000001 00000000 e68598c0 00000010 00000000 e99adf20 00000000 [ 341.790729] dec0: 00000000 00000000 d03f0000 9fdbe7c7 c1e08488 c1e08488 e9949a00 fffff000 [ 341.798952] dee0: 00000fff 00000001 e99adf5c e99adef8 c067ac74 c06b8198 00000001 00000000 [ 341.807174] df00: e776d420 00000000 00000000 00000000 e68598c0 e9949a00 00000010 00000000 [ 341.815397] df20: 00000000 00000000 c1e08488 9fdbe7c7 00000001 c1e08488 00000001 00000000 [ 341.823618] df40: 00000000 c04011c4 0000001e 00000001 e99adfa4 e99adf60 c067c2a4 c067aaa4 [ 341.831841] df60: fffff000 00000fff e99adfac e99adf78 c1dc1000 9fdbe7c7 e99adfac bef7ca44 [ 341.840063] df80: 00000001 00000200 000000bb c04011c4 e99ac000 000000bb 00000000 e99adfa8 [ 341.848285] dfa0: c0401000 c067c1b8 bef7ca44 00000001 0000001a 0000001e 00000000 00000001 [ 341.856508] dfc0: bef7ca44 00000001 00000200 000000bb 00000001 0000001e 0000001a 00000010 [ 341.864729] dfe0: 00045034 bef7c884 000137c0 b6e76d7c 200b0010 0000001a 00000000 00000000 [ 341.872948] Backtrace: [ 341.875425] [<c10e9d98>] (bpf_msg_push_data) from [<c0581f6c>] (___bpf_prog_run+0x130/0x1bbc) [ 341.883999] r10:c0581ddc r9:00000000 r8:00000000 r7:c10e9d98 r6:c1419868 r5:e99ad8b8 [ 341.891869] r4:f006b240 [ 341.894426] [<c0581e3c>] (___bpf_prog_run) from [<c0584910>] (__bpf_prog_run32+0x4c/0x68) [ 341.902649] r10:c1fc9e37 r9:e99ad9e4 r8:f006b000 r7:c11cd828 r6:00000011 r5:f006b028 [ 341.910520] r4:c1e08488 [ 341.913079] [<c05848c4>] (__bpf_prog_run32) from [<c10fdf18>] (sk_psock_msg_verdict+0x104/0x354) [ 341.921909] r4:d1bdc000 [ 341.924470] [<c10fde14>] (sk_psock_msg_verdict) from [<c11cd828>] (tcp_bpf_send_verdict+0x31c/0x400) [ 341.933654] r10:c1fc9e37 r9:e99ad9e4 r8:00000000 r7:cf380840 r6:00000011 r5:e7bdd400 [ 341.941524] r4:d1bdc000 [ 341.944083] [<c11cd50c>] (tcp_bpf_send_verdict) from [<c11cdb60>] (tcp_bpf_sendpage+0x254/0x3c4) [ 341.952914] r10:c1fc9e37 r9:00000003 r8:00000000 r7:c1e08488 r6:eb6d1030 r5:cf380840 [ 341.960784] r4:e7bdd400 [ 341.963343] [<c11cd90c>] (tcp_bpf_sendpage) from [<c119c98c>] (inet_sendpage+0x84/0x294) [ 341.971480] r10:c1938660 r9:00000001 r8:00000010 r7:eb6d1030 r6:e776d400 r5:c11cd90c [ 341.979350] r4:cf380840 [ 341.981906] [<c119c908>] (inet_sendpage) from [<c1093390>] (kernel_sendpage+0x34/0x44) [ 341.989868] r10:c1938660 r9:00000001 r8:c06b7624 r7:00000000 r6:00000000 r5:c10933a0 [ 341.997738] r4:c119c908 [ 342.000290] [<c109335c>] (kernel_sendpage) from [<c10933d8>] (sock_sendpage+0x38/0x40) [ 342.008248] r4:c1e08488 [ 342.010805] [<c10933a0>] (sock_sendpage) from [<c06b7694>] (pipe_to_sendpage+0x70/0xa4) [ 342.018856] [<c06b7624>] (pipe_to_sendpage) from [<c06b8a04>] (__splice_from_pipe+0x94/0x1cc) [ 342.027424] r7:00000018 r6:d3b2fcc0 r5:e99adda0 r4:e7bdc800 [ 342.033122] [<c06b8970>] (__splice_from_pipe) from [<c06b9214>] (splice_from_pipe+0x7c/0xa8) [ 342.041605] r10:e99adf20 r9:00000001 r8:00000000 r7:e68598c0 r6:c06b7624 r5:d3b2fcc0 [ 342.049475] r4:c1e08488 [ 342.052032] [<c06b9198>] (splice_from_pipe) from [<c06b9270>] (generic_splice_sendpage+0x30/0x38) [ 342.060953] r10:00000001 r9:00000000 r8:00000010 r7:00000000 r6:00000001 r5:e99adea0 [ 342.068822] r4:c06b9240 [ 342.071377] [<c06b9240>] (generic_splice_sendpage) from [<c06b761c>] (direct_splice_actor+0x4c/0x54) [ 342.080562] [<c06b75d0>] (direct_splice_actor) from [<c06b7ff0>] (splice_direct_to_actor+0x120/0x2bc) [ 342.089827] r4:d3b2fcc0 [ 342.092383] [<c06b7ed0>] (splice_direct_to_actor) from [<c06b8238>] (do_splice_direct+0xac/0xe4) [ 342.101218] r10:e68598c0 r9:e99adf20 r8:e9949a00 r7:00000000 r6:00000010 r5:e99adf18 [ 342.109088] r4:c1e08488 [ 342.111645] [<c06b818c>] (do_splice_direct) from [<c067ac74>] (do_sendfile+0x1dc/0x420) [ 342.119693] r8:00000001 r7:00000fff r6:fffff000 r5:e9949a00 r4:c1e08488 [ 342.126436] [<c067aa98>] (do_sendfile) from [<c067c2a4>] (sys_sendfile+0xf8/0x11c) [ 342.134048] r10:00000001 r9:0000001e r8:c04011c4 r7:00000000 r6:00000000 r5:00000001 [ 342.141917] r4:c1e08488 [ 342.144475] [<c067c1ac>] (sys_sendfile) from [<c0401000>] (ret_fast_syscall+0x0/0x28) [ 342.152346] Exception stack(0xe99adfa8 to 0xe99adff0) [ 342.157428] dfa0: bef7ca44 00000001 0000001a 0000001e 00000000 00000001 [ 342.165650] dfc0: bef7ca44 00000001 00000200 000000bb 00000001 0000001e 0000001a 00000010 [ 342.173870] dfe0: 00045034 bef7c884 000137c0 b6e76d7c [ 342.178951] r10:000000bb r9:e99ac000 r8:c04011c4 r7:000000bb r6:00000200 r5:00000001 [ 342.186822] r4:bef7ca44 [ 342.189377] Code: e4808004 e480e004 e8bd01e0 e1b02f82 (14d13001) [ 342.195755] ---[ end trace d2353d98cf59813b ]--- [1] https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190604/testru…

6 years, 6 months

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[PATCH v2 18/22] docs: move protection-keys.rst to the core-api book

by Mauro Carvalho Chehab

This document is used by multiple architectures: $ echo $(git grep -l pkey_mprotect arch|cut -d'/' -f 2|sort|uniq) alpha arm arm64 ia64 m68k microblaze mips parisc powerpc s390 sh sparc x86 xtensa So, let's move it to the core book and adjust the links to it accordingly. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung(a)kernel.org> --- Documentation/core-api/index.rst | 1 + Documentation/{x86 => core-api}/protection-keys.rst | 0 Documentation/x86/index.rst | 1 - arch/powerpc/Kconfig | 2 +- arch/x86/Kconfig | 2 +- tools/testing/selftests/x86/protection_keys.c | 2 +- 6 files changed, 4 insertions(+), 4 deletions(-) rename Documentation/{x86 => core-api}/protection-keys.rst (100%) diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst index ee1bb8983a88..2466a4c51031 100644 --- a/Documentation/core-api/index.rst +++ b/Documentation/core-api/index.rst @@ -34,6 +34,7 @@ Core utilities timekeeping boot-time-mm memory-hotplug + protection-keys Interfaces for kernel debugging diff --git a/Documentation/x86/protection-keys.rst b/Documentation/core-api/protection-keys.rst similarity index 100% rename from Documentation/x86/protection-keys.rst rename to Documentation/core-api/protection-keys.rst diff --git a/Documentation/x86/index.rst b/Documentation/x86/index.rst index ae36fc5fc649..f2de1b2d3ac7 100644 --- a/Documentation/x86/index.rst +++ b/Documentation/x86/index.rst @@ -19,7 +19,6 @@ x86-specific Documentation tlb mtrr pat - protection-keys intel_mpx amd-memory-encryption pti diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 1120ff8ac715..e437aa3e78b4 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -898,7 +898,7 @@ config PPC_MEM_KEYS page-based protections, but without requiring modification of the page tables when an application changes protection domains. - For details, see Documentation/vm/protection-keys.rst + For details, see Documentation/core-api/protection-keys.rst If unsure, say y. diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 23de3b9da480..61244bdb886f 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1911,7 +1911,7 @@ config X86_INTEL_MEMORY_PROTECTION_KEYS page-based protections, but without requiring modification of the page tables when an application changes protection domains. - For details, see Documentation/x86/protection-keys.txt + For details, see Documentation/core-api/protection-keys.rst If unsure, say y. diff --git a/tools/testing/selftests/x86/protection_keys.c b/tools/testing/selftests/x86/protection_keys.c index 5d546dcdbc80..480995bceefa 100644 --- a/tools/testing/selftests/x86/protection_keys.c +++ b/tools/testing/selftests/x86/protection_keys.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Tests x86 Memory Protection Keys (see Documentation/x86/protection-keys.txt) + * Tests x86 Memory Protection Keys (see Documentation/core-api/protection-keys.rst) * * There are examples in here of: * * how to set protection keys on memory -- 2.21.0

6 years, 6 months

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[PATCH v15 00/17] arm64: untag user pointers passed to the kernel

by Andrey Konovalov

=== Overview arm64 has a feature called Top Byte Ignore, which allows to embed pointer tags into the top byte of each pointer. Userspace programs (such as HWASan, a memory debugging tool [1]) might use this feature and pass tagged user pointers to the kernel through syscalls or other interfaces. Right now the kernel is already able to handle user faults with tagged pointers, due to these patches: 1. 81cddd65 ("arm64: traps: fix userspace cache maintenance emulation on a tagged pointer") 2. 7dcd9dd8 ("arm64: hw_breakpoint: fix watchpoint matching for tagged pointers") 3. 276e9327 ("arm64: entry: improve data abort handling of tagged pointers") This patchset extends tagged pointer support to syscall arguments. As per the proposed ABI change [3], tagged pointers are only allowed to be passed to syscalls when they point to memory ranges obtained by anonymous mmap() or sbrk() (see the patchset [3] for more details). For non-memory syscalls this is done by untaging user pointers when the kernel performs pointer checking to find out whether the pointer comes from userspace (most notably in access_ok). The untagging is done only when the pointer is being checked, the tag is preserved as the pointer makes its way through the kernel and stays tagged when the kernel dereferences the pointer when perfoming user memory accesses. Memory syscalls (mmap, mprotect, etc.) don't do user memory accesses but rather deal with memory ranges, and untagged pointers are better suited to describe memory ranges internally. Thus for memory syscalls we untag pointers completely when they enter the kernel. === Other approaches One of the alternative approaches to untagging that was considered is to completely strip the pointer tag as the pointer enters the kernel with some kind of a syscall wrapper, but that won't work with the countless number of different ioctl calls. With this approach we would need a custom wrapper for each ioctl variation, which doesn't seem practical. An alternative approach to untagging pointers in memory syscalls prologues is to inspead allow tagged pointers to be passed to find_vma() (and other vma related functions) and untag them there. Unfortunately, a lot of find_vma() callers then compare or subtract the returned vma start and end fields against the pointer that was being searched. Thus this approach would still require changing all find_vma() callers. === Testing The following testing approaches has been taken to find potential issues with user pointer untagging: 1. Static testing (with sparse [2] and separately with a custom static analyzer based on Clang) to track casts of __user pointers to integer types to find places where untagging needs to be done. 2. Static testing with grep to find parts of the kernel that call find_vma() (and other similar functions) or directly compare against vm_start/vm_end fields of vma. 3. Static testing with grep to find parts of the kernel that compare user pointers with TASK_SIZE or other similar consts and macros. 4. Dynamic testing: adding BUG_ON(has_tag(addr)) to find_vma() and running a modified syzkaller version that passes tagged pointers to the kernel. Based on the results of the testing the requried patches have been added to the patchset. === Notes This patchset is meant to be merged together with "arm64 relaxed ABI" [3]. This patchset is a prerequisite for ARM's memory tagging hardware feature support [4]. This patchset has been merged into the Pixel 2 & 3 kernel trees and is now being used to enable testing of Pixel phones with HWASan. Thanks! [1] http://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html [2] https://github.com/lucvoo/sparse-dev/commit/5f960cb10f56ec2017c128ef9d16060… [3] https://lkml.org/lkml/2019/3/18/819 [4] https://community.arm.com/processors/b/blog/posts/arm-a-profile-architectur… Changes in v15: - Removed unnecessary untagging from radeon_ttm_tt_set_userptr(). - Removed unnecessary untagging from amdgpu_ttm_tt_set_userptr(). - Moved untagging to validate_range() in userfaultfd code. - Moved untagging to ib_uverbs_(re)reg_mr() from mlx4_get_umem_mr(). - Rebased onto 5.1. Changes in v14: - Moved untagging for most memory syscalls to an arm64 specific implementation, instead of doing that in the common code. - Dropped "net, arm64: untag user pointers in tcp_zerocopy_receive", since the provided user pointers don't come from an anonymous map and thus are not covered by this ABI relaxation. - Dropped "kernel, arm64: untag user pointers in prctl_set_mm*". - Moved untagging from __check_mem_type() to tee_shm_register(). - Updated untagging for the amdgpu and radeon drivers to cover the MMU notifier, as suggested by Felix. - Since this ABI relaxation doesn't actually allow tagged instruction pointers, dropped the following patches: - Dropped "tracing, arm64: untag user pointers in seq_print_user_ip". - Dropped "uprobes, arm64: untag user pointers in find_active_uprobe". - Dropped "bpf, arm64: untag user pointers in stack_map_get_build_id_offset". - Rebased onto 5.1-rc7 (37624b58). Changes in v13: - Simplified untagging in tcp_zerocopy_receive(). - Looked at find_vma() callers in drivers/, which allowed to identify a few other places where untagging is needed. - Added patch "mm, arm64: untag user pointers in get_vaddr_frames". - Added patch "drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages". - Added patch "drm/radeon, arm64: untag user pointers in radeon_ttm_tt_pin_userptr". - Added patch "IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr". - Added patch "media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get". - Added patch "tee/optee, arm64: untag user pointers in check_mem_type". - Added patch "vfio/type1, arm64: untag user pointers". Changes in v12: - Changed untagging in tcp_zerocopy_receive() to also untag zc->address. - Fixed untagging in prctl_set_mm* to only untag pointers for vma lookups and validity checks, but leave them as is for actual user space accesses. - Updated the link to the v2 of the "arm64 relaxed ABI" patchset [3]. - Dropped the documentation patch, as the "arm64 relaxed ABI" patchset [3] handles that. Changes in v11: - Added "uprobes, arm64: untag user pointers in find_active_uprobe" patch. - Added "bpf, arm64: untag user pointers in stack_map_get_build_id_offset" patch. - Fixed "tracing, arm64: untag user pointers in seq_print_user_ip" to correctly perform subtration with a tagged addr. - Moved untagged_addr() from SYSCALL_DEFINE3(mprotect) and SYSCALL_DEFINE4(pkey_mprotect) to do_mprotect_pkey(). - Moved untagged_addr() definition for other arches from include/linux/memory.h to include/linux/mm.h. - Changed untagging in strn*_user() to perform userspace accesses through tagged pointers. - Updated the documentation to mention that passing tagged pointers to memory syscalls is allowed. - Updated the test to use malloc'ed memory instead of stack memory. Changes in v10: - Added "mm, arm64: untag user pointers passed to memory syscalls" back. - New patch "fs, arm64: untag user pointers in fs/userfaultfd.c". - New patch "net, arm64: untag user pointers in tcp_zerocopy_receive". - New patch "kernel, arm64: untag user pointers in prctl_set_mm*". - New patch "tracing, arm64: untag user pointers in seq_print_user_ip". Changes in v9: - Rebased onto 4.20-rc6. - Used u64 instead of __u64 in type casts in the untagged_addr macro for arm64. - Added braces around (addr) in the untagged_addr macro for other arches. Changes in v8: - Rebased onto 65102238 (4.20-rc1). - Added a note to the cover letter on why syscall wrappers/shims that untag user pointers won't work. - Added a note to the cover letter that this patchset has been merged into the Pixel 2 kernel tree. - Documentation fixes, in particular added a list of syscalls that don't support tagged user pointers. Changes in v7: - Rebased onto 17b57b18 (4.19-rc6). - Dropped the "arm64: untag user address in __do_user_fault" patch, since the existing patches already handle user faults properly. - Dropped the "usb, arm64: untag user addresses in devio" patch, since the passed pointer must come from a vma and therefore be untagged. - Dropped the "arm64: annotate user pointers casts detected by sparse" patch (see the discussion to the replies of the v6 of this patchset). - Added more context to the cover letter. - Updated Documentation/arm64/tagged-pointers.txt. Changes in v6: - Added annotations for user pointer casts found by sparse. - Rebased onto 050cdc6c (4.19-rc1+). Changes in v5: - Added 3 new patches that add untagging to places found with static analysis. - Rebased onto 44c929e1 (4.18-rc8). Changes in v4: - Added a selftest for checking that passing tagged pointers to the kernel succeeds. - Rebased onto 81e97f013 (4.18-rc1+). Changes in v3: - Rebased onto e5c51f30 (4.17-rc6+). - Added linux-arch@ to the list of recipients. Changes in v2: - Rebased onto 2d618bdf (4.17-rc3+). - Removed excessive untagging in gup.c. - Removed untagging pointers returned from __uaccess_mask_ptr. Changes in v1: - Rebased onto 4.17-rc1. Changes in RFC v2: - Added "#ifndef untagged_addr..." fallback in linux/uaccess.h instead of defining it for each arch individually. - Updated Documentation/arm64/tagged-pointers.txt. - Dropped "mm, arm64: untag user addresses in memory syscalls". - Rebased onto 3eb2ce82 (4.16-rc7). Signed-off-by: Andrey Konovalov <andreyknvl(a)google.com> Andrey Konovalov (17): uaccess: add untagged_addr definition for other arches arm64: untag user pointers in access_ok and __uaccess_mask_ptr lib, arm64: untag user pointers in strn*_user mm: add ksys_ wrappers to memory syscalls arms64: untag user pointers passed to memory syscalls mm: untag user pointers in do_pages_move mm, arm64: untag user pointers in mm/gup.c mm, arm64: untag user pointers in get_vaddr_frames fs, arm64: untag user pointers in copy_mount_options fs, arm64: untag user pointers in fs/userfaultfd.c drm/amdgpu, arm64: untag user pointers drm/radeon, arm64: untag user pointers in radeon_gem_userptr_ioctl IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get tee, arm64: untag user pointers in tee_shm_register vfio/type1, arm64: untag user pointers in vaddr_get_pfn selftests, arm64: add a selftest for passing tagged pointers to kernel arch/arm64/include/asm/uaccess.h | 10 +- arch/arm64/kernel/sys.c | 128 ++++++++++++++++- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 + drivers/gpu/drm/radeon/radeon_gem.c | 2 + drivers/infiniband/core/uverbs_cmd.c | 4 + drivers/media/v4l2-core/videobuf-dma-contig.c | 9 +- drivers/tee/tee_shm.c | 1 + drivers/vfio/vfio_iommu_type1.c | 2 + fs/namespace.c | 2 +- fs/userfaultfd.c | 22 +-- include/linux/mm.h | 4 + include/linux/syscalls.h | 22 +++ ipc/shm.c | 7 +- lib/strncpy_from_user.c | 3 +- lib/strnlen_user.c | 3 +- mm/frame_vector.c | 2 + mm/gup.c | 4 + mm/madvise.c | 129 +++++++++--------- mm/mempolicy.c | 21 ++- mm/migrate.c | 1 + mm/mincore.c | 57 ++++---- mm/mlock.c | 20 ++- mm/mmap.c | 30 +++- mm/mprotect.c | 6 +- mm/mremap.c | 27 ++-- mm/msync.c | 35 +++-- tools/testing/selftests/arm64/.gitignore | 1 + tools/testing/selftests/arm64/Makefile | 11 ++ .../testing/selftests/arm64/run_tags_test.sh | 12 ++ tools/testing/selftests/arm64/tags_test.c | 21 +++ 31 files changed, 436 insertions(+), 164 deletions(-) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_test.c -- 2.21.0.1020.gf2820cf01a-goog

6 years, 6 months

13
98
0 0

Re: [PATCH 22/22] docs: fix broken documentation links

by Michael S. Tsirkin

On Thu, May 30, 2019 at 10:17:32PM +0200, Federico Vaga wrote: > On Thursday, May 30, 2019 1:23:53 AM CEST Mauro Carvalho Chehab wrote: > > Mostly due to x86 and acpi conversion, several documentation > > links are still pointing to the old file. Fix them. > > For the Italian documentation I just send I patch to fix them in a dedicated > patch Acked-by: Michael S. Tsirkin <mst(a)redhat.com> for the vhost change. > > > > Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung(a)kernel.org> > > --- > > Documentation/acpi/dsd/leds.txt | 2 +- > > Documentation/admin-guide/kernel-parameters.rst | 6 +++--- > > Documentation/admin-guide/kernel-parameters.txt | 16 ++++++++-------- > > Documentation/admin-guide/ras.rst | 2 +- > > .../devicetree/bindings/net/fsl-enetc.txt | 7 +++---- > > .../bindings/pci/amlogic,meson-pcie.txt | 2 +- > > .../bindings/regulator/qcom,rpmh-regulator.txt | 2 +- > > Documentation/devicetree/booting-without-of.txt | 2 +- > > Documentation/driver-api/gpio/board.rst | 2 +- > > Documentation/driver-api/gpio/consumer.rst | 2 +- > > .../firmware-guide/acpi/enumeration.rst | 2 +- > > .../firmware-guide/acpi/method-tracing.rst | 2 +- > > Documentation/i2c/instantiating-devices | 2 +- > > Documentation/sysctl/kernel.txt | 4 ++-- > > .../translations/it_IT/process/howto.rst | 2 +- > > .../it_IT/process/stable-kernel-rules.rst | 4 ++-- > > .../translations/zh_CN/process/4.Coding.rst | 2 +- > > Documentation/x86/x86_64/5level-paging.rst | 2 +- > > Documentation/x86/x86_64/boot-options.rst | 4 ++-- > > .../x86/x86_64/fake-numa-for-cpusets.rst | 2 +- > > MAINTAINERS | 6 +++--- > > arch/arm/Kconfig | 2 +- > > arch/arm64/kernel/kexec_image.c | 2 +- > > arch/powerpc/Kconfig | 2 +- > > arch/x86/Kconfig | 16 ++++++++-------- > > arch/x86/Kconfig.debug | 2 +- > > arch/x86/boot/header.S | 2 +- > > arch/x86/entry/entry_64.S | 2 +- > > arch/x86/include/asm/bootparam_utils.h | 2 +- > > arch/x86/include/asm/page_64_types.h | 2 +- > > arch/x86/include/asm/pgtable_64_types.h | 2 +- > > arch/x86/kernel/cpu/microcode/amd.c | 2 +- > > arch/x86/kernel/kexec-bzimage64.c | 2 +- > > arch/x86/kernel/pci-dma.c | 2 +- > > arch/x86/mm/tlb.c | 2 +- > > arch/x86/platform/pvh/enlighten.c | 2 +- > > drivers/acpi/Kconfig | 10 +++++----- > > drivers/net/ethernet/faraday/ftgmac100.c | 2 +- > > .../fieldbus/Documentation/fieldbus_dev.txt | 4 ++-- > > drivers/vhost/vhost.c | 2 +- > > include/acpi/acpi_drivers.h | 2 +- > > include/linux/fs_context.h | 2 +- > > include/linux/lsm_hooks.h | 2 +- > > mm/Kconfig | 2 +- > > security/Kconfig | 2 +- > > tools/include/linux/err.h | 2 +- > > tools/objtool/Documentation/stack-validation.txt | 4 ++-- > > tools/testing/selftests/x86/protection_keys.c | 2 +- > > 48 files changed, 77 insertions(+), 78 deletions(-) > > > > diff --git a/Documentation/acpi/dsd/leds.txt > > b/Documentation/acpi/dsd/leds.txt index 81a63af42ed2..cc58b1a574c5 100644 > > --- a/Documentation/acpi/dsd/leds.txt > > +++ b/Documentation/acpi/dsd/leds.txt > > @@ -96,4 +96,4 @@ where > > > > <URL:http://www.uefi.org/sites/default/files/resources/_DSD-hierarchical-da > > ta-extension-UUID-v1.1.pdf>, referenced 2019-02-21. > > > > -[7] Documentation/acpi/dsd/data-node-reference.txt > > +[7] Documentation/firmware-guide/acpi/dsd/data-node-references.rst > > diff --git a/Documentation/admin-guide/kernel-parameters.rst > > b/Documentation/admin-guide/kernel-parameters.rst index > > 0124980dca2d..8d3273e32eb1 100644 > > --- a/Documentation/admin-guide/kernel-parameters.rst > > +++ b/Documentation/admin-guide/kernel-parameters.rst > > @@ -167,7 +167,7 @@ parameter is applicable:: > > X86-32 X86-32, aka i386 architecture is enabled. > > X86-64 X86-64 architecture is enabled. > > More X86-64 boot options can be found in > > - Documentation/x86/x86_64/boot-options.txt > . > > + Documentation/x86/x86_64/boot-options.rst. > > X86 Either 32-bit or 64-bit x86 (same as X86-32+X86-64) > > X86_UV SGI UV support is enabled. > > XEN Xen support is enabled > > @@ -181,10 +181,10 @@ In addition, the following text indicates that the > > option:: Parameters denoted with BOOT are actually interpreted by the boot > > loader, and have no meaning to the kernel directly. > > Do not modify the syntax of boot loader parameters without extreme > > -need or coordination with <Documentation/x86/boot.txt>. > > +need or coordination with <Documentation/x86/boot.rst>. > > > > There are also arch-specific kernel-parameters not documented here. > > -See for example <Documentation/x86/x86_64/boot-options.txt>. > > +See for example <Documentation/x86/x86_64/boot-options.rst>. > > > > Note that ALL kernel parameters listed below are CASE SENSITIVE, and that > > a trailing = on the name of any parameter states that that parameter will > > diff --git a/Documentation/admin-guide/kernel-parameters.txt > > b/Documentation/admin-guide/kernel-parameters.txt index > > 138f6664b2e2..4a02d1346635 100644 > > --- a/Documentation/admin-guide/kernel-parameters.txt > > +++ b/Documentation/admin-guide/kernel-parameters.txt > > @@ -53,7 +53,7 @@ > > ACPI_DEBUG_PRINT statements, e.g., > > ACPI_DEBUG_PRINT((ACPI_DB_INFO, ... > > The debug_level mask defaults to "info". > See > > - Documentation/acpi/debug.txt for more > information about > > + Documentation/firmware-guide/acpi/debug.rst > for more information about > > debug layers and levels. > > > > Enable processor driver info messages: > > @@ -963,7 +963,7 @@ > > for details. > > > > nompx [X86] Disables Intel Memory Protection > Extensions. > > - See Documentation/x86/intel_mpx.txt for > more > > + See Documentation/x86/intel_mpx.rst for > more > > information about the feature. > > > > nopku [X86] Disable Memory Protection Keys CPU > feature found > > @@ -1189,7 +1189,7 @@ > > that is to be dynamically loaded by Linux. > If there are > > multiple variables with the same name but > with different > > vendor GUIDs, all of them will be loaded. > See > > - Documentation/acpi/ssdt-overlays.txt for > details. > > + Documentation/admin-guide/acpi/ssdt- > overlays.rst for details. > > > > > > eisa_irq_edge= [PARISC,HW] > > @@ -2383,7 +2383,7 @@ > > > > mce [X86-32] Machine Check Exception > > > > - mce=option [X86-64] See Documentation/x86/x86_64/boot- > options.txt > > + mce=option [X86-64] See Documentation/x86/x86_64/boot- > options.rst > > > > md= [HW] RAID subsystems devices and level > > See Documentation/admin-guide/md.rst. > > @@ -2439,7 +2439,7 @@ > > set according to the > > CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE > kernel config > > option. > > - See Documentation/memory-hotplug.txt. > > + See Documentation/admin-guide/mm/memory- > hotplug.rst. > > > > memmap=exactmap [KNL,X86] Enable setting of an exact > > E820 memory map, as specified by the user. > > @@ -2528,7 +2528,7 @@ > > mem_encrypt=on: Activate > SME > > mem_encrypt=off: Do not activate SME > > > > - Refer to Documentation/x86/amd-memory- > encryption.txt > > + Refer to Documentation/virtual/kvm/amd- > memory-encryption.rst > > for details on when memory encryption can > be activated. > > > > mem_sleep_default= [SUSPEND] Default system suspend mode: > > @@ -3528,7 +3528,7 @@ > > See Documentation/blockdev/paride.txt. > > > > pirq= [SMP,APIC] Manual mp-table setup > > - See Documentation/x86/i386/IO-APIC.txt. > > + See Documentation/x86/i386/IO-APIC.rst. > > > > plip= [PPT,NET] Parallel port network link > > Format: { parport<nr> | timid | 0 } > > @@ -5054,7 +5054,7 @@ > > Can be used multiple times for multiple > devices. > > > > vga= [BOOT,X86-32] Select a particular video > mode > > - See Documentation/x86/boot.txt and > > + See Documentation/x86/boot.rst and > > Documentation/svga.txt. > > Use vga=ask for menu. > > This is actually a boot loader parameter; > the value is > > diff --git a/Documentation/admin-guide/ras.rst > > b/Documentation/admin-guide/ras.rst index c7495e42e6f4..2b20f5f7380d 100644 > > --- a/Documentation/admin-guide/ras.rst > > +++ b/Documentation/admin-guide/ras.rst > > @@ -199,7 +199,7 @@ Architecture (MCA)\ [#f3]_. > > mode). > > > > .. [#f3] For more details about the Machine Check Architecture (MCA), > > - please read Documentation/x86/x86_64/machinecheck at the Kernel tree. > > + please read Documentation/x86/x86_64/machinecheck.rst at the Kernel tree. > > > > EDAC - Error Detection And Correction > > ************************************* > > diff --git a/Documentation/devicetree/bindings/net/fsl-enetc.txt > > b/Documentation/devicetree/bindings/net/fsl-enetc.txt index > > c812e25ae90f..25fc687419db 100644 > > --- a/Documentation/devicetree/bindings/net/fsl-enetc.txt > > +++ b/Documentation/devicetree/bindings/net/fsl-enetc.txt > > @@ -16,8 +16,8 @@ Required properties: > > In this case, the ENETC node should include a "mdio" sub-node > > that in turn should contain the "ethernet-phy" node describing the > > external phy. Below properties are required, their bindings > > -already defined in ethernet.txt or phy.txt, under > > -Documentation/devicetree/bindings/net/*. > > +already defined in Documentation/devicetree/bindings/net/ethernet.txt or > > +Documentation/devicetree/bindings/net/phy.txt. > > > > Required: > > > > @@ -51,8 +51,7 @@ Example: > > connection: > > > > In this case, the ENETC port node defines a fixed link connection, > > -as specified by "fixed-link.txt", under > > -Documentation/devicetree/bindings/net/*. > > +as specified by Documentation/devicetree/bindings/net/fixed-link.txt. > > > > Required: > > > > diff --git a/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt > > b/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt index > > 12b18f82d441..efa2c8b9b85a 100644 > > --- a/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt > > +++ b/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt > > @@ -3,7 +3,7 @@ Amlogic Meson AXG DWC PCIE SoC controller > > Amlogic Meson PCIe host controller is based on the Synopsys DesignWare PCI > > core. It shares common functions with the PCIe DesignWare core driver and > > inherits common properties defined in > > -Documentation/devicetree/bindings/pci/designware-pci.txt. > > +Documentation/devicetree/bindings/pci/designware-pcie.txt. > > > > Additional properties are described here: > > > > diff --git > > a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt > > b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt index > > 7ef2dbe48e8a..14d2eee96b3d 100644 > > --- a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt > > +++ b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt > > @@ -97,7 +97,7 @@ Second Level Nodes - Regulators > > sent for this regulator including those which are > for a > > strictly lower power state. > > > > -Other properties defined in Documentation/devicetree/bindings/regulator.txt > > +Other properties defined in > > Documentation/devicetree/bindings/regulator/regulator.txt may also be used. > > regulator-initial-mode and regulator-allowed-modes may be specified for > > VRM regulators using mode values from > > include/dt-bindings/regulator/qcom,rpmh-regulator.h. > > regulator-allow-bypass diff --git > > a/Documentation/devicetree/booting-without-of.txt > > b/Documentation/devicetree/booting-without-of.txt index > > e86bd2f64117..60f8640f2b2f 100644 > > --- a/Documentation/devicetree/booting-without-of.txt > > +++ b/Documentation/devicetree/booting-without-of.txt > > @@ -277,7 +277,7 @@ it with special cases. > > the decompressor (the real mode entry point goes to the same 32bit > > entry point once it switched into protected mode). That entry point > > supports one calling convention which is documented in > > - Documentation/x86/boot.txt > > + Documentation/x86/boot.rst > > The physical pointer to the device-tree block (defined in chapter II) > > is passed via setup_data which requires at least boot protocol 2.09. > > The type filed is defined as > > diff --git a/Documentation/driver-api/gpio/board.rst > > b/Documentation/driver-api/gpio/board.rst index b37f3f7b8926..ce91518bf9f4 > > 100644 > > --- a/Documentation/driver-api/gpio/board.rst > > +++ b/Documentation/driver-api/gpio/board.rst > > @@ -101,7 +101,7 @@ with the help of _DSD (Device Specific Data), introduced > > in ACPI 5.1:: } > > > > For more information about the ACPI GPIO bindings see > > -Documentation/acpi/gpio-properties.txt. > > +Documentation/firmware-guide/acpi/gpio-properties.rst. > > > > Platform Data > > ------------- > > diff --git a/Documentation/driver-api/gpio/consumer.rst > > b/Documentation/driver-api/gpio/consumer.rst index > > 5e4d8aa68913..fdecb6d711db 100644 > > --- a/Documentation/driver-api/gpio/consumer.rst > > +++ b/Documentation/driver-api/gpio/consumer.rst > > @@ -437,7 +437,7 @@ case, it will be handled by the GPIO subsystem > > automatically. However, if the _DSD is not present, the mappings between > > GpioIo()/GpioInt() resources and GPIO connection IDs need to be provided by > > device drivers. > > > > -For details refer to Documentation/acpi/gpio-properties.txt > > +For details refer to Documentation/firmware-guide/acpi/gpio-properties.rst > > > > > > Interacting With the Legacy GPIO Subsystem > > diff --git a/Documentation/firmware-guide/acpi/enumeration.rst > > b/Documentation/firmware-guide/acpi/enumeration.rst index > > 850be9696931..1252617b520f 100644 > > --- a/Documentation/firmware-guide/acpi/enumeration.rst > > +++ b/Documentation/firmware-guide/acpi/enumeration.rst > > @@ -339,7 +339,7 @@ a code like this:: > > There are also devm_* versions of these functions which release the > > descriptors once the device is released. > > > > -See Documentation/acpi/gpio-properties.txt for more information about the > > +See Documentation/firmware-guide/acpi/gpio-properties.rst for more > > information about the _DSD binding related to GPIOs. > > > > MFD devices > > diff --git a/Documentation/firmware-guide/acpi/method-tracing.rst > > b/Documentation/firmware-guide/acpi/method-tracing.rst index > > d0b077b73f5f..0aa7e2c5d32a 100644 > > --- a/Documentation/firmware-guide/acpi/method-tracing.rst > > +++ b/Documentation/firmware-guide/acpi/method-tracing.rst > > @@ -68,7 +68,7 @@ c. Filter out the debug layer/level matched logs when the > > specified > > > > Where: > > 0xXXXXXXXX/0xYYYYYYYY > > - Refer to Documentation/acpi/debug.txt for possible debug layer/level > > + Refer to Documentation/firmware-guide/acpi/debug.rst for possible > > debug layer/level masking values. > > \PPPP.AAAA.TTTT.HHHH > > Full path of a control method that can be found in the ACPI namespace. > > diff --git a/Documentation/i2c/instantiating-devices > > b/Documentation/i2c/instantiating-devices index 0d85ac1935b7..5a3e2f331e8c > > 100644 > > --- a/Documentation/i2c/instantiating-devices > > +++ b/Documentation/i2c/instantiating-devices > > @@ -85,7 +85,7 @@ Method 1c: Declare the I2C devices via ACPI > > ------------------------------------------- > > > > ACPI can also describe I2C devices. There is special documentation for this > > -which is currently located at Documentation/acpi/enumeration.txt. +which > > is currently located at Documentation/firmware-guide/acpi/enumeration.rst. > > > > > > Method 2: Instantiate the devices explicitly > > diff --git a/Documentation/sysctl/kernel.txt > > b/Documentation/sysctl/kernel.txt index f0c86fbb3b48..92f7f34b021a 100644 > > --- a/Documentation/sysctl/kernel.txt > > +++ b/Documentation/sysctl/kernel.txt > > @@ -155,7 +155,7 @@ is 0x15 and the full version number is 0x234, this file > > will contain the value 340 = 0x154. > > > > See the type_of_loader and ext_loader_type fields in > > -Documentation/x86/boot.txt for additional information. > > +Documentation/x86/boot.rst for additional information. > > > > ============================================================== > > > > @@ -167,7 +167,7 @@ The complete bootloader version number. In the example > > above, this file will contain the value 564 = 0x234. > > > > See the type_of_loader and ext_loader_ver fields in > > -Documentation/x86/boot.txt for additional information. > > +Documentation/x86/boot.rst for additional information. > > > > ============================================================== > > > > diff --git a/Documentation/translations/it_IT/process/howto.rst > > b/Documentation/translations/it_IT/process/howto.rst index > > 9903ac7c566b..44e6077730e8 100644 > > --- a/Documentation/translations/it_IT/process/howto.rst > > +++ b/Documentation/translations/it_IT/process/howto.rst > > @@ -131,7 +131,7 @@ Di seguito una lista di file che sono presenti nei > > sorgente del kernel e che "Linux kernel patch submission format" > > http://linux.yyz.us/patch-format.html > > > > - :ref:`Documentation/process/translations/it_IT/stable-api-nonsense.rst > > <it_stable_api_nonsense>` + > > :ref:`Documentation/translations/it_IT/process/stable-api-nonsense.rst > > <it_stable_api_nonsense>` > > > > Questo file descrive la motivazioni sottostanti la conscia decisione di > > non avere un API stabile all'interno del kernel, incluso cose come: diff > > --git a/Documentation/translations/it_IT/process/stable-kernel-rules.rst > > b/Documentation/translations/it_IT/process/stable-kernel-rules.rst index > > 48e88e5ad2c5..4f206cee31a7 100644 > > --- a/Documentation/translations/it_IT/process/stable-kernel-rules.rst > > +++ b/Documentation/translations/it_IT/process/stable-kernel-rules.rst > > @@ -33,7 +33,7 @@ Regole sul tipo di patch che vengono o non vengono > > accettate nei sorgenti - Non deve includere alcuna correzione "banale" > > (correzioni grammaticali, pulizia dagli spazi bianchi, eccetera). > > - Deve rispettare le regole scritte in > > - :ref:`Documentation/translation/it_IT/process/submitting-patches.rst > > <it_submittingpatches>` + > > :ref:`Documentation/translations/it_IT/process/submitting-patches.rst > > <it_submittingpatches>` - Questa patch o una equivalente deve esistere già > > nei sorgenti principali di Linux > > > > @@ -43,7 +43,7 @@ Procedura per sottomettere patch per i sorgenti -stable > > > > - Se la patch contiene modifiche a dei file nelle cartelle net/ o > > drivers/net, allora seguite le linee guida descritte in > > - :ref:`Documentation/translation/it_IT/networking/netdev-FAQ.rst > > <it_netdev-FAQ>`; + > > :ref:`Documentation/translations/it_IT/networking/netdev-FAQ.rst > > <it_netdev-FAQ>`; ma solo dopo aver verificato al seguente indirizzo che la > > patch non sia già in coda: > > > > https://patchwork.ozlabs.org/bundle/davem/stable/?series=&submitter=&state= > > *&q=&archive= diff --git > > a/Documentation/translations/zh_CN/process/4.Coding.rst > > b/Documentation/translations/zh_CN/process/4.Coding.rst index > > 5301e9d55255..8bb777941394 100644 > > --- a/Documentation/translations/zh_CN/process/4.Coding.rst > > +++ b/Documentation/translations/zh_CN/process/4.Coding.rst > > @@ -241,7 +241,7 @@ scripts/coccinelle目录下已经打包了相当多的内核“语义补丁” > > > > 任何添加新用户空间界面的代码（包括新的sysfs或/proc文件）都应该包含该界面的 > > 文档，该文档使用户空间开发人员能够知道他们在使用什么。请参阅 > > -Documentation/abi/readme，了解如何格式化此文档以及需要提供哪些信息。 > > +Documentation/ABI/README，了解如何格式化此文档以及需要提供哪些信息。 > > > > 文件 :ref:`Documentation/admin-guide/kernel-parameters.rst > > <kernelparameters>` 描述了内核的所有引导时间参数。任何添加新参数的补丁都应该向该文件添加适当的 > > diff --git a/Documentation/x86/x86_64/5level-paging.rst > > b/Documentation/x86/x86_64/5level-paging.rst index > > ab88a4514163..44856417e6a5 100644 > > --- a/Documentation/x86/x86_64/5level-paging.rst > > +++ b/Documentation/x86/x86_64/5level-paging.rst > > @@ -20,7 +20,7 @@ physical address space. This "ought to be enough for > > anybody" ©. QEMU 2.9 and later support 5-level paging. > > > > Virtual memory layout for 5-level paging is described in > > -Documentation/x86/x86_64/mm.txt > > +Documentation/x86/x86_64/mm.rst > > > > > > Enabling 5-level paging > > diff --git a/Documentation/x86/x86_64/boot-options.rst > > b/Documentation/x86/x86_64/boot-options.rst index > > 2f69836b8445..6a4285a3c7a4 100644 > > --- a/Documentation/x86/x86_64/boot-options.rst > > +++ b/Documentation/x86/x86_64/boot-options.rst > > @@ -9,7 +9,7 @@ only the AMD64 specific ones are listed here. > > > > Machine check > > ============= > > -Please see Documentation/x86/x86_64/machinecheck for sysfs runtime > > tunables. +Please see Documentation/x86/x86_64/machinecheck.rst for sysfs > > runtime tunables. > > > > mce=off > > Disable machine check > > @@ -89,7 +89,7 @@ APICs > > Don't use the local APIC (alias for i386 compatibility) > > > > pirq=... > > - See Documentation/x86/i386/IO-APIC.txt > > + See Documentation/x86/i386/IO-APIC.rst > > > > noapictimer > > Don't set up the APIC timer > > diff --git a/Documentation/x86/x86_64/fake-numa-for-cpusets.rst > > b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst index > > 74fbb78b3c67..04df57b9aa3f 100644 > > --- a/Documentation/x86/x86_64/fake-numa-for-cpusets.rst > > +++ b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst > > @@ -18,7 +18,7 @@ For more information on the features of cpusets, see > > Documentation/cgroup-v1/cpusets.txt. > > There are a number of different configurations you can use for your needs. > > For more information on the numa=fake command line option and its various > > ways of -configuring fake nodes, see > > Documentation/x86/x86_64/boot-options.txt. +configuring fake nodes, see > > Documentation/x86/x86_64/boot-options.rst. > > > > For the purposes of this introduction, we'll assume a very primitive NUMA > > emulation setup of "numa=fake=4*512,". This will split our system memory > > into diff --git a/MAINTAINERS b/MAINTAINERS > > index 5cfbea4ce575..a38d7273705a 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -3874,7 +3874,7 @@ > > F: Documentation/devicetree/bindings/hwmon/cirrus,lochnagar.txt > > F: Documentation/devicetree/bindings/pinctrl/cirrus,lochnagar.txt > > F: Documentation/devicetree/bindings/regulator/cirrus,lochnagar.txt > > F: Documentation/devicetree/bindings/sound/cirrus,lochnagar.txt > > -F: Documentation/hwmon/lochnagar > > +F: Documentation/hwmon/lochnagar.rst > > > > CISCO FCOE HBA DRIVER > > M: Satish Kharat <satishkh(a)cisco.com> > > @@ -11272,7 +11272,7 @@ NXP FXAS21002C DRIVER > > M: Rui Miguel Silva <rmfrfs(a)gmail.com> > > L: linux-iio(a)vger.kernel.org > > S: Maintained > > -F: Documentation/devicetree/bindings/iio/gyroscope/fxas21002c.txt > > +F: Documentation/devicetree/bindings/iio/gyroscope/nxp,fxas21002c.txt > > F: drivers/iio/gyro/fxas21002c_core.c > > F: drivers/iio/gyro/fxas21002c.h > > F: drivers/iio/gyro/fxas21002c_i2c.c > > @@ -13043,7 +13043,7 @@ M: Niklas Cassel <niklas.cassel(a)linaro.org> > > L: netdev(a)vger.kernel.org > > S: Maintained > > F: drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c > > -F: Documentation/devicetree/bindings/net/qcom,dwmac.txt > > +F: Documentation/devicetree/bindings/net/qcom,ethqos.txt > > > > QUALCOMM GENERIC INTERFACE I2C DRIVER > > M: Alok Chauhan <alokc(a)codeaurora.org> > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > > index 8869742a85df..0f220264cc23 100644 > > --- a/arch/arm/Kconfig > > +++ b/arch/arm/Kconfig > > @@ -1263,7 +1263,7 @@ config SMP > > uniprocessor machines. On a uniprocessor machine, the kernel > > will run faster if you say N here. > > > > - See also <file:Documentation/x86/i386/IO-APIC.txt>, > > + See also <file:Documentation/x86/i386/IO-APIC.rst>, > > <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO > available at > > <http://tldp.org/HOWTO/SMP-HOWTO.html>. > > > > diff --git a/arch/arm64/kernel/kexec_image.c > > b/arch/arm64/kernel/kexec_image.c index 07bf740bea91..31cc2f423aa8 100644 > > --- a/arch/arm64/kernel/kexec_image.c > > +++ b/arch/arm64/kernel/kexec_image.c > > @@ -53,7 +53,7 @@ static void *image_load(struct kimage *image, > > > > /* > > * We require a kernel with an unambiguous Image header. Per > > - * Documentation/booting.txt, this is the case when image_size > > + * Documentation/arm64/booting.txt, this is the case when > image_size > > * is non-zero (practically speaking, since v3.17). > > */ > > h = (struct arm64_image_header *)kernel; > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > > index 8c1c636308c8..e868d2bd48b8 100644 > > --- a/arch/powerpc/Kconfig > > +++ b/arch/powerpc/Kconfig > > @@ -898,7 +898,7 @@ config PPC_MEM_KEYS > > page-based protections, but without requiring modification of > the > > page tables when an application changes protection domains. > > > > - For details, see Documentation/vm/protection-keys.rst > > + For details, see Documentation/x86/protection-keys.rst > > > > If unsure, say y. > > > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > > index 2bbbd4d1ba31..78fdf2dd71d1 100644 > > --- a/arch/x86/Kconfig > > +++ b/arch/x86/Kconfig > > @@ -395,7 +395,7 @@ config SMP > > Y to "Enhanced Real Time Clock Support", below. The "Advanced > Power > > Management" code will be disabled if you say Y here. > > > > - See also <file:Documentation/x86/i386/IO-APIC.txt>, > > + See also <file:Documentation/x86/i386/IO-APIC.rst>, > > <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO > available at > > <http://www.tldp.org/docs.html#howto>. > > > > @@ -1290,7 +1290,7 @@ config MICROCODE > > the Linux kernel. > > > > The preferred method to load microcode from a detached initrd is > > described - in Documentation/x86/microcode.txt. For that you > need to > > enable + in Documentation/x86/microcode.rst. For that you need to enable > > CONFIG_BLK_DEV_INITRD in order for the loader to be able to scan the initrd > > for microcode blobs. > > > > @@ -1329,7 +1329,7 @@ config MICROCODE_OLD_INTERFACE > > It is inadequate because it runs too late to be able to properly > > load microcode on a machine and it needs special tools. Instead, > you > > should've switched to the early loading method with the initrd > or > > - builtin microcode by now: Documentation/x86/microcode.txt > > + builtin microcode by now: Documentation/x86/microcode.rst > > > > config X86_MSR > > tristate "/dev/cpu/*/msr - Model-specific register support" > > @@ -1478,7 +1478,7 @@ config X86_5LEVEL > > A kernel with the option enabled can be booted on machines that > > support 4- or 5-level paging. > > > > - See Documentation/x86/x86_64/5level-paging.txt for more > > + See Documentation/x86/x86_64/5level-paging.rst for more > > information. > > > > Say N if unsure. > > @@ -1626,7 +1626,7 @@ config ARCH_MEMORY_PROBE > > depends on X86_64 && MEMORY_HOTPLUG > > help > > This option enables a sysfs memory/probe interface for testing. > > - See Documentation/memory-hotplug.txt for more information. > > + See Documentation/admin-guide/mm/memory-hotplug.rst for more > > information. If you are unsure how to answer this question, answer N. > > > > config ARCH_PROC_KCORE_TEXT > > @@ -1783,7 +1783,7 @@ config MTRR > > You can safely say Y even if your machine doesn't have MTRRs, > you'll > > just add about 9 KB to your kernel. > > > > - See <file:Documentation/x86/mtrr.txt> for more information. > > + See <file:Documentation/x86/mtrr.rst> for more information. > > > > config MTRR_SANITIZER > > def_bool y > > @@ -1895,7 +1895,7 @@ config X86_INTEL_MPX > > process and adds some branches to paths used during > > exec() and munmap(). > > > > - For details, see Documentation/x86/intel_mpx.txt > > + For details, see Documentation/x86/intel_mpx.rst > > > > If unsure, say N. > > > > @@ -1911,7 +1911,7 @@ config X86_INTEL_MEMORY_PROTECTION_KEYS > > page-based protections, but without requiring modification of > the > > page tables when an application changes protection domains. > > > > - For details, see Documentation/x86/protection-keys.txt > > + For details, see Documentation/x86/protection-keys.rst > > > > If unsure, say y. > > > > diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug > > index f730680dc818..59f598543203 100644 > > --- a/arch/x86/Kconfig.debug > > +++ b/arch/x86/Kconfig.debug > > @@ -156,7 +156,7 @@ config IOMMU_DEBUG > > code. When you use it make sure you have a big enough > > IOMMU/AGP aperture. Most of the options enabled by this can > > be set more finegrained using the iommu= command line > > - options. See Documentation/x86/x86_64/boot-options.txt for more > > + options. See Documentation/x86/x86_64/boot-options.rst for more > > details. > > > > config IOMMU_LEAK > > diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S > > index 850b8762e889..90d791ca1a95 100644 > > --- a/arch/x86/boot/header.S > > +++ b/arch/x86/boot/header.S > > @@ -313,7 +313,7 @@ start_sys_seg: .word SYSSEG > # obsolete and meaningless, > > but just > > > > type_of_loader: .byte 0 # 0 means ancient > bootloader, newer > > # bootloaders know > to change this. > > - # See > Documentation/x86/boot.txt for > > + # See > Documentation/x86/boot.rst for > > # assigned ids > > > > # flags, unused bits must be zero (RFU) bit within loadflags > > diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S > > index 11aa3b2afa4d..33f9fc38d014 100644 > > --- a/arch/x86/entry/entry_64.S > > +++ b/arch/x86/entry/entry_64.S > > @@ -8,7 +8,7 @@ > > * > > * entry.S contains the system-call and fault low-level handling routines. > > * > > - * Some of this is documented in Documentation/x86/entry_64.txt > > + * Some of this is documented in Documentation/x86/entry_64.rst > > * > > * A note on terminology: > > * - iret frame: Architecture defined interrupt frame from SS to RIP > > diff --git a/arch/x86/include/asm/bootparam_utils.h > > b/arch/x86/include/asm/bootparam_utils.h index f6f6ef436599..101eb944f13c > > 100644 > > --- a/arch/x86/include/asm/bootparam_utils.h > > +++ b/arch/x86/include/asm/bootparam_utils.h > > @@ -24,7 +24,7 @@ static void sanitize_boot_params(struct boot_params > > *boot_params) * IMPORTANT NOTE TO BOOTLOADER AUTHORS: do not simply clear > > * this field. The purpose of this field is to guarantee > > * compliance with the x86 boot spec located in > > - * Documentation/x86/boot.txt . That spec says that the > > + * Documentation/x86/boot.rst . That spec says that the > > * *whole* structure should be cleared, after which only the > > * portion defined by struct setup_header (boot_params->hdr) > > * should be copied in. > > diff --git a/arch/x86/include/asm/page_64_types.h > > b/arch/x86/include/asm/page_64_types.h index 793c14c372cb..288b065955b7 > > 100644 > > --- a/arch/x86/include/asm/page_64_types.h > > +++ b/arch/x86/include/asm/page_64_types.h > > @@ -48,7 +48,7 @@ > > > > #define __START_KERNEL_map _AC(0xffffffff80000000, UL) > > > > -/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. > > */ +/* See Documentation/x86/x86_64/mm.rst for a description of the memory > > map. */ > > > > #define __PHYSICAL_MASK_SHIFT 52 > > > > diff --git a/arch/x86/include/asm/pgtable_64_types.h > > b/arch/x86/include/asm/pgtable_64_types.h index 88bca456da99..52e5f5f2240d > > 100644 > > --- a/arch/x86/include/asm/pgtable_64_types.h > > +++ b/arch/x86/include/asm/pgtable_64_types.h > > @@ -103,7 +103,7 @@ extern unsigned int ptrs_per_p4d; > > #define PGDIR_MASK (~(PGDIR_SIZE - 1)) > > > > /* > > - * See Documentation/x86/x86_64/mm.txt for a description of the memory map. > > + * See Documentation/x86/x86_64/mm.rst for a description of the memory > > map. * > > * Be very careful vs. KASLR when changing anything here. The KASLR address > > * range must not overlap with anything except the KASAN shadow area, which > > diff --git a/arch/x86/kernel/cpu/microcode/amd.c > > b/arch/x86/kernel/cpu/microcode/amd.c index e1f3ba19ba54..06d4e67f31ab > > 100644 > > --- a/arch/x86/kernel/cpu/microcode/amd.c > > +++ b/arch/x86/kernel/cpu/microcode/amd.c > > @@ -61,7 +61,7 @@ static u8 amd_ucode_patch[PATCH_MAX_SIZE]; > > > > /* > > * Microcode patch container file is prepended to the initrd in cpio > > - * format. See Documentation/x86/microcode.txt > > + * format. See Documentation/x86/microcode.rst > > */ > > static const char > > ucode_path[] __maybe_unused = "kernel/x86/microcode/AuthenticAMD.bin"; > > diff --git a/arch/x86/kernel/kexec-bzimage64.c > > b/arch/x86/kernel/kexec-bzimage64.c index 22f60dd26460..b07e7069b09e 100644 > > --- a/arch/x86/kernel/kexec-bzimage64.c > > +++ b/arch/x86/kernel/kexec-bzimage64.c > > @@ -416,7 +416,7 @@ static void *bzImage64_load(struct kimage *image, char > > *kernel, efi_map_offset = params_cmdline_sz; > > efi_setup_data_offset = efi_map_offset + ALIGN(efi_map_sz, 16); > > > > - /* Copy setup header onto bootparams. Documentation/x86/boot.txt > */ > > + /* Copy setup header onto bootparams. Documentation/x86/boot.rst */ > > setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset; > > > > /* Is there a limit on setup header size? */ > > diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c > > index dcd272dbd0a9..f62b498b18fb 100644 > > --- a/arch/x86/kernel/pci-dma.c > > +++ b/arch/x86/kernel/pci-dma.c > > @@ -70,7 +70,7 @@ void __init pci_iommu_alloc(void) > > } > > > > /* > > - * See <Documentation/x86/x86_64/boot-options.txt> for the iommu kernel > > + * See <Documentation/x86/x86_64/boot-options.rst> for the iommu kernel > > * parameter documentation. > > */ > > static __init int iommu_setup(char *p) > > diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c > > index 7f61431c75fb..400c1ba033aa 100644 > > --- a/arch/x86/mm/tlb.c > > +++ b/arch/x86/mm/tlb.c > > @@ -711,7 +711,7 @@ void native_flush_tlb_others(const struct cpumask > > *cpumask, } > > > > /* > > - * See Documentation/x86/tlb.txt for details. We choose 33 > > + * See Documentation/x86/tlb.rst for details. We choose 33 > > * because it is large enough to cover the vast majority (at > > * least 95%) of allocations, and is small enough that we are > > * confident it will not cause too much overhead. Each single > > diff --git a/arch/x86/platform/pvh/enlighten.c > > b/arch/x86/platform/pvh/enlighten.c index 1861a2ba0f2b..c0a502f7e3a7 100644 > > --- a/arch/x86/platform/pvh/enlighten.c > > +++ b/arch/x86/platform/pvh/enlighten.c > > @@ -86,7 +86,7 @@ static void __init init_pvh_bootparams(bool xen_guest) > > } > > > > /* > > - * See Documentation/x86/boot.txt. > > + * See Documentation/x86/boot.rst. > > * > > * Version 2.12 supports Xen entry point but we will use default > x86/PC > > * environment (i.e. hardware_subarch 0). > > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig > > index 283ee94224c6..2438f37f2ca1 100644 > > --- a/drivers/acpi/Kconfig > > +++ b/drivers/acpi/Kconfig > > @@ -333,7 +333,7 @@ config ACPI_CUSTOM_DSDT_FILE > > depends on !STANDALONE > > help > > This option supports a custom DSDT by linking it into the > kernel. > > - See Documentation/acpi/dsdt-override.txt > > + See Documentation/admin-guide/acpi/dsdt-override.rst > > > > Enter the full path name to the file which includes the AmlCode > > or dsdt_aml_code declaration. > > @@ -355,7 +355,7 @@ config ACPI_TABLE_UPGRADE > > This option provides functionality to upgrade arbitrary ACPI > tables > > via initrd. No functional change if no ACPI tables are passed > via > > initrd, therefore it's safe to say Y. > > - See Documentation/acpi/initrd_table_override.txt for details > > + See Documentation/admin-guide/acpi/initrd_table_override.rst for > details > > > > config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD > > bool "Override ACPI tables from built-in initrd" > > @@ -365,7 +365,7 @@ config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD > > This option provides functionality to override arbitrary ACPI > tables > > from built-in uncompressed initrd. > > > > - See Documentation/acpi/initrd_table_override.txt for details > > + See Documentation/admin-guide/acpi/initrd_table_override.rst for > details > > > > config ACPI_DEBUG > > bool "Debug Statements" > > @@ -374,7 +374,7 @@ config ACPI_DEBUG > > output and increases the kernel size by around 50K. > > > > Use the acpi.debug_layer and acpi.debug_level kernel command- > line > > - parameters documented in Documentation/acpi/debug.txt and > > + parameters documented in Documentation/firmware-guide/acpi/ > debug.rst and > > Documentation/admin-guide/kernel-parameters.rst to control the type and > > amount of debug output. > > > > @@ -445,7 +445,7 @@ config ACPI_CUSTOM_METHOD > > help > > This debug facility allows ACPI AML methods to be inserted and/ > or > > replaced without rebooting the system. For details refer to: > > - Documentation/acpi/method-customizing.txt. > > + Documentation/firmware-guide/acpi/method-customizing.rst. > > > > NOTE: This option is security sensitive, because it allows > arbitrary > > kernel memory to be written to by root (uid=0) users, allowing > them > > diff --git a/drivers/net/ethernet/faraday/ftgmac100.c > > b/drivers/net/ethernet/faraday/ftgmac100.c index b17b79e612a3..ac6280ad43a1 > > 100644 > > --- a/drivers/net/ethernet/faraday/ftgmac100.c > > +++ b/drivers/net/ethernet/faraday/ftgmac100.c > > @@ -1075,7 +1075,7 @@ static int ftgmac100_mii_probe(struct ftgmac100 *priv, > > phy_interface_t intf) } > > > > /* Indicate that we support PAUSE frames (see comment in > > - * Documentation/networking/phy.txt) > > + * Documentation/networking/phy.rst) > > */ > > phy_support_asym_pause(phydev); > > > > diff --git a/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt > > b/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt index > > 56af3f650fa3..89fb8e14676f 100644 > > --- a/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt > > +++ b/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt > > @@ -54,8 +54,8 @@ a limited few common behaviours and properties. This > > allows us to define a simple interface consisting of a character device and > > a set of sysfs files: > > > > See: > > -Documentation/ABI/testing/sysfs-class-fieldbus-dev > > -Documentation/ABI/testing/fieldbus-dev-cdev > > +drivers/staging/fieldbus/Documentation/ABI/sysfs-class-fieldbus-dev > > +drivers/staging/fieldbus/Documentation/ABI/fieldbus-dev-cdev > > > > Note that this simple interface does not provide a way to modify adapter > > configuration settings. It is therefore useful only for adapters that get > > their diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > > index 1e3ed41ae1f3..69938dbae2d0 100644 > > --- a/drivers/vhost/vhost.c > > +++ b/drivers/vhost/vhost.c > > @@ -1694,7 +1694,7 @@ EXPORT_SYMBOL_GPL(vhost_dev_ioctl); > > > > /* TODO: This is really inefficient. We need something like get_user() > > * (instruction directly accesses the data, with an exception table entry > > - * returning -EFAULT). See Documentation/x86/exception-tables.txt. > > + * returning -EFAULT). See Documentation/x86/exception-tables.rst. > > */ > > static int set_bit_to_user(int nr, void __user *addr) > > { > > diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h > > index de1804aeaf69..98e3db7a89cd 100644 > > --- a/include/acpi/acpi_drivers.h > > +++ b/include/acpi/acpi_drivers.h > > @@ -25,7 +25,7 @@ > > #define ACPI_MAX_STRING 80 > > > > /* > > - * Please update drivers/acpi/debug.c and Documentation/acpi/debug.txt > > + * Please update drivers/acpi/debug.c and > > Documentation/firmware-guide/acpi/debug.rst * if you add to this list. > > */ > > #define ACPI_BUS_COMPONENT 0x00010000 > > diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h > > index 1f966670c8dc..623eb58560b9 100644 > > --- a/include/linux/fs_context.h > > +++ b/include/linux/fs_context.h > > @@ -85,7 +85,7 @@ struct fs_parameter { > > * Superblock creation fills in ->root whereas reconfiguration begins with > > this * already set. > > * > > - * See Documentation/filesystems/mounting.txt > > + * See Documentation/filesystems/mount_api.txt > > */ > > struct fs_context { > > const struct fs_context_operations *ops; > > diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h > > index 47f58cfb6a19..df1318d85f7d 100644 > > --- a/include/linux/lsm_hooks.h > > +++ b/include/linux/lsm_hooks.h > > @@ -77,7 +77,7 @@ > > * state. This is called immediately after commit_creds(). > > * > > * Security hooks for mount using fs_context. > > - * [See also Documentation/filesystems/mounting.txt] > > + * [See also Documentation/filesystems/mount_api.txt] > > * > > * @fs_context_dup: > > * Allocate and attach a security structure to sc->security. This > pointer > > diff --git a/mm/Kconfig b/mm/Kconfig > > index ee8d1f311858..6e5fb81bde4b 100644 > > --- a/mm/Kconfig > > +++ b/mm/Kconfig > > @@ -165,7 +165,7 @@ config MEMORY_HOTPLUG_DEFAULT_ONLINE > > onlining policy (/sys/devices/system/memory/auto_online_blocks) > which > > determines what happens to newly added memory regions. Policy > setting > > can always be changed at runtime. > > - See Documentation/memory-hotplug.txt for more information. > > + See Documentation/admin-guide/mm/memory-hotplug.rst for more > > information. > > > > Say Y here if you want all hot-plugged memory blocks to appear > in > > 'online' state by default. > > diff --git a/security/Kconfig b/security/Kconfig > > index aeac3676dd4d..6d75ed71970c 100644 > > --- a/security/Kconfig > > +++ b/security/Kconfig > > @@ -62,7 +62,7 @@ config PAGE_TABLE_ISOLATION > > ensuring that the majority of kernel addresses are not mapped > > into userspace. > > > > - See Documentation/x86/pti.txt for more details. > > + See Documentation/x86/pti.rst for more details. > > > > config SECURITY_INFINIBAND > > bool "Infiniband Security Hooks" > > diff --git a/tools/include/linux/err.h b/tools/include/linux/err.h > > index 2f5a12b88a86..25f2bb3a991d 100644 > > --- a/tools/include/linux/err.h > > +++ b/tools/include/linux/err.h > > @@ -20,7 +20,7 @@ > > * Userspace note: > > * The same principle works for userspace, because 'error' pointers > > * fall down to the unused hole far from user space, as described > > - * in Documentation/x86/x86_64/mm.txt for x86_64 arch: > > + * in Documentation/x86/x86_64/mm.rst for x86_64 arch: > > * > > * 0000000000000000 - 00007fffffffffff (=47 bits) user space, different per > > mm hole caused by [48:63] sign extension * ffffffffffe00000 - > > ffffffffffffffff (=2 MB) unused hole > > diff --git a/tools/objtool/Documentation/stack-validation.txt > > b/tools/objtool/Documentation/stack-validation.txt index > > 4dd11a554b9b..de094670050b 100644 > > --- a/tools/objtool/Documentation/stack-validation.txt > > +++ b/tools/objtool/Documentation/stack-validation.txt > > @@ -21,7 +21,7 @@ instructions). Similarly, it knows how to follow switch > > statements, for which gcc sometimes uses jump tables. > > > > (Objtool also has an 'orc generate' subcommand which generates debuginfo > > -for the ORC unwinder. See Documentation/x86/orc-unwinder.txt in the > > +for the ORC unwinder. See Documentation/x86/orc-unwinder.rst in the > > kernel tree for more details.) > > > > > > @@ -101,7 +101,7 @@ b) ORC (Oops Rewind Capability) unwind table generation > > band. So it doesn't affect runtime performance and it can be > > reliable even when interrupts or exceptions are involved. > > > > - For more details, see Documentation/x86/orc-unwinder.txt. > > + For more details, see Documentation/x86/orc-unwinder.rst. > > > > c) Higher live patching compatibility rate > > > > diff --git a/tools/testing/selftests/x86/protection_keys.c > > b/tools/testing/selftests/x86/protection_keys.c index > > 5d546dcdbc80..798a5ddeee55 100644 > > --- a/tools/testing/selftests/x86/protection_keys.c > > +++ b/tools/testing/selftests/x86/protection_keys.c > > @@ -1,6 +1,6 @@ > > // SPDX-License-Identifier: GPL-2.0 > > /* > > - * Tests x86 Memory Protection Keys (see > > Documentation/x86/protection-keys.txt) + * Tests x86 Memory Protection Keys > > (see Documentation/x86/protection-keys.rst) * > > * There are examples in here of: > > * * how to set protection keys on memory > > >

6 years, 6 months

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[PATCH net-next v3 0/1] Allow TX timestamp with UDP GSO

by Fred Klassen

Fixes an issue where TX Timestamps are not arriving on the error queue when UDP_SEGMENT CMSG type is combined with CMSG type SO_TIMESTAMPING. Fred Klassen (1): net/udp_gso: Allow TX timestamp with UDP GSO net/ipv4/udp_offload.c | 5 +++++ 1 file changed, 5 insertions(+) -- 2.11.0

6 years, 6 months

2
4
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[PATCH v5 0/3] Fix vDSO clock_getres()

by Vincenzo Frascino

clock_getres in the vDSO library has to preserve the same behaviour of posix_get_hrtimer_res(). In particular, posix_get_hrtimer_res() does: sec = 0; ns = hrtimer_resolution; and hrtimer_resolution depends on the enablement of the high resolution timers that can happen either at compile or at run time. A possible fix is to change the vdso implementation of clock_getres, keeping a copy of hrtimer_resolution in vdso data and using that directly [1]. This patchset implements the proposed fix for arm64, powerpc, s390, nds32 and adds a test to verify that the syscall and the vdso library implementation of clock_getres return the same values. Even if these patches are unified by the same topic, there is no dependency between them, hence they can be merged singularly by each arch maintainer. Note: arm64 and nds32 respective fixes have been merged in 5.2-rc1, hence they have been removed from this series. [1] https://marc.info/?l=linux-arm-kernel&m=155110381930196&w=2 Changes: -------- v5: - Rebased on 5.2-rc2 - Fixed a bug in kselftest. v4: - Address review comments. v3: - Rebased on 5.2-rc1. - Address review comments. v2: - Rebased on 5.1-rc5. - Addressed review comments. Cc: Christophe Leroy <christophe.leroy(a)c-s.fr> Cc: Benjamin Herrenschmidt <benh(a)kernel.crashing.org> Cc: Paul Mackerras <paulus(a)samba.org> Cc: Michael Ellerman <mpe(a)ellerman.id.au> Cc: Martin Schwidefsky <schwidefsky(a)de.ibm.com> Cc: Heiko Carstens <heiko.carstens(a)de.ibm.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Vincenzo Frascino (3): powerpc: Fix vDSO clock_getres() s390: Fix vDSO clock_getres() kselftest: Extend vDSO selftest to clock_getres arch/powerpc/include/asm/vdso_datapage.h | 2 + arch/powerpc/kernel/asm-offsets.c | 2 +- arch/powerpc/kernel/time.c | 1 + arch/powerpc/kernel/vdso32/gettimeofday.S | 7 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 7 +- arch/s390/include/asm/vdso.h | 1 + arch/s390/kernel/asm-offsets.c | 2 +- arch/s390/kernel/time.c | 1 + arch/s390/kernel/vdso32/clock_getres.S | 12 +- arch/s390/kernel/vdso64/clock_getres.S | 10 +- tools/testing/selftests/vDSO/Makefile | 2 + .../selftests/vDSO/vdso_clock_getres.c | 124 ++++++++++++++++++ 12 files changed, 155 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/vDSO/vdso_clock_getres.c -- 2.21.0

6 years, 6 months

2
5
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[PATCH 00/22] Some documentation fixes

by Mauro Carvalho Chehab

Fix several warnings and broken links. This series was generated against linux-next, but was rebased to be applied at docs-next. It should apply cleanly on either tree. There's a git tree with all of them applied on the top of docs/docs-next at: https://git.linuxtv.org/mchehab/experimental.git/log/?h=fix_doc_links_v2 Mauro Carvalho Chehab (21): ABI: sysfs-devices-system-cpu: point to the right docs isdn: mISDN: remove a bogus reference to a non-existing doc dt: fix broken references to nand.txt docs: zh_CN: get rid of basic_profiling.txt doc: it_IT: fix reference to magic-number.rst docs: mm: numaperf.rst: get rid of a build warning docs: bpf: get rid of two warnings docs: mark orphan documents as such docs: amd-memory-encryption.rst get rid of warnings gpu: amdgpu: fix broken amdgpu_dma_buf.c references gpu: i915.rst: Fix references to renamed files docs: zh_CN: avoid duplicate citation references docs: vm: hmm.rst: fix some warnings docs: it: license-rules.rst: get rid of warnings docs: gpio: driver.rst: fix a bad tag docs: soundwire: locking: fix tags for a code-block docs: security: trusted-encrypted.rst: fix code-block tag docs: security: core.rst: Fix several warnings docs: net: dpio-driver.rst: fix two codeblock warnings docs: net: sja1105.rst: fix table format docs: fix broken documentation links Otto Sabart (1): mfd: madera: Fix bad reference to pinctrl.txt file .../ABI/testing/sysfs-devices-system-cpu | 3 +- Documentation/accelerators/ocxl.rst | 2 + Documentation/acpi/dsd/leds.txt | 2 +- .../admin-guide/kernel-parameters.rst | 6 +- .../admin-guide/kernel-parameters.txt | 16 ++--- Documentation/admin-guide/mm/numaperf.rst | 5 +- Documentation/admin-guide/ras.rst | 2 +- Documentation/arm/stm32/overview.rst | 2 + .../arm/stm32/stm32f429-overview.rst | 2 + .../arm/stm32/stm32f746-overview.rst | 2 + .../arm/stm32/stm32f769-overview.rst | 2 + .../arm/stm32/stm32h743-overview.rst | 2 + .../arm/stm32/stm32mp157-overview.rst | 2 + Documentation/bpf/btf.rst | 2 + .../bindings/mtd/amlogic,meson-nand.txt | 2 +- .../devicetree/bindings/mtd/gpmc-nand.txt | 2 +- .../devicetree/bindings/mtd/marvell-nand.txt | 2 +- .../devicetree/bindings/mtd/tango-nand.txt | 2 +- .../devicetree/bindings/net/fsl-enetc.txt | 7 +- .../bindings/pci/amlogic,meson-pcie.txt | 2 +- .../regulator/qcom,rpmh-regulator.txt | 2 +- .../devicetree/booting-without-of.txt | 2 +- Documentation/driver-api/gpio/board.rst | 2 +- Documentation/driver-api/gpio/consumer.rst | 2 +- Documentation/driver-api/gpio/driver.rst | 2 +- .../driver-api/soundwire/locking.rst | 4 +- .../firmware-guide/acpi/enumeration.rst | 2 +- .../firmware-guide/acpi/method-tracing.rst | 2 +- Documentation/gpu/amdgpu.rst | 4 +- Documentation/gpu/i915.rst | 6 +- Documentation/gpu/msm-crash-dump.rst | 2 + Documentation/i2c/instantiating-devices | 2 +- Documentation/interconnect/interconnect.rst | 2 + Documentation/laptops/lg-laptop.rst | 2 + .../freescale/dpaa2/dpio-driver.rst | 4 +- Documentation/networking/dsa/sja1105.rst | 6 +- Documentation/powerpc/isa-versions.rst | 2 + Documentation/security/keys/core.rst | 16 +++-- .../security/keys/trusted-encrypted.rst | 4 +- Documentation/sysctl/kernel.txt | 4 +- .../translations/it_IT/process/howto.rst | 2 +- .../it_IT/process/license-rules.rst | 28 ++++---- .../it_IT/process/magic-number.rst | 2 +- .../it_IT/process/stable-kernel-rules.rst | 4 +- .../translations/zh_CN/basic_profiling.txt | 71 ------------------- .../translations/zh_CN/process/4.Coding.rst | 2 +- .../zh_CN/process/management-style.rst | 4 +- .../zh_CN/process/programming-language.rst | 28 ++++---- .../virtual/kvm/amd-memory-encryption.rst | 5 ++ Documentation/virtual/kvm/vcpu-requests.rst | 2 + Documentation/vm/hmm.rst | 9 ++- Documentation/x86/x86_64/5level-paging.rst | 2 +- Documentation/x86/x86_64/boot-options.rst | 4 +- .../x86/x86_64/fake-numa-for-cpusets.rst | 2 +- MAINTAINERS | 6 +- arch/arm/Kconfig | 2 +- arch/arm64/kernel/kexec_image.c | 2 +- arch/powerpc/Kconfig | 2 +- arch/x86/Kconfig | 16 ++--- arch/x86/Kconfig.debug | 2 +- arch/x86/boot/header.S | 2 +- arch/x86/entry/entry_64.S | 2 +- arch/x86/include/asm/bootparam_utils.h | 2 +- arch/x86/include/asm/page_64_types.h | 2 +- arch/x86/include/asm/pgtable_64_types.h | 2 +- arch/x86/kernel/cpu/microcode/amd.c | 2 +- arch/x86/kernel/kexec-bzimage64.c | 2 +- arch/x86/kernel/pci-dma.c | 2 +- arch/x86/mm/tlb.c | 2 +- arch/x86/platform/pvh/enlighten.c | 2 +- drivers/acpi/Kconfig | 10 +-- drivers/isdn/mISDN/dsp_core.c | 2 - drivers/net/ethernet/faraday/ftgmac100.c | 2 +- .../fieldbus/Documentation/fieldbus_dev.txt | 4 +- drivers/vhost/vhost.c | 2 +- include/acpi/acpi_drivers.h | 2 +- include/linux/fs_context.h | 2 +- include/linux/lsm_hooks.h | 2 +- include/linux/mfd/madera/pdata.h | 3 +- mm/Kconfig | 2 +- security/Kconfig | 2 +- tools/include/linux/err.h | 2 +- .../Documentation/stack-validation.txt | 4 +- tools/testing/selftests/x86/protection_keys.c | 2 +- 84 files changed, 183 insertions(+), 212 deletions(-) delete mode 100644 Documentation/translations/zh_CN/basic_profiling.txt -- 2.21.0

6 years, 6 months

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[GIT PULL] Kselftest fixes update for Linux 5.2-rc3

by Shuah Khan

Hi Linus, Please pull the following Kselftest fixes update for Linux 5.2-rc3. This Kselftest update for Linux 5.2-rc3 consists of - Alexandre Belloni's fixes to rtc regressions introduced in kselftest Makefile test run output refactoring work from Kees Cook. - ftrace test checkbashisms fixes from Masami Hiramatsu As a note, it is an usual and expected outcome to see a few regressions when Kselftest run-time scripts are enhanced. No surprises there. I am glad we are finding these problems early on in the rc cycle. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit a188339ca5a396acc588e5851ed7e19f66b0ebd9: Linux 5.2-rc1 (2019-05-19 15:47:09 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-5.2-rc3 for you to fetch changes up to eff82a263b5cfa3427fd9dbfedd96da94fdc9f19: selftests: rtc: rtctest: specify timeouts (2019-05-24 13:39:58 -0600) ---------------------------------------------------------------- linux-kselftest-5.2-rc3 This Kselftest update for Linux 5.2-rc3 consists of - Alexandre Belloni's fixes to rtc regressions introduced in kselftest Makefile test run output refactoring work from Kees Cook. - ftrace test checkbashisms fixes from Masami Hiramatsu ---------------------------------------------------------------- Alexandre Belloni (2): selftests/harness: Allow test to configure timeout selftests: rtc: rtctest: specify timeouts Masami Hiramatsu (2): selftests/ftrace: Make a script checkbashisms clean selftests/ftrace: Add checkbashisms meta-testcase tools/testing/selftests/ftrace/ftracetest | 1 + .../selftests/ftrace/test.d/kprobe/kprobe_ftrace.tc | 2 +- .../selftests/ftrace/test.d/selftest/bashisms.tc | 21 +++++++++++++++++++++ tools/testing/selftests/kselftest_harness.h | 17 ++++++++++++----- tools/testing/selftests/rtc/rtctest.c | 6 +++--- 5 files changed, 38 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc ----------------------------------------------------------------

6 years, 6 months

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[PATCH RFC v8 00/10] namei: resolveat(2) path resolution restrictions

by Aleksa Sarai

Patch changelog: v8: * Default to O_CLOEXEC to match other new fd-creation syscalls (users can always disable O_CLOEXEC afterwards). [Christian] * Implement magic-link restrictions based on their mode. This is done through a series of masks and is designed to avoid breaking users -- most users don't have chained O_PATH fd re-opens. * Add O_EMPTYPATH which allows for fd re-opening without needing procfs. This would help some users of fd re-opening, and with the changes to magic-link permissions we now have the right semantics for such a flag. * Add selftests for resolveat(2), O_EMPTYPATH, and the magic-link mode semantics. v7: * Remove execveat(2) support for these flags since it might result in some pretty hairy security issues with setuid binaries. There are other avenues we can go down to solve the issues with CVE-2019-5736. [Jann] * Reserve an additional bit in resolveat(2) for the eXecute access mode if we end up implementing it. v6: * Drop O_* flags API to the new LOOKUP_ path scoping bits and instead introduce resolveat(2) as an alternative method of obtaining an O_PATH. The justification for this is included in patch 6 (though switching back to O_* flags is trivial). v5: * In response to CVE-2019-5736 (one of the vectors showed that open(2)+fexec(3) cannot be used to scope binfmt_script's implicit open_exec()), AT_* flags have been re-added and are now piped through to binfmt_script (and other binfmt_* that use open_exec) but are only supported for execveat(2) for now. v4: * Remove AT_* flag reservations, as they require more discussion. * Switch to path_is_under() over __d_path() for breakout checking. * Make O_XDEV no longer block openat("/tmp", "/", O_XDEV) -- dirfd is now ignored for absolute paths to match other flags. * Improve the dirfd_path_init() refactor and move it to a separate commit. * Remove reference to Linux-capsicum. * Switch "proclink" name to magic-link. v3: [resend] v2: * Made ".." resolution with AT_THIS_ROOT and AT_BENEATH safe(r) with some semi-aggressive __d_path checking (see patch 3). * Disallowed "proclinks" with AT_THIS_ROOT and AT_BENEATH, in the hopes they can be re-enabled once safe. * Removed the selftests as they will be reimplemented as xfstests. * Removed stat(2) support, since you can already get it through O_PATH and fstatat(2). The need for some sort of control over VFS's path resolution (to avoid malicious paths resulting in inadvertent breakouts) has been a very long-standing desire of many userspace applications. This patchset is a revival of Al Viro's old AT_NO_JUMPS[1,2] patchset (which was a variant of David Drysdale's O_BENEATH patchset[3] which was a spin-off of the Capsicum project[4]) with a few additions and changes made based on the previous discussion within [5] as well as others I felt were useful. In line with the conclusions of the original discussion of AT_NO_JUMPS, the flag has been split up into separate flags. However, instead of being an openat(2) flag it is provided through a new syscall resolveat(2) which provides an alternative way to get an O_PATH file descriptor (the reasoning for doing this is included in patch 6). The following new LOOKUP_ flags are added: * LOOKUP_XDEV blocks all mountpoint crossings (upwards, downwards, or through absolute links). Absolute pathnames alone in openat(2) do not trigger this. * LOOKUP_NO_MAGICLINKS blocks resolution through /proc/$pid/fd-style links. This is done by blocking the usage of nd_jump_link() during resolution in a filesystem. The term "magic-links" is used to match with the only reference to these links in Documentation/, but I'm happy to change the name. It should be noted that this is different to the scope of ~LOOKUP_FOLLOW in that it applies to all path components. However, you can do resolveat(NO_FOLLOW|NO_MAGICLINKS) on a magic-link and it will *not* fail (assuming that no parent component was a magic-link), and you will have an fd for the magic-link. * LOOKUP_BENEATH disallows escapes to outside the starting dirfd's tree, using techniques such as ".." or absolute links. Absolute paths in openat(2) are also disallowed. Conceptually this flag is to ensure you "stay below" a certain point in the filesystem tree -- but this requires some additional to protect against various races that would allow escape using ".." (see patch 4 for more detail). Currently LOOKUP_BENEATH implies LOOKUP_NO_MAGICLINKS, because it can trivially beam you around the filesystem (breaking the protection). In future, there might be similar safety checks as in patch 4, but that requires more discussion. In addition, two new flags are added that expand on the above ideas: * LOOKUP_NO_SYMLINKS does what it says on the tin. No symlink resolution is allowed at all, including magic-links. Just as with LOOKUP_NO_MAGICLINKS this can still be used with NOFOLLOW to open an fd for the symlink as long as no parent path had a symlink component. * LOOKUP_IN_ROOT is an extension of LOOKUP_BENEATH that, rather than blocking attempts to move past the root, forces all such movements to be scoped to the starting point. This provides chroot(2)-like protection but without the cost of a chroot(2) for each filesystem operation, as well as being safe against race attacks that chroot(2) is not. If a race is detected (as with LOOKUP_BENEATH) then an error is generated, and similar to LOOKUP_BENEATH it is not permitted to cross magic-links with LOOKUP_IN_ROOT. The primary need for this is from container runtimes, which currently need to do symlink scoping in userspace[6] when opening paths in a potentially malicious container. There is a long list of CVEs that could have bene mitigated by having O_THISROOT (such as CVE-2017-1002101, CVE-2017-1002102, CVE-2018-15664, and CVE-2019-5736, just to name a few). And further, several semantics of file descriptor "re-opening" are now changed to prevent attacks like CVE-2019-5736 by restricting how magic-links can be resolved (based on their mode). This required some other changes to the semantics of the modes of O_PATH file descriptor's associated /proc/self/fd magic-links. resolveat(2) has the ability to further restrict re-opening of its own O_PATH fds, so that users can make even better use of this feature. Finally, O_EMPTYPATH was added so that users can do /proc/self/fd-style re-opening without depending on procfs. The new restricted semantics for magic-links are applied here too. Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: Eric Biederman <ebiederm(a)xmission.com> Cc: Andy Lutomirski <luto(a)kernel.org> Cc: David Howells <dhowells(a)redhat.com> Cc: Jann Horn <jannh(a)google.com> Cc: Christian Brauner <christian(a)brauner.io> Cc: David Drysdale <drysdale(a)google.com> Cc: Tycho Andersen <tycho(a)tycho.ws> Cc: Kees Cook <keescook(a)chromium.org> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: <containers(a)lists.linux-foundation.org> Cc: <linux-fsdevel(a)vger.kernel.org> Cc: <linux-api(a)vger.kernel.org> [1]: https://lwn.net/Articles/721443/ [2]: https://lore.kernel.org/patchwork/patch/784221/ [3]: https://lwn.net/Articles/619151/ [4]: https://lwn.net/Articles/603929/ [5]: https://lwn.net/Articles/723057/ [6]: https://github.com/cyphar/filepath-securejoin Aleksa Sarai (10): namei: obey trailing magic-link DAC permissions procfs: switch magic-link modes to be more sane open: O_EMPTYPATH: procfs-less file descriptor re-opening namei: split out nd->dfd handling to dirfd_path_init namei: O_BENEATH-style path resolution flags namei: LOOKUP_IN_ROOT: chroot-like path resolution namei: aggressively check for nd->root escape on ".." resolution namei: resolveat(2) syscall kselftest: save-and-restore errno to allow for %m formatting selftests: add resolveat(2) selftests arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd.h | 2 +- arch/arm64/include/asm/unistd32.h | 3 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/fcntl.c | 2 +- fs/internal.h | 1 + fs/namei.c | 397 ++++++++++++++--- fs/open.c | 10 +- fs/proc/base.c | 20 +- fs/proc/fd.c | 16 +- fs/proc/namespaces.c | 2 +- include/linux/fcntl.h | 10 +- include/linux/fs.h | 4 + include/linux/namei.h | 8 + include/linux/types.h | 2 +- include/uapi/asm-generic/fcntl.h | 5 + include/uapi/asm-generic/unistd.h | 5 +- include/uapi/linux/fcntl.h | 10 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/kselftest.h | 15 + tools/testing/selftests/resolveat/.gitignore | 1 + tools/testing/selftests/resolveat/Makefile | 6 + tools/testing/selftests/resolveat/helpers.h | 195 +++++++++ .../selftests/resolveat/linkmode_test.c | 306 ++++++++++++++ .../selftests/resolveat/resolveat_test.c | 400 ++++++++++++++++++ 39 files changed, 1350 insertions(+), 87 deletions(-) create mode 100644 tools/testing/selftests/resolveat/.gitignore create mode 100644 tools/testing/selftests/resolveat/Makefile create mode 100644 tools/testing/selftests/resolveat/helpers.h create mode 100644 tools/testing/selftests/resolveat/linkmode_test.c create mode 100644 tools/testing/selftests/resolveat/resolveat_test.c -- 2.21.0

6 years, 6 months

3
14
0 0

[PATCH bpf v2] selftests: bpf: fix compiler warning

by Alakesh Haloi

Add missing header file following compiler warning prog_tests/flow_dissector.c: In function ‘tx_tap’: prog_tests/flow_dissector.c:175:9: warning: implicit declaration of function ‘writev’; did you mean ‘write’? [-Wimplicit-function-declaration] return writev(fd, iov, ARRAY_SIZE(iov)); ^~~~~~ write Fixes: 0905beec9f52 ("selftests/bpf: run flow dissector tests in skb-less mode") Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> --- tools/testing/selftests/bpf/prog_tests/flow_dissector.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c index fbd1d88a6095..c938283ac232 100644 --- a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c +++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c @@ -3,6 +3,7 @@ #include <error.h> #include <linux/if.h> #include <linux/if_tun.h> +#include <sys/uio.h> #define CHECK_FLOW_KEYS(desc, got, expected) \ CHECK_ATTR(memcmp(&got, &expected, sizeof(got)) != 0, \ -- 2.17.1

6 years, 6 months

3
2
0 0

[PATCH] selftests: bpf: fix compiler warning

by Alakesh Haloi

Add missing header file following compiler warning prog_tests/flow_dissector.c: In function ‘tx_tap’: prog_tests/flow_dissector.c:175:9: warning: implicit declaration of function ‘writev’; did you mean ‘write’? [-Wimplicit-function-declaration] return writev(fd, iov, ARRAY_SIZE(iov)); ^~~~~~ write Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> --- tools/testing/selftests/bpf/prog_tests/flow_dissector.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c index fbd1d88a6095..c938283ac232 100644 --- a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c +++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c @@ -3,6 +3,7 @@ #include <error.h> #include <linux/if.h> #include <linux/if_tun.h> +#include <sys/uio.h> #define CHECK_FLOW_KEYS(desc, got, expected) \ CHECK_ATTR(memcmp(&got, &expected, sizeof(got)) != 0, \ -- 2.17.1

6 years, 6 months

2
2
0 0

[PATCH] selftests: vm: install test_vmalloc.sh for run_vmtests

by Naresh Kamboju

Add test_vmalloc.sh to TEST_FILES to make sure it gets installed for run_vmtests. Fixed below error: ./run_vmtests: line 217: ./test_vmalloc.sh: No such file or directory Tested with: make TARGETS=vm install INSTALL_PATH=$PWD/x Signed-off-by: Naresh Kamboju <naresh.kamboju(a)linaro.org> --- tools/testing/selftests/vm/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index e13eb6cc8901..05306c58ff9f 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -25,6 +25,8 @@ TEST_GEN_FILES += virtual_address_range TEST_PROGS := run_vmtests +TEST_FILES := test_vmalloc.sh + KSFT_KHDR_INSTALL := 1 include ../lib.mk -- 2.17.1

6 years, 6 months

2
1
0 0

[PATCH net 0/4] Allow TX timestamp with UDP GSO

by Fred Klassen

Fixes an issue where TX Timestamps are not arriving on the error queue when UDP_SEGMENT CMSG type is combined with CMSG type SO_TIMESTAMPING. Also this updates the UDP GSO selftests to optionally stress test this condition, and report the reliability and performance of both TX Timestamping and ZEROCOPY messages. Fred Klassen (4): net/udp_gso: Allow TX timestamp with UDP GSO net/udpgso_bench_tx: options to exercise TX CMSG net/udpgso_bench_tx: fix sendmmsg on unconnected socket net/udpgso_bench_tx: audit error queue net/ipv4/udp_offload.c | 4 + tools/testing/selftests/net/udpgso_bench_tx.c | 376 ++++++++++++++++++++++++-- 2 files changed, 358 insertions(+), 22 deletions(-) -- 2.11.0

6 years, 6 months

2
33
0 0

[PATCH v2 0/2] close_range()

by Christian Brauner

Hey, This is v2 of this patchset. In accordance with some comments There's a cond_resched() added to the close loop similar to what is done for close_files(). A common helper pick_file() for __close_fd() and __close_range() has been split out. This allows to only make a cond_resched() call when filp_close() has been called similar to what is done in close_files(). Maybe that's not worth it. Jann mentioned that cond_resched() looks rather cheap. So it maybe that we could simply do: while (fd <= max_fd) { __close(files, fd++); cond_resched(); } I also added a missing test for close_range(fd, fd, 0). Thanks! Christian Christian Brauner (2): open: add close_range() tests: add close_range() tests arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/file.c | 62 +++++++- fs/open.c | 20 +++ include/linux/fdtable.h | 2 + include/linux/syscalls.h | 2 + include/uapi/asm-generic/unistd.h | 4 +- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/core/.gitignore | 1 + tools/testing/selftests/core/Makefile | 6 + .../testing/selftests/core/close_range_test.c | 142 ++++++++++++++++++ 26 files changed, 249 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/core/.gitignore create mode 100644 tools/testing/selftests/core/Makefile create mode 100644 tools/testing/selftests/core/close_range_test.c -- 2.21.0

6 years, 6 months

4
7
0 0

[PATCH] userfaultfd: selftest: fix compiler warning

by Alakesh Haloi

Fixes following compiler warning userfaultfd.c: In function ‘usage’: userfaultfd.c:126:2: warning: format not a string literal and no format arguments [-Wformat-security] fprintf(stderr, examples); Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> --- tools/testing/selftests/vm/userfaultfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 5d1db824f73a..b3e6497b080c 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -123,7 +123,7 @@ static void usage(void) fprintf(stderr, "Supported <test type>: anon, hugetlb, " "hugetlb_shared, shmem\n\n"); fprintf(stderr, "Examples:\n\n"); - fprintf(stderr, examples); + fprintf(stderr, "%s", examples); exit(1); } -- 2.17.1

6 years, 6 months

3
2
0 0

[PATCH v3 3/3] tests: add close_range() tests

by Christian Brauner

This adds basic tests for the new close_range() syscall. - test that no invalid flags can be passed - test that a range of file descriptors is correctly closed - test that a range of file descriptors is correctly closed if there there are already closed file descriptors in the range - test that max_fd is correctly capped to the current fdtable maximum Signed-off-by: Christian Brauner <christian(a)brauner.io> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Dmitry V. Levin <ldv(a)altlinux.org> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Florian Weimer <fweimer(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: linux-api(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org --- v1: unchanged v2: - Christian Brauner <christian(a)brauner.io>: - verify that close_range() correctly closes a single file descriptor v3: - Christian Brauner <christian(a)brauner.io>: - add missing Cc for Shuah - add missing Cc for linux-kselftest --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/core/.gitignore | 1 + tools/testing/selftests/core/Makefile | 6 + .../testing/selftests/core/close_range_test.c | 142 ++++++++++++++++++ 4 files changed, 150 insertions(+) create mode 100644 tools/testing/selftests/core/.gitignore create mode 100644 tools/testing/selftests/core/Makefile create mode 100644 tools/testing/selftests/core/close_range_test.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 9781ca79794a..06e57fabbff9 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -4,6 +4,7 @@ TARGETS += bpf TARGETS += breakpoints TARGETS += capabilities TARGETS += cgroup +TARGETS += core TARGETS += cpufreq TARGETS += cpu-hotplug TARGETS += drivers/dma-buf diff --git a/tools/testing/selftests/core/.gitignore b/tools/testing/selftests/core/.gitignore new file mode 100644 index 000000000000..6e6712ce5817 --- /dev/null +++ b/tools/testing/selftests/core/.gitignore @@ -0,0 +1 @@ +close_range_test diff --git a/tools/testing/selftests/core/Makefile b/tools/testing/selftests/core/Makefile new file mode 100644 index 000000000000..de3ae68aa345 --- /dev/null +++ b/tools/testing/selftests/core/Makefile @@ -0,0 +1,6 @@ +CFLAGS += -g -I../../../../usr/include/ -I../../../../include + +TEST_GEN_PROGS := close_range_test + +include ../lib.mk + diff --git a/tools/testing/selftests/core/close_range_test.c b/tools/testing/selftests/core/close_range_test.c new file mode 100644 index 000000000000..d6e6079d3d53 --- /dev/null +++ b/tools/testing/selftests/core/close_range_test.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE +#include <errno.h> +#include <fcntl.h> +#include <linux/kernel.h> +#include <limits.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syscall.h> +#include <unistd.h> + +#include "../kselftest.h" + +static inline int sys_close_range(unsigned int fd, unsigned int max_fd, + unsigned int flags) +{ + return syscall(__NR_close_range, fd, max_fd, flags); +} + +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) +#endif + +int main(int argc, char **argv) +{ + const char *test_name = "close_range"; + int i, ret; + int open_fds[101]; + int fd_max, fd_mid, fd_min; + + ksft_set_plan(9); + + for (i = 0; i < ARRAY_SIZE(open_fds); i++) { + int fd; + + fd = open("/dev/null", O_RDONLY | O_CLOEXEC); + if (fd < 0) { + if (errno == ENOENT) + ksft_exit_skip( + "%s test: skipping test since /dev/null does not exist\n", + test_name); + + ksft_exit_fail_msg( + "%s test: %s - failed to open /dev/null\n", + strerror(errno), test_name); + } + + open_fds[i] = fd; + } + + fd_min = open_fds[0]; + fd_max = open_fds[99]; + + ret = sys_close_range(fd_min, fd_max, 1); + if (!ret) + ksft_exit_fail_msg( + "%s test: managed to pass invalid flag value\n", + test_name); + ksft_test_result_pass("do not allow invalid flag values for close_range()\n"); + + fd_mid = open_fds[50]; + ret = sys_close_range(fd_min, fd_mid, 0); + if (ret < 0) + ksft_exit_fail_msg( + "%s test: Failed to close range of file descriptors from %d to %d\n", + test_name, fd_min, fd_mid); + ksft_test_result_pass("close_range() from %d to %d\n", fd_min, fd_mid); + + for (i = 0; i <= 50; i++) { + ret = fcntl(open_fds[i], F_GETFL); + if (ret >= 0) + ksft_exit_fail_msg( + "%s test: Failed to close range of file descriptors from %d to %d\n", + test_name, fd_min, fd_mid); + } + ksft_test_result_pass("fcntl() verify closed range from %d to %d\n", fd_min, fd_mid); + + /* create a couple of gaps */ + close(57); + close(78); + close(81); + close(82); + close(84); + close(90); + + fd_mid = open_fds[51]; + /* Choose slightly lower limit and leave some fds for a later test */ + fd_max = open_fds[92]; + ret = sys_close_range(fd_mid, fd_max, 0); + if (ret < 0) + ksft_exit_fail_msg( + "%s test: Failed to close range of file descriptors from 51 to 100\n", + test_name); + ksft_test_result_pass("close_range() from %d to %d\n", fd_mid, fd_max); + + for (i = 51; i <= 92; i++) { + ret = fcntl(open_fds[i], F_GETFL); + if (ret >= 0) + ksft_exit_fail_msg( + "%s test: Failed to close range of file descriptors from 51 to 100\n", + test_name); + } + ksft_test_result_pass("fcntl() verify closed range from %d to %d\n", fd_mid, fd_max); + + fd_mid = open_fds[93]; + fd_max = open_fds[99]; + /* test that the kernel caps and still closes all fds */ + ret = sys_close_range(fd_mid, UINT_MAX, 0); + if (ret < 0) + ksft_exit_fail_msg( + "%s test: Failed to close range of file descriptors from 51 to 100\n", + test_name); + ksft_test_result_pass("close_range() from %d to %d\n", fd_mid, fd_max); + + for (i = 93; i < 100; i++) { + ret = fcntl(open_fds[i], F_GETFL); + if (ret >= 0) + ksft_exit_fail_msg( + "%s test: Failed to close range of file descriptors from 51 to 100\n", + test_name); + } + ksft_test_result_pass("fcntl() verify closed range from %d to %d\n", fd_mid, fd_max); + + ret = sys_close_range(open_fds[100], open_fds[100], 0); + if (ret < 0) + ksft_exit_fail_msg( + "%s test: Failed to close single file descriptor\n", + test_name); + ksft_test_result_pass("close_range() closed single file descriptor\n"); + + ret = fcntl(open_fds[100], F_GETFL); + if (ret >= 0) + ksft_exit_fail_msg( + "%s test: Failed to close single file descriptor\n", + test_name); + ksft_test_result_pass("fcntl() verify closed single file descriptor\n"); + + return ksft_exit_pass(); +} -- 2.21.0

6 years, 6 months

2
1
0 0

[PATCH 10/10] docs: fix broken documentation links

by Mauro Carvalho Chehab

Mostly due to x86 and acpi conversion, several documentation links are still pointing to the old file. Fix them. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung(a)kernel.org> --- Documentation/acpi/dsd/leds.txt | 2 +- Documentation/admin-guide/kernel-parameters.rst | 6 +++--- Documentation/admin-guide/kernel-parameters.txt | 16 ++++++++-------- Documentation/admin-guide/ras.rst | 2 +- .../devicetree/bindings/net/fsl-enetc.txt | 7 +++---- .../bindings/pci/amlogic,meson-pcie.txt | 2 +- .../bindings/regulator/qcom,rpmh-regulator.txt | 2 +- Documentation/devicetree/booting-without-of.txt | 2 +- Documentation/driver-api/gpio/board.rst | 2 +- Documentation/driver-api/gpio/consumer.rst | 2 +- .../firmware-guide/acpi/enumeration.rst | 2 +- .../firmware-guide/acpi/method-tracing.rst | 2 +- Documentation/i2c/instantiating-devices | 2 +- Documentation/sysctl/kernel.txt | 4 ++-- .../translations/it_IT/process/4.Coding.rst | 2 +- .../translations/it_IT/process/howto.rst | 2 +- .../it_IT/process/stable-kernel-rules.rst | 4 ++-- .../translations/zh_CN/process/4.Coding.rst | 2 +- Documentation/x86/x86_64/5level-paging.rst | 2 +- Documentation/x86/x86_64/boot-options.rst | 4 ++-- .../x86/x86_64/fake-numa-for-cpusets.rst | 2 +- MAINTAINERS | 6 +++--- arch/arm/Kconfig | 2 +- arch/arm64/kernel/kexec_image.c | 2 +- arch/powerpc/Kconfig | 2 +- arch/x86/Kconfig | 16 ++++++++-------- arch/x86/Kconfig.debug | 2 +- arch/x86/boot/header.S | 2 +- arch/x86/entry/entry_64.S | 2 +- arch/x86/include/asm/bootparam_utils.h | 2 +- arch/x86/include/asm/page_64_types.h | 2 +- arch/x86/include/asm/pgtable_64_types.h | 2 +- arch/x86/kernel/cpu/microcode/amd.c | 2 +- arch/x86/kernel/kexec-bzimage64.c | 2 +- arch/x86/kernel/pci-dma.c | 2 +- arch/x86/mm/tlb.c | 2 +- arch/x86/platform/pvh/enlighten.c | 2 +- drivers/acpi/Kconfig | 10 +++++----- drivers/net/ethernet/faraday/ftgmac100.c | 2 +- .../fieldbus/Documentation/fieldbus_dev.txt | 4 ++-- drivers/vhost/vhost.c | 2 +- include/acpi/acpi_drivers.h | 2 +- include/linux/fs_context.h | 2 +- include/linux/lsm_hooks.h | 2 +- mm/Kconfig | 2 +- security/Kconfig | 2 +- tools/include/linux/err.h | 2 +- tools/objtool/Documentation/stack-validation.txt | 4 ++-- tools/testing/selftests/x86/protection_keys.c | 2 +- 49 files changed, 78 insertions(+), 79 deletions(-) diff --git a/Documentation/acpi/dsd/leds.txt b/Documentation/acpi/dsd/leds.txt index 81a63af42ed2..cc58b1a574c5 100644 --- a/Documentation/acpi/dsd/leds.txt +++ b/Documentation/acpi/dsd/leds.txt @@ -96,4 +96,4 @@ where <URL:http://www.uefi.org/sites/default/files/resources/_DSD-hierarchical-dat…>, referenced 2019-02-21. -[7] Documentation/acpi/dsd/data-node-reference.txt +[7] Documentation/firmware-guide/acpi/dsd/data-node-references.rst diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst index 0124980dca2d..8d3273e32eb1 100644 --- a/Documentation/admin-guide/kernel-parameters.rst +++ b/Documentation/admin-guide/kernel-parameters.rst @@ -167,7 +167,7 @@ parameter is applicable:: X86-32 X86-32, aka i386 architecture is enabled. X86-64 X86-64 architecture is enabled. More X86-64 boot options can be found in - Documentation/x86/x86_64/boot-options.txt . + Documentation/x86/x86_64/boot-options.rst. X86 Either 32-bit or 64-bit x86 (same as X86-32+X86-64) X86_UV SGI UV support is enabled. XEN Xen support is enabled @@ -181,10 +181,10 @@ In addition, the following text indicates that the option:: Parameters denoted with BOOT are actually interpreted by the boot loader, and have no meaning to the kernel directly. Do not modify the syntax of boot loader parameters without extreme -need or coordination with <Documentation/x86/boot.txt>. +need or coordination with <Documentation/x86/boot.rst>. There are also arch-specific kernel-parameters not documented here. -See for example <Documentation/x86/x86_64/boot-options.txt>. +See for example <Documentation/x86/x86_64/boot-options.rst>. Note that ALL kernel parameters listed below are CASE SENSITIVE, and that a trailing = on the name of any parameter states that that parameter will diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 138f6664b2e2..bc5f202d42ec 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -53,7 +53,7 @@ ACPI_DEBUG_PRINT statements, e.g., ACPI_DEBUG_PRINT((ACPI_DB_INFO, ... The debug_level mask defaults to "info". See - Documentation/acpi/debug.txt for more information about + Documentation/firmware-guide/acpi/debug.rst for more information about debug layers and levels. Enable processor driver info messages: @@ -963,7 +963,7 @@ for details. nompx [X86] Disables Intel Memory Protection Extensions. - See Documentation/x86/intel_mpx.txt for more + See Documentation/x86/intel_mpx.rst for more information about the feature. nopku [X86] Disable Memory Protection Keys CPU feature found @@ -1189,7 +1189,7 @@ that is to be dynamically loaded by Linux. If there are multiple variables with the same name but with different vendor GUIDs, all of them will be loaded. See - Documentation/acpi/ssdt-overlays.txt for details. + Documentation/admin-guide/acpi/ssdt-overlays.rst for details. eisa_irq_edge= [PARISC,HW] @@ -2383,7 +2383,7 @@ mce [X86-32] Machine Check Exception - mce=option [X86-64] See Documentation/x86/x86_64/boot-options.txt + mce=option [X86-64] See Documentation/x86/x86_64/boot-options.rst md= [HW] RAID subsystems devices and level See Documentation/admin-guide/md.rst. @@ -2439,7 +2439,7 @@ set according to the CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE kernel config option. - See Documentation/memory-hotplug.txt. + See Documentation/admin-guide/mm/memory-hotplug.rst. memmap=exactmap [KNL,X86] Enable setting of an exact E820 memory map, as specified by the user. @@ -2528,7 +2528,7 @@ mem_encrypt=on: Activate SME mem_encrypt=off: Do not activate SME - Refer to Documentation/x86/amd-memory-encryption.txt + Refer to Documentation/x86/amd-memory-encryption.rst for details on when memory encryption can be activated. mem_sleep_default= [SUSPEND] Default system suspend mode: @@ -3528,7 +3528,7 @@ See Documentation/blockdev/paride.txt. pirq= [SMP,APIC] Manual mp-table setup - See Documentation/x86/i386/IO-APIC.txt. + See Documentation/x86/i386/IO-APIC.rst. plip= [PPT,NET] Parallel port network link Format: { parport<nr> | timid | 0 } @@ -5054,7 +5054,7 @@ Can be used multiple times for multiple devices. vga= [BOOT,X86-32] Select a particular video mode - See Documentation/x86/boot.txt and + See Documentation/x86/boot.rst and Documentation/svga.txt. Use vga=ask for menu. This is actually a boot loader parameter; the value is diff --git a/Documentation/admin-guide/ras.rst b/Documentation/admin-guide/ras.rst index c7495e42e6f4..2b20f5f7380d 100644 --- a/Documentation/admin-guide/ras.rst +++ b/Documentation/admin-guide/ras.rst @@ -199,7 +199,7 @@ Architecture (MCA)\ [#f3]_. mode). .. [#f3] For more details about the Machine Check Architecture (MCA), - please read Documentation/x86/x86_64/machinecheck at the Kernel tree. + please read Documentation/x86/x86_64/machinecheck.rst at the Kernel tree. EDAC - Error Detection And Correction ************************************* diff --git a/Documentation/devicetree/bindings/net/fsl-enetc.txt b/Documentation/devicetree/bindings/net/fsl-enetc.txt index c812e25ae90f..25fc687419db 100644 --- a/Documentation/devicetree/bindings/net/fsl-enetc.txt +++ b/Documentation/devicetree/bindings/net/fsl-enetc.txt @@ -16,8 +16,8 @@ Required properties: In this case, the ENETC node should include a "mdio" sub-node that in turn should contain the "ethernet-phy" node describing the external phy. Below properties are required, their bindings -already defined in ethernet.txt or phy.txt, under -Documentation/devicetree/bindings/net/*. +already defined in Documentation/devicetree/bindings/net/ethernet.txt or +Documentation/devicetree/bindings/net/phy.txt. Required: @@ -51,8 +51,7 @@ Example: connection: In this case, the ENETC port node defines a fixed link connection, -as specified by "fixed-link.txt", under -Documentation/devicetree/bindings/net/*. +as specified by Documentation/devicetree/bindings/net/fixed-link.txt. Required: diff --git a/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt b/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt index 12b18f82d441..efa2c8b9b85a 100644 --- a/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt +++ b/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt @@ -3,7 +3,7 @@ Amlogic Meson AXG DWC PCIE SoC controller Amlogic Meson PCIe host controller is based on the Synopsys DesignWare PCI core. It shares common functions with the PCIe DesignWare core driver and inherits common properties defined in -Documentation/devicetree/bindings/pci/designware-pci.txt. +Documentation/devicetree/bindings/pci/designware-pcie.txt. Additional properties are described here: diff --git a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt index 7ef2dbe48e8a..14d2eee96b3d 100644 --- a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt @@ -97,7 +97,7 @@ Second Level Nodes - Regulators sent for this regulator including those which are for a strictly lower power state. -Other properties defined in Documentation/devicetree/bindings/regulator.txt +Other properties defined in Documentation/devicetree/bindings/regulator/regulator.txt may also be used. regulator-initial-mode and regulator-allowed-modes may be specified for VRM regulators using mode values from include/dt-bindings/regulator/qcom,rpmh-regulator.h. regulator-allow-bypass diff --git a/Documentation/devicetree/booting-without-of.txt b/Documentation/devicetree/booting-without-of.txt index e86bd2f64117..60f8640f2b2f 100644 --- a/Documentation/devicetree/booting-without-of.txt +++ b/Documentation/devicetree/booting-without-of.txt @@ -277,7 +277,7 @@ it with special cases. the decompressor (the real mode entry point goes to the same 32bit entry point once it switched into protected mode). That entry point supports one calling convention which is documented in - Documentation/x86/boot.txt + Documentation/x86/boot.rst The physical pointer to the device-tree block (defined in chapter II) is passed via setup_data which requires at least boot protocol 2.09. The type filed is defined as diff --git a/Documentation/driver-api/gpio/board.rst b/Documentation/driver-api/gpio/board.rst index b37f3f7b8926..ce91518bf9f4 100644 --- a/Documentation/driver-api/gpio/board.rst +++ b/Documentation/driver-api/gpio/board.rst @@ -101,7 +101,7 @@ with the help of _DSD (Device Specific Data), introduced in ACPI 5.1:: } For more information about the ACPI GPIO bindings see -Documentation/acpi/gpio-properties.txt. +Documentation/firmware-guide/acpi/gpio-properties.rst. Platform Data ------------- diff --git a/Documentation/driver-api/gpio/consumer.rst b/Documentation/driver-api/gpio/consumer.rst index 5e4d8aa68913..fdecb6d711db 100644 --- a/Documentation/driver-api/gpio/consumer.rst +++ b/Documentation/driver-api/gpio/consumer.rst @@ -437,7 +437,7 @@ case, it will be handled by the GPIO subsystem automatically. However, if the _DSD is not present, the mappings between GpioIo()/GpioInt() resources and GPIO connection IDs need to be provided by device drivers. -For details refer to Documentation/acpi/gpio-properties.txt +For details refer to Documentation/firmware-guide/acpi/gpio-properties.rst Interacting With the Legacy GPIO Subsystem diff --git a/Documentation/firmware-guide/acpi/enumeration.rst b/Documentation/firmware-guide/acpi/enumeration.rst index 6b32b7be8c85..65f5bb5725ac 100644 --- a/Documentation/firmware-guide/acpi/enumeration.rst +++ b/Documentation/firmware-guide/acpi/enumeration.rst @@ -339,7 +339,7 @@ a code like this:: There are also devm_* versions of these functions which release the descriptors once the device is released. -See Documentation/acpi/gpio-properties.txt for more information about the +See Documentation/firmware-guide/acpi/gpio-properties.rst for more information about the _DSD binding related to GPIOs. MFD devices diff --git a/Documentation/firmware-guide/acpi/method-tracing.rst b/Documentation/firmware-guide/acpi/method-tracing.rst index d0b077b73f5f..0aa7e2c5d32a 100644 --- a/Documentation/firmware-guide/acpi/method-tracing.rst +++ b/Documentation/firmware-guide/acpi/method-tracing.rst @@ -68,7 +68,7 @@ c. Filter out the debug layer/level matched logs when the specified Where: 0xXXXXXXXX/0xYYYYYYYY - Refer to Documentation/acpi/debug.txt for possible debug layer/level + Refer to Documentation/firmware-guide/acpi/debug.rst for possible debug layer/level masking values. \PPPP.AAAA.TTTT.HHHH Full path of a control method that can be found in the ACPI namespace. diff --git a/Documentation/i2c/instantiating-devices b/Documentation/i2c/instantiating-devices index 0d85ac1935b7..5a3e2f331e8c 100644 --- a/Documentation/i2c/instantiating-devices +++ b/Documentation/i2c/instantiating-devices @@ -85,7 +85,7 @@ Method 1c: Declare the I2C devices via ACPI ------------------------------------------- ACPI can also describe I2C devices. There is special documentation for this -which is currently located at Documentation/acpi/enumeration.txt. +which is currently located at Documentation/firmware-guide/acpi/enumeration.rst. Method 2: Instantiate the devices explicitly diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index f0c86fbb3b48..92f7f34b021a 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -155,7 +155,7 @@ is 0x15 and the full version number is 0x234, this file will contain the value 340 = 0x154. See the type_of_loader and ext_loader_type fields in -Documentation/x86/boot.txt for additional information. +Documentation/x86/boot.rst for additional information. ============================================================== @@ -167,7 +167,7 @@ The complete bootloader version number. In the example above, this file will contain the value 564 = 0x234. See the type_of_loader and ext_loader_ver fields in -Documentation/x86/boot.txt for additional information. +Documentation/x86/boot.rst for additional information. ============================================================== diff --git a/Documentation/translations/it_IT/process/4.Coding.rst b/Documentation/translations/it_IT/process/4.Coding.rst index c05b89e616dd..1d23e951491f 100644 --- a/Documentation/translations/it_IT/process/4.Coding.rst +++ b/Documentation/translations/it_IT/process/4.Coding.rst @@ -370,7 +370,7 @@ con cosa stanno lavorando. Consultate: Documentation/ABI/README per avere una descrizione di come questi documenti devono essere impostati e quali informazioni devono essere fornite. -Il file :ref:`Documentation/translations/it_IT/admin-guide/kernel-parameters.rst <kernelparameters>` +Il file :ref:`Documentation/admin-guide/kernel-parameters.rst <kernelparameters>` descrive tutti i parametri di avvio del kernel. Ogni patch che aggiunga nuovi parametri dovrebbe aggiungere nuove voci a questo file. diff --git a/Documentation/translations/it_IT/process/howto.rst b/Documentation/translations/it_IT/process/howto.rst index 9903ac7c566b..44e6077730e8 100644 --- a/Documentation/translations/it_IT/process/howto.rst +++ b/Documentation/translations/it_IT/process/howto.rst @@ -131,7 +131,7 @@ Di seguito una lista di file che sono presenti nei sorgente del kernel e che "Linux kernel patch submission format" http://linux.yyz.us/patch-format.html - :ref:`Documentation/process/translations/it_IT/stable-api-nonsense.rst <it_stable_api_nonsense>` + :ref:`Documentation/translations/it_IT/process/stable-api-nonsense.rst <it_stable_api_nonsense>` Questo file descrive la motivazioni sottostanti la conscia decisione di non avere un API stabile all'interno del kernel, incluso cose come: diff --git a/Documentation/translations/it_IT/process/stable-kernel-rules.rst b/Documentation/translations/it_IT/process/stable-kernel-rules.rst index 48e88e5ad2c5..4f206cee31a7 100644 --- a/Documentation/translations/it_IT/process/stable-kernel-rules.rst +++ b/Documentation/translations/it_IT/process/stable-kernel-rules.rst @@ -33,7 +33,7 @@ Regole sul tipo di patch che vengono o non vengono accettate nei sorgenti - Non deve includere alcuna correzione "banale" (correzioni grammaticali, pulizia dagli spazi bianchi, eccetera). - Deve rispettare le regole scritte in - :ref:`Documentation/translation/it_IT/process/submitting-patches.rst <it_submittingpatches>` + :ref:`Documentation/translations/it_IT/process/submitting-patches.rst <it_submittingpatches>` - Questa patch o una equivalente deve esistere già nei sorgenti principali di Linux @@ -43,7 +43,7 @@ Procedura per sottomettere patch per i sorgenti -stable - Se la patch contiene modifiche a dei file nelle cartelle net/ o drivers/net, allora seguite le linee guida descritte in - :ref:`Documentation/translation/it_IT/networking/netdev-FAQ.rst <it_netdev-FAQ>`; + :ref:`Documentation/translations/it_IT/networking/netdev-FAQ.rst <it_netdev-FAQ>`; ma solo dopo aver verificato al seguente indirizzo che la patch non sia già in coda: https://patchwork.ozlabs.org/bundle/davem/stable/?series=&submitter=&state=… diff --git a/Documentation/translations/zh_CN/process/4.Coding.rst b/Documentation/translations/zh_CN/process/4.Coding.rst index 5301e9d55255..8bb777941394 100644 --- a/Documentation/translations/zh_CN/process/4.Coding.rst +++ b/Documentation/translations/zh_CN/process/4.Coding.rst @@ -241,7 +241,7 @@ scripts/coccinelle目录下已经打包了相当多的内核“语义补丁” 任何添加新用户空间界面的代码（包括新的sysfs或/proc文件）都应该包含该界面的文档，该文档使用户空间开发人员能够知道他们在使用什么。请参阅 -Documentation/abi/readme，了解如何格式化此文档以及需要提供哪些信息。 +Documentation/ABI/README，了解如何格式化此文档以及需要提供哪些信息。文件 :ref:`Documentation/admin-guide/kernel-parameters.rst <kernelparameters>` 描述了内核的所有引导时间参数。任何添加新参数的补丁都应该向该文件添加适当的 diff --git a/Documentation/x86/x86_64/5level-paging.rst b/Documentation/x86/x86_64/5level-paging.rst index ab88a4514163..44856417e6a5 100644 --- a/Documentation/x86/x86_64/5level-paging.rst +++ b/Documentation/x86/x86_64/5level-paging.rst @@ -20,7 +20,7 @@ physical address space. This "ought to be enough for anybody" ©. QEMU 2.9 and later support 5-level paging. Virtual memory layout for 5-level paging is described in -Documentation/x86/x86_64/mm.txt +Documentation/x86/x86_64/mm.rst Enabling 5-level paging diff --git a/Documentation/x86/x86_64/boot-options.rst b/Documentation/x86/x86_64/boot-options.rst index 2f69836b8445..6a4285a3c7a4 100644 --- a/Documentation/x86/x86_64/boot-options.rst +++ b/Documentation/x86/x86_64/boot-options.rst @@ -9,7 +9,7 @@ only the AMD64 specific ones are listed here. Machine check ============= -Please see Documentation/x86/x86_64/machinecheck for sysfs runtime tunables. +Please see Documentation/x86/x86_64/machinecheck.rst for sysfs runtime tunables. mce=off Disable machine check @@ -89,7 +89,7 @@ APICs Don't use the local APIC (alias for i386 compatibility) pirq=... - See Documentation/x86/i386/IO-APIC.txt + See Documentation/x86/i386/IO-APIC.rst noapictimer Don't set up the APIC timer diff --git a/Documentation/x86/x86_64/fake-numa-for-cpusets.rst b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst index 74fbb78b3c67..04df57b9aa3f 100644 --- a/Documentation/x86/x86_64/fake-numa-for-cpusets.rst +++ b/Documentation/x86/x86_64/fake-numa-for-cpusets.rst @@ -18,7 +18,7 @@ For more information on the features of cpusets, see Documentation/cgroup-v1/cpusets.txt. There are a number of different configurations you can use for your needs. For more information on the numa=fake command line option and its various ways of -configuring fake nodes, see Documentation/x86/x86_64/boot-options.txt. +configuring fake nodes, see Documentation/x86/x86_64/boot-options.rst. For the purposes of this introduction, we'll assume a very primitive NUMA emulation setup of "numa=fake=4*512,". This will split our system memory into diff --git a/MAINTAINERS b/MAINTAINERS index 0c84bf76d165..47aa4f6defb9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3874,7 +3874,7 @@ F: Documentation/devicetree/bindings/hwmon/cirrus,lochnagar.txt F: Documentation/devicetree/bindings/pinctrl/cirrus,lochnagar.txt F: Documentation/devicetree/bindings/regulator/cirrus,lochnagar.txt F: Documentation/devicetree/bindings/sound/cirrus,lochnagar.txt -F: Documentation/hwmon/lochnagar +F: Documentation/hwmon/lochnagar.rst CISCO FCOE HBA DRIVER M: Satish Kharat <satishkh(a)cisco.com> @@ -11272,7 +11272,7 @@ NXP FXAS21002C DRIVER M: Rui Miguel Silva <rmfrfs(a)gmail.com> L: linux-iio(a)vger.kernel.org S: Maintained -F: Documentation/devicetree/bindings/iio/gyroscope/fxas21002c.txt +F: Documentation/devicetree/bindings/iio/gyroscope/nxp,fxas21002c.txt F: drivers/iio/gyro/fxas21002c_core.c F: drivers/iio/gyro/fxas21002c.h F: drivers/iio/gyro/fxas21002c_i2c.c @@ -13043,7 +13043,7 @@ M: Niklas Cassel <niklas.cassel(a)linaro.org> L: netdev(a)vger.kernel.org S: Maintained F: drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c -F: Documentation/devicetree/bindings/net/qcom,dwmac.txt +F: Documentation/devicetree/bindings/net/qcom,ethqos.txt QUALCOMM GENERIC INTERFACE I2C DRIVER M: Alok Chauhan <alokc(a)codeaurora.org> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 8869742a85df..0f220264cc23 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1263,7 +1263,7 @@ config SMP uniprocessor machines. On a uniprocessor machine, the kernel will run faster if you say N here. - See also <file:Documentation/x86/i386/IO-APIC.txt>, + See also <file:Documentation/x86/i386/IO-APIC.rst>, <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO available at <http://tldp.org/HOWTO/SMP-HOWTO.html>. diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c index 07bf740bea91..31cc2f423aa8 100644 --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -53,7 +53,7 @@ static void *image_load(struct kimage *image, /* * We require a kernel with an unambiguous Image header. Per - * Documentation/booting.txt, this is the case when image_size + * Documentation/arm64/booting.txt, this is the case when image_size * is non-zero (practically speaking, since v3.17). */ h = (struct arm64_image_header *)kernel; diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 8c1c636308c8..e868d2bd48b8 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -898,7 +898,7 @@ config PPC_MEM_KEYS page-based protections, but without requiring modification of the page tables when an application changes protection domains. - For details, see Documentation/vm/protection-keys.rst + For details, see Documentation/x86/protection-keys.rst If unsure, say y. diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2bbbd4d1ba31..78fdf2dd71d1 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -395,7 +395,7 @@ config SMP Y to "Enhanced Real Time Clock Support", below. The "Advanced Power Management" code will be disabled if you say Y here. - See also <file:Documentation/x86/i386/IO-APIC.txt>, + See also <file:Documentation/x86/i386/IO-APIC.rst>, <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. @@ -1290,7 +1290,7 @@ config MICROCODE the Linux kernel. The preferred method to load microcode from a detached initrd is described - in Documentation/x86/microcode.txt. For that you need to enable + in Documentation/x86/microcode.rst. For that you need to enable CONFIG_BLK_DEV_INITRD in order for the loader to be able to scan the initrd for microcode blobs. @@ -1329,7 +1329,7 @@ config MICROCODE_OLD_INTERFACE It is inadequate because it runs too late to be able to properly load microcode on a machine and it needs special tools. Instead, you should've switched to the early loading method with the initrd or - builtin microcode by now: Documentation/x86/microcode.txt + builtin microcode by now: Documentation/x86/microcode.rst config X86_MSR tristate "/dev/cpu/*/msr - Model-specific register support" @@ -1478,7 +1478,7 @@ config X86_5LEVEL A kernel with the option enabled can be booted on machines that support 4- or 5-level paging. - See Documentation/x86/x86_64/5level-paging.txt for more + See Documentation/x86/x86_64/5level-paging.rst for more information. Say N if unsure. @@ -1626,7 +1626,7 @@ config ARCH_MEMORY_PROBE depends on X86_64 && MEMORY_HOTPLUG help This option enables a sysfs memory/probe interface for testing. - See Documentation/memory-hotplug.txt for more information. + See Documentation/admin-guide/mm/memory-hotplug.rst for more information. If you are unsure how to answer this question, answer N. config ARCH_PROC_KCORE_TEXT @@ -1783,7 +1783,7 @@ config MTRR You can safely say Y even if your machine doesn't have MTRRs, you'll just add about 9 KB to your kernel. - See <file:Documentation/x86/mtrr.txt> for more information. + See <file:Documentation/x86/mtrr.rst> for more information. config MTRR_SANITIZER def_bool y @@ -1895,7 +1895,7 @@ config X86_INTEL_MPX process and adds some branches to paths used during exec() and munmap(). - For details, see Documentation/x86/intel_mpx.txt + For details, see Documentation/x86/intel_mpx.rst If unsure, say N. @@ -1911,7 +1911,7 @@ config X86_INTEL_MEMORY_PROTECTION_KEYS page-based protections, but without requiring modification of the page tables when an application changes protection domains. - For details, see Documentation/x86/protection-keys.txt + For details, see Documentation/x86/protection-keys.rst If unsure, say y. diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index f730680dc818..59f598543203 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -156,7 +156,7 @@ config IOMMU_DEBUG code. When you use it make sure you have a big enough IOMMU/AGP aperture. Most of the options enabled by this can be set more finegrained using the iommu= command line - options. See Documentation/x86/x86_64/boot-options.txt for more + options. See Documentation/x86/x86_64/boot-options.rst for more details. config IOMMU_LEAK diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 850b8762e889..90d791ca1a95 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -313,7 +313,7 @@ start_sys_seg: .word SYSSEG # obsolete and meaningless, but just type_of_loader: .byte 0 # 0 means ancient bootloader, newer # bootloaders know to change this. - # See Documentation/x86/boot.txt for + # See Documentation/x86/boot.rst for # assigned ids # flags, unused bits must be zero (RFU) bit within loadflags diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 11aa3b2afa4d..33f9fc38d014 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -8,7 +8,7 @@ * * entry.S contains the system-call and fault low-level handling routines. * - * Some of this is documented in Documentation/x86/entry_64.txt + * Some of this is documented in Documentation/x86/entry_64.rst * * A note on terminology: * - iret frame: Architecture defined interrupt frame from SS to RIP diff --git a/arch/x86/include/asm/bootparam_utils.h b/arch/x86/include/asm/bootparam_utils.h index f6f6ef436599..101eb944f13c 100644 --- a/arch/x86/include/asm/bootparam_utils.h +++ b/arch/x86/include/asm/bootparam_utils.h @@ -24,7 +24,7 @@ static void sanitize_boot_params(struct boot_params *boot_params) * IMPORTANT NOTE TO BOOTLOADER AUTHORS: do not simply clear * this field. The purpose of this field is to guarantee * compliance with the x86 boot spec located in - * Documentation/x86/boot.txt . That spec says that the + * Documentation/x86/boot.rst . That spec says that the * *whole* structure should be cleared, after which only the * portion defined by struct setup_header (boot_params->hdr) * should be copied in. diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index 793c14c372cb..288b065955b7 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -48,7 +48,7 @@ #define __START_KERNEL_map _AC(0xffffffff80000000, UL) -/* See Documentation/x86/x86_64/mm.txt for a description of the memory map. */ +/* See Documentation/x86/x86_64/mm.rst for a description of the memory map. */ #define __PHYSICAL_MASK_SHIFT 52 diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h index 88bca456da99..52e5f5f2240d 100644 --- a/arch/x86/include/asm/pgtable_64_types.h +++ b/arch/x86/include/asm/pgtable_64_types.h @@ -103,7 +103,7 @@ extern unsigned int ptrs_per_p4d; #define PGDIR_MASK (~(PGDIR_SIZE - 1)) /* - * See Documentation/x86/x86_64/mm.txt for a description of the memory map. + * See Documentation/x86/x86_64/mm.rst for a description of the memory map. * * Be very careful vs. KASLR when changing anything here. The KASLR address * range must not overlap with anything except the KASAN shadow area, which diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index e1f3ba19ba54..06d4e67f31ab 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -61,7 +61,7 @@ static u8 amd_ucode_patch[PATCH_MAX_SIZE]; /* * Microcode patch container file is prepended to the initrd in cpio - * format. See Documentation/x86/microcode.txt + * format. See Documentation/x86/microcode.rst */ static const char ucode_path[] __maybe_unused = "kernel/x86/microcode/AuthenticAMD.bin"; diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index 22f60dd26460..b07e7069b09e 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -416,7 +416,7 @@ static void *bzImage64_load(struct kimage *image, char *kernel, efi_map_offset = params_cmdline_sz; efi_setup_data_offset = efi_map_offset + ALIGN(efi_map_sz, 16); - /* Copy setup header onto bootparams. Documentation/x86/boot.txt */ + /* Copy setup header onto bootparams. Documentation/x86/boot.rst */ setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset; /* Is there a limit on setup header size? */ diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index dcd272dbd0a9..f62b498b18fb 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -70,7 +70,7 @@ void __init pci_iommu_alloc(void) } /* - * See <Documentation/x86/x86_64/boot-options.txt> for the iommu kernel + * See <Documentation/x86/x86_64/boot-options.rst> for the iommu kernel * parameter documentation. */ static __init int iommu_setup(char *p) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 7f61431c75fb..400c1ba033aa 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -711,7 +711,7 @@ void native_flush_tlb_others(const struct cpumask *cpumask, } /* - * See Documentation/x86/tlb.txt for details. We choose 33 + * See Documentation/x86/tlb.rst for details. We choose 33 * because it is large enough to cover the vast majority (at * least 95%) of allocations, and is small enough that we are * confident it will not cause too much overhead. Each single diff --git a/arch/x86/platform/pvh/enlighten.c b/arch/x86/platform/pvh/enlighten.c index 1861a2ba0f2b..c0a502f7e3a7 100644 --- a/arch/x86/platform/pvh/enlighten.c +++ b/arch/x86/platform/pvh/enlighten.c @@ -86,7 +86,7 @@ static void __init init_pvh_bootparams(bool xen_guest) } /* - * See Documentation/x86/boot.txt. + * See Documentation/x86/boot.rst. * * Version 2.12 supports Xen entry point but we will use default x86/PC * environment (i.e. hardware_subarch 0). diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 283ee94224c6..2438f37f2ca1 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -333,7 +333,7 @@ config ACPI_CUSTOM_DSDT_FILE depends on !STANDALONE help This option supports a custom DSDT by linking it into the kernel. - See Documentation/acpi/dsdt-override.txt + See Documentation/admin-guide/acpi/dsdt-override.rst Enter the full path name to the file which includes the AmlCode or dsdt_aml_code declaration. @@ -355,7 +355,7 @@ config ACPI_TABLE_UPGRADE This option provides functionality to upgrade arbitrary ACPI tables via initrd. No functional change if no ACPI tables are passed via initrd, therefore it's safe to say Y. - See Documentation/acpi/initrd_table_override.txt for details + See Documentation/admin-guide/acpi/initrd_table_override.rst for details config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD bool "Override ACPI tables from built-in initrd" @@ -365,7 +365,7 @@ config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD This option provides functionality to override arbitrary ACPI tables from built-in uncompressed initrd. - See Documentation/acpi/initrd_table_override.txt for details + See Documentation/admin-guide/acpi/initrd_table_override.rst for details config ACPI_DEBUG bool "Debug Statements" @@ -374,7 +374,7 @@ config ACPI_DEBUG output and increases the kernel size by around 50K. Use the acpi.debug_layer and acpi.debug_level kernel command-line - parameters documented in Documentation/acpi/debug.txt and + parameters documented in Documentation/firmware-guide/acpi/debug.rst and Documentation/admin-guide/kernel-parameters.rst to control the type and amount of debug output. @@ -445,7 +445,7 @@ config ACPI_CUSTOM_METHOD help This debug facility allows ACPI AML methods to be inserted and/or replaced without rebooting the system. For details refer to: - Documentation/acpi/method-customizing.txt. + Documentation/firmware-guide/acpi/method-customizing.rst. NOTE: This option is security sensitive, because it allows arbitrary kernel memory to be written to by root (uid=0) users, allowing them diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index b17b79e612a3..ac6280ad43a1 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1075,7 +1075,7 @@ static int ftgmac100_mii_probe(struct ftgmac100 *priv, phy_interface_t intf) } /* Indicate that we support PAUSE frames (see comment in - * Documentation/networking/phy.txt) + * Documentation/networking/phy.rst) */ phy_support_asym_pause(phydev); diff --git a/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt b/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt index 56af3f650fa3..89fb8e14676f 100644 --- a/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt +++ b/drivers/staging/fieldbus/Documentation/fieldbus_dev.txt @@ -54,8 +54,8 @@ a limited few common behaviours and properties. This allows us to define a simple interface consisting of a character device and a set of sysfs files: See: -Documentation/ABI/testing/sysfs-class-fieldbus-dev -Documentation/ABI/testing/fieldbus-dev-cdev +drivers/staging/fieldbus/Documentation/ABI/sysfs-class-fieldbus-dev +drivers/staging/fieldbus/Documentation/ABI/fieldbus-dev-cdev Note that this simple interface does not provide a way to modify adapter configuration settings. It is therefore useful only for adapters that get their diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 1e3ed41ae1f3..69938dbae2d0 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1694,7 +1694,7 @@ EXPORT_SYMBOL_GPL(vhost_dev_ioctl); /* TODO: This is really inefficient. We need something like get_user() * (instruction directly accesses the data, with an exception table entry - * returning -EFAULT). See Documentation/x86/exception-tables.txt. + * returning -EFAULT). See Documentation/x86/exception-tables.rst. */ static int set_bit_to_user(int nr, void __user *addr) { diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h index de1804aeaf69..98e3db7a89cd 100644 --- a/include/acpi/acpi_drivers.h +++ b/include/acpi/acpi_drivers.h @@ -25,7 +25,7 @@ #define ACPI_MAX_STRING 80 /* - * Please update drivers/acpi/debug.c and Documentation/acpi/debug.txt + * Please update drivers/acpi/debug.c and Documentation/firmware-guide/acpi/debug.rst * if you add to this list. */ #define ACPI_BUS_COMPONENT 0x00010000 diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h index 1f966670c8dc..623eb58560b9 100644 --- a/include/linux/fs_context.h +++ b/include/linux/fs_context.h @@ -85,7 +85,7 @@ struct fs_parameter { * Superblock creation fills in ->root whereas reconfiguration begins with this * already set. * - * See Documentation/filesystems/mounting.txt + * See Documentation/filesystems/mount_api.txt */ struct fs_context { const struct fs_context_operations *ops; diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 47f58cfb6a19..df1318d85f7d 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -77,7 +77,7 @@ * state. This is called immediately after commit_creds(). * * Security hooks for mount using fs_context. - * [See also Documentation/filesystems/mounting.txt] + * [See also Documentation/filesystems/mount_api.txt] * * @fs_context_dup: * Allocate and attach a security structure to sc->security. This pointer diff --git a/mm/Kconfig b/mm/Kconfig index ee8d1f311858..6e5fb81bde4b 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -165,7 +165,7 @@ config MEMORY_HOTPLUG_DEFAULT_ONLINE onlining policy (/sys/devices/system/memory/auto_online_blocks) which determines what happens to newly added memory regions. Policy setting can always be changed at runtime. - See Documentation/memory-hotplug.txt for more information. + See Documentation/admin-guide/mm/memory-hotplug.rst for more information. Say Y here if you want all hot-plugged memory blocks to appear in 'online' state by default. diff --git a/security/Kconfig b/security/Kconfig index aeac3676dd4d..6d75ed71970c 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -62,7 +62,7 @@ config PAGE_TABLE_ISOLATION ensuring that the majority of kernel addresses are not mapped into userspace. - See Documentation/x86/pti.txt for more details. + See Documentation/x86/pti.rst for more details. config SECURITY_INFINIBAND bool "Infiniband Security Hooks" diff --git a/tools/include/linux/err.h b/tools/include/linux/err.h index 2f5a12b88a86..25f2bb3a991d 100644 --- a/tools/include/linux/err.h +++ b/tools/include/linux/err.h @@ -20,7 +20,7 @@ * Userspace note: * The same principle works for userspace, because 'error' pointers * fall down to the unused hole far from user space, as described - * in Documentation/x86/x86_64/mm.txt for x86_64 arch: + * in Documentation/x86/x86_64/mm.rst for x86_64 arch: * * 0000000000000000 - 00007fffffffffff (=47 bits) user space, different per mm hole caused by [48:63] sign extension * ffffffffffe00000 - ffffffffffffffff (=2 MB) unused hole diff --git a/tools/objtool/Documentation/stack-validation.txt b/tools/objtool/Documentation/stack-validation.txt index 4dd11a554b9b..de094670050b 100644 --- a/tools/objtool/Documentation/stack-validation.txt +++ b/tools/objtool/Documentation/stack-validation.txt @@ -21,7 +21,7 @@ instructions). Similarly, it knows how to follow switch statements, for which gcc sometimes uses jump tables. (Objtool also has an 'orc generate' subcommand which generates debuginfo -for the ORC unwinder. See Documentation/x86/orc-unwinder.txt in the +for the ORC unwinder. See Documentation/x86/orc-unwinder.rst in the kernel tree for more details.) @@ -101,7 +101,7 @@ b) ORC (Oops Rewind Capability) unwind table generation band. So it doesn't affect runtime performance and it can be reliable even when interrupts or exceptions are involved. - For more details, see Documentation/x86/orc-unwinder.txt. + For more details, see Documentation/x86/orc-unwinder.rst. c) Higher live patching compatibility rate diff --git a/tools/testing/selftests/x86/protection_keys.c b/tools/testing/selftests/x86/protection_keys.c index 5d546dcdbc80..798a5ddeee55 100644 --- a/tools/testing/selftests/x86/protection_keys.c +++ b/tools/testing/selftests/x86/protection_keys.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Tests x86 Memory Protection Keys (see Documentation/x86/protection-keys.txt) + * Tests x86 Memory Protection Keys (see Documentation/x86/protection-keys.rst) * * There are examples in here of: * * how to set protection keys on memory -- 2.21.0

6 years, 6 months

4
3
0 0

[PATCH] KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION

by Christian Borntraeger

kselftests exposed a problem in the s390 handling for memory slots. Right now we only do proper memory slot handling for creation of new memory slots. Neither MOVE, nor DELETION are handled properly. Let us implement those. Signed-off-by: Christian Borntraeger <borntraeger(a)de.ibm.com> --- arch/s390/kvm/kvm-s390.c | 35 +++++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 14 deletions(-) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 871d2e99b156..6ec0685ab2c7 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -4525,21 +4525,28 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, const struct kvm_memory_slot *new, enum kvm_mr_change change) { - int rc; + int rc = 0; - /* If the basics of the memslot do not change, we do not want - * to update the gmap. Every update causes several unnecessary - * segment translation exceptions. This is usually handled just - * fine by the normal fault handler + gmap, but it will also - * cause faults on the prefix page of running guest CPUs. - */ - if (old->userspace_addr == mem->userspace_addr && - old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && - old->npages * PAGE_SIZE == mem->memory_size) - return; - - rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, - mem->guest_phys_addr, mem->memory_size); + switch (change) { + case KVM_MR_DELETE: + rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE, + old->npages * PAGE_SIZE); + break; + case KVM_MR_MOVE: + rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE, + old->npages * PAGE_SIZE); + if (rc) + break; + /* FALLTHROUGH */ + case KVM_MR_CREATE: + rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, + mem->guest_phys_addr, mem->memory_size); + break; + case KVM_MR_FLAGS_ONLY: + break; + default: + WARN(1, "Unknown KVM MR CHANGE: %d\n", change); + } if (rc) pr_warn("failed to commit memory region\n"); return; -- 2.21.0

6 years, 6 months

3
3
0 0

[PATCH v2 1/3] kselftest/cgroup: fix unexpected testing failure on test_memcontrol

by Alex Shi

The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..73612d604a2a 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set root memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.19.1.856.g8858448bb

6 years, 6 months

3
4
0 0

[PATCH v3 1/3] kselftest/cgroup: fix unexpected testing failure on test_memcontrol

by Alex Shi

The cgroup testing relies on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> Acked-by: Tejun Heo <tj(a)kernel.org> --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..c19a97dd02d4 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.19.1.856.g8858448bb

6 years, 6 months

1
2
0 0

[PATCH net v2 0/1] Allow TX timestamp with UDP GSO

by Fred Klassen

Fixes an issue where TX Timestamps are not arriving on the error queue when UDP_SEGMENT CMSG type is combined with CMSG type SO_TIMESTAMPING. This is version 2 which moves the tests to net-next. Fred Klassen (1): net/udp_gso: Allow TX timestamp with UDP GSO net/ipv4/udp_offload.c | 4 ++++ 1 file changed, 4 insertions(+) -- 2.11.0

6 years, 6 months

2
2
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[GIT PULL] Kselftest fixes update for Linux 5.2-rc2

by Shuah Khan

Hi Linus, Please pull the following Kselftest fixes update for Linux 5.2-rc2. This Kselftest fixes update for Linux 5.2-rc2 consists of: - 2 fixes to regressions introduced in kselftest Makefile test run output refactoring work from Kees Cook. - Adding Atom support to syscall_arg_fault test from Tong Bo. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit a188339ca5a396acc588e5851ed7e19f66b0ebd9: Linux 5.2-rc1 (2019-05-19 15:47:09 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-5.2-rc2 for you to fetch changes up to fe48319243a626c860fd666ca032daacc2ba84a5: selftests/timers: Add missing fflush(stdout) calls (2019-05-21 09:24:31 -0600) ---------------------------------------------------------------- linux-kselftest-5.2-rc2 This Kselftest fixes update for Linux 5.2-rc2 consists of: - 2 fixes to regressions introduced in kselftest Makefile test run output refactoring work from Kees Cook. - Adding Atom support to syscall_arg_fault test from Tong Bo. ---------------------------------------------------------------- Kees Cook (2): selftests: Remove forced unbuffering for test running selftests/timers: Add missing fflush(stdout) calls Tong Bo (1): selftests/x86: Support Atom for syscall_arg_fault test tools/testing/selftests/kselftest/runner.sh | 12 +----------- tools/testing/selftests/timers/adjtick.c | 1 + tools/testing/selftests/timers/leapcrash.c | 1 + tools/testing/selftests/timers/mqueue-lat.c | 1 + tools/testing/selftests/timers/nanosleep.c | 1 + tools/testing/selftests/timers/nsleep-lat.c | 1 + tools/testing/selftests/timers/raw_skew.c | 1 + tools/testing/selftests/timers/set-tai.c | 1 + tools/testing/selftests/timers/set-tz.c | 2 ++ tools/testing/selftests/timers/threadtest.c | 1 + tools/testing/selftests/timers/valid-adjtimex.c | 2 ++ tools/testing/selftests/x86/syscall_arg_fault.c | 10 ++++++++-- 12 files changed, 21 insertions(+), 13 deletions(-) ----------------------------------------------------------------

6 years, 6 months

2
1
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[PATCH bpf-next v2 RESEND 0/2] Move bpf_printk to bpf_helpers.h

by Michal Rostecki

This series of patches move the commonly used bpf_printk macro to bpf_helpers.h which is already included in all BPF programs which defined that macro on their own. v1->v2: - If HBM_DEBUG is not defined in hbm sample, undefine bpf_printk and set an empty macro for it. Michal Rostecki (2): selftests: bpf: Move bpf_printk to bpf_helpers.h samples: bpf: Do not define bpf_printk macro samples/bpf/hbm_kern.h | 11 ++--------- samples/bpf/tcp_basertt_kern.c | 7 ------- samples/bpf/tcp_bufs_kern.c | 7 ------- samples/bpf/tcp_clamp_kern.c | 7 ------- samples/bpf/tcp_cong_kern.c | 7 ------- samples/bpf/tcp_iw_kern.c | 7 ------- samples/bpf/tcp_rwnd_kern.c | 7 ------- samples/bpf/tcp_synrto_kern.c | 7 ------- samples/bpf/tcp_tos_reflect_kern.c | 7 ------- samples/bpf/xdp_sample_pkts_kern.c | 7 ------- tools/testing/selftests/bpf/bpf_helpers.h | 8 ++++++++ .../testing/selftests/bpf/progs/sockmap_parse_prog.c | 7 ------- .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 7 ------- .../selftests/bpf/progs/sockmap_verdict_prog.c | 7 ------- .../testing/selftests/bpf/progs/test_lwt_seg6local.c | 7 ------- tools/testing/selftests/bpf/progs/test_xdp_noinline.c | 7 ------- tools/testing/selftests/bpf/test_sockmap_kern.h | 7 ------- 17 files changed, 10 insertions(+), 114 deletions(-) -- 2.21.0

6 years, 6 months

3
4
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[PATCH] KVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard

by Thomas Huth

struct kvm_nested_state is only available on x86 so far. To be able to compile the code on other architectures as well, we need to wrap the related code with #ifdefs. Signed-off-by: Thomas Huth <thuth(a)redhat.com> --- tools/testing/selftests/kvm/include/kvm_util.h | 2 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 8c6b9619797d..a5a4b28f14d8 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -118,10 +118,12 @@ void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_vcpu_events *events); void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_vcpu_events *events); +#ifdef __x86_64__ void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_nested_state *state); int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_nested_state *state, bool ignore_error); +#endif const char *exit_reason_str(unsigned int exit_reason); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index cf62de377310..633b22df46a4 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1248,6 +1248,7 @@ void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid, ret, errno); } +#ifdef __x86_64__ void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_nested_state *state) { @@ -1279,6 +1280,7 @@ int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid, return ret; } +#endif /* * VM VCPU System Regs Get -- 2.21.0

6 years, 6 months

3
2
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Re: about selftests/rtc test related stuff

by Alexandre Belloni

On 23/05/2019 22:29:36+0530, Jeffrin Thalakkottoor wrote: > I get the following result when i run "rtctest" > please see the following.... > -----------------x------------------------x----------------- > $pwd > /home/jeffrin/upstream/linux-kselftest/tools/testing/selftests/rtc > $./rtctest > [==========] Running 7 tests from 2 test cases. > [ RUN ] rtc.date_read > rtctest.c:32:rtc.date_read:Expected -1 (18446744073709551615) != > self->fd (18446744073709551615) > rtc.date_read: Test terminated by assertion Your user probably doesn't have access to the rtc device file. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

6 years, 6 months

2
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[PATCH v1 1/2] open: add close_range()

by Christian Brauner

This adds the close_range() syscall. It allows to efficiently close a range of file descriptors up to all file descriptors of a calling task. The syscall came up in a recent discussion around the new mount API and making new file descriptor types cloexec by default. During this discussion, Al suggested the close_range() syscall (cf. [1]). Note, a syscall in this manner has been requested by various people over time. First, it helps to close all file descriptors of an exec()ing task. This can be done safely via (quoting Al's example from [1] verbatim): /* that exec is sensitive */ unshare(CLONE_FILES); /* we don't want anything past stderr here */ close_range(3, ~0U); execve(....); The code snippet above is one way of working around the problem that file descriptors are not cloexec by default. This is aggravated by the fact that we can't just switch them over without massively regressing userspace. For a whole class of programs having an in-kernel method of closing all file descriptors is very helpful (e.g. demons, service managers, programming language standard libraries, container managers etc.). (Please note, unshare(CLONE_FILES) should only be needed if the calling task is multi-threaded and shares the file descriptor table with another thread in which case two threads could race with one thread allocating file descriptors and the other one closing them via close_range(). For the general case close_range() before the execve() is sufficient.) Second, it allows userspace to avoid implementing closing all file descriptors by parsing through /proc/<pid>/fd/* and calling close() on each file descriptor. From looking at various large(ish) userspace code bases this or similar patterns are very common in: - service managers (cf. [4]) - libcs (cf. [6]) - container runtimes (cf. [5]) - programming language runtimes/standard libraries - Python (cf. [2]) - Rust (cf. [7], [8]) As Dmitry pointed out there's even a long-standing glibc bug about missing kernel support for this task (cf. [3]). In addition, the syscall will also work for tasks that do not have procfs mounted and on kernels that do not have procfs support compiled in. In such situations the only way to make sure that all file descriptors are closed is to call close() on each file descriptor up to UINT_MAX or RLIMIT_NOFILE, OPEN_MAX trickery (cf. comment [8] on Rust). The performance is striking. For good measure, comparing the following simple close_all_fds() userspace implementation that is essentially just glibc's version in [6]: static int close_all_fds(void) { int dir_fd; DIR *dir; struct dirent *direntp; dir = opendir("/proc/self/fd"); if (!dir) return -1; dir_fd = dirfd(dir); while ((direntp = readdir(dir))) { int fd; if (strcmp(direntp->d_name, ".") == 0) continue; if (strcmp(direntp->d_name, "..") == 0) continue; fd = atoi(direntp->d_name); if (fd == dir_fd || fd == 0 || fd == 1 || fd == 2) continue; close(fd); } closedir(dir); return 0; } to close_range() yields: 1. closing 4 open files: - close_all_fds(): ~280 us - close_range(): ~24 us 2. closing 1000 open files: - close_all_fds(): ~5000 us - close_range(): ~800 us close_range() is designed to allow for some flexibility. Specifically, it does not simply always close all open file descriptors of a task. Instead, callers can specify an upper bound. This is e.g. useful for scenarios where specific file descriptors are created with well-known numbers that are supposed to be excluded from getting closed. For extra paranoia close_range() comes with a flags argument. This can e.g. be used to implement extension. Once can imagine userspace wanting to stop at the first error instead of ignoring errors under certain circumstances. There might be other valid ideas in the future. In any case, a flag argument doesn't hurt and keeps us on the safe side. >From an implementation side this is kept rather dumb. It saw some input from David and Jann but all nonsense is obviously my own! - Errors to close file descriptors are currently ignored. (Could be changed by setting a flag in the future if needed.) - __close_range() is a rather simplistic wrapper around __close_fd(). My reasoning behind this is based on the nature of how __close_fd() needs to release an fd. But maybe I misunderstood specifics: We take the files_lock and rcu-dereference the fdtable of the calling task, we find the entry in the fdtable, get the file and need to release files_lock before calling filp_close(). In the meantime the fdtable might have been altered so we can't just retake the spinlock and keep the old rcu-reference of the fdtable around. Instead we need to grab a fresh reference to the fdtable. If my reasoning is correct then there's really no point in fancyfying __close_range(): We just need to rcu-dereference the fdtable of the calling task once to cap the max_fd value correctly and then go on calling __close_fd() in a loop. /* References */ [1]: https://lore.kernel.org/lkml/20190516165021.GD17978@ZenIV.linux.org.uk/ [2]: https://github.com/python/cpython/blob/9e4f2f3a6b8ee995c365e86d976937c141d8… [3]: https://sourceware.org/bugzilla/show_bug.cgi?id=10353#c7 [4]: https://github.com/systemd/systemd/blob/5238e9575906297608ff802a27e2ff9effa… [5]: https://github.com/lxc/lxc/blob/ddf4b77e11a4d08f09b7b9cd13e593f8c047edc5/sr… [6]: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/gr… Note that this is an internal implementation that is not exported. Currently, libc seems to not provide an exported version of this because of missing kernel support to do this. [7]: https://github.com/rust-lang/rust/issues/12148 [8]: https://github.com/rust-lang/rust/blob/5f47c0613ed4eb46fca3633c1297364c09e5… Rust's solution is slightly different but is equally unperformant. Rust calls getdtablesize() which is a glibc library function that simply returns the current RLIMIT_NOFILE or OPEN_MAX values. Rust then goes on to call close() on each fd. That's obviously overkill for most tasks. Rarely, tasks - especially non-demons - hit RLIMIT_NOFILE or OPEN_MAX. Let's be nice and assume an unprivileged user with RLIMIT_NOFILE set to 1024. Even in this case, there's a very high chance that in the common case Rust is calling the close() syscall 1021 times pointlessly if the task just has 0, 1, and 2 open. Suggested-by: Al Viro <viro(a)zeniv.linux.org.uk> Signed-off-by: Christian Brauner <christian(a)brauner.io> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Dmitry V. Levin <ldv(a)altlinux.org> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Florian Weimer <fweimer(a)redhat.com> Cc: linux-api(a)vger.kernel.org --- v1: - Linus Torvalds <torvalds(a)linux-foundation.org>: - add cond_resched() to yield cpu when closing a lot of file descriptors - Al Viro <viro(a)zeniv.linux.org.uk>: - add cond_resched() to yield cpu when closing a lot of file descriptors --- arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/file.c | 63 ++++++++++++++++++--- fs/open.c | 20 +++++++ include/linux/fdtable.h | 2 + include/linux/syscalls.h | 2 + include/uapi/asm-generic/unistd.h | 4 +- 22 files changed, 100 insertions(+), 9 deletions(-) diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl index 9e7704e44f6d..b55d93af8096 100644 --- a/arch/alpha/kernel/syscalls/syscall.tbl +++ b/arch/alpha/kernel/syscalls/syscall.tbl @@ -473,3 +473,4 @@ 541 common fsconfig sys_fsconfig 542 common fsmount sys_fsmount 543 common fspick sys_fspick +545 common close_range sys_close_range diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl index aaf479a9e92d..0125c97c75dd 100644 --- a/arch/arm/tools/syscall.tbl +++ b/arch/arm/tools/syscall.tbl @@ -447,3 +447,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index c39e90600bb3..9a3270d29b42 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -886,6 +886,8 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_close_range 435 +__SYSCALL(__NR_close_range, sys_close_range) /* * Please add new compat syscalls above this comment and update diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl index e01df3f2f80d..1a90b464e96f 100644 --- a/arch/ia64/kernel/syscalls/syscall.tbl +++ b/arch/ia64/kernel/syscalls/syscall.tbl @@ -354,3 +354,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl index 7e3d0734b2f3..2dee2050f9ef 100644 --- a/arch/m68k/kernel/syscalls/syscall.tbl +++ b/arch/m68k/kernel/syscalls/syscall.tbl @@ -433,3 +433,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 26339e417695..923ef69e5a76 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -439,3 +439,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 0e2dd68ade57..967ed9de51cd 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -372,3 +372,4 @@ 431 n32 fsconfig sys_fsconfig 432 n32 fsmount sys_fsmount 433 n32 fspick sys_fspick +435 n32 close_range sys_close_range diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl index 5eebfa0d155c..71de731102b1 100644 --- a/arch/mips/kernel/syscalls/syscall_n64.tbl +++ b/arch/mips/kernel/syscalls/syscall_n64.tbl @@ -348,3 +348,4 @@ 431 n64 fsconfig sys_fsconfig 432 n64 fsmount sys_fsmount 433 n64 fspick sys_fspick +435 n64 close_range sys_close_range diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl index 3cc1374e02d0..5a325ab29f88 100644 --- a/arch/mips/kernel/syscalls/syscall_o32.tbl +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl @@ -421,3 +421,4 @@ 431 o32 fsconfig sys_fsconfig 432 o32 fsmount sys_fsmount 433 o32 fspick sys_fspick +435 o32 close_range sys_close_range diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index c9e377d59232..dcc0a0879139 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 103655d84b4b..ba2c1f078cbd 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -515,3 +515,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index e822b2964a83..d7c9043d2902 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig sys_fsconfig 432 common fsmount sys_fsmount sys_fsmount 433 common fspick sys_fspick sys_fspick +435 common close_range sys_close_range sys_close_range diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 016a727d4357..9b5e6bf0ce32 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index e047480b1605..8c674a1e0072 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -479,3 +479,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index ad968b7bac72..7f7a89a96707 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -438,3 +438,4 @@ 431 i386 fsconfig sys_fsconfig __ia32_sys_fsconfig 432 i386 fsmount sys_fsmount __ia32_sys_fsmount 433 i386 fspick sys_fspick __ia32_sys_fspick +435 i386 close_range sys_close_range __ia32_sys_close_range diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index b4e6f9e6204a..0f7d47ae921c 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -355,6 +355,7 @@ 431 common fsconfig __x64_sys_fsconfig 432 common fsmount __x64_sys_fsmount 433 common fspick __x64_sys_fspick +435 common close_range __x64_sys_close_range # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl index 5fa0ee1c8e00..b489532265d0 100644 --- a/arch/xtensa/kernel/syscalls/syscall.tbl +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -404,3 +404,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/fs/file.c b/fs/file.c index 3da91a112bab..54945efa046e 100644 --- a/fs/file.c +++ b/fs/file.c @@ -615,12 +615,9 @@ void fd_install(unsigned int fd, struct file *file) EXPORT_SYMBOL(fd_install); -/* - * The same warnings as for __alloc_fd()/__fd_install() apply here... - */ -int __close_fd(struct files_struct *files, unsigned fd) +static struct file *pick_file(struct files_struct *files, unsigned fd) { - struct file *file; + struct file *file = NULL; struct fdtable *fdt; spin_lock(&files->file_lock); @@ -632,15 +629,65 @@ int __close_fd(struct files_struct *files, unsigned fd) goto out_unlock; rcu_assign_pointer(fdt->fd[fd], NULL); __put_unused_fd(files, fd); - spin_unlock(&files->file_lock); - return filp_close(file, files); out_unlock: spin_unlock(&files->file_lock); - return -EBADF; + return file; +} + +/* + * The same warnings as for __alloc_fd()/__fd_install() apply here... + */ +int __close_fd(struct files_struct *files, unsigned fd) +{ + struct file *file; + + file = pick_file(files, fd); + if (!file) + return -EBADF; + + return filp_close(file, files); } EXPORT_SYMBOL(__close_fd); /* for ksys_close() */ +/** + * __close_range() - Close all file descriptors in a given range. + * + * @fd: starting file descriptor to close + * @max_fd: last file descriptor to close + * + * This closes a range of file descriptors. All file descriptors + * from @fd up to and including @max_fd are closed. + */ +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) +{ + unsigned int cur_max; + + if (fd > max_fd) + return -EINVAL; + + rcu_read_lock(); + cur_max = files_fdtable(files)->max_fds; + rcu_read_unlock(); + + /* cap to last valid index into fdtable */ + if (max_fd >= cur_max) + max_fd = cur_max - 1; + + while (fd <= max_fd) { + struct file *file; + + file = pick_file(files, fd++); + if (!file) + continue; + + filp_close(file, files); + cond_resched(); + } + + return 0; +} + /* * variant of __close_fd that gets a ref on the file for later fput */ diff --git a/fs/open.c b/fs/open.c index 9c7d724a6f67..c7baaee7aa47 100644 --- a/fs/open.c +++ b/fs/open.c @@ -1174,6 +1174,26 @@ SYSCALL_DEFINE1(close, unsigned int, fd) return retval; } +/** + * close_range() - Close all file descriptors in a given range. + * + * @fd: starting file descriptor to close + * @max_fd: last file descriptor to close + * @flags: reserved for future extensions + * + * This closes a range of file descriptors. All file descriptors + * from @fd up to and including @max_fd are closed. + * Currently, errors to close a given file descriptor are ignored. + */ +SYSCALL_DEFINE3(close_range, unsigned int, fd, unsigned int, max_fd, + unsigned int, flags) +{ + if (flags) + return -EINVAL; + + return __close_range(current->files, fd, max_fd); +} + /* * This routine simulates a hangup on the tty, to arrange that users * are given clean terminals at login time. diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h index f07c55ea0c22..fcd07181a365 100644 --- a/include/linux/fdtable.h +++ b/include/linux/fdtable.h @@ -121,6 +121,8 @@ extern void __fd_install(struct files_struct *files, unsigned int fd, struct file *file); extern int __close_fd(struct files_struct *files, unsigned int fd); +extern int __close_range(struct files_struct *files, unsigned int fd, + unsigned int max_fd); extern int __close_fd_get_file(unsigned int fd, struct file **res); extern struct kmem_cache *files_cachep; diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e2870fe1be5b..c0189e223255 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -441,6 +441,8 @@ asmlinkage long sys_fchown(unsigned int fd, uid_t user, gid_t group); asmlinkage long sys_openat(int dfd, const char __user *filename, int flags, umode_t mode); asmlinkage long sys_close(unsigned int fd); +asmlinkage long sys_close_range(unsigned int fd, unsigned int max_fd, + unsigned int flags); asmlinkage long sys_vhangup(void); /* fs/pipe.c */ diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index a87904daf103..3f36c8745d24 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -844,9 +844,11 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_close_range 435 +__SYSCALL(__NR_close_range, sys_close_range) #undef __NR_syscalls -#define __NR_syscalls 434 +#define __NR_syscalls 436 /* * 32 bit systems traditionally used different -- 2.21.0

6 years, 6 months

6
14
0 0

[PATCH selftests 0/2] Add checkbashisms meta-testcase

by Masami Hiramatsu

Hi, Here are patches for making sure the ftracetest testcases are checkbashisms clean. This actually needs a patch from Juerg, "selftests/ftrace: Make the coloring POSIX compliant" to complete the work. http://lkml.kernel.org/r/20190220161333.28109-1-juergh@canonical.com (Note that this is still under development) So as Juerg pointed, recently ftracetest becomes not POSIX compliant, and such kind of issues happened repeatedly. To avoid those anymore, I decided to introduce a testcase which runs checkbasisms on ftracetest and its testcases. I think this can help us to find out whether it was written in a way out of POSIX. Thank you, --- Masami Hiramatsu (2): selftests/ftrace: Make a script checkbashisms clean selftests/ftrace: Add checkbashisms meta-testcase tools/testing/selftests/ftrace/ftracetest | 1 + .../ftrace/test.d/kprobe/kprobe_ftrace.tc | 2 +- .../selftests/ftrace/test.d/selftest/bashisms.tc | 21 ++++++++++++++++++++ 3 files changed, 23 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/ftrace/test.d/selftest/bashisms.tc -- Masami Hiramatsu (Linaro) <mhiramat(a)kernel.org>

6 years, 6 months

3
5
0 0

[PATCH] selftests: add missing include linux/sockios

by Alakesh Haloi

Including <linux/sockios.h> fixes the following compiler warning timestamping.c: In function ‘printpacket’: timestamping.c:261:19: error: ‘SIOCGSTAMP’ undeclared (first use in this function); did you mean ‘SIOCGSTAMPNS’? if (ioctl(sock, SIOCGSTAMP, &tv)) ^~~~~~~~~~ SIOCGSTAMPNS Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> --- tools/testing/selftests/networking/timestamping/timestamping.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/networking/timestamping/timestamping.c b/tools/testing/selftests/networking/timestamping/timestamping.c index 5cdfd743447b..62f03bcc9432 100644 --- a/tools/testing/selftests/networking/timestamping/timestamping.c +++ b/tools/testing/selftests/networking/timestamping/timestamping.c @@ -44,6 +44,7 @@ #include <asm/types.h> #include <linux/net_tstamp.h> #include <linux/errqueue.h> +#include <linux/sockios.h> #ifndef SO_TIMESTAMPING # define SO_TIMESTAMPING 37 -- 2.17.1

6 years, 6 months

1
0
0 0

[PATCH] selftests: kselftest: fix function return type

by Alakesh Haloi

ksft_test_num function returns sum of unsigned ints and hence should return unsigned int. This fixes the following compiler warning In file included from sync_test.c:37:0: ../kselftest.h: In function ‘ksft_print_cnts’: ../kselftest.h:73:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ksft_plan != ksft_test_num()) ^~ Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> --- tools/testing/selftests/kselftest.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h index ec15c4f6af55..5a98c80e079e 100644 --- a/tools/testing/selftests/kselftest.h +++ b/tools/testing/selftests/kselftest.h @@ -35,7 +35,7 @@ struct ksft_count { static struct ksft_count ksft_cnt; static unsigned int ksft_plan; -static inline int ksft_test_num(void) +static inline unsigned int ksft_test_num(void) { return ksft_cnt.ksft_pass + ksft_cnt.ksft_fail + ksft_cnt.ksft_xfail + ksft_cnt.ksft_xpass + -- 2.17.1

6 years, 6 months

1
0
0 0

[PATCH 0/2] kselftest: fix rtctest timeout

by Alexandre Belloni

Hi, Commit a745f7af3cbd ("selftests/harness: Add 30 second timeout per test") wrongly assumed that no individual test would run for more than 30 seconds and this silently broke rtctest. Please consider the following patches as fixes for v5.2 to avoid having any non working release. Thanks, Alexandre Belloni (2): selftests/harness: Allow test to configure timeout selftests: rtc: rtctest: specify timeouts tools/testing/selftests/kselftest_harness.h | 17 ++++++++++++----- tools/testing/selftests/rtc/rtctest.c | 6 +++--- 2 files changed, 15 insertions(+), 8 deletions(-) -- 2.21.0

6 years, 6 months

3
6
0 0

[PATCH 5.1 075/122] ftrace/x86_64: Emulate call function while updating in breakpoint handler

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 9e298e8604088a600d8100a111a532a9d342af09 upstream. Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -231,6 +232,7 @@ int ftrace_modify_call(struct dyn_ftrace } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -259,6 +261,8 @@ int ftrace_update_ftrace_func(ftrace_fun unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -294,13 +298,28 @@ int ftrace_int3_handler(struct pt_regs * if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } NOKPROBE_SYMBOL(ftrace_int3_handler); @@ -859,6 +878,8 @@ void arch_ftrace_update_trampoline(struc func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -960,6 +981,7 @@ static int ftrace_mod_jmp(unsigned long { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new);

6 years, 6 months

1
0
0 0

[PATCH 5.1 074/122] x86_64: Allow breakpoints to emulate call instructions

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 4b33dadf37666c0860b88f9e52a16d07bf6d0b03 upstream. In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/include/asm/text-patching.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_r extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */

6 years, 6 months

1
0
0 0

[PATCH 5.0 066/139] ftrace/x86_64: Emulate call function while updating in breakpoint handler

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 9e298e8604088a600d8100a111a532a9d342af09 upstream. Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -231,6 +232,7 @@ int ftrace_modify_call(struct dyn_ftrace } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -259,6 +261,8 @@ int ftrace_update_ftrace_func(ftrace_fun unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -294,13 +298,28 @@ int ftrace_int3_handler(struct pt_regs * if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } static int ftrace_write(unsigned long ip, const char *val, int size) @@ -858,6 +877,8 @@ void arch_ftrace_update_trampoline(struc func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -959,6 +980,7 @@ static int ftrace_mod_jmp(unsigned long { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new);

6 years, 6 months

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[PATCH 5.0 065/139] x86_64: Allow breakpoints to emulate call instructions

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 4b33dadf37666c0860b88f9e52a16d07bf6d0b03 upstream. In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/include/asm/text-patching.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_r extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */

6 years, 6 months

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[PATCH 4.19 053/114] ftrace/x86_64: Emulate call function while updating in breakpoint handler

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 9e298e8604088a600d8100a111a532a9d342af09 upstream. Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -228,6 +229,7 @@ int ftrace_modify_call(struct dyn_ftrace } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -256,6 +258,8 @@ int ftrace_update_ftrace_func(ftrace_fun unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -291,13 +295,28 @@ int ftrace_int3_handler(struct pt_regs * if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } static int ftrace_write(unsigned long ip, const char *val, int size) @@ -868,6 +887,8 @@ void arch_ftrace_update_trampoline(struc func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -964,6 +985,7 @@ static int ftrace_mod_jmp(unsigned long { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new);

6 years, 6 months

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[PATCH 4.14 34/77] ftrace/x86_64: Emulate call function while updating in breakpoint handler

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 9e298e8604088a600d8100a111a532a9d342af09 upstream. Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -30,6 +30,7 @@ #include <asm/sections.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -229,6 +230,7 @@ int ftrace_modify_call(struct dyn_ftrace } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -257,6 +259,8 @@ int ftrace_update_ftrace_func(ftrace_fun unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -292,13 +296,28 @@ int ftrace_int3_handler(struct pt_regs * if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } static int ftrace_write(unsigned long ip, const char *val, int size) @@ -869,6 +888,8 @@ void arch_ftrace_update_trampoline(struc func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -965,6 +986,7 @@ static int ftrace_mod_jmp(unsigned long { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new);

6 years, 6 months

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[PATCH 4.14 33/77] x86_64: Allow breakpoints to emulate call instructions

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 4b33dadf37666c0860b88f9e52a16d07bf6d0b03 upstream. In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/include/asm/text-patching.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -38,4 +38,32 @@ extern void *text_poke(void *addr, const extern int poke_int3_handler(struct pt_regs *regs); extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */

6 years, 6 months

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[PATCH 4.19 052/114] x86_64: Allow breakpoints to emulate call instructions

by Greg Kroah-Hartman

From: Peter Zijlstra <peterz(a)infradead.org> commit 4b33dadf37666c0860b88f9e52a16d07bf6d0b03 upstream. In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/include/asm/text-patching.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_r extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */

6 years, 6 months

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[PATCH bpf v1 0/3] Test the 32bit narrow reads

by Krzesimir Nowak

These patches try to test the fix made in commit e2f7fc0ac695 ("bpf: fix undefined behavior in narrow load handling"). The problem existed in the generated BPF bytecode that was doing a 32bit narrow read of a 64bit field, so to test it the code would need to be executed. Currently the only such field exists in BPF_PROG_TYPE_PERF_EVENT, which is not supported by bpf_prog_test_run(). First commit adds the test, but since I can't run it, I'm not sure if it is even valid (because endianness, for example). Second commit adds a message to test_verifier when it couldn't run the program because of lack permissions or program type being not supported. Third commit fixes a possible problem with errno. With these patches, I get the following output on my test: /kernel/tools/testing/selftests/bpf$ sudo ./test_verifier 920 920 #920/p 32bit loads of a 64bit field (both least and most significant words) Did not run the program (not supported) OK Summary: 1 PASSED, 0 SKIPPED, 0 FAILED So it looks like I need to pick a different approach. Krzesimir Nowak (3): selftests/bpf: Test correctness of narrow 32bit read on 64bit field selftests/bpf: Print a message when tester could not run a program selftests/bpf: Avoid a clobbering of errno tools/testing/selftests/bpf/test_verifier.c | 19 +++++++++++++++---- .../testing/selftests/bpf/verifier/var_off.c | 15 +++++++++++++++ 2 files changed, 30 insertions(+), 4 deletions(-) -- 2.20.1

6 years, 6 months

3
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[RFC PATCH 0/4] KVM selftests for s390x

by Thomas Huth

This patch series enables the KVM selftests for s390x. As a first test, the sync_regs from x86 has been adapted to s390x. Please note that the ucall() interface is not used yet - since s390x neither has PIO nor MMIO, this needs some more work first before it becomes usable (we likely should use a DIAG hypercall here, which is what the sync_reg test is currently using, too...). Thomas Huth (4): KVM: selftests: Guard struct kvm_vcpu_events with __KVM_HAVE_VCPU_EVENTS KVM: selftests: Align memory region addresses to 1M on s390x KVM: selftests: Add processor code for s390x KVM: selftests: Add the sync_regs test for s390x MAINTAINERS | 2 + tools/testing/selftests/kvm/Makefile | 3 + .../testing/selftests/kvm/include/kvm_util.h | 2 + .../selftests/kvm/include/s390x/processor.h | 22 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 24 +- .../selftests/kvm/lib/s390x/processor.c | 277 ++++++++++++++++++ .../selftests/kvm/s390x/sync_regs_test.c | 151 ++++++++++ 7 files changed, 476 insertions(+), 5 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/s390x/processor.h create mode 100644 tools/testing/selftests/kvm/lib/s390x/processor.c create mode 100644 tools/testing/selftests/kvm/s390x/sync_regs_test.c -- 2.21.0

6 years, 6 months

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FAILED: patch "[PATCH] ftrace/x86_64: Emulate call function while updating in" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 9e298e8604088a600d8100a111a532a9d342af09 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra <peterz(a)infradead.org> Date: Wed, 1 May 2019 15:11:17 +0200 Subject: [PATCH] ftrace/x86_64: Emulate call function while updating in breakpoint handler Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index ef49517f6bb2..bd553b3af22e 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -231,6 +232,7 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr, } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -259,6 +261,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func) unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -294,13 +298,28 @@ int ftrace_int3_handler(struct pt_regs *regs) if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } NOKPROBE_SYMBOL(ftrace_int3_handler); @@ -859,6 +878,8 @@ void arch_ftrace_update_trampoline(struct ftrace_ops *ops) func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -960,6 +981,7 @@ static int ftrace_mod_jmp(unsigned long ip, void *func) { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new);

6 years, 6 months

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FAILED: patch "[PATCH] ftrace/x86_64: Emulate call function while updating in" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 9e298e8604088a600d8100a111a532a9d342af09 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra <peterz(a)infradead.org> Date: Wed, 1 May 2019 15:11:17 +0200 Subject: [PATCH] ftrace/x86_64: Emulate call function while updating in breakpoint handler Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index ef49517f6bb2..bd553b3af22e 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -231,6 +232,7 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr, } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -259,6 +261,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func) unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -294,13 +298,28 @@ int ftrace_int3_handler(struct pt_regs *regs) if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } NOKPROBE_SYMBOL(ftrace_int3_handler); @@ -859,6 +878,8 @@ void arch_ftrace_update_trampoline(struct ftrace_ops *ops) func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -960,6 +981,7 @@ static int ftrace_mod_jmp(unsigned long ip, void *func) { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new);

6 years, 6 months

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FAILED: patch "[PATCH] x86_64: Allow breakpoints to emulate call instructions" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 4b33dadf37666c0860b88f9e52a16d07bf6d0b03 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra <peterz(a)infradead.org> Date: Wed, 1 May 2019 15:11:17 +0200 Subject: [PATCH] x86_64: Allow breakpoints to emulate call instructions In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> diff --git a/arch/x86/include/asm/text-patching.h b/arch/x86/include/asm/text-patching.h index e85ff65c43c3..05861cc08787 100644 --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_regs *regs); extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */

6 years, 6 months

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FAILED: patch "[PATCH] x86_64: Allow breakpoints to emulate call instructions" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 4b33dadf37666c0860b88f9e52a16d07bf6d0b03 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra <peterz(a)infradead.org> Date: Wed, 1 May 2019 15:11:17 +0200 Subject: [PATCH] x86_64: Allow breakpoints to emulate call instructions In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> diff --git a/arch/x86/include/asm/text-patching.h b/arch/x86/include/asm/text-patching.h index e85ff65c43c3..05861cc08787 100644 --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_regs *regs); extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */

6 years, 6 months

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[PATCH v2] KVM: selftests: Compile code with warnings enabled

by Thomas Huth

So far the KVM selftests are compiled without any compiler warnings enabled. That's quite bad, since we miss a lot of possible bugs this way. Let's enable at least "-Wall" and some other useful warning flags now, and fix at least the trivial problems in the code (like unused variables). Signed-off-by: Thomas Huth <thuth(a)redhat.com> --- v2: - Rebased to kvm/queue - Fix warnings in state_test.c and evmcs_test.c, too tools/testing/selftests/kvm/Makefile | 4 +++- tools/testing/selftests/kvm/dirty_log_test.c | 6 +++++- tools/testing/selftests/kvm/lib/kvm_util.c | 3 --- tools/testing/selftests/kvm/lib/x86_64/processor.c | 4 +--- tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c | 1 + tools/testing/selftests/kvm/x86_64/evmcs_test.c | 7 +------ tools/testing/selftests/kvm/x86_64/platform_info_test.c | 1 - tools/testing/selftests/kvm/x86_64/smm_test.c | 3 +-- tools/testing/selftests/kvm/x86_64/state_test.c | 7 +------ .../selftests/kvm/x86_64/vmx_close_while_nested_test.c | 5 +---- tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c | 5 ++--- 11 files changed, 16 insertions(+), 30 deletions(-) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 79c524395ebe..d113eaf2d570 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -34,7 +34,9 @@ LIBKVM += $(LIBKVM_$(UNAME_M)) INSTALL_HDR_PATH = $(top_srcdir)/usr LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/ LINUX_TOOL_INCLUDE = $(top_srcdir)/tools/include -CFLAGS += -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude -I$(<D) -Iinclude/$(UNAME_M) -I.. +CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \ + -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \ + -I$(LINUX_HDR_PATH) -Iinclude -I$(<D) -Iinclude/$(UNAME_M) -I.. no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \ $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie) diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index a29d1119ccb3..ff20950aee05 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -131,6 +131,7 @@ static void *vcpu_worker(void *data) while (!READ_ONCE(host_quit)) { /* Let the guest dirty the random pages */ ret = _vcpu_run(vm, VCPU_ID); + TEST_ASSERT(ret == 0, "vcpu_run failed: %d\n", ret); if (get_ucall(vm, VCPU_ID, &uc) == UCALL_SYNC) { pages_count += TEST_PAGES_PER_LOOP; generate_random_array(guest_array, TEST_PAGES_PER_LOOP); @@ -423,8 +424,11 @@ int main(int argc, char *argv[]) unsigned long interval = TEST_HOST_LOOP_INTERVAL; bool mode_selected = false; uint64_t phys_offset = 0; - unsigned int mode, host_ipa_limit; + unsigned int mode; int opt, i; +#ifdef __aarch64__ + unsigned int host_ipa_limit; +#endif #ifdef USE_CLEAR_DIRTY_LOG if (!kvm_check_cap(KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2)) { diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index e9113857f44e..cf62de377310 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -135,7 +135,6 @@ struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm, unsigned long type) { struct kvm_vm *vm; - int kvm_fd; vm = calloc(1, sizeof(*vm)); TEST_ASSERT(vm != NULL, "Insufficient Memory"); @@ -556,7 +555,6 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm, uint32_t flags) { int ret; - unsigned long pmem_size = 0; struct userspace_mem_region *region; size_t huge_page_size = KVM_UTIL_PGS_PER_HUGEPG * vm->page_size; @@ -1334,7 +1332,6 @@ void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_sregs *sregs) int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_sregs *sregs) { struct vcpu *vcpu = vcpu_find(vm, vcpuid); - int ret; TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index dc7fae9fa424..21f3040d90cb 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -229,8 +229,6 @@ void sregs_dump(FILE *stream, struct kvm_sregs *sregs, void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot) { - int rc; - TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use " "unknown or unsupported guest mode, mode: 0x%x", vm->mode); @@ -549,7 +547,6 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) struct pageDirectoryPointerEntry *pdpe; struct pageDirectoryEntry *pde; struct pageTableEntry *pte; - void *hva; TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use " "unknown or unsupported guest mode, mode: 0x%x", vm->mode); @@ -582,6 +579,7 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) unmapped_gva: TEST_ASSERT(false, "No mapping for vm virtual address, " "gva: 0x%lx", gva); + exit(EXIT_FAILURE); } static void kvm_setup_gdt(struct kvm_vm *vm, struct kvm_dtable *dt, int gdt_memslot, diff --git a/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c b/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c index 7c2c4d4055a8..63cc9c3f5ab6 100644 --- a/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c +++ b/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c @@ -87,6 +87,7 @@ int main(int argc, char *argv[]) while (1) { rc = _vcpu_run(vm, VCPU_ID); + TEST_ASSERT(rc == 0, "vcpu_run failed: %d\n", rc); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "Unexpected exit reason: %u (%s),\n", run->exit_reason, diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c index 36669684eca5..b38260e29775 100644 --- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c +++ b/tools/testing/selftests/kvm/x86_64/evmcs_test.c @@ -19,8 +19,6 @@ #define VCPU_ID 5 -static bool have_nested_state; - void l2_guest_code(void) { GUEST_SYNC(6); @@ -73,7 +71,6 @@ void guest_code(struct vmx_pages *vmx_pages) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages = NULL; vm_vaddr_t vmx_pages_gva = 0; struct kvm_regs regs1, regs2; @@ -88,8 +85,6 @@ int main(int argc, char *argv[]) .args[0] = (unsigned long)&evmcs_ver }; - struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); - /* Create VM */ vm = vm_create_default(VCPU_ID, 0, guest_code); @@ -113,7 +108,7 @@ int main(int argc, char *argv[]) vcpu_regs_get(vm, VCPU_ID, &regs1); - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); for (stage = 1;; stage++) { diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c index eb3e7a838cb4..40050e44ec0a 100644 --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c @@ -81,7 +81,6 @@ static void test_msr_platform_info_disabled(struct kvm_vm *vm) int main(int argc, char *argv[]) { struct kvm_vm *vm; - struct kvm_run *state; int rv; uint64_t msr_platform_info; diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c index fb8086964d83..4daf520bada1 100644 --- a/tools/testing/selftests/kvm/x86_64/smm_test.c +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c @@ -87,7 +87,6 @@ void guest_code(struct vmx_pages *vmx_pages) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages = NULL; vm_vaddr_t vmx_pages_gva = 0; struct kvm_regs regs; @@ -115,7 +114,7 @@ int main(int argc, char *argv[]) vcpu_set_msr(vm, VCPU_ID, MSR_IA32_SMBASE, SMRAM_GPA); if (kvm_check_cap(KVM_CAP_NESTED_STATE)) { - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); } else { printf("will skip SMM test with VMX enabled\n"); diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c index e0a3c0204b7c..2a4121f4de01 100644 --- a/tools/testing/selftests/kvm/x86_64/state_test.c +++ b/tools/testing/selftests/kvm/x86_64/state_test.c @@ -22,8 +22,6 @@ #define VCPU_ID 5 -static bool have_nested_state; - void l2_guest_code(void) { GUEST_SYNC(6); @@ -122,7 +120,6 @@ void guest_code(struct vmx_pages *vmx_pages) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages = NULL; vm_vaddr_t vmx_pages_gva = 0; struct kvm_regs regs1, regs2; @@ -132,8 +129,6 @@ int main(int argc, char *argv[]) struct ucall uc; int stage; - struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); - /* Create VM */ vm = vm_create_default(VCPU_ID, 0, guest_code); vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); @@ -142,7 +137,7 @@ int main(int argc, char *argv[]) vcpu_regs_get(vm, VCPU_ID, &regs1); if (kvm_check_cap(KVM_CAP_NESTED_STATE)) { - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); } else { printf("will skip nested state checks\n"); diff --git a/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c b/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c index 6edec6fd790b..97182b47b10c 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c @@ -39,8 +39,6 @@ static void l1_guest_code(struct vmx_pages *vmx_pages) { #define L2_GUEST_STACK_SIZE 64 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; - uint32_t control; - uintptr_t save_cr3; GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages)); GUEST_ASSERT(load_vmcs(vmx_pages)); @@ -55,7 +53,6 @@ static void l1_guest_code(struct vmx_pages *vmx_pages) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages; vm_vaddr_t vmx_pages_gva; struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); @@ -68,7 +65,7 @@ int main(int argc, char *argv[]) vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); /* Allocate VMX pages and shared descriptors (vmx_pages). */ - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); for (;;) { diff --git a/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c b/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c index 18fa64db0d7a..6d37a3173956 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c @@ -121,7 +121,7 @@ static void l1_guest_code(struct vmx_pages *vmx_pages) GUEST_DONE(); } -void report(int64_t val) +static void report(int64_t val) { printf("IA32_TSC_ADJUST is %ld (%lld * TSC_ADJUST_VALUE + %lld).\n", val, val / TSC_ADJUST_VALUE, val % TSC_ADJUST_VALUE); @@ -129,7 +129,6 @@ void report(int64_t val) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages; vm_vaddr_t vmx_pages_gva; struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); @@ -142,7 +141,7 @@ int main(int argc, char *argv[]) vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); /* Allocate VMX pages and shared descriptors (vmx_pages). */ - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); for (;;) { -- 2.21.0

6 years, 6 months

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[PATCH v2 00/17] kunit: introduce KUnit, the Linux kernel unit testing framework

by Brendan Higgins

## TLDR I rebased the last patchset on 5.1-rc7 in hopes that we can get this in 5.2. Shuah, I think you, Greg KH, and myself talked off thread, and we agreed we would merge through your tree when the time came? Am I remembering correctly? ## Background This patch set proposes KUnit, a lightweight unit testing and mocking framework for the Linux kernel. Unlike Autotest and kselftest, KUnit is a true unit testing framework; it does not require installing the kernel on a test machine or in a VM and does not require tests to be written in userspace running on a host kernel. Additionally, KUnit is fast: From invocation to completion KUnit can run several dozen tests in under a second. Currently, the entire KUnit test suite for KUnit runs in under a second from the initial invocation (build time excluded). KUnit is heavily inspired by JUnit, Python's unittest.mock, and Googletest/Googlemock for C++. KUnit provides facilities for defining unit test cases, grouping related test cases into test suites, providing common infrastructure for running tests, mocking, spying, and much more. ## What's so special about unit testing? A unit test is supposed to test a single unit of code in isolation, hence the name. There should be no dependencies outside the control of the test; this means no external dependencies, which makes tests orders of magnitudes faster. Likewise, since there are no external dependencies, there are no hoops to jump through to run the tests. Additionally, this makes unit tests deterministic: a failing unit test always indicates a problem. Finally, because unit tests necessarily have finer granularity, they are able to test all code paths easily solving the classic problem of difficulty in exercising error handling code. ## Is KUnit trying to replace other testing frameworks for the kernel? No. Most existing tests for the Linux kernel are end-to-end tests, which have their place. A well tested system has lots of unit tests, a reasonable number of integration tests, and some end-to-end tests. KUnit is just trying to address the unit test space which is currently not being addressed. ## More information on KUnit There is a bunch of documentation near the end of this patch set that describes how to use KUnit and best practices for writing unit tests. For convenience I am hosting the compiled docs here: https://google.github.io/kunit-docs/third_party/kernel/docs/ Additionally for convenience, I have applied these patches to a branch: https://kunit.googlesource.com/linux/+/kunit/rfc/v5.1-rc7/v1 The repo may be cloned with: git clone https://kunit.googlesource.com/linux This patchset is on the kunit/rfc/v5.1-rc7/v1 branch. ## Changes Since Last Version None. I just rebased the last patchset on v5.1-rc7. -- 2.21.0.593.g511ec345e18-goog

6 years, 6 months

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[PATCH AUTOSEL 4.19 009/244] selftests/bpf: set RLIMIT_MEMLOCK properly for test_libbpf_open.c

by Sasha Levin

From: Yonghong Song <yhs(a)fb.com> [ Upstream commit 6cea33701eb024bc6c920ab83940ee22afd29139 ] Test test_libbpf.sh failed on my development server with failure -bash-4.4$ sudo ./test_libbpf.sh [0] libbpf: Error in bpf_object__probe_name():Operation not permitted(1). Couldn't load basic 'r0 = 0' BPF program. test_libbpf: failed at file test_l4lb.o selftests: test_libbpf [FAILED] -bash-4.4$ The reason is because my machine has 64KB locked memory by default which is not enough for this program to get locked memory. Similar to other bpf selftests, let us increase RLIMIT_MEMLOCK to infinity, which fixed the issue. Signed-off-by: Yonghong Song <yhs(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/test_libbpf_open.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/bpf/test_libbpf_open.c b/tools/testing/selftests/bpf/test_libbpf_open.c index 8fcd1c076add0..cbd55f5f8d598 100644 --- a/tools/testing/selftests/bpf/test_libbpf_open.c +++ b/tools/testing/selftests/bpf/test_libbpf_open.c @@ -11,6 +11,8 @@ static const char *__doc__ = #include <bpf/libbpf.h> #include <getopt.h> +#include "bpf_rlimit.h" + static const struct option long_options[] = { {"help", no_argument, NULL, 'h' }, {"debug", no_argument, NULL, 'D' }, -- 2.20.1

6 years, 6 months

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[PATCH AUTOSEL 5.0 011/317] selftests/bpf: set RLIMIT_MEMLOCK properly for test_libbpf_open.c

by Sasha Levin

From: Yonghong Song <yhs(a)fb.com> [ Upstream commit 6cea33701eb024bc6c920ab83940ee22afd29139 ] Test test_libbpf.sh failed on my development server with failure -bash-4.4$ sudo ./test_libbpf.sh [0] libbpf: Error in bpf_object__probe_name():Operation not permitted(1). Couldn't load basic 'r0 = 0' BPF program. test_libbpf: failed at file test_l4lb.o selftests: test_libbpf [FAILED] -bash-4.4$ The reason is because my machine has 64KB locked memory by default which is not enough for this program to get locked memory. Similar to other bpf selftests, let us increase RLIMIT_MEMLOCK to infinity, which fixed the issue. Signed-off-by: Yonghong Song <yhs(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/test_libbpf_open.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/bpf/test_libbpf_open.c b/tools/testing/selftests/bpf/test_libbpf_open.c index 8fcd1c076add0..cbd55f5f8d598 100644 --- a/tools/testing/selftests/bpf/test_libbpf_open.c +++ b/tools/testing/selftests/bpf/test_libbpf_open.c @@ -11,6 +11,8 @@ static const char *__doc__ = #include <bpf/libbpf.h> #include <getopt.h> +#include "bpf_rlimit.h" + static const struct option long_options[] = { {"help", no_argument, NULL, 'h' }, {"debug", no_argument, NULL, 'D' }, -- 2.20.1

6 years, 6 months

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[PATCH AUTOSEL 5.1 015/375] selftests/bpf: set RLIMIT_MEMLOCK properly for test_libbpf_open.c

by Sasha Levin

From: Yonghong Song <yhs(a)fb.com> [ Upstream commit 6cea33701eb024bc6c920ab83940ee22afd29139 ] Test test_libbpf.sh failed on my development server with failure -bash-4.4$ sudo ./test_libbpf.sh [0] libbpf: Error in bpf_object__probe_name():Operation not permitted(1). Couldn't load basic 'r0 = 0' BPF program. test_libbpf: failed at file test_l4lb.o selftests: test_libbpf [FAILED] -bash-4.4$ The reason is because my machine has 64KB locked memory by default which is not enough for this program to get locked memory. Similar to other bpf selftests, let us increase RLIMIT_MEMLOCK to infinity, which fixed the issue. Signed-off-by: Yonghong Song <yhs(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/test_libbpf_open.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/bpf/test_libbpf_open.c b/tools/testing/selftests/bpf/test_libbpf_open.c index 65cbd30704b5a..9e9db202d218a 100644 --- a/tools/testing/selftests/bpf/test_libbpf_open.c +++ b/tools/testing/selftests/bpf/test_libbpf_open.c @@ -11,6 +11,8 @@ static const char *__doc__ = #include <bpf/libbpf.h> #include <getopt.h> +#include "bpf_rlimit.h" + static const struct option long_options[] = { {"help", no_argument, NULL, 'h' }, {"debug", no_argument, NULL, 'D' }, -- 2.20.1

6 years, 6 months

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[PATCH v3 0/3] Fix vDSO clock_getres()

by Vincenzo Frascino

clock_getres in the vDSO library has to preserve the same behaviour of posix_get_hrtimer_res(). In particular, posix_get_hrtimer_res() does: sec = 0; ns = hrtimer_resolution; and hrtimer_resolution depends on the enablement of the high resolution timers that can happen either at compile or at run time. A possible fix is to change the vdso implementation of clock_getres, keeping a copy of hrtimer_resolution in vdso data and using that directly [1]. This patchset implements the proposed fix for arm64, powerpc, s390, nds32 and adds a test to verify that the syscall and the vdso library implementation of clock_getres return the same values. Even if these patches are unified by the same topic, there is no dependency between them, hence they can be merged singularly by each arch maintainer. Note: arm64 and nds32 respective fixes have been merged in 5.2-rc1, hence they have been removed from this series. [1] https://marc.info/?l=linux-arm-kernel&m=155110381930196&w=2 Changes: -------- v3: - Rebased on 5.2-rc1. - Addressed review comments. v2: - Rebased on 5.1-rc5. - Addressed review comments. Cc: Christophe Leroy <christophe.leroy(a)c-s.fr> Cc: Benjamin Herrenschmidt <benh(a)kernel.crashing.org> Cc: Paul Mackerras <paulus(a)samba.org> Cc: Michael Ellerman <mpe(a)ellerman.id.au> Cc: Martin Schwidefsky <schwidefsky(a)de.ibm.com> Cc: Heiko Carstens <heiko.carstens(a)de.ibm.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Vincenzo Frascino (3): powerpc: Fix vDSO clock_getres() s390: Fix vDSO clock_getres() kselftest: Extend vDSO selftest to clock_getres arch/powerpc/include/asm/vdso_datapage.h | 2 + arch/powerpc/kernel/asm-offsets.c | 2 +- arch/powerpc/kernel/time.c | 1 + arch/powerpc/kernel/vdso32/gettimeofday.S | 7 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 7 +- arch/s390/include/asm/vdso.h | 1 + arch/s390/kernel/asm-offsets.c | 2 +- arch/s390/kernel/time.c | 1 + arch/s390/kernel/vdso32/clock_getres.S | 12 +- arch/s390/kernel/vdso64/clock_getres.S | 10 +- tools/testing/selftests/vDSO/Makefile | 2 + .../selftests/vDSO/vdso_clock_getres.c | 137 ++++++++++++++++++ 12 files changed, 168 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/vDSO/vdso_clock_getres.c -- 2.21.0

6 years, 6 months

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[PATCH v2] selftests: netfilter: missing error check when setting up veth interface

by Jeffrin Jose T

A test for the basic NAT functionality uses ip command which needs veth device.There is a condition where the kernel support for veth is not compiled into the kernel and the test script breaks.This patch contains code for reasonable error display and correct code exit. Signed-off-by: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in> --- tools/testing/selftests/netfilter/nft_nat.sh | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index 8ec76681605c..f25f72a75cf3 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -23,7 +23,11 @@ ip netns add ns0 ip netns add ns1 ip netns add ns2 -ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 +ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: No virtual ethernet pair device support in kernel" + exit $ksft_skip +fi ip link add veth1 netns ns0 type veth peer name eth0 netns ns2 ip -net ns0 link set lo up -- 2.20.1

6 years, 6 months

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[PATCH v2 0/5] Fix vDSO clock_getres()

by Vincenzo Frascino

clock_getres in the vDSO library has to preserve the same behaviour of posix_get_hrtimer_res(). In particular, posix_get_hrtimer_res() does: sec = 0; ns = hrtimer_resolution; and hrtimer_resolution depends on the enablement of the high resolution timers that can happen either at compile or at run time. A possible fix is to change the vdso implementation of clock_getres, keeping a copy of hrtimer_resolution in vdso data and using that directly [1]. This patchset implements the proposed fix for arm64, powerpc, s390, nds32 and adds a test to verify that the syscall and the vdso library implementation of clock_getres return the same values. Even if these patches are unified by the same topic, there is no dependency between them, hence they can be merged singularly by each arch maintainer. [1] https://marc.info/?l=linux-arm-kernel&m=155110381930196&w=2 Changes: -------- v2: - Rebased on 5.1-rc5. - Addressed review comments. Cc: Catalin Marinas <catalin.marinas(a)arm.com> Cc: Will Deacon <will.deacon(a)arm.com> Cc: Benjamin Herrenschmidt <benh(a)kernel.crashing.org> Cc: Paul Mackerras <paulus(a)samba.org> Cc: Michael Ellerman <mpe(a)ellerman.id.au> Cc: Martin Schwidefsky <schwidefsky(a)de.ibm.com> Cc: Heiko Carstens <heiko.carstens(a)de.ibm.com> Cc: Greentime Hu <green.hu(a)gmail.com> Cc: Vincent Chen <deanbo422(a)gmail.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Vincenzo Frascino (5): arm64: Fix vDSO clock_getres() powerpc: Fix vDSO clock_getres() s390: Fix vDSO clock_getres() nds32: Fix vDSO clock_getres() kselftest: Extend vDSO selftest to clock_getres arch/arm64/include/asm/vdso_datapage.h | 1 + arch/arm64/kernel/asm-offsets.c | 2 +- arch/arm64/kernel/vdso.c | 2 + arch/arm64/kernel/vdso/gettimeofday.S | 22 ++-- arch/nds32/include/asm/vdso_datapage.h | 1 + arch/nds32/kernel/vdso.c | 1 + arch/nds32/kernel/vdso/gettimeofday.c | 4 +- arch/powerpc/include/asm/vdso_datapage.h | 2 + arch/powerpc/kernel/asm-offsets.c | 2 +- arch/powerpc/kernel/time.c | 1 + arch/powerpc/kernel/vdso32/gettimeofday.S | 7 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 7 +- arch/s390/include/asm/vdso.h | 1 + arch/s390/kernel/asm-offsets.c | 2 +- arch/s390/kernel/time.c | 1 + arch/s390/kernel/vdso32/clock_getres.S | 12 +- arch/s390/kernel/vdso64/clock_getres.S | 10 +- tools/testing/selftests/vDSO/Makefile | 2 + .../selftests/vDSO/vdso_clock_getres.c | 108 ++++++++++++++++++ 19 files changed, 159 insertions(+), 29 deletions(-) create mode 100644 tools/testing/selftests/vDSO/vdso_clock_getres.c -- 2.21.0

6 years, 6 months

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[PATCH 1/2] open: add close_range()

by Christian Brauner

This adds the close_range() syscall. It allows to efficiently close a range of file descriptors up to all file descriptors of a calling task. The syscall came up in a recent discussion around the new mount API and making new file descriptor types cloexec by default. During this discussion, Al suggested the close_range() syscall (cf. [1]). Note, a syscall in this manner has been requested by various people over time. First, it helps to close all file descriptors of an exec()ing task. This can be done safely via (quoting Al's example from [1] verbatim): /* that exec is sensitive */ unshare(CLONE_FILES); /* we don't want anything past stderr here */ close_range(3, ~0U); execve(....); The code snippet above is one way of working around the problem that file descriptors are not cloexec by default. This is aggravated by the fact that we can't just switch them over without massively regressing userspace. For a whole class of programs having an in-kernel method of closing all file descriptors is very helpful (e.g. demons, service managers, programming language standard libraries, container managers etc.). (Please note, unshare(CLONE_FILES) should only be needed if the calling task is multi-threaded and shares the file descriptor table with another thread in which case two threads could race with one thread allocating file descriptors and the other one closing them via close_range(). For the general case close_range() before the execve() is sufficient.) Second, it allows userspace to avoid implementing closing all file descriptors by parsing through /proc/<pid>/fd/* and calling close() on each file descriptor. From looking at various large(ish) userspace code bases this or similar patterns are very common in: - service managers (cf. [4]) - libcs (cf. [6]) - container runtimes (cf. [5]) - programming language runtimes/standard libraries - Python (cf. [2]) - Rust (cf. [7], [8]) As Dmitry pointed out there's even a long-standing glibc bug about missing kernel support for this task (cf. [3]). In addition, the syscall will also work for tasks that do not have procfs mounted and on kernels that do not have procfs support compiled in. In such situations the only way to make sure that all file descriptors are closed is to call close() on each file descriptor up to UINT_MAX or RLIMIT_NOFILE, OPEN_MAX trickery (cf. comment [8] on Rust). The performance is striking. For good measure, comparing the following simple close_all_fds() userspace implementation that is essentially just glibc's version in [6]: static int close_all_fds(void) { DIR *dir; struct dirent *direntp; dir = opendir("/proc/self/fd"); if (!dir) return -1; while ((direntp = readdir(dir))) { int fd; if (strcmp(direntp->d_name, ".") == 0) continue; if (strcmp(direntp->d_name, "..") == 0) continue; fd = atoi(direntp->d_name); if (fd == 0 || fd == 1 || fd == 2) continue; close(fd); } closedir(dir); /* cannot fail */ return 0; } to close_range() yields: 1. closing 4 open files: - close_all_fds(): ~280 us - close_range(): ~24 us 2. closing 1000 open files: - close_all_fds(): ~5000 us - close_range(): ~800 us close_range() is designed to allow for some flexibility. Specifically, it does not simply always close all open file descriptors of a task. Instead, callers can specify an upper bound. This is e.g. useful for scenarios where specific file descriptors are created with well-known numbers that are supposed to be excluded from getting closed. For extra paranoia close_range() comes with a flags argument. This can e.g. be used to implement extension. Once can imagine userspace wanting to stop at the first error instead of ignoring errors under certain circumstances. There might be other valid ideas in the future. In any case, a flag argument doesn't hurt and keeps us on the safe side. >From an implementation side this is kept rather dumb. It saw some input from David and Jann but all nonsense is obviously my own! - Errors to close file descriptors are currently ignored. (Could be changed by setting a flag in the future if needed.) - __close_range() is a rather simplistic wrapper around __close_fd(). My reasoning behind this is based on the nature of how __close_fd() needs to release an fd. But maybe I misunderstood specifics: We take the files_lock and rcu-dereference the fdtable of the calling task, we find the entry in the fdtable, get the file and need to release files_lock before calling filp_close(). In the meantime the fdtable might have been altered so we can't just retake the spinlock and keep the old rcu-reference of the fdtable around. Instead we need to grab a fresh reference to the fdtable. If my reasoning is correct then there's really no point in fancyfying __close_range(): We just need to rcu-dereference the fdtable of the calling task once to cap the max_fd value correctly and then go on calling __close_fd() in a loop. /* References */ [1]: https://lore.kernel.org/lkml/20190516165021.GD17978@ZenIV.linux.org.uk/ [2]: https://github.com/python/cpython/blob/9e4f2f3a6b8ee995c365e86d976937c141d8… [3]: https://sourceware.org/bugzilla/show_bug.cgi?id=10353#c7 [4]: https://github.com/systemd/systemd/blob/5238e9575906297608ff802a27e2ff9effa… [5]: https://github.com/lxc/lxc/blob/ddf4b77e11a4d08f09b7b9cd13e593f8c047edc5/sr… [6]: https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/gr… Note that this is an internal implementation that is not exported. Currently, libc seems to not provide an exported version of this because of missing kernel support to do this. [7]: https://github.com/rust-lang/rust/issues/12148 [8]: https://github.com/rust-lang/rust/blob/5f47c0613ed4eb46fca3633c1297364c09e5… Rust's solution is slightly different but is equally unperformant. Rust calls getdtablesize() which is a glibc library function that simply returns the current RLIMIT_NOFILE or OPEN_MAX values. Rust then goes on to call close() on each fd. That's obviously overkill for most tasks. Rarely, tasks - especially non-demons - hit RLIMIT_NOFILE or OPEN_MAX. Let's be nice and assume an unprivileged user with RLIMIT_NOFILE set to 1024. Even in this case, there's a very high chance that in the common case Rust is calling the close() syscall 1021 times pointlessly if the task just has 0, 1, and 2 open. Suggested-by: Al Viro <viro(a)zeniv.linux.org.uk> Signed-off-by: Christian Brauner <christian(a)brauner.io> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Dmitry V. Levin <ldv(a)altlinux.org> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: Florian Weimer <fweimer(a)redhat.com> Cc: linux-api(a)vger.kernel.org --- arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd32.h | 2 ++ arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/file.c | 30 +++++++++++++++++++++ fs/open.c | 20 ++++++++++++++ include/linux/fdtable.h | 2 ++ include/linux/syscalls.h | 2 ++ include/uapi/asm-generic/unistd.h | 4 ++- 22 files changed, 75 insertions(+), 1 deletion(-) diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl index 9e7704e44f6d..b55d93af8096 100644 --- a/arch/alpha/kernel/syscalls/syscall.tbl +++ b/arch/alpha/kernel/syscalls/syscall.tbl @@ -473,3 +473,4 @@ 541 common fsconfig sys_fsconfig 542 common fsmount sys_fsmount 543 common fspick sys_fspick +545 common close_range sys_close_range diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl index aaf479a9e92d..0125c97c75dd 100644 --- a/arch/arm/tools/syscall.tbl +++ b/arch/arm/tools/syscall.tbl @@ -447,3 +447,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index c39e90600bb3..9a3270d29b42 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -886,6 +886,8 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_close_range 435 +__SYSCALL(__NR_close_range, sys_close_range) /* * Please add new compat syscalls above this comment and update diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl index e01df3f2f80d..1a90b464e96f 100644 --- a/arch/ia64/kernel/syscalls/syscall.tbl +++ b/arch/ia64/kernel/syscalls/syscall.tbl @@ -354,3 +354,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl index 7e3d0734b2f3..2dee2050f9ef 100644 --- a/arch/m68k/kernel/syscalls/syscall.tbl +++ b/arch/m68k/kernel/syscalls/syscall.tbl @@ -433,3 +433,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 26339e417695..923ef69e5a76 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -439,3 +439,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 0e2dd68ade57..967ed9de51cd 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -372,3 +372,4 @@ 431 n32 fsconfig sys_fsconfig 432 n32 fsmount sys_fsmount 433 n32 fspick sys_fspick +435 n32 close_range sys_close_range diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl index 5eebfa0d155c..71de731102b1 100644 --- a/arch/mips/kernel/syscalls/syscall_n64.tbl +++ b/arch/mips/kernel/syscalls/syscall_n64.tbl @@ -348,3 +348,4 @@ 431 n64 fsconfig sys_fsconfig 432 n64 fsmount sys_fsmount 433 n64 fspick sys_fspick +435 n64 close_range sys_close_range diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl index 3cc1374e02d0..5a325ab29f88 100644 --- a/arch/mips/kernel/syscalls/syscall_o32.tbl +++ b/arch/mips/kernel/syscalls/syscall_o32.tbl @@ -421,3 +421,4 @@ 431 o32 fsconfig sys_fsconfig 432 o32 fsmount sys_fsmount 433 o32 fspick sys_fspick +435 o32 close_range sys_close_range diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index c9e377d59232..dcc0a0879139 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 103655d84b4b..ba2c1f078cbd 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -515,3 +515,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index e822b2964a83..d7c9043d2902 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig sys_fsconfig 432 common fsmount sys_fsmount sys_fsmount 433 common fspick sys_fspick sys_fspick +435 common close_range sys_close_range sys_close_range diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 016a727d4357..9b5e6bf0ce32 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index e047480b1605..8c674a1e0072 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -479,3 +479,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index ad968b7bac72..7f7a89a96707 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -438,3 +438,4 @@ 431 i386 fsconfig sys_fsconfig __ia32_sys_fsconfig 432 i386 fsmount sys_fsmount __ia32_sys_fsmount 433 i386 fspick sys_fspick __ia32_sys_fspick +435 i386 close_range sys_close_range __ia32_sys_close_range diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index b4e6f9e6204a..0f7d47ae921c 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -355,6 +355,7 @@ 431 common fsconfig __x64_sys_fsconfig 432 common fsmount __x64_sys_fsmount 433 common fspick __x64_sys_fspick +435 common close_range __x64_sys_close_range # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl index 5fa0ee1c8e00..b489532265d0 100644 --- a/arch/xtensa/kernel/syscalls/syscall.tbl +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -404,3 +404,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +435 common close_range sys_close_range diff --git a/fs/file.c b/fs/file.c index 3da91a112bab..3680977a685a 100644 --- a/fs/file.c +++ b/fs/file.c @@ -641,6 +641,36 @@ int __close_fd(struct files_struct *files, unsigned fd) } EXPORT_SYMBOL(__close_fd); /* for ksys_close() */ +/** + * __close_range() - Close all file descriptors in a given range. + * + * @fd: starting file descriptor to close + * @max_fd: last file descriptor to close + * + * This closes a range of file descriptors. All file descriptors + * from @fd up to and including @max_fd are closed. + */ +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) +{ + unsigned int cur_max; + + if (fd > max_fd) + return -EINVAL; + + rcu_read_lock(); + cur_max = files_fdtable(files)->max_fds; + rcu_read_unlock(); + + /* cap to last valid index into fdtable */ + if (max_fd >= cur_max) + max_fd = cur_max - 1; + + while (fd <= max_fd) + __close_fd(files, fd++); + + return 0; +} + /* * variant of __close_fd that gets a ref on the file for later fput */ diff --git a/fs/open.c b/fs/open.c index 9c7d724a6f67..c7baaee7aa47 100644 --- a/fs/open.c +++ b/fs/open.c @@ -1174,6 +1174,26 @@ SYSCALL_DEFINE1(close, unsigned int, fd) return retval; } +/** + * close_range() - Close all file descriptors in a given range. + * + * @fd: starting file descriptor to close + * @max_fd: last file descriptor to close + * @flags: reserved for future extensions + * + * This closes a range of file descriptors. All file descriptors + * from @fd up to and including @max_fd are closed. + * Currently, errors to close a given file descriptor are ignored. + */ +SYSCALL_DEFINE3(close_range, unsigned int, fd, unsigned int, max_fd, + unsigned int, flags) +{ + if (flags) + return -EINVAL; + + return __close_range(current->files, fd, max_fd); +} + /* * This routine simulates a hangup on the tty, to arrange that users * are given clean terminals at login time. diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h index f07c55ea0c22..fcd07181a365 100644 --- a/include/linux/fdtable.h +++ b/include/linux/fdtable.h @@ -121,6 +121,8 @@ extern void __fd_install(struct files_struct *files, unsigned int fd, struct file *file); extern int __close_fd(struct files_struct *files, unsigned int fd); +extern int __close_range(struct files_struct *files, unsigned int fd, + unsigned int max_fd); extern int __close_fd_get_file(unsigned int fd, struct file **res); extern struct kmem_cache *files_cachep; diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e2870fe1be5b..c0189e223255 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -441,6 +441,8 @@ asmlinkage long sys_fchown(unsigned int fd, uid_t user, gid_t group); asmlinkage long sys_openat(int dfd, const char __user *filename, int flags, umode_t mode); asmlinkage long sys_close(unsigned int fd); +asmlinkage long sys_close_range(unsigned int fd, unsigned int max_fd, + unsigned int flags); asmlinkage long sys_vhangup(void); /* fs/pipe.c */ diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index a87904daf103..3f36c8745d24 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -844,9 +844,11 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_close_range 435 +__SYSCALL(__NR_close_range, sys_close_range) #undef __NR_syscalls -#define __NR_syscalls 434 +#define __NR_syscalls 436 /* * 32 bit systems traditionally used different -- 2.21.0

6 years, 6 months

6
14
0 0

[PATCH v5.2-rc2 0/2] selftests: Remove forced unbuffering for test running

by Kees Cook

This should fix test regressions seen when running under unbuffered output. Additionally, fixes are added for the missing flushed output in the timers test which become obvious without unbuffered output. -Kees Kees Cook (2): selftests: Remove forced unbuffering for test running selftests/timers: Add missing fflush(stdout) calls tools/testing/selftests/kselftest/runner.sh | 12 +----------- tools/testing/selftests/timers/adjtick.c | 1 + tools/testing/selftests/timers/leapcrash.c | 1 + tools/testing/selftests/timers/mqueue-lat.c | 1 + tools/testing/selftests/timers/nanosleep.c | 1 + tools/testing/selftests/timers/nsleep-lat.c | 1 + tools/testing/selftests/timers/raw_skew.c | 1 + tools/testing/selftests/timers/set-tai.c | 1 + tools/testing/selftests/timers/set-tz.c | 2 ++ tools/testing/selftests/timers/threadtest.c | 1 + tools/testing/selftests/timers/valid-adjtimex.c | 2 ++ 11 files changed, 13 insertions(+), 11 deletions(-) -- 2.17.1

6 years, 6 months

3
4
0 0

[PATCH v2 1/2] pid: add pidfd_open()

by Christian Brauner

This adds the pidfd_open() syscall. It allows a caller to retrieve pollable pidfds for a process which did not get created via CLONE_PIDFD, i.e. for a process that is created via traditional fork()/clone() calls that is only referenced by a PID: int pidfd = pidfd_open(1234, 0); ret = pidfd_send_signal(pidfd, SIGSTOP, NULL, 0); With the introduction of pidfds through CLONE_PIDFD it is possible to created pidfds at process creation time. However, a lot of processes get created with traditional PID-based calls such as fork() or clone() (without CLONE_PIDFD). For these processes a caller can currently not create a pollable pidfd. This is a problem for Android's low memory killer (LMK) and service managers such as systemd. Both are examples of tools that want to make use of pidfds to get reliable notification of process exit for non-parents (pidfd polling) and race-free signal sending (pidfd_send_signal()). They intend to switch to this API for process supervision/management as soon as possible. Having no way to get pollable pidfds from PID-only processes is one of the biggest blockers for them in adopting this api. With pidfd_open() making it possible to retrieve pidfds for PID-based processes we enable them to adopt this api. In line with Arnd's recent changes to consolidate syscall numbers across architectures, I have added the pidfd_open() syscall to all architectures at the same time. Signed-off-by: Christian Brauner <christian(a)brauner.io> Reviewed-by: Oleg Nesterov <oleg(a)redhat.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: "Eric W. Biederman" <ebiederm(a)xmission.com> Cc: Kees Cook <keescook(a)chromium.org> Cc: Joel Fernandes (Google) <joel(a)joelfernandes.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Andy Lutomirsky <luto(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Aleksa Sarai <cyphar(a)cyphar.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: linux-api(a)vger.kernel.org --- v1: - kbuild test robot <lkp(a)intel.com>: - add missing entry for pidfd_open to arch/arm/tools/syscall.tbl - Oleg Nesterov <oleg(a)redhat.com>: - use simpler thread-group leader check v2: - Oleg Nesterov <oleg(a)redhat.com>: - avoid using additional variable - remove unneeded comment - Arnd Bergmann <arnd(a)arndb.de>: - switch from 428 to 434 since the new mount api has taken it - bump syscall numbers in arch/arm64/include/asm/unistd.h - Joel Fernandes (Google) <joel(a)joelfernandes.org>: - switch from ESRCH to EINVAL when the passed-in pid does not refer to a thread-group leader - Christian Brauner <christian(a)brauner.io>: - rebase on v5.2-rc1 - adapt syscall number to account for new mount api syscalls --- arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd.h | 2 +- arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + include/linux/pid.h | 1 + include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 4 +- kernel/fork.c | 2 +- kernel/pid.c | 43 +++++++++++++++++++++ 21 files changed, 66 insertions(+), 3 deletions(-) diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl index 9e7704e44f6d..1db9bbcfb84e 100644 --- a/arch/alpha/kernel/syscalls/syscall.tbl +++ b/arch/alpha/kernel/syscalls/syscall.tbl @@ -473,3 +473,4 @@ 541 common fsconfig sys_fsconfig 542 common fsmount sys_fsmount 543 common fspick sys_fspick +544 common pidfd_open sys_pidfd_open diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl index aaf479a9e92d..81e6e1817c45 100644 --- a/arch/arm/tools/syscall.tbl +++ b/arch/arm/tools/syscall.tbl @@ -447,3 +447,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 70e6882853c0..e8f7d95a1481 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -44,7 +44,7 @@ #define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5) #define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800) -#define __NR_compat_syscalls 434 +#define __NR_compat_syscalls 435 #endif #define __ARCH_WANT_SYS_CLONE diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index c39e90600bb3..7a3158ccd68e 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -886,6 +886,8 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_pidfd_open 434 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) /* * Please add new compat syscalls above this comment and update diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl index e01df3f2f80d..ecc44926737b 100644 --- a/arch/ia64/kernel/syscalls/syscall.tbl +++ b/arch/ia64/kernel/syscalls/syscall.tbl @@ -354,3 +354,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl index 7e3d0734b2f3..9a3eb2558568 100644 --- a/arch/m68k/kernel/syscalls/syscall.tbl +++ b/arch/m68k/kernel/syscalls/syscall.tbl @@ -433,3 +433,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 26339e417695..ad706f83c755 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -439,3 +439,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 0e2dd68ade57..97035e19ad03 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -372,3 +372,4 @@ 431 n32 fsconfig sys_fsconfig 432 n32 fsmount sys_fsmount 433 n32 fspick sys_fspick +434 n32 pidfd_open sys_pidfd_open diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index c9e377d59232..5022b9e179c2 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 103655d84b4b..f2c3bda2d39f 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -515,3 +515,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index e822b2964a83..6ebacfeaf853 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig sys_fsconfig 432 common fsmount sys_fsmount sys_fsmount 433 common fspick sys_fspick sys_fspick +434 common pidfd_open sys_pidfd_open sys_pidfd_open diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 016a727d4357..834c9c7d79fa 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -436,3 +436,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index e047480b1605..c58e71f21129 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -479,3 +479,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index ad968b7bac72..43e4429a5272 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -438,3 +438,4 @@ 431 i386 fsconfig sys_fsconfig __ia32_sys_fsconfig 432 i386 fsmount sys_fsmount __ia32_sys_fsmount 433 i386 fspick sys_fspick __ia32_sys_fspick +434 i386 pidfd_open sys_pidfd_open __ia32_sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index b4e6f9e6204a..1bee0a77fdd3 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -355,6 +355,7 @@ 431 common fsconfig __x64_sys_fsconfig 432 common fsmount __x64_sys_fsmount 433 common fspick __x64_sys_fspick +434 common pidfd_open __x64_sys_pidfd_open # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl index 5fa0ee1c8e00..782b81945ccc 100644 --- a/arch/xtensa/kernel/syscalls/syscall.tbl +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -404,3 +404,4 @@ 431 common fsconfig sys_fsconfig 432 common fsmount sys_fsmount 433 common fspick sys_fspick +434 common pidfd_open sys_pidfd_open diff --git a/include/linux/pid.h b/include/linux/pid.h index 3c8ef5a199ca..c938a92eab99 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -67,6 +67,7 @@ struct pid extern struct pid init_struct_pid; extern const struct file_operations pidfd_fops; +extern int pidfd_create(struct pid *pid); static inline struct pid *get_pid(struct pid *pid) { diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e2870fe1be5b..989055e0b501 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -929,6 +929,7 @@ asmlinkage long sys_clock_adjtime32(clockid_t which_clock, struct old_timex32 __user *tx); asmlinkage long sys_syncfs(int fd); asmlinkage long sys_setns(int fd, int nstype); +asmlinkage long sys_pidfd_open(pid_t pid, unsigned int flags); asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags); asmlinkage long sys_process_vm_readv(pid_t pid, diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index a87904daf103..e5684a4512c0 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -844,9 +844,11 @@ __SYSCALL(__NR_fsconfig, sys_fsconfig) __SYSCALL(__NR_fsmount, sys_fsmount) #define __NR_fspick 433 __SYSCALL(__NR_fspick, sys_fspick) +#define __NR_pidfd_open 434 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) #undef __NR_syscalls -#define __NR_syscalls 434 +#define __NR_syscalls 435 /* * 32 bit systems traditionally used different diff --git a/kernel/fork.c b/kernel/fork.c index b4cba953040a..c3df226f47a1 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1724,7 +1724,7 @@ const struct file_operations pidfd_fops = { * Return: On success, a cloexec pidfd is returned. * On error, a negative errno number will be returned. */ -static int pidfd_create(struct pid *pid) +int pidfd_create(struct pid *pid) { int fd; diff --git a/kernel/pid.c b/kernel/pid.c index 89548d35eefb..8fc9d94f6ac1 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -37,6 +37,7 @@ #include <linux/syscalls.h> #include <linux/proc_ns.h> #include <linux/proc_fs.h> +#include <linux/sched/signal.h> #include <linux/sched/task.h> #include <linux/idr.h> @@ -450,6 +451,48 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns) return idr_get_next(&ns->idr, &nr); } +/** + * pidfd_open() - Open new pid file descriptor. + * + * @pid: pid for which to retrieve a pidfd + * @flags: flags to pass + * + * This creates a new pid file descriptor with the O_CLOEXEC flag set for + * the process identified by @pid. Currently, the process identified by + * @pid must be a thread-group leader. This restriction currently exists + * for all aspects of pidfds including pidfd creation (CLONE_PIDFD cannot + * be used with CLONE_THREAD) and pidfd polling (only supports thread group + * leaders). + * + * Return: On success, a cloexec pidfd is returned. + * On error, a negative errno number will be returned. + */ +SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) +{ + int fd, ret; + struct pid *p; + + if (flags) + return -EINVAL; + + if (pid <= 0) + return -EINVAL; + + p = find_get_pid(pid); + if (!p) + return -ESRCH; + + ret = 0; + rcu_read_lock(); + if (!pid_task(p, PIDTYPE_TGID)) + ret = -EINVAL; + rcu_read_unlock(); + + fd = ret ?: pidfd_create(p); + put_pid(p); + return fd; +} + void __init pid_idr_init(void) { /* Verify no one has done anything silly: */ -- 2.21.0

6 years, 7 months

3
5
0 0

Inquiry 20/May/2019

by Daniel Murray

Hi,friend, This is Daniel Murray and i am from Sinara Group Co.Ltd in Russia. We are glad to know about your company from the web and we are interested in your products. Could you kindly send us your Latest catalog and price list for our trial order. Best Regards, Daniel Murray Purchasing Manager

6 years, 7 months

1
0
0 0

[PATCH] KVM: selftests: Remove duplicated TEST_ASSERT in hyperv_cpuid.c

by Thomas Huth

The check for entry->index == 0 is done twice. One time should be sufficient. Suggested-by: Vitaly Kuznetsov <vkuznets(a)redhat.com> Signed-off-by: Thomas Huth <thuth(a)redhat.com> --- Vitaly already noticed this in his review to the "Fix a condition in test_hv_cpuid()" patch a couple of days ago, but so far I haven't seen any patch yet on the list that fixes this ... if I missed it instead, please simply ignore this patch. tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c index 9a21e912097c..8bdf1e7da6cc 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c @@ -52,9 +52,6 @@ static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries, TEST_ASSERT(entry->index == 0, ".index field should be zero"); - TEST_ASSERT(entry->index == 0, - ".index field should be zero"); - TEST_ASSERT(entry->flags == 0, ".flags field should be zero"); -- 2.21.0

6 years, 7 months

2
1
0 0

[PATCH] KVM: selftests: Fix a condition in test_hv_cpuid()

by Dan Carpenter

The code is trying to check that all the padding is zeroed out and it does this: entry->padding[0] == entry->padding[1] == entry->padding[2] == 0 Assume everything is zeroed correctly, then the first comparison is true, the next comparison is false and false is equal to zero so the overall condition is true. This bug doesn't affect run time very badly, but the code should instead just check that all three paddings are zero individually. Also the error message was copy and pasted from an earlier error and it wasn't correct. Fixes: 7edcb7343327 ("KVM: selftests: Add hyperv_cpuid test") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> --- tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c index 9a21e912097c..63b9fc3fdfbe 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c @@ -58,9 +58,8 @@ static void test_hv_cpuid(struct kvm_cpuid2 *hv_cpuid_entries, TEST_ASSERT(entry->flags == 0, ".flags field should be zero"); - TEST_ASSERT(entry->padding[0] == entry->padding[1] - == entry->padding[2] == 0, - ".index field should be zero"); + TEST_ASSERT(!entry->padding[0] && !entry->padding[1] && + !entry->padding[2], "padding should be zero"); /* * If needed for debug: -- 2.20.1

6 years, 7 months

4
3
0 0

Re: [PATCH 1/3] kselftest/cgroup: fix unexcepted testing failure on test_memcontrol

by Alex Shi

> Hi Alex! > > Sorry for the late reply, somehow I missed your e-mails. > > The patchset looks good to me, except a typo in subjects/commit logs: > you probably meant "unexpected failures". > > Please, fix and feel free to use: > Reviewed-by: Roman Gushchin <guro(a)fb.com> > for the series. > Thanks Roman! BTW, do you know other test cases for cgroup2 function or performance? Thanks Alex

6 years, 7 months

1
0
0 0

[PATCH v2 3/3] kselftest/cgroup: fix incorrect test_core skip

by Alex Shi

The test_core will skip the test_cgcore_no_internal_process_constraint_on_threads test case if the 'cpu' controller missing in root's subtree_control. In fact we need to set the 'cpu' in subtree_control, to make the testing meaningful. ./test_core ... ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads ... Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> --- tools/testing/selftests/cgroup/test_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index b1a570d7c557..2ffc3e07d98d 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -198,7 +198,7 @@ static int test_cgcore_no_internal_process_constraint_on_threads(const char *roo char *parent = NULL, *child = NULL; if (cg_read_strstr(root, "cgroup.controllers", "cpu") || - cg_read_strstr(root, "cgroup.subtree_control", "cpu")) { + cg_write(root, "cgroup.subtree_control", "+cpu")) { ret = KSFT_SKIP; goto cleanup; } -- 2.19.1.856.g8858448bb

6 years, 7 months

1
0
0 0

[PATCH v2 2/3] kselftest/cgroup: fix unexpected testing failure on test_core

by Alex Shi

The cgroup testing relys on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, some test cases will be failed as following: $sudo ./test_core not ok 1 test_cgcore_internal_process_constraint ok 2 test_cgcore_top_down_constraint_enable not ok 3 test_cgcore_top_down_constraint_disable ... To correct this unexpected failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Tejun Heo <tj(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Claudio Zumbo <claudioz(a)fb.com> Cc: Claudio <claudiozumbo(a)gmail.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Reviewed-by: Roman Gushchin <guro(a)fb.com> --- tools/testing/selftests/cgroup/test_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c index be59f9c34ea2..b1a570d7c557 100644 --- a/tools/testing/selftests/cgroup/test_core.c +++ b/tools/testing/selftests/cgroup/test_core.c @@ -376,6 +376,11 @@ int main(int argc, char *argv[]) if (cg_find_unified_root(root, sizeof(root))) ksft_exit_skip("cgroup v2 isn't mounted\n"); + + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set root memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.19.1.856.g8858448bb

6 years, 7 months

1
0
0 0

Re: [PATCH 1/3] kselftest/cgroup: fix unexcepted testing failure on test_memcontrol

by Alex Shi

> Hi Alex! > > Sorry for the late reply, somehow I missed your e-mails. > > The patchset looks good to me, except a typo in subjects/commit logs: > you probably meant "unexpected failures". > > Please, fix and feel free to use: > Reviewed-by: Roman Gushchin <guro(a)fb.com> > for the series. Hi Roman, Thanks for the typo correct and review. I will resend them with your suggestion. BTW, How do you test cgroup2 except kselftest? Any other function/performance testing case? Thanks a lot! Alex

6 years, 7 months

1
0
0 0

[PATCH v1 1/2] pid: add pidfd_open()

by Christian Brauner

This adds the pidfd_open() syscall. It allows a caller to retrieve pollable pidfds for a process which did not get created via CLONE_PIDFD, i.e. for a process that is created via traditional fork()/clone() calls that is only referenced by a PID: int pidfd = pidfd_open(1234, 0); ret = pidfd_send_signal(pidfd, SIGSTOP, NULL, 0); With the introduction of pidfds through CLONE_PIDFD it is possible to created pidfds at process creation time. However, a lot of processes get created with traditional PID-based calls such as fork() or clone() (without CLONE_PIDFD). For these processes a caller can currently not create a pollable pidfd. This is a huge problem for Android's low memory killer (LMK) and service managers such as systemd. Both are examples of tools that want to make use of pidfds to get reliable notification of process exit for non-parents (pidfd polling) and race-free signal sending (pidfd_send_signal()). They intend to switch to this API for process supervision/management as soon as possible. Having no way to get pollable pidfds from PID-only processes is one of the biggest blockers for them in adopting this api. With pidfd_open() making it possible to retrieve pidfd for PID-based processes we enable them to adopt this api. In line with Arnd's recent changes to consolidate syscall numbers across architectures, I have added the pidfd_open() syscall to all architectures at the same time. Signed-off-by: Christian Brauner <christian(a)brauner.io> Acked-by: Geert Uytterhoeven <geert(a)linux-m68k.org> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: "Eric W. Biederman" <ebiederm(a)xmission.com> Cc: Kees Cook <keescook(a)chromium.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Andy Lutomirsky <luto(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: Aleksa Sarai <cyphar(a)cyphar.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: linux-api(a)vger.kernel.org --- v1: - kbuild test robot <lkp(a)intel.com>: - add missing entry for pidfd_open to arch/arm/tools/syscall.tbl - Oleg Nesterov <oleg(a)redhat.com>: - use simpler thread-group leader check --- arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + include/linux/pid.h | 1 + include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 4 +- kernel/fork.c | 2 +- kernel/pid.c | 50 +++++++++++++++++++++ 20 files changed, 72 insertions(+), 2 deletions(-) diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl index 165f268beafc..ddc3c93ad7a7 100644 --- a/arch/alpha/kernel/syscalls/syscall.tbl +++ b/arch/alpha/kernel/syscalls/syscall.tbl @@ -467,3 +467,4 @@ 535 common io_uring_setup sys_io_uring_setup 536 common io_uring_enter sys_io_uring_enter 537 common io_uring_register sys_io_uring_register +538 common pidfd_open sys_pidfd_open diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl index 0393917eaa57..fc41fb34a636 100644 --- a/arch/arm/tools/syscall.tbl +++ b/arch/arm/tools/syscall.tbl @@ -441,3 +441,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index 23f1a44acada..350e2049b4a9 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -874,6 +874,8 @@ __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup) __SYSCALL(__NR_io_uring_enter, sys_io_uring_enter) #define __NR_io_uring_register 427 __SYSCALL(__NR_io_uring_register, sys_io_uring_register) +#define __NR_pidfd_open 428 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) /* * Please add new compat syscalls above this comment and update diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl index 56e3d0b685e1..7115f6dd347a 100644 --- a/arch/ia64/kernel/syscalls/syscall.tbl +++ b/arch/ia64/kernel/syscalls/syscall.tbl @@ -348,3 +348,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl index df4ec3ec71d1..44bf12b16ffe 100644 --- a/arch/m68k/kernel/syscalls/syscall.tbl +++ b/arch/m68k/kernel/syscalls/syscall.tbl @@ -427,3 +427,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 4964947732af..0d32e5152dc0 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -433,3 +433,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 9392dfe33f97..726e107b3c9f 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -366,3 +366,4 @@ 425 n32 io_uring_setup sys_io_uring_setup 426 n32 io_uring_enter sys_io_uring_enter 427 n32 io_uring_register sys_io_uring_register +428 n32 pidfd_open sys_pidfd_open diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index fe8ca623add8..83b46b568d51 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -424,3 +424,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 00f5a63c8d9a..5294d04d7fa5 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -509,3 +509,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index 061418f787c3..dcdb838adf49 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 425 common io_uring_setup sys_io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open sys_pidfd_open diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 480b057556ee..8e66edfbc521 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index a1dd24307b00..d6f3bc686939 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -473,3 +473,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index 4cd5f982b1e5..1af6b469160a 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -438,3 +438,4 @@ 425 i386 io_uring_setup sys_io_uring_setup __ia32_sys_io_uring_setup 426 i386 io_uring_enter sys_io_uring_enter __ia32_sys_io_uring_enter 427 i386 io_uring_register sys_io_uring_register __ia32_sys_io_uring_register +428 i386 pidfd_open sys_pidfd_open __ia32_sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 64ca0d06259a..c18e6ebe3387 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -355,6 +355,7 @@ 425 common io_uring_setup __x64_sys_io_uring_setup 426 common io_uring_enter __x64_sys_io_uring_enter 427 common io_uring_register __x64_sys_io_uring_register +428 common pidfd_open __x64_sys_pidfd_open # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl index 30084eaf8422..21ee795f3003 100644 --- a/arch/xtensa/kernel/syscalls/syscall.tbl +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -398,3 +398,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/include/linux/pid.h b/include/linux/pid.h index 3c8ef5a199ca..c938a92eab99 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -67,6 +67,7 @@ struct pid extern struct pid init_struct_pid; extern const struct file_operations pidfd_fops; +extern int pidfd_create(struct pid *pid); static inline struct pid *get_pid(struct pid *pid) { diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e2870fe1be5b..989055e0b501 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -929,6 +929,7 @@ asmlinkage long sys_clock_adjtime32(clockid_t which_clock, struct old_timex32 __user *tx); asmlinkage long sys_syncfs(int fd); asmlinkage long sys_setns(int fd, int nstype); +asmlinkage long sys_pidfd_open(pid_t pid, unsigned int flags); asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags); asmlinkage long sys_process_vm_readv(pid_t pid, diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index dee7292e1df6..94a257a93d20 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -832,9 +832,11 @@ __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup) __SYSCALL(__NR_io_uring_enter, sys_io_uring_enter) #define __NR_io_uring_register 427 __SYSCALL(__NR_io_uring_register, sys_io_uring_register) +#define __NR_pidfd_open 428 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) #undef __NR_syscalls -#define __NR_syscalls 428 +#define __NR_syscalls 429 /* * 32 bit systems traditionally used different diff --git a/kernel/fork.c b/kernel/fork.c index 737db1828437..980cc1d2b8d4 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1714,7 +1714,7 @@ const struct file_operations pidfd_fops = { * Return: On success, a cloexec pidfd is returned. * On error, a negative errno number will be returned. */ -static int pidfd_create(struct pid *pid) +int pidfd_create(struct pid *pid) { int fd; diff --git a/kernel/pid.c b/kernel/pid.c index 20881598bdfa..4afca3d6dcb8 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -38,6 +38,7 @@ #include <linux/syscalls.h> #include <linux/proc_ns.h> #include <linux/proc_fs.h> +#include <linux/sched/signal.h> #include <linux/sched/task.h> #include <linux/idr.h> @@ -451,6 +452,55 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns) return idr_get_next(&ns->idr, &nr); } +/** + * pidfd_open() - Open new pid file descriptor. + * + * @pid: pid for which to retrieve a pidfd + * @flags: flags to pass + * + * This creates a new pid file descriptor with the O_CLOEXEC flag set for + * the process identified by @pid. Currently, the process identified by + * @pid must be a thread-group leader. This restriction currently exists + * for all aspects of pidfds including pidfd creation (CLONE_PIDFD cannot + * be used with CLONE_THREAD) and pidfd polling (only supports thread group + * leaders). + * + * Return: On success, a cloexec pidfd is returned. + * On error, a negative errno number will be returned. + */ +SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) +{ + int fd, ret; + struct pid *p; + struct task_struct *tsk; + + if (flags) + return -EINVAL; + + if (pid <= 0) + return -EINVAL; + + p = find_get_pid(pid); + if (!p) + return -ESRCH; + + ret = 0; + rcu_read_lock(); + /* + * If this returns non-NULL the pid was used as a thread-group + * leader. Note, we race with exec here: If it changes the + * thread-group leader we might return the old leader. + */ + tsk = pid_task(p, PIDTYPE_TGID); + if (!tsk) + ret = -ESRCH; + rcu_read_unlock(); + + fd = ret ?: pidfd_create(p); + put_pid(p); + return fd; +} + void __init pid_idr_init(void) { /* Verify no one has done anything silly: */ -- 2.21.0

6 years, 7 months

5
12
0 0

[PATCH bpf-next 0/2] Move bpf_printk to bpf_helpers.h

by Michal Rostecki

This series of patches move the commonly used bpf_printk macro to bpf_helpers.h which is already included in all BPF programs which defined that macro on their own. Michal Rostecki (2): selftests: bpf: Move bpf_printk to bpf_helpers.h samples: bpf: Do not define bpf_printk macro samples/bpf/hbm_kern.h | 12 +++--------- samples/bpf/hbm_out_kern.c | 2 ++ samples/bpf/tcp_basertt_kern.c | 7 ------- samples/bpf/tcp_bufs_kern.c | 7 ------- samples/bpf/tcp_clamp_kern.c | 7 ------- samples/bpf/tcp_cong_kern.c | 7 ------- samples/bpf/tcp_iw_kern.c | 7 ------- samples/bpf/tcp_rwnd_kern.c | 7 ------- samples/bpf/tcp_synrto_kern.c | 7 ------- samples/bpf/tcp_tos_reflect_kern.c | 7 ------- samples/bpf/xdp_sample_pkts_kern.c | 7 ------- tools/testing/selftests/bpf/bpf_helpers.h | 8 ++++++++ .../testing/selftests/bpf/progs/sockmap_parse_prog.c | 7 ------- .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 7 ------- .../selftests/bpf/progs/sockmap_verdict_prog.c | 7 ------- .../testing/selftests/bpf/progs/test_lwt_seg6local.c | 7 ------- .../testing/selftests/bpf/progs/test_xdp_noinline.c | 7 ------- tools/testing/selftests/bpf/test_sockmap_kern.h | 7 ------- 18 files changed, 13 insertions(+), 114 deletions(-) -- 2.21.0

6 years, 7 months

2
4
0 0

[PATCH v3] selftests/x86: Support Atom for syscall_arg_fault test

by Tong Bo

Atom-based CPUs trigger stack fault when invoke 32-bit SYSENTER instruction with invalid register values. So we also need SIGBUS handling in this case. Following is assembly when the fault exception happens. (gdb) disassemble $eip Dump of assembler code for function __kernel_vsyscall: 0xf7fd8fe0 <+0>: push %ecx 0xf7fd8fe1 <+1>: push %edx 0xf7fd8fe2 <+2>: push %ebp 0xf7fd8fe3 <+3>: mov %esp,%ebp 0xf7fd8fe5 <+5>: sysenter 0xf7fd8fe7 <+7>: int $0x80 => 0xf7fd8fe9 <+9>: pop %ebp 0xf7fd8fea <+10>: pop %edx 0xf7fd8feb <+11>: pop %ecx 0xf7fd8fec <+12>: ret End of assembler dump. According to Intel SDM, this could also be a Stack Segment Fault(#SS, 12), except a normal Page Fault(#PF, 14). Especially, in section 6.9 of Vol.3A, both stack and page faults are within the 10th(lowest priority) class, and as it said, "exceptions within each class are implementation-dependent and may vary from processor to processor". It's expected for processors like Intel Atom to trigger stack fault(SIGBUS), while we get page fault(SIGSEGV) from common Core processors. Signed-off-by: Tong Bo <bo.tong(a)intel.com> Acked-by: Andy Lutomirski <luto(a)kernel.org> --- tools/testing/selftests/x86/syscall_arg_fault.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/x86/syscall_arg_fault.c b/tools/testing/selftests/x86/syscall_arg_fault.c index 7db4fc9..d2548401 100644 --- a/tools/testing/selftests/x86/syscall_arg_fault.c +++ b/tools/testing/selftests/x86/syscall_arg_fault.c @@ -43,7 +43,7 @@ static sigjmp_buf jmpbuf; static volatile sig_atomic_t n_errs; -static void sigsegv(int sig, siginfo_t *info, void *ctx_void) +static void sigsegv_or_sigbus(int sig, siginfo_t *info, void *ctx_void) { ucontext_t *ctx = (ucontext_t*)ctx_void; @@ -73,7 +73,13 @@ int main() if (sigaltstack(&stack, NULL) != 0) err(1, "sigaltstack"); - sethandler(SIGSEGV, sigsegv, SA_ONSTACK); + sethandler(SIGSEGV, sigsegv_or_sigbus, SA_ONSTACK); + /* + * The actual exception can vary. On Atom CPUs, we get #SS + * instead of #PF when the vDSO fails to access the stack when + * ESP is too close to 2^32, and #SS causes SIGBUS. + */ + sethandler(SIGBUS, sigsegv_or_sigbus, SA_ONSTACK); sethandler(SIGILL, sigill, SA_ONSTACK); /* -- 2.7.4

6 years, 7 months

3
3
0 0

[PATCH] KVM: selftests: Compile code with warnings enabled

by Thomas Huth

So far the KVM selftests are compiled without any compiler warnings enabled. That's quite bad, since we miss a lot of possible bugs this way. Let's enable at least "-Wall" and some other useful warning flags now. Signed-off-by: Thomas Huth <thuth(a)redhat.com> --- This patch fixes most of the warnings in the x86 code already - but for some warnings, I was not quite sure (e.g. about the need for the kvm_get_supported_cpuid_entry(1) in some tests), so I did not touch that code yet. I also did not check aarch64 yet. I'd be glad if someone who knows these parts of the code could have a look at the warnings there. tools/testing/selftests/kvm/Makefile | 4 +++- tools/testing/selftests/kvm/dirty_log_test.c | 6 +++++- tools/testing/selftests/kvm/lib/kvm_util.c | 3 --- tools/testing/selftests/kvm/lib/x86_64/processor.c | 4 +--- tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c | 1 + tools/testing/selftests/kvm/x86_64/platform_info_test.c | 1 - tools/testing/selftests/kvm/x86_64/smm_test.c | 3 +-- .../selftests/kvm/x86_64/vmx_close_while_nested_test.c | 5 +---- tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c | 5 ++--- 9 files changed, 14 insertions(+), 18 deletions(-) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index f8588cca2bef..93f344bb96af 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -32,7 +32,9 @@ LIBKVM += $(LIBKVM_$(UNAME_M)) INSTALL_HDR_PATH = $(top_srcdir)/usr LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/ LINUX_TOOL_INCLUDE = $(top_srcdir)/tools/include -CFLAGS += -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude -I$(<D) -Iinclude/$(UNAME_M) -I.. +CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \ + -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \ + -I$(LINUX_HDR_PATH) -Iinclude -I$(<D) -Iinclude/$(UNAME_M) -I.. no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \ $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie) diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index 93f99c6b7d79..0b9f197a783e 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -131,6 +131,7 @@ static void *vcpu_worker(void *data) while (!READ_ONCE(host_quit)) { /* Let the guest dirty the random pages */ ret = _vcpu_run(vm, VCPU_ID); + TEST_ASSERT(ret == 0, "vcpu_run failed: %d\n", ret); if (get_ucall(vm, VCPU_ID, &uc) == UCALL_SYNC) { pages_count += TEST_PAGES_PER_LOOP; generate_random_array(guest_array, TEST_PAGES_PER_LOOP); @@ -426,8 +427,11 @@ int main(int argc, char *argv[]) unsigned long interval = TEST_HOST_LOOP_INTERVAL; bool mode_selected = false; uint64_t phys_offset = 0; - unsigned int mode, host_ipa_limit; + unsigned int mode; int opt, i; +#ifdef __aarch64__ + unsigned int host_ipa_limit; +#endif #ifdef USE_CLEAR_DIRTY_LOG if (!kvm_check_cap(KVM_CAP_MANUAL_DIRTY_LOG_PROTECT)) { diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 4ca96b228e46..e2528a3894cf 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -135,7 +135,6 @@ struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm, unsigned long type) { struct kvm_vm *vm; - int kvm_fd; vm = calloc(1, sizeof(*vm)); TEST_ASSERT(vm != NULL, "Insufficient Memory"); @@ -556,7 +555,6 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm, uint32_t flags) { int ret; - unsigned long pmem_size = 0; struct userspace_mem_region *region; size_t huge_page_size = KVM_UTIL_PGS_PER_HUGEPG * vm->page_size; @@ -1302,7 +1300,6 @@ void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_sregs *sregs) int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_sregs *sregs) { struct vcpu *vcpu = vcpu_find(vm, vcpuid); - int ret; TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid); diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index dc7fae9fa424..21f3040d90cb 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -229,8 +229,6 @@ void sregs_dump(FILE *stream, struct kvm_sregs *sregs, void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot) { - int rc; - TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use " "unknown or unsupported guest mode, mode: 0x%x", vm->mode); @@ -549,7 +547,6 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) struct pageDirectoryPointerEntry *pdpe; struct pageDirectoryEntry *pde; struct pageTableEntry *pte; - void *hva; TEST_ASSERT(vm->mode == VM_MODE_P52V48_4K, "Attempt to use " "unknown or unsupported guest mode, mode: 0x%x", vm->mode); @@ -582,6 +579,7 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) unmapped_gva: TEST_ASSERT(false, "No mapping for vm virtual address, " "gva: 0x%lx", gva); + exit(EXIT_FAILURE); } static void kvm_setup_gdt(struct kvm_vm *vm, struct kvm_dtable *dt, int gdt_memslot, diff --git a/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c b/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c index 7c2c4d4055a8..63cc9c3f5ab6 100644 --- a/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c +++ b/tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c @@ -87,6 +87,7 @@ int main(int argc, char *argv[]) while (1) { rc = _vcpu_run(vm, VCPU_ID); + TEST_ASSERT(rc == 0, "vcpu_run failed: %d\n", rc); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "Unexpected exit reason: %u (%s),\n", run->exit_reason, diff --git a/tools/testing/selftests/kvm/x86_64/platform_info_test.c b/tools/testing/selftests/kvm/x86_64/platform_info_test.c index eb3e7a838cb4..40050e44ec0a 100644 --- a/tools/testing/selftests/kvm/x86_64/platform_info_test.c +++ b/tools/testing/selftests/kvm/x86_64/platform_info_test.c @@ -81,7 +81,6 @@ static void test_msr_platform_info_disabled(struct kvm_vm *vm) int main(int argc, char *argv[]) { struct kvm_vm *vm; - struct kvm_run *state; int rv; uint64_t msr_platform_info; diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c index fb8086964d83..4daf520bada1 100644 --- a/tools/testing/selftests/kvm/x86_64/smm_test.c +++ b/tools/testing/selftests/kvm/x86_64/smm_test.c @@ -87,7 +87,6 @@ void guest_code(struct vmx_pages *vmx_pages) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages = NULL; vm_vaddr_t vmx_pages_gva = 0; struct kvm_regs regs; @@ -115,7 +114,7 @@ int main(int argc, char *argv[]) vcpu_set_msr(vm, VCPU_ID, MSR_IA32_SMBASE, SMRAM_GPA); if (kvm_check_cap(KVM_CAP_NESTED_STATE)) { - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); } else { printf("will skip SMM test with VMX enabled\n"); diff --git a/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c b/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c index 6edec6fd790b..97182b47b10c 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c @@ -39,8 +39,6 @@ static void l1_guest_code(struct vmx_pages *vmx_pages) { #define L2_GUEST_STACK_SIZE 64 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; - uint32_t control; - uintptr_t save_cr3; GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages)); GUEST_ASSERT(load_vmcs(vmx_pages)); @@ -55,7 +53,6 @@ static void l1_guest_code(struct vmx_pages *vmx_pages) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages; vm_vaddr_t vmx_pages_gva; struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); @@ -68,7 +65,7 @@ int main(int argc, char *argv[]) vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); /* Allocate VMX pages and shared descriptors (vmx_pages). */ - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); for (;;) { diff --git a/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c b/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c index 18fa64db0d7a..6d37a3173956 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c @@ -121,7 +121,7 @@ static void l1_guest_code(struct vmx_pages *vmx_pages) GUEST_DONE(); } -void report(int64_t val) +static void report(int64_t val) { printf("IA32_TSC_ADJUST is %ld (%lld * TSC_ADJUST_VALUE + %lld).\n", val, val / TSC_ADJUST_VALUE, val % TSC_ADJUST_VALUE); @@ -129,7 +129,6 @@ void report(int64_t val) int main(int argc, char *argv[]) { - struct vmx_pages *vmx_pages; vm_vaddr_t vmx_pages_gva; struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1); @@ -142,7 +141,7 @@ int main(int argc, char *argv[]) vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); /* Allocate VMX pages and shared descriptors (vmx_pages). */ - vmx_pages = vcpu_alloc_vmx(vm, &vmx_pages_gva); + vcpu_alloc_vmx(vm, &vmx_pages_gva); vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); for (;;) { -- 2.21.0

6 years, 7 months

2
2
0 0

[GIT PULL] Kselftest second update for Linux 5.2-rc1

by Shuah Khan

Hi Linus, Please pull the following Kselftest update for Linux 5.2-rc1 This kselftest second update for Linux 5.2-rc1 consists of Kselftest framework fixes from Shuah Khan - kselftest framework bpf build/test workflow regression fix - Fix to kselftest install to use default install path - Fix to kselftest KBUILD_OUTPUT builds to not clutter main KBUILD_OUTPUT directory with selftest objects - .gitignore fixes from Kelsey Skunberg - rseq selftests updates from Mathieu Desnoyers and Martin Schwidefsky: They change the per-architecture pre-abort signatures to ensure those are valid trap instructions. The way exit points are presented to debuggers is enhanced, ensuring all exit points are present, so debuggers don't have to disassemble rseq critical section to properly skip over them. Discussions with the glibc community is reaching a consensus of exposing a __rseq_handled symbol from glibc to coexist with rseq early adopters. Update the rseq selftest code to expose and use this symbol. Support for compiling asm goto with clang is added with the "-no-integrated-as" compiler switch, similarly to the top level kernel Makefile. - kselftest Makefile test run output refactoring and making test output TAP13 compliant from Kees Cook: This re-factors the selftest Makefiles to extract the test running logic to be reused between "run_tests" and "emit_tests", while also fixing up the test output to be TAP version 13 compliant: - added "plan" line - fixed result line syntax - moved all test output to be "# "-prefixed as TAP "diagnostic" lines The prefixing code includes a fallback mode for limited execution environments. Additionally, the plan lines are fixed for all callers of kselftest.h. diff is attached. Also, there is a merge conflict with the following commit which went through the s390 maintainer tree and is now in your master which will require a minor fix-up. commit e24e4712efad737ca09ff299276737331cd021d9 Author: Martin Schwidefsky <schwidefsky(a)de.ibm.com> rseq/selftests: s390: use trap4 for RSEQ_SIG thanks, -- Shuah --------------------------------------------------------------- The following changes since commit d917fb876f6eaeeea8a2b620d2a266ce26372f4d: selftests: build and run gpio when output directory is the src dir (2019-04-22 17:02:26 -0600) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-5.2-rc1-2 for you to fetch changes up to 61c2018c0743fe0c9ca68e308b5727b8a7c3d544: selftests: avoid KBUILD_OUTPUT dir cluttering with selftest objects (2019-05-14 17:37:41 -0600) ---------------------------------------------------------------- linux-kselftest-5.2-rc1-2 This kselftest second update for Linux 5.2-rc1 consists of Kselftest framework fixes from Shuah Khan - kselftest framework bpf build/test workflow regression fix - Fix to kselftest install to use default install path - Fix to kselftest KBUILD_OUTPUT builds to not clutter main KBUILD_OUTPUT directory with selftest objects - .gitignore fixes from Kelsey Skunberg - rseq selftests updates from Mathieu Desnoyers and Martin Schwidefsky: They change the per-architecture pre-abort signatures to ensure those are valid trap instructions. The way exit points are presented to debuggers is enhanced, ensuring all exit points are present, so debuggers don't have to disassemble rseq critical section to properly skip over them. Discussions with the glibc community is reaching a consensus of exposing a __rseq_handled symbol from glibc to coexist with rseq early adopters. Update the rseq selftest code to expose and use this symbol. Support for compiling asm goto with clang is added with the "-no-integrated-as" compiler switch, similarly to the top level kernel Makefile. - kselftest Makefile test run output refactoring and making test output TAP13 compliant from Kees Cook: This re-factors the selftest Makefiles to extract the test running logic to be reused between "run_tests" and "emit_tests", while also fixing up the test output to be TAP version 13 compliant: - added "plan" line - fixed result line syntax - moved all test output to be "# "-prefixed as TAP "diagnostic" lines The prefixing code includes a fallback mode for limited execution environments. Additionally, the plan lines are fixed for all callers of kselftest.h. ---------------------------------------------------------------- Kees Cook (8): selftests: Extract single-test shell logic from lib.mk selftests: Use runner.sh for emit targets selftests: Extract logic for multiple test runs selftests: Add plan line and fix result line syntax selftests: Distinguish between missing and non-executable selftests: Move test output to diagnostic lines selftests: Remove KSFT_TAP_LEVEL selftests: Add test plan API to kselftest.h and adjust callers Kelsey Skunberg (2): selftests: pidfd: Create .gitignore to include pidfd_test selftests: drivers: Create .gitignore to include /dma-buf/udmabuf Martin Schwidefsky (1): rseq/selftests: s390: use trap4 for RSEQ_SIG Mathieu Desnoyers (11): rseq/selftests: x86: Work-around bogus gcc-8 optimisation rseq/selftests: Add __rseq_exit_point_array section for debuggers rseq/selftests: Introduce __rseq_cs_ptr_array, rename __rseq_table to __rseq_cs rseq/selftests: Use __rseq_handled symbol to coexist with glibc rseq/selftests: s390: use jg instruction for jumps outside of the asm rseq/selftests: x86: use ud1 instruction as RSEQ_SIG opcode rseq/selftests: arm: use udf instruction for RSEQ_SIG rseq/selftests: aarch64 code signature: handle big-endian environment rseq/selftests: powerpc code signature: generate valid instructions rseq/selftests: mips: use break instruction for RSEQ_SIG rseq/selftests: add -no-integrated-as for clang Shuah Khan (3): selftests: fix install target to use default install path selftests: fix bpf build/test workflow regression when KBUILD_OUTPUT is set selftests: avoid KBUILD_OUTPUT dir cluttering with selftest objects tools/testing/selftests/.gitignore | 1 - tools/testing/selftests/Makefile | 39 +-- .../selftests/breakpoints/breakpoint_test.c | 15 +- .../selftests/breakpoints/breakpoint_test_arm64.c | 3 +- .../breakpoints/step_after_suspend_test.c | 8 + tools/testing/selftests/capabilities/test_execve.c | 6 +- tools/testing/selftests/drivers/.gitignore | 1 + .../selftests/futex/functional/futex_requeue_pi.c | 1 + .../functional/futex_requeue_pi_mismatched_ops.c | 1 + .../functional/futex_requeue_pi_signal_restart.c | 1 + .../functional/futex_wait_private_mapped_file.c | 1 + .../futex/functional/futex_wait_timeout.c | 1 + .../functional/futex_wait_uninitialized_heap.c | 1 + .../futex/functional/futex_wait_wouldblock.c | 1 + tools/testing/selftests/kselftest.h | 17 +- tools/testing/selftests/kselftest/prefix.pl | 23 ++ tools/testing/selftests/kselftest/runner.sh | 86 +++++++ tools/testing/selftests/lib.mk | 76 ++---- .../testing/selftests/membarrier/membarrier_test.c | 1 + tools/testing/selftests/pidfd/.gitignore | 1 + tools/testing/selftests/pidfd/pidfd_test.c | 1 + tools/testing/selftests/rseq/Makefile | 8 +- tools/testing/selftests/rseq/rseq-arm.h | 132 +++++++++-- tools/testing/selftests/rseq/rseq-arm64.h | 74 +++++- tools/testing/selftests/rseq/rseq-mips.h | 115 ++++++++- tools/testing/selftests/rseq/rseq-ppc.h | 90 ++++++- tools/testing/selftests/rseq/rseq-s390.h | 78 +++++- tools/testing/selftests/rseq/rseq-x86.h | 264 ++++++++++++++------- tools/testing/selftests/rseq/rseq.c | 55 ++++- tools/testing/selftests/rseq/rseq.h | 1 + tools/testing/selftests/sigaltstack/sas.c | 1 + tools/testing/selftests/sync/sync_test.c | 1 + 32 files changed, 883 insertions(+), 221 deletions(-) create mode 100644 tools/testing/selftests/drivers/.gitignore create mode 100755 tools/testing/selftests/kselftest/prefix.pl create mode 100644 tools/testing/selftests/kselftest/runner.sh create mode 100644 tools/testing/selftests/pidfd/.gitignore ---------------------------------------------------------------

6 years, 7 months

2
1
0 0

[PATCH] selftests: fix bpf build/test workflow regression when KBUILD_OUTPUT is set

by Shuah Khan

commit 8ce72dc32578 ("selftests: fix headers_install circular dependency") broke bpf build/test workflow. When KBUILD_OUTPUT is set, bpf objects end up in KBUILD_OUTPUT build directory instead of in ../selftests/bpf. The following bpf workflow breaks when it can't find the test_verifier: cd tools/testing/selftests/bpf; make; ./test_verifier; Fix it to set OUTPUT only when it is undefined in lib.mk. It didn't need to be set in the first place. Fixes: commit 8ce72dc32578 ("selftests: fix headers_install circular dependency") Reported-by: Alexei Starovoitov <alexei.starovoitov(a)gmail.com> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/lib.mk | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index 098dd0065fb1..077337195783 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -3,15 +3,9 @@ CC := $(CROSS_COMPILE)gcc ifeq (0,$(MAKELEVEL)) - ifneq ($(O),) - OUTPUT := $(O) - else - ifneq ($(KBUILD_OUTPUT),) - OUTPUT := $(KBUILD_OUTPUT) - else - OUTPUT := $(shell pwd) - DEFAULT_INSTALL_HDR_PATH := 1 - endif + ifeq ($(OUTPUT),) + OUTPUT := $(shell pwd) + DEFAULT_INSTALL_HDR_PATH := 1 endif endif selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST)))) -- 2.17.1

6 years, 7 months

2
3
0 0

[PATCH bpf-next v2 0/2] Move bpf_printk to bpf_helpers.h

by Michal Rostecki

This series of patches move the commonly used bpf_printk macro to bpf_helpers.h which is already included in all BPF programs which defined that macro on their own. v1->v2: - If HBM_DEBUG is not defined in hbm sample, undefine bpf_printk and set an empty macro for it. Michal Rostecki (2): selftests: bpf: Move bpf_printk to bpf_helpers.h samples: bpf: Do not define bpf_printk macro samples/bpf/hbm_kern.h | 11 ++--------- samples/bpf/tcp_basertt_kern.c | 7 ------- samples/bpf/tcp_bufs_kern.c | 7 ------- samples/bpf/tcp_clamp_kern.c | 7 ------- samples/bpf/tcp_cong_kern.c | 7 ------- samples/bpf/tcp_iw_kern.c | 7 ------- samples/bpf/tcp_rwnd_kern.c | 7 ------- samples/bpf/tcp_synrto_kern.c | 7 ------- samples/bpf/tcp_tos_reflect_kern.c | 7 ------- samples/bpf/xdp_sample_pkts_kern.c | 7 ------- tools/testing/selftests/bpf/bpf_helpers.h | 8 ++++++++ .../testing/selftests/bpf/progs/sockmap_parse_prog.c | 7 ------- .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 7 ------- .../selftests/bpf/progs/sockmap_verdict_prog.c | 7 ------- .../testing/selftests/bpf/progs/test_lwt_seg6local.c | 7 ------- tools/testing/selftests/bpf/progs/test_xdp_noinline.c | 7 ------- tools/testing/selftests/bpf/test_sockmap_kern.h | 7 ------- 17 files changed, 10 insertions(+), 114 deletions(-) -- 2.21.0

6 years, 7 months

1
2
0 0

[PATCH 1/2] pid: add pidfd_open()

by Christian Brauner

This adds the pidfd_open() syscall. It allows a caller to retrieve pollable pidfds for a process which did not get created via CLONE_PIDFD, i.e. for a process that is created via traditional fork()/clone() calls that is only referenced by a PID: int pidfd = pidfd_open(1234, 0); ret = pidfd_send_signal(pidfd, SIGSTOP, NULL, 0); With the introduction of pidfds through CLONE_PIDFD it is possible to created pidfds at process creation time. However, a lot of processes get created with traditional PID-based calls such as fork() or clone() (without CLONE_PIDFD). For these processes a caller can currently not create a pollable pidfd. This is a huge problem for Android's low memory killer (LMK) and service managers such as systemd. Both are examples of tools that want to make use of pidfds to get reliable notification of process exit for non-parents (pidfd polling) and race-free signal sending (pidfd_send_signal()). They intend to switch to this API for process supervision/management as soon as possible. Having no way to get pollable pidfds from PID-only processes is one of the biggest blockers for them in adopting this api. With pidfd_open() making it possible to retrieve pidfd for PID-based processes we enable them to adopt this api. In line with Arnd's recent changes to consolidate syscall numbers across architectures, I have added the pidfd_open() syscall to all architectures at the same time. Signed-off-by: Christian Brauner <christian(a)brauner.io> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: "Eric W. Biederman" <ebiederm(a)xmission.com> Cc: Kees Cook <keescook(a)chromium.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Jann Horn <jannh(a)google.com> Cc: David Howells <dhowells(a)redhat.com> Cc: Andy Lutomirsky <luto(a)kernel.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: Aleksa Sarai <cyphar(a)cyphar.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: linux-api(a)vger.kernel.org --- arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + include/linux/pid.h | 1 + include/linux/syscalls.h | 1 + include/uapi/asm-generic/unistd.h | 4 +- kernel/fork.c | 2 +- kernel/pid.c | 48 +++++++++++++++++++++ 19 files changed, 69 insertions(+), 2 deletions(-) diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl index 165f268beafc..ddc3c93ad7a7 100644 --- a/arch/alpha/kernel/syscalls/syscall.tbl +++ b/arch/alpha/kernel/syscalls/syscall.tbl @@ -467,3 +467,4 @@ 535 common io_uring_setup sys_io_uring_setup 536 common io_uring_enter sys_io_uring_enter 537 common io_uring_register sys_io_uring_register +538 common pidfd_open sys_pidfd_open diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index 23f1a44acada..350e2049b4a9 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -874,6 +874,8 @@ __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup) __SYSCALL(__NR_io_uring_enter, sys_io_uring_enter) #define __NR_io_uring_register 427 __SYSCALL(__NR_io_uring_register, sys_io_uring_register) +#define __NR_pidfd_open 428 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) /* * Please add new compat syscalls above this comment and update diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl index 56e3d0b685e1..7115f6dd347a 100644 --- a/arch/ia64/kernel/syscalls/syscall.tbl +++ b/arch/ia64/kernel/syscalls/syscall.tbl @@ -348,3 +348,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl index df4ec3ec71d1..44bf12b16ffe 100644 --- a/arch/m68k/kernel/syscalls/syscall.tbl +++ b/arch/m68k/kernel/syscalls/syscall.tbl @@ -427,3 +427,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index 4964947732af..0d32e5152dc0 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -433,3 +433,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 9392dfe33f97..726e107b3c9f 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -366,3 +366,4 @@ 425 n32 io_uring_setup sys_io_uring_setup 426 n32 io_uring_enter sys_io_uring_enter 427 n32 io_uring_register sys_io_uring_register +428 n32 pidfd_open sys_pidfd_open diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index fe8ca623add8..83b46b568d51 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -424,3 +424,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl index 00f5a63c8d9a..5294d04d7fa5 100644 --- a/arch/powerpc/kernel/syscalls/syscall.tbl +++ b/arch/powerpc/kernel/syscalls/syscall.tbl @@ -509,3 +509,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl index 061418f787c3..dcdb838adf49 100644 --- a/arch/s390/kernel/syscalls/syscall.tbl +++ b/arch/s390/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 425 common io_uring_setup sys_io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open sys_pidfd_open diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl index 480b057556ee..8e66edfbc521 100644 --- a/arch/sh/kernel/syscalls/syscall.tbl +++ b/arch/sh/kernel/syscalls/syscall.tbl @@ -430,3 +430,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl index a1dd24307b00..d6f3bc686939 100644 --- a/arch/sparc/kernel/syscalls/syscall.tbl +++ b/arch/sparc/kernel/syscalls/syscall.tbl @@ -473,3 +473,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index 4cd5f982b1e5..1af6b469160a 100644 --- a/arch/x86/entry/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl @@ -438,3 +438,4 @@ 425 i386 io_uring_setup sys_io_uring_setup __ia32_sys_io_uring_setup 426 i386 io_uring_enter sys_io_uring_enter __ia32_sys_io_uring_enter 427 i386 io_uring_register sys_io_uring_register __ia32_sys_io_uring_register +428 i386 pidfd_open sys_pidfd_open __ia32_sys_pidfd_open diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 64ca0d06259a..c18e6ebe3387 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -355,6 +355,7 @@ 425 common io_uring_setup __x64_sys_io_uring_setup 426 common io_uring_enter __x64_sys_io_uring_enter 427 common io_uring_register __x64_sys_io_uring_register +428 common pidfd_open __x64_sys_pidfd_open # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl index 30084eaf8422..21ee795f3003 100644 --- a/arch/xtensa/kernel/syscalls/syscall.tbl +++ b/arch/xtensa/kernel/syscalls/syscall.tbl @@ -398,3 +398,4 @@ 425 common io_uring_setup sys_io_uring_setup 426 common io_uring_enter sys_io_uring_enter 427 common io_uring_register sys_io_uring_register +428 common pidfd_open sys_pidfd_open diff --git a/include/linux/pid.h b/include/linux/pid.h index 3c8ef5a199ca..c938a92eab99 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -67,6 +67,7 @@ struct pid extern struct pid init_struct_pid; extern const struct file_operations pidfd_fops; +extern int pidfd_create(struct pid *pid); static inline struct pid *get_pid(struct pid *pid) { diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index e2870fe1be5b..989055e0b501 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -929,6 +929,7 @@ asmlinkage long sys_clock_adjtime32(clockid_t which_clock, struct old_timex32 __user *tx); asmlinkage long sys_syncfs(int fd); asmlinkage long sys_setns(int fd, int nstype); +asmlinkage long sys_pidfd_open(pid_t pid, unsigned int flags); asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags); asmlinkage long sys_process_vm_readv(pid_t pid, diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index dee7292e1df6..94a257a93d20 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -832,9 +832,11 @@ __SYSCALL(__NR_io_uring_setup, sys_io_uring_setup) __SYSCALL(__NR_io_uring_enter, sys_io_uring_enter) #define __NR_io_uring_register 427 __SYSCALL(__NR_io_uring_register, sys_io_uring_register) +#define __NR_pidfd_open 428 +__SYSCALL(__NR_pidfd_open, sys_pidfd_open) #undef __NR_syscalls -#define __NR_syscalls 428 +#define __NR_syscalls 429 /* * 32 bit systems traditionally used different diff --git a/kernel/fork.c b/kernel/fork.c index 737db1828437..980cc1d2b8d4 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1714,7 +1714,7 @@ const struct file_operations pidfd_fops = { * Return: On success, a cloexec pidfd is returned. * On error, a negative errno number will be returned. */ -static int pidfd_create(struct pid *pid) +int pidfd_create(struct pid *pid) { int fd; diff --git a/kernel/pid.c b/kernel/pid.c index 20881598bdfa..237d18d6ecb8 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -38,6 +38,7 @@ #include <linux/syscalls.h> #include <linux/proc_ns.h> #include <linux/proc_fs.h> +#include <linux/sched/signal.h> #include <linux/sched/task.h> #include <linux/idr.h> @@ -451,6 +452,53 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns) return idr_get_next(&ns->idr, &nr); } +/** + * pidfd_open() - Open new pid file descriptor. + * + * @pid: pid for which to retrieve a pidfd + * @flags: flags to pass + * + * This creates a new pid file descriptor with the O_CLOEXEC flag set for + * the process identified by @pid. Currently, the process identified by + * @pid must be a thread-group leader. This restriction currently exists + * for all aspects of pidfds including pidfd creation (CLONE_PIDFD cannot + * be used with CLONE_THREAD) and pidfd polling (only supports thread group + * leaders). + * + * Return: On success, a cloexec pidfd is returned. + * On error, a negative errno number will be returned. + */ +SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) +{ + int fd, ret; + struct pid *p; + struct task_struct *tsk; + + if (flags) + return -EINVAL; + + if (pid <= 0) + return -EINVAL; + + p = find_get_pid(pid); + if (!p) + return -ESRCH; + + rcu_read_lock(); + tsk = pid_task(p, PIDTYPE_PID); + if (!tsk) + ret = -ESRCH; + else if (unlikely(!thread_group_leader(tsk))) + ret = -EINVAL; + else + ret = 0; + rcu_read_unlock(); + + fd = ret ?: pidfd_create(p); + put_pid(p); + return fd; +} + void __init pid_idr_init(void) { /* Verify no one has done anything silly: */ -- 2.21.0

6 years, 7 months

7
17
0 0

[PATCH AUTOSEL 5.0 29/34] KVM: selftests: make hyperv_cpuid test pass on AMD

by Sasha Levin

From: Vitaly Kuznetsov <vkuznets(a)redhat.com> [ Upstream commit eba3afde1cea7dbd7881683232f2a85e2ed86bfe ] Enlightened VMCS is only supported on Intel CPUs but the test shouldn't fail completely. Signed-off-by: Vitaly Kuznetsov <vkuznets(a)redhat.com> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c index 264425f75806b..9a21e912097c4 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c @@ -141,7 +141,13 @@ int main(int argc, char *argv[]) free(hv_cpuid_entries); - vcpu_ioctl(vm, VCPU_ID, KVM_ENABLE_CAP, &enable_evmcs_cap); + rv = _vcpu_ioctl(vm, VCPU_ID, KVM_ENABLE_CAP, &enable_evmcs_cap); + + if (rv) { + fprintf(stderr, + "Enlightened VMCS is unsupported, skip related test\n"); + goto vm_free; + } hv_cpuid_entries = kvm_get_supported_hv_cpuid(vm); if (!hv_cpuid_entries) @@ -151,6 +157,7 @@ int main(int argc, char *argv[]) free(hv_cpuid_entries); +vm_free: kvm_vm_free(vm); return 0; -- 2.20.1

6 years, 7 months

1
0
0 0

[PATCH AUTOSEL 5.0 28/34] KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size

by Sasha Levin

From: Paolo Bonzini <pbonzini(a)redhat.com> [ Upstream commit 76d58e0f07ec203bbdfcaabd9a9fc10a5a3ed5ea ] If a memory slot's size is not a multiple of 64 pages (256K), then the KVM_CLEAR_DIRTY_LOG API is unusable: clearing the final 64 pages either requires the requested page range to go beyond memslot->npages, or requires log->num_pages to be unaligned, and kvm_clear_dirty_log_protect requires log->num_pages to be both in range and aligned. To allow this case, allow log->num_pages not to be a multiple of 64 if it ends exactly on the last page of the slot. Reported-by: Peter Xu <peterx(a)redhat.com> Fixes: 98938aa8edd6 ("KVM: validate userspace input in kvm_clear_dirty_log_protect()", 2019-01-02) Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- Documentation/virtual/kvm/api.txt | 5 +++-- tools/testing/selftests/kvm/dirty_log_test.c | 9 ++++++--- virt/kvm/kvm_main.c | 7 ++++--- 3 files changed, 13 insertions(+), 8 deletions(-) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index ba8927c0d45c4..a1b8e6d92298c 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -3790,8 +3790,9 @@ The ioctl clears the dirty status of pages in a memory slot, according to the bitmap that is passed in struct kvm_clear_dirty_log's dirty_bitmap field. Bit 0 of the bitmap corresponds to page "first_page" in the memory slot, and num_pages is the size in bits of the input bitmap. -Both first_page and num_pages must be a multiple of 64. For each bit -that is set in the input bitmap, the corresponding page is marked "clean" +first_page must be a multiple of 64; num_pages must also be a multiple of +64 unless first_page + num_pages is the size of the memory slot. For each +bit that is set in the input bitmap, the corresponding page is marked "clean" in KVM's dirty bitmap, and dirty tracking is re-enabled for that page (for example via write-protection, or by clearing the dirty bit in a page table entry). diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index 4715cfba20dce..93f99c6b7d79e 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -288,8 +288,11 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations, #endif max_gfn = (1ul << (guest_pa_bits - guest_page_shift)) - 1; guest_page_size = (1ul << guest_page_shift); - /* 1G of guest page sized pages */ - guest_num_pages = (1ul << (30 - guest_page_shift)); + /* + * A little more than 1G of guest page sized pages. Cover the + * case where the size is not aligned to 64 pages. + */ + guest_num_pages = (1ul << (30 - guest_page_shift)) + 3; host_page_size = getpagesize(); host_num_pages = (guest_num_pages * guest_page_size) / host_page_size + !!((guest_num_pages * guest_page_size) % host_page_size); @@ -359,7 +362,7 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations, kvm_vm_get_dirty_log(vm, TEST_MEM_SLOT_INDEX, bmap); #ifdef USE_CLEAR_DIRTY_LOG kvm_vm_clear_dirty_log(vm, TEST_MEM_SLOT_INDEX, bmap, 0, - DIV_ROUND_UP(host_num_pages, 64) * 64); + host_num_pages); #endif vm_dirty_log_verify(bmap); iteration++; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index b4f2d892a1d36..c9b102e65a3a7 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1241,7 +1241,7 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, if (as_id >= KVM_ADDRESS_SPACE_NUM || id >= KVM_USER_MEM_SLOTS) return -EINVAL; - if ((log->first_page & 63) || (log->num_pages & 63)) + if (log->first_page & 63) return -EINVAL; slots = __kvm_memslots(kvm, as_id); @@ -1254,8 +1254,9 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, n = kvm_dirty_bitmap_bytes(memslot); if (log->first_page > memslot->npages || - log->num_pages > memslot->npages - log->first_page) - return -EINVAL; + log->num_pages > memslot->npages - log->first_page || + (log->num_pages < memslot->npages - log->first_page && (log->num_pages & 63))) + return -EINVAL; *flush = false; dirty_bitmap_buffer = kvm_second_dirty_bitmap(memslot); -- 2.20.1

6 years, 7 months

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[PATCH] selftests: pidfd: Create .gitignore to include pidfd_test

by Kelsey Skunberg

Create /selftests/pidfd/.gitignore which holds the following file name created after compiling: - pidfd_test Signed-off-by: Kelsey Skunberg <skunberg.kelsey(a)gmail.com> --- tools/testing/selftests/pidfd/.gitignore | 1 + 1 file changed, 1 insertion(+) create mode 100644 tools/testing/selftests/pidfd/.gitignore diff --git a/tools/testing/selftests/pidfd/.gitignore b/tools/testing/selftests/pidfd/.gitignore new file mode 100644 index 000000000000..822a1e63d045 --- /dev/null +++ b/tools/testing/selftests/pidfd/.gitignore @@ -0,0 +1 @@ +pidfd_test -- 2.20.1

6 years, 7 months

2
2
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[PATCH v4 0/2] kheaders fixes for -rc

by Joel Fernandes (Google)

Linus, Greg, Masahiro, Here are some simple fixes for the kheaders feature. Please consider these patches for an rc release. They are based on Linus's master branch. The only difference between the last series [1] and this one is I squashed 1/3 and 3/3 and rebased. Thanks! [1] https://patchwork.kernel.org/cover/10939557/ Joel Fernandes (Google) (2): kheaders: Move from proc to sysfs kheaders: Do not regenerate archive if config is not changed init/Kconfig | 17 +++++---- kernel/Makefile | 4 +-- kernel/{gen_ikh_data.sh => gen_kheaders.sh} | 17 ++++++--- kernel/kheaders.c | 40 +++++++++------------ 4 files changed, 38 insertions(+), 40 deletions(-) rename kernel/{gen_ikh_data.sh => gen_kheaders.sh} (82%) -- 2.21.0.1020.gf2820cf01a-goog

6 years, 7 months

1
2
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[PATCH v3 00/18] kunit: introduce KUnit, the Linux kernel unit testing framework

by Brendan Higgins

## TLDR I mostly wanted to incorporate feedback I got over the last week and a half. Biggest things to look out for: - KUnit core now outputs results in TAP14. - Heavily reworked tools/testing/kunit/kunit.py - Changed how parsing works. - Added testing. - Greg, Logan, you might want to re-review this. - Added documentation on how to use KUnit on non-UML kernels. You can see the docs rendered here[1]. There is still some discussion going on on the [PATCH v2 00/17] thread, but I wanted to get some of these updates out before they got too stale (and too difficult for me to keep track of). I hope no one minds. ## Background This patch set proposes KUnit, a lightweight unit testing and mocking framework for the Linux kernel. Unlike Autotest and kselftest, KUnit is a true unit testing framework; it does not require installing the kernel on a test machine or in a VM (however, KUnit still allows you to run tests on test machines or in VMs if you want) and does not require tests to be written in userspace running on a host kernel. Additionally, KUnit is fast: From invocation to completion KUnit can run several dozen tests in under a second. Currently, the entire KUnit test suite for KUnit runs in under a second from the initial invocation (build time excluded). KUnit is heavily inspired by JUnit, Python's unittest.mock, and Googletest/Googlemock for C++. KUnit provides facilities for defining unit test cases, grouping related test cases into test suites, providing common infrastructure for running tests, mocking, spying, and much more. ## What's so special about unit testing? A unit test is supposed to test a single unit of code in isolation, hence the name. There should be no dependencies outside the control of the test; this means no external dependencies, which makes tests orders of magnitudes faster. Likewise, since there are no external dependencies, there are no hoops to jump through to run the tests. Additionally, this makes unit tests deterministic: a failing unit test always indicates a problem. Finally, because unit tests necessarily have finer granularity, they are able to test all code paths easily solving the classic problem of difficulty in exercising error handling code. ## Is KUnit trying to replace other testing frameworks for the kernel? No. Most existing tests for the Linux kernel are end-to-end tests, which have their place. A well tested system has lots of unit tests, a reasonable number of integration tests, and some end-to-end tests. KUnit is just trying to address the unit test space which is currently not being addressed. ## More information on KUnit There is a bunch of documentation near the end of this patch set that describes how to use KUnit and best practices for writing unit tests. For convenience I am hosting the compiled docs here[2]. Additionally for convenience, I have applied these patches to a branch[3]. The repo may be cloned with: git clone https://kunit.googlesource.com/linux This patchset is on the kunit/rfc/v5.1/v3 branch. ## Changes Since Last Version - Converted KUnit core to print test results in TAP14 format as suggested by Greg and Frank. - Heavily reworked tools/testing/kunit/kunit.py - Changed how parsing works. - Added testing. - Added documentation on how to use KUnit on non-UML kernels. You can see the docs rendered here[1]. - Added a new set of EXPECTs and ASSERTs for pointer comparison. - Removed more function indirection as suggested by Logan. - Added a new patch that adds `kunit_try_catch_throw` to objtool's noreturn list. - Fixed a number of minorish issues pointed out by Shuah, Masahiro, and kbuild bot. [1] https://google.github.io/kunit-docs/third_party/kernel/docs/usage.html#kuni… [2] https://google.github.io/kunit-docs/third_party/kernel/docs/ [3] https://kunit.googlesource.com/linux/+/kunit/rfc/v5.1/v3 -- 2.21.0.1020.gf2820cf01a-goog

6 years, 7 months

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[PATCH 1/3] kselftest/cgroup: fix unexcepted testing failure on test_memcontrol

by Alex Shi

The cgroup testing relys on the root cgroup's subtree_control setting, If the 'memory' controller isn't set, all test cases will be failed as following: $ sudo ./test_memcontrol not ok 1 test_memcg_subtree_control not ok 2 test_memcg_current ok 3 # skip test_memcg_min not ok 4 test_memcg_low not ok 5 test_memcg_high not ok 6 test_memcg_max not ok 7 test_memcg_oom_events ok 8 # skip test_memcg_swap_max not ok 9 test_memcg_sock not ok 10 test_memcg_oom_group_leaf_events not ok 11 test_memcg_oom_group_parent_events not ok 12 test_memcg_oom_group_score_events To correct this unexcepted failure, this patch write the 'memory' to subtree_control of root to get a right result. Signed-off-by: Alex Shi <alex.shi(a)linux.alibaba.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Roman Gushchin <guro(a)fb.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Mike Rapoport <rppt(a)linux.vnet.ibm.com> Cc: Jay Kamat <jgkamat(a)fb.com> Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org --- tools/testing/selftests/cgroup/test_memcontrol.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6f339882a6ca..73612d604a2a 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1205,6 +1205,10 @@ int main(int argc, char **argv) if (cg_read_strstr(root, "cgroup.controllers", "memory")) ksft_exit_skip("memory controller isn't available\n"); + if (cg_read_strstr(root, "cgroup.subtree_control", "memory")) + if (cg_write(root, "cgroup.subtree_control", "+memory")) + ksft_exit_skip("Failed to set root memory controller\n"); + for (i = 0; i < ARRAY_SIZE(tests); i++) { switch (tests[i].fn(root)) { case KSFT_PASS: -- 2.19.1.856.g8858448bb

6 years, 7 months

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[PATCH] selftests: drivers: Create .gitignore to include /dma-buf/udmabuf

by Kelsey Skunberg

Create /selftests/drivers/.gitignore which holds the following file name created after compiling: - /dma-buf/udmabuf Signed-off-by: Kelsey Skunberg <skunberg.kelsey(a)gmail.com> --- tools/testing/selftests/drivers/.gitignore | 1 + 1 file changed, 1 insertion(+) create mode 100644 tools/testing/selftests/drivers/.gitignore diff --git a/tools/testing/selftests/drivers/.gitignore b/tools/testing/selftests/drivers/.gitignore new file mode 100644 index 000000000000..f6aebcc27b76 --- /dev/null +++ b/tools/testing/selftests/drivers/.gitignore @@ -0,0 +1 @@ +/dma-buf/udmabuf -- 2.20.1

6 years, 7 months

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[PATCH] selftests: avoid KBUILD_OUTPUT dir cluttering with selftest objects

by Shuah Khan

Running "make kselftest" or building selftests when KBUILD_OUTPUT is set, will create selftest objects in the KBUILD_OUTPUT directory. This could be undesirable especially when user didn't intend to relocate selftest objects. Use KBUILD_OUTPUT/kselftest to create selftest objects instead of cluttering the main directory. Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/Makefile | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index c71a63b923d4..9781ca79794a 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -71,6 +71,9 @@ override LDFLAGS = override MAKEFLAGS = endif +# Append kselftest to KBUILD_OUTPUT to avoid cluttering +# KBUILD_OUTPUT with selftest objects and headers installed +# by selftests Makefile or lib.mk. ifneq ($(KBUILD_SRC),) override LDFLAGS = endif @@ -79,7 +82,7 @@ ifneq ($(O),) BUILD := $(O) else ifneq ($(KBUILD_OUTPUT),) - BUILD := $(KBUILD_OUTPUT) + BUILD := $(KBUILD_OUTPUT)/kselftest else BUILD := $(shell pwd) DEFAULT_INSTALL_HDR_PATH := 1 -- 2.17.1

6 years, 7 months

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next-20190510 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: a802303934b3bd4df6e2fc8bf2e4ebced1c37556 git describe: next-20190510 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190510 Regressions (compared to build next-20190509) ------------------------------------------------------------------------ No regressions Fixes (compared to build next-20190509) ------------------------------------------------------------------------ No fixes In total: ------------------------------------------------------------------------ Ran 12 total tests in the following environments and test suites. pass 11 fail 1 xfail 0 skip 0 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-519 * boot-lkft-kselftests-vsyscall-mode-native-master-519 * boot-lkft-kselftests-vsyscall-mode-none-master-519 Failures ------------------------------------------------------------------------ qemu_x86_64: qemu_arm64: qemu_i386: x15: qemu_arm: x86: i386: hi6220-hikey: juno-r2: dragonboard-410c: * boot-lkft-kselftests-master-519/dragonboard-410c Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

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[PATCH v2 1/2] Add polling support to pidfd

by Joel Fernandes (Google)

Android low memory killer (LMK) needs to know when a process dies once it is sent the kill signal. It does so by checking for the existence of /proc/pid which is both racy and slow. For example, if a PID is reused between when LMK sends a kill signal and checks for existence of the PID, since the wrong PID is now possibly checked for existence. This patch adds polling support to pidfd. Using the polling support, LMK will be able to get notified when a process exists in race-free and fast way, and allows the LMK to do other things (such as by polling on other fds) while awaiting the process being killed to die. For notification to polling processes, we follow the same existing mechanism in the kernel used when the parent of the task group is to be notified of a child's death (do_notify_parent). This is precisely when the tasks waiting on a poll of pidfd are also awakened in this patch. We have decided to include the waitqueue in struct pid for the following reasons: 1. The wait queue has to survive for the lifetime of the poll. Including it in task_struct would not be option in this case because the task can be reaped and destroyed before the poll returns. 2. By including the struct pid for the waitqueue means that during de_thread(), the new thread group leader automatically gets the new waitqueue/pid even though its task_struct is different. Appropriate test cases are added in the second patch to provide coverage of all the cases the patch is handling. Andy had a similar patch [1] in the past which was a good reference however this patch tries to handle different situations properly related to thread group existence, and how/where it notifies. And also solves other bugs (waitqueue lifetime). Daniel had a similar patch [2] recently which this patch supercedes. [1] https://lore.kernel.org/patchwork/patch/345098/ [2] https://lore.kernel.org/lkml/20181029175322.189042-1-dancol@google.com/ Cc: Andy Lutomirski <luto(a)amacapital.net> Cc: Steven Rostedt <rostedt(a)goodmis.org> Cc: Daniel Colascione <dancol(a)google.com> Cc: Christian Brauner <christian(a)brauner.io> Cc: Jann Horn <jannh(a)google.com> Cc: Tim Murray <timmurray(a)google.com> Cc: Jonathan Kowalski <bl0pbl33p(a)gmail.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: Kees Cook <keescook(a)chromium.org> Cc: David Howells <dhowells(a)redhat.com> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: kernel-team(a)android.com (Oleg improved the code by showing how to avoid tasklist_lock) Suggested-by: Oleg Nesterov <oleg(a)redhat.com> Co-developed-by: Daniel Colascione <dancol(a)google.com> Signed-off-by: Daniel Colascione <dancol(a)google.com> Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> --- v1 -> v2: * Restructure poll code to avoid tasklist_lock (Oleg) * use task_pid instead of get_pid_task in notify_pidfd (Oleg) * Added comments to code, commit message nits (Christian) * Test case nits/improvements (Christian) RFC -> v1: * Based on CLONE_PIDFD patches: https://lwn.net/Articles/786244/ * Updated selftests. * Renamed poll wake function to do_notify_pidfd. * Removed depending on EXIT flags * Removed POLLERR flag since semantics are controversial and we don't have usecases for it right now (later we can add if there's a need for it). include/linux/pid.h | 3 +++ kernel/fork.c | 29 +++++++++++++++++++++++++++++ kernel/pid.c | 2 ++ kernel/signal.c | 11 +++++++++++ 4 files changed, 45 insertions(+) diff --git a/include/linux/pid.h b/include/linux/pid.h index 3c8ef5a199ca..1484db6ca8d1 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -3,6 +3,7 @@ #define _LINUX_PID_H #include <linux/rculist.h> +#include <linux/wait.h> enum pid_type { @@ -60,6 +61,8 @@ struct pid unsigned int level; /* lists of tasks that use this pid */ struct hlist_head tasks[PIDTYPE_MAX]; + /* wait queue for pidfd notifications */ + wait_queue_head_t wait_pidfd; struct rcu_head rcu; struct upid numbers[1]; }; diff --git a/kernel/fork.c b/kernel/fork.c index 5525837ed80e..721f8c9d2921 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1685,8 +1685,37 @@ static void pidfd_show_fdinfo(struct seq_file *m, struct file *f) } #endif +/* + * Poll support for process exit notification. + */ +static unsigned int pidfd_poll(struct file *file, struct poll_table_struct *pts) +{ + struct task_struct *task; + struct pid *pid = file->private_data; + int poll_flags = 0; + + poll_wait(file, &pid->wait_pidfd, pts); + + rcu_read_lock(); + task = pid_task(pid, PIDTYPE_PID); + WARN_ON_ONCE(task && !thread_group_leader(task)); + + /* + * Inform pollers only when the whole thread group exits, if thread + * group leader exits before all other threads in the group, then + * poll(2) should block, similar to the wait(2) family. + */ + if (!task || (task->exit_state && thread_group_empty(task))) + poll_flags = POLLIN | POLLRDNORM; + rcu_read_unlock(); + + return poll_flags; +} + + const struct file_operations pidfd_fops = { .release = pidfd_release, + .poll = pidfd_poll, #ifdef CONFIG_PROC_FS .show_fdinfo = pidfd_show_fdinfo, #endif diff --git a/kernel/pid.c b/kernel/pid.c index 20881598bdfa..5c90c239242f 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -214,6 +214,8 @@ struct pid *alloc_pid(struct pid_namespace *ns) for (type = 0; type < PIDTYPE_MAX; ++type) INIT_HLIST_HEAD(&pid->tasks[type]); + init_waitqueue_head(&pid->wait_pidfd); + upid = pid->numbers + ns->level; spin_lock_irq(&pidmap_lock); if (!(ns->pid_allocated & PIDNS_ADDING)) diff --git a/kernel/signal.c b/kernel/signal.c index 1581140f2d99..a17fff073c3d 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1800,6 +1800,14 @@ int send_sigqueue(struct sigqueue *q, struct pid *pid, enum pid_type type) return ret; } +static void do_notify_pidfd(struct task_struct *task) +{ + struct pid *pid; + + pid = task_pid(task); + wake_up_all(&pid->wait_pidfd); +} + /* * Let a parent know about the death of a child. * For a stopped/continued status change, use do_notify_parent_cldstop instead. @@ -1823,6 +1831,9 @@ bool do_notify_parent(struct task_struct *tsk, int sig) BUG_ON(!tsk->ptrace && (tsk->group_leader != tsk || !thread_group_empty(tsk))); + /* Wake up all pidfd waiters */ + do_notify_pidfd(tsk); + if (sig != SIGCHLD) { /* * This is only possible if parent == real_parent. -- 2.21.0.593.g511ec345e18-goog

6 years, 7 months

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[PATCH v2] selftests: kvm: Add files generated when compiled to .gitignore

by Kelsey Skunberg

The following files are generated in /selftests/kvm/ after compiling and should be added to /selftests/kvm/.gitignore: - /x86_64/hyperv_cpuid - /x86_64/smm_test - /clear_dirty_log_test Signed-off-by: Kelsey Skunberg <skunberg.kelsey(a)gmail.com> --- Changes since v1: - Included /clear_dirty_log_test to .gitignore - Updated commit log to reflect file added tools/testing/selftests/kvm/.gitignore | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index 2689d1ea6d7a..391a19231618 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -6,4 +6,7 @@ /x86_64/vmx_close_while_nested_test /x86_64/vmx_tsc_adjust_test /x86_64/state_test +/x86_64/hyperv_cpuid +/x86_64/smm_test +/clear_dirty_log_test /dirty_log_test -- 2.20.1

6 years, 7 months

2
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selftests: bpf: test_sock: WARNING: workqueue.c:3030 __flush_work+0x3fc/0x470

by Naresh Kamboju

Do you see kernel WARNING while running bpf: test_sock test case ? This kernel warning is popping up continuously for ~725 times on all devices ( arm64, arm, x86_64 and i386). selftests: bpf: test_sock Test case: bind4 load with invalid access: src_ip6 .. [PASS] Test case: bind4 load with invalid access: mark .. [PASS] Test case: bind6 load with invalid access: src_ip4 .. [PASS] Test case: sock_create load with invalid access: src_port .. [PASS] Test case: sock_create load w/o expected_attach_type (compat mode) .. [PASS] Test case: sock_create load w/ expected_attach_type .. [PASS] Test case: attach type mismatch bind4 vs bind6 .. [PASS] Test case: attach type mismatch bind6 vs bind4 .. [PASS] Test case: attach type mismatch default vs bind4 .. [PASS] Test case: attach type mismatch bind6 vs sock_create .. [PASS] Test case: bind4 reject all .. [PASS] Test case: bind6 reject all .. [PASS] Test case: bind6 deny specific IP & port .. [PASS] Test case: bind4 allow specific IP & port .. [PASS] Test case: bind4 allow all .. [PASS] Test case: bind6 allow all .. [PASS] Summ[ 200.359313] WARNING: CPU: 1 PID: 3400 at /usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x3fc/0x470 [ 200.369390] Modules linked in: tun algif_hash af_alg x86_pkg_temp_thermal fuse [ 200.376621] CPU: 1 PID: 3400 Comm: kworker/1:156 Not tainted 5.1.0 #1 [ 200.383061] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 200.390455] Workqueue: events sk_psock_destroy_deferred [ 200.395679] RIP: 0010:__flush_work+0x3fc/0x470 [ 200.400123] Code: 03 00 31 c0 e9 a4 fe ff ff 41 8b 0c 24 49 8b 54 24 08 83 e1 08 49 0f ba 2c 24 03 80 c9 f0 e9 d0 fd ff ff 0f 0b e9 83 fe ff ff <0f> 0b 31 c0 e9 7a fe ff ff e8 e6 1f 06 00 84 c0 0f 85 fd fe ff ff [ 200.418859] RSP: 0018:ffffa5d68487bca0 EFLAGS: 00010246 [ 200.424079] RAX: 0000000000000000 RBX: ffff9abc19269468 RCX: 0000000000000006 [ 200.431200] RDX: 0000000000001b35 RSI: 0000000000000001 RDI: ffff9abc19269468 [ 200.438324] RBP: ffffa5d68487bd68 R08: 0000000000000000 R09: 0000000000000000 [ 200.445449] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9abc19269468 [ 200.452572] R13: 0000000000000001 R14: ffffa5d68487bd98 R15: ffffffffabe91000 [ 200.459696] FS: 0000000000000000(0000) GS:ffff9abc6f880000(0000) knlGS:0000000000000000 [ 200.467776] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 200.473521] CR2: 00007f6c3ebf3cb0 CR3: 00000001d920a006 CR4: 00000000003606e0 [ 200.480644] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 200.487768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 200.494891] Call Trace: [ 200.497338] ? get_work_pool+0x90/0x90 [ 200.501090] ? mark_held_locks+0x4d/0x80 [ 200.505015] ? __cancel_work_timer+0x11a/0x1d0 [ 200.509452] ? cancel_delayed_work_sync+0x13/0x20 [ 200.514151] ? lockdep_hardirqs_on+0xf6/0x190 [ 200.518509] ? __cancel_work_timer+0x11a/0x1d0 [ 200.522946] ? get_work_pool+0x90/0x90 [ 200.526691] __cancel_work_timer+0x134/0x1d0 [ 200.530965] cancel_delayed_work_sync+0x13/0x20 [ 200.535497] strp_done+0x1c/0x50 [ 200.538729] sk_psock_destroy_deferred+0x34/0x1c0 [ 200.543434] process_one_work+0x281/0x610 [ 200.547439] worker_thread+0x3c/0x3f0 [ 200.551105] kthread+0x12c/0x150 [ 200.554337] ? process_one_work+0x610/0x610 [ 200.558515] ? kthread_park+0x90/0x90 [ 200.562180] ret_from_fork+0x3a/0x50 [ 200.565762] irq event stamp: 2382 [ 200.569079] hardirqs last enabled at (2381): [<ffffffffabe9569a>] __cancel_work_timer+0x11a/0x1d0 [ 200.578030] hardirqs last disabled at (2382): [<ffffffffabe01b7b>] trace_hardirqs_off_thunk+0x1a/0x1c [ 200.587234] softirqs last enabled at (1806): [<fffffffface00334>] __do_softirq+0x334/0x445 [ 200.595573] softirqs last disabled at (1761): [<ffffffffabe76e70>] irq_exit+0xc0/0xd0 [ 200.603398] ---[ end trace 447ba7732b3f8640 ]--- Test full log link, https://qa-reports.linaro.org/lkft/linux-mainline-oe/build/v5.1-9822-g47782… Best regards Naresh Kamboju

6 years, 7 months

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next-20190513 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: 04c4b6775d34f12f196e056debed9e8718585342 git describe: next-20190513 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190513 Regressions (compared to build next-20190510) ------------------------------------------------------------------------ No regressions Fixes (compared to build next-20190510) ------------------------------------------------------------------------ No fixes In total: ------------------------------------------------------------------------ Ran 12 total tests in the following environments and test suites. pass 11 fail 1 xfail 0 skip 0 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-520 * boot-lkft-kselftests-vsyscall-mode-native-master-520 * boot-lkft-kselftests-vsyscall-mode-none-master-520 Failures ------------------------------------------------------------------------ qemu_i386: juno-r2: qemu_arm64: qemu_x86_64: hi6220-hikey: dragonboard-410c: * boot-lkft-kselftests-master-520/dragonboard-410c i386: x86: qemu_arm: x15: Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

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Re: [PATCH 2/4] x86/kprobes: Fix frame pointer annotations

by Josh Poimboeuf

On Wed, May 08, 2019 at 05:39:07PM +0200, Peter Zijlstra wrote: > On Wed, May 08, 2019 at 07:42:48AM -0500, Josh Poimboeuf wrote: > > On Wed, May 08, 2019 at 02:04:16PM +0200, Peter Zijlstra wrote: > > > > Do the x86_64 variants also want some ORC annotation? > > > > Maybe so. Though it looks like regs->ip isn't saved. The saved > > registers might need to be tweaked. I'll need to look into it. > > What all these sites do (and maybe we should look at unifying them > somehow) is turn a CALL frame (aka RET-IP) into an exception frame (aka > pt_regs). > > So regs->ip will be the return address (which is fixed up to be the CALL > address in the handler). But from what I can tell, trampoline_handler() hard-codes regs->ip to point to kretprobe_trampoline(), and the original return address is placed in regs->sp. Masami, is there a reason why regs->ip doesn't have the original return address and regs->sp doesn't have the original SP? I think that would help the unwinder understand things. -- Josh

6 years, 7 months

5
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[PATCH v2] selftests: bpf: Add files generated after build to .gitignore

by Kelsey Skunberg

The following files are generated after building /selftests/bpf/ and should be added to .gitignore: - libbpf.pc - libbpf.so.* Signed-off-by: Kelsey Skunberg <skunberg.kelsey(a)gmail.com> --- Change since v1: - Add libbpf.so.* in replace of libbpf.so.0 and libbpf.so.0.0.3 - Update commit log to reflect file change tools/testing/selftests/bpf/.gitignore | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore index 41e8a689aa77..a877803e4ba8 100644 --- a/tools/testing/selftests/bpf/.gitignore +++ b/tools/testing/selftests/bpf/.gitignore @@ -32,3 +32,5 @@ test_tcpnotify_user test_libbpf test_tcp_check_syncookie_user alu32 +libbpf.pc +libbpf.so.* -- 2.20.1

6 years, 7 months

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Build-time tests?

by Joe Lawrence

Hello kbuild, kselftest, I've been working on a patchset which adds an additional build script to the toolchain when compiling livepatches. There are a few kernel section features in which this script does not yet support, but can detect and abort when it encounters. To test this detection, I've written a small set of kernel modules that require such sections. A few questions: Is build-testing out of scope for kernel selftests? For expediency, it was really easy to spin out new lib/livepatch kernel modules. Does kbuild support the notion of expected failure? In this case, the build script returns a non-zero error and the build stops. Am I trying to fit a square peg in a round hole? I could easily keep these build tests in a private branch, but could they exist in a different format somewhere else in the tree? Suggestions welcome, -- Joe

6 years, 7 months

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[PATCH] selftests: bpf: Add files generated when compiled to .gitignore

by Kelsey Skunberg

The following files are generated when /selftests/bpf/ is compiled and should be added to .gitignore: - libbpf.pc - libbpf.so.0 - libbpf.so.0.0.3 Signed-off-by: Kelsey Skunberg <skunberg.kelsey(a)gmail.com> --- tools/testing/selftests/bpf/.gitignore | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore index 41e8a689aa77..ceb11f98fe4f 100644 --- a/tools/testing/selftests/bpf/.gitignore +++ b/tools/testing/selftests/bpf/.gitignore @@ -32,3 +32,6 @@ test_tcpnotify_user test_libbpf test_tcp_check_syncookie_user alu32 +libbpf.pc +libbpf.so.0 +libbpf.so.0.0.3 -- 2.20.1

6 years, 7 months

2
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[PATCH] selftests: kvm: Add files generated when compiled to .gitignore

by Kelsey Skunberg

The following files are generated in /selftests/kvm/ after compiling and should be added to /selftests/kvm/.gitignore: - /x86_64/hyperv_cpuid - /x86_64/smm_test Signed-off-by: Kelsey Skunberg <skunberg.kelsey(a)gmail.com> --- tools/testing/selftests/kvm/.gitignore | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index 2689d1ea6d7a..81e9cb775ab8 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -6,4 +6,6 @@ /x86_64/vmx_close_while_nested_test /x86_64/vmx_tsc_adjust_test /x86_64/state_test +/x86_64/hyperv_cpuid +/x86_64/smm_test /dirty_log_test -- 2.20.1

6 years, 7 months

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[PATCH 0/3] kheaders fixes for -rc

by Joel Fernandes (Google)

Linus, Greg, Masahiro, Here are some simple fixes for the kheaders feature. Please consider these patches for an rc release. They are based on Linus's master branch. Thanks! Joel Fernandes (Google) (3): kheaders: Move from proc to sysfs kheaders: Do not regenerate archive if config is not changed kheaders: Make it depend on sysfs init/Kconfig | 17 +++++---- kernel/Makefile | 4 +-- kernel/{gen_ikh_data.sh => gen_kheaders.sh} | 17 ++++++--- kernel/kheaders.c | 40 +++++++++------------ 4 files changed, 38 insertions(+), 40 deletions(-) rename kernel/{gen_ikh_data.sh => gen_kheaders.sh} (82%) -- 2.21.0.1020.gf2820cf01a-goog

6 years, 7 months

4
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[PATCH v11 0/7] ptrace: add PTRACE_GET_SYSCALL_INFO request

by Dmitry V. Levin

[Andrew, could you take this patchset into your tree, please? Besides the patch for hexagon, all patches in this series have Acked-by or Reviewed-by tags already. I have been waiting and pinging the hexagon maintainer since November without any visible effect. The last Acked-by from the hexagon maintainer in linux.git was in October and the last Signed-off-by was in July. Since that time not a single change affecting hexagon was able to attract attention of the hexagon maintainer, so I don't think it's worth waiting any longer.] PTRACE_GET_SYSCALL_INFO is a generic ptrace API that lets ptracer obtain details of the syscall the tracee is blocked in. There are two reasons for a special syscall-related ptrace request. Firstly, with the current ptrace API there are cases when ptracer cannot retrieve necessary information about syscalls. Some examples include: * The notorious int-0x80-from-64-bit-task issue. See [1] for details. In short, if a 64-bit task performs a syscall through int 0x80, its tracer has no reliable means to find out that the syscall was, in fact, a compat syscall, and misidentifies it. * Syscall-enter-stop and syscall-exit-stop look the same for the tracer. Common practice is to keep track of the sequence of ptrace-stops in order not to mix the two syscall-stops up. But it is not as simple as it looks; for example, strace had a (just recently fixed) long-standing bug where attaching strace to a tracee that is performing the execve system call led to the tracer identifying the following syscall-exit-stop as syscall-enter-stop, which messed up all the state tracking. * Since the introduction of commit 84d77d3f06e7e8dea057d10e8ec77ad71f721be3 ("ptrace: Don't allow accessing an undumpable mm"), both PTRACE_PEEKDATA and process_vm_readv become unavailable when the process dumpable flag is cleared. On such architectures as ia64 this results in all syscall arguments being unavailable for the tracer. Secondly, ptracers also have to support a lot of arch-specific code for obtaining information about the tracee. For some architectures, this requires a ptrace(PTRACE_PEEKUSER, ...) invocation for every syscall argument and return value. PTRACE_GET_SYSCALL_INFO returns the following structure: struct ptrace_syscall_info { __u8 op; /* PTRACE_SYSCALL_INFO_* */ __u32 arch __attribute__((__aligned__(sizeof(__u32)))); __u64 instruction_pointer; __u64 stack_pointer; union { struct { __u64 nr; __u64 args[6]; } entry; struct { __s64 rval; __u8 is_error; } exit; struct { __u64 nr; __u64 args[6]; __u32 ret_data; } seccomp; }; }; The structure was chosen according to [2], except for the following changes: * seccomp substructure was added as a superset of entry substructure; * the type of nr field was changed from int to __u64 because syscall numbers are, as a practical matter, 64 bits; * stack_pointer field was added along with instruction_pointer field since it is readily available and can save the tracer from extra PTRACE_GETREGS/PTRACE_GETREGSET calls; * arch is always initialized to aid with tracing system calls * such as execve(); * instruction_pointer and stack_pointer are always initialized so they could be easily obtained for non-syscall stops; * a boolean is_error field was added along with rval field, this way the tracer can more reliably distinguish a return value from an error value. strace has been ported to PTRACE_GET_SYSCALL_INFO. Starting with release 4.26, strace uses PTRACE_GET_SYSCALL_INFO API as the preferred mechanism of obtaining syscall information. [1] https://lore.kernel.org/lkml/CA+55aFzcSVmdDj9Lh_gdbz1OzHyEm6ZrGPBDAJnywm2LF… [2] https://lore.kernel.org/lkml/CAObL_7GM0n80N7J_DFw_eQyfLyzq+sf4y2AvsCCV88Tb3… --- Notes: v11: * Added more Acked-by. * Rebased back to mainline as the prerequisite syscall_get_arch patchset has already been merged via audit tree. v10: * Added more Acked-by. v9: * Rebased to linux-next again due to syscall_get_arguments() signature change. v8: * Moved syscall_get_arch() specific patches to a separate patchset which is now merged into audit/next tree. * Rebased to linux-next. * Moved ptrace_get_syscall_info code under #ifdef CONFIG_HAVE_ARCH_TRACEHOOK, narrowing down the set of architectures supported by this implementation back to those 19 that enable CONFIG_HAVE_ARCH_TRACEHOOK because I failed to get all syscall_get_*(), instruction_pointer(), and user_stack_pointer() functions implemented on some niche architectures. This leaves the following architectures out: alpha, h8300, m68k, microblaze, and unicore32. v7: * Rebased to v5.0-rc1. * 5 arch-specific preparatory patches out of 25 have been merged into v5.0-rc1 via arch trees. v6: * Added syscall_get_arguments and syscall_set_arguments wrappers to asm-generic/syscall.h, requested by Geert. * Changed PTRACE_GET_SYSCALL_INFO return code: do not take trailing paddings into account, use the end of the last field of the structure being written. * Changed struct ptrace_syscall_info: * remove .frame_pointer field, is is not needed and not portable; * make .arch field explicitly aligned, remove no longer needed padding before .arch field; * remove trailing pads, they are no longer needed. v5: * Merged separate series and patches into the single series. * Changed PTRACE_EVENTMSG_SYSCALL_{ENTRY,EXIT} values as requested by Oleg. * Changed struct ptrace_syscall_info: generalized instruction_pointer, stack_pointer, and frame_pointer fields by moving them from ptrace_syscall_info.{entry,seccomp} substructures to ptrace_syscall_info and initializing them for all stops. * Added PTRACE_SYSCALL_INFO_NONE, set it when not in a syscall stop, so e.g. "strace -i" could use PTRACE_SYSCALL_INFO_SECCOMP to obtain instruction_pointer when the tracee is in a signal stop. * Patched all remaining architectures to provide all necessary syscall_get_* functions. * Made available for all architectures: do not conditionalize on CONFIG_HAVE_ARCH_TRACEHOOK since all syscall_get_* functions are implemented on all architectures. * Added a test for PTRACE_GET_SYSCALL_INFO to selftests/ptrace. v4: * Revisited PTRACE_EVENT_SECCOMP support: do not introduce task_struct.ptrace_event, use child->last_siginfo->si_code instead. * Implemented PTRACE_SYSCALL_INFO_SECCOMP and ptrace_syscall_info.seccomp support along with PTRACE_SYSCALL_INFO_{ENTRY,EXIT} and ptrace_syscall_info.{entry,exit}. v3: * Changed struct ptrace_syscall_info. * Added PTRACE_EVENT_SECCOMP support by adding ptrace_event to task_struct. * Added proper defines for ptrace_syscall_info.op values. * Renamed PT_SYSCALL_IS_ENTERING and PT_SYSCALL_IS_EXITING to PTRACE_EVENTMSG_SYSCALL_ENTRY and PTRACE_EVENTMSG_SYSCALL_EXIT and moved them to uapi. v2: * Stopped using task->ptrace. * Replaced entry_info.is_compat with entry_info.arch, used syscall_get_arch(). * Used addr argument of sys_ptrace to get expected size of the struct; return full size of the struct. Dmitry V. Levin (6): nds32: fix asm/syscall.h # acked hexagon: define syscall_get_error() and syscall_get_return_value() # waiting for ack since November mips: define syscall_get_error() # acked parisc: define syscall_get_error() # acked powerpc: define syscall_get_error() # acked selftests/ptrace: add a test case for PTRACE_GET_SYSCALL_INFO # acked Elvira Khabirova (1): ptrace: add PTRACE_GET_SYSCALL_INFO request # reviewed arch/hexagon/include/asm/syscall.h | 14 + arch/mips/include/asm/syscall.h | 6 + arch/nds32/include/asm/syscall.h | 27 +- arch/parisc/include/asm/syscall.h | 7 + arch/powerpc/include/asm/syscall.h | 10 + include/linux/tracehook.h | 9 +- include/uapi/linux/ptrace.h | 35 +++ kernel/ptrace.c | 101 ++++++- tools/testing/selftests/ptrace/.gitignore | 1 + tools/testing/selftests/ptrace/Makefile | 2 +- .../selftests/ptrace/get_syscall_info.c | 271 ++++++++++++++++++ 11 files changed, 468 insertions(+), 15 deletions(-) create mode 100644 tools/testing/selftests/ptrace/get_syscall_info.c -- ldv

6 years, 7 months

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[PATCH] selftests/bpf: Fix compile warning in bpf selftest

by Alakesh Haloi

This fixes the following compile time warning flow_dissector_load.c: In function ‘detach_program’: flow_dissector_load.c:55:19: warning: format not a string literal and no format arguments [-Wformat-security] error(1, errno, command); ^~~~~~~ Signed-off-by: Alakesh Haloi <alakesh.haloi(a)gmail.com> --- tools/testing/selftests/bpf/flow_dissector_load.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/flow_dissector_load.c b/tools/testing/selftests/bpf/flow_dissector_load.c index 77cafa66d048..7136ab9ffa73 100644 --- a/tools/testing/selftests/bpf/flow_dissector_load.c +++ b/tools/testing/selftests/bpf/flow_dissector_load.c @@ -52,7 +52,7 @@ static void detach_program(void) sprintf(command, "rm -r %s", cfg_pin_path); ret = system(command); if (ret) - error(1, errno, command); + error(1, errno, "%s", command); } static void parse_opts(int argc, char **argv) -- 2.17.1

6 years, 7 months

2
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[PATCH v3] kheaders: Move from proc to sysfs

by Joel Fernandes (Google)

The kheaders archive consisting of the kernel headers used for compiling bpf programs is in /proc. However there is concern that moving it here will make it permanent. Let us move it to /sys/kernel as discussed [1]. [1] https://lore.kernel.org/patchwork/patch/1067310/#1265969 Suggested-by: Steven Rostedt <rostedt(a)goodmis.org> Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> --- This patch applies on top of the previous patch that was applied to the driver tree: https://lore.kernel.org/patchwork/patch/1067310/ v2->v3: Fixed sysfs file mode nit (Greg). v1->v2: Fixed some kconfig nits. init/Kconfig | 16 ++++----- kernel/Makefile | 4 +-- kernel/{gen_ikh_data.sh => gen_kheaders.sh} | 2 +- kernel/kheaders.c | 40 +++++++++------------ 4 files changed, 26 insertions(+), 36 deletions(-) rename kernel/{gen_ikh_data.sh => gen_kheaders.sh} (98%) diff --git a/init/Kconfig b/init/Kconfig index 26a364a95b57..c3661991b089 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -579,15 +579,13 @@ config IKCONFIG_PROC This option enables access to the kernel configuration file through /proc/config.gz. -config IKHEADERS_PROC - tristate "Enable kernel header artifacts through /proc/kheaders.tar.xz" - depends on PROC_FS - help - This option enables access to the kernel header and other artifacts that - are generated during the build process. These can be used to build eBPF - tracing programs, or similar programs. If you build the headers as a - module, a module called kheaders.ko is built which can be loaded on-demand - to get access to the headers. +config IKHEADERS + tristate "Enable kernel headers through /sys/kernel/kheaders.tar.xz" + help + This option enables access to the in-kernel headers that are generated during + the build process. These can be used to build eBPF tracing programs, + or similar programs. If you build the headers as a module, a module called + kheaders.ko is built which can be loaded on-demand to get access to headers. config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" diff --git a/kernel/Makefile b/kernel/Makefile index 12399614c350..b32a558fae2f 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -70,7 +70,7 @@ obj-$(CONFIG_UTS_NS) += utsname.o obj-$(CONFIG_USER_NS) += user_namespace.o obj-$(CONFIG_PID_NS) += pid_namespace.o obj-$(CONFIG_IKCONFIG) += configs.o -obj-$(CONFIG_IKHEADERS_PROC) += kheaders.o +obj-$(CONFIG_IKHEADERS) += kheaders.o obj-$(CONFIG_SMP) += stop_machine.o obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o obj-$(CONFIG_AUDIT) += audit.o auditfilter.o @@ -126,7 +126,7 @@ $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE $(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz -cmd_genikh = $(srctree)/kernel/gen_ikh_data.sh $@ +cmd_genikh = $(srctree)/kernel/gen_kheaders.sh $@ $(obj)/kheaders_data.tar.xz: FORCE $(call cmd,genikh) diff --git a/kernel/gen_ikh_data.sh b/kernel/gen_kheaders.sh similarity index 98% rename from kernel/gen_ikh_data.sh rename to kernel/gen_kheaders.sh index 591a94f7b387..581b83534587 100755 --- a/kernel/gen_ikh_data.sh +++ b/kernel/gen_kheaders.sh @@ -2,7 +2,7 @@ # SPDX-License-Identifier: GPL-2.0 # This script generates an archive consisting of kernel headers -# for CONFIG_IKHEADERS_PROC. +# for CONFIG_IKHEADERS. set -e spath="$(dirname "$(readlink -f "$0")")" kroot="$spath/.." diff --git a/kernel/kheaders.c b/kernel/kheaders.c index 70ae6052920d..8f69772af77b 100644 --- a/kernel/kheaders.c +++ b/kernel/kheaders.c @@ -8,9 +8,8 @@ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/proc_fs.h> +#include <linux/kobject.h> #include <linux/init.h> -#include <linux/uaccess.h> /* * Define kernel_headers_data and kernel_headers_data_end, within which the @@ -31,39 +30,32 @@ extern char kernel_headers_data; extern char kernel_headers_data_end; static ssize_t -ikheaders_read_current(struct file *file, char __user *buf, - size_t len, loff_t *offset) +ikheaders_read(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t len) { - return simple_read_from_buffer(buf, len, offset, - &kernel_headers_data, - &kernel_headers_data_end - - &kernel_headers_data); + memcpy(buf, &kernel_headers_data + off, len); + return len; } -static const struct file_operations ikheaders_file_ops = { - .read = ikheaders_read_current, - .llseek = default_llseek, +static struct bin_attribute kheaders_attr __ro_after_init = { + .attr = { + .name = "kheaders.tar.xz", + .mode = 0444, + }, + .read = &ikheaders_read, }; static int __init ikheaders_init(void) { - struct proc_dir_entry *entry; - - /* create the current headers file */ - entry = proc_create("kheaders.tar.xz", S_IRUGO, NULL, - &ikheaders_file_ops); - if (!entry) - return -ENOMEM; - - proc_set_size(entry, - &kernel_headers_data_end - - &kernel_headers_data); - return 0; + kheaders_attr.size = (&kernel_headers_data_end - + &kernel_headers_data); + return sysfs_create_bin_file(kernel_kobj, &kheaders_attr); } static void __exit ikheaders_cleanup(void) { - remove_proc_entry("kheaders.tar.xz", NULL); + sysfs_remove_bin_file(kernel_kobj, &kheaders_attr); } module_init(ikheaders_init); -- 2.21.0.1020.gf2820cf01a-goog

6 years, 7 months

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[PATCH] selftests/lkdtm: Add tests for LKDTM targets

by Kees Cook

This adds a basic framework for running all the "safe" lkdtm tests. Signed-off-by: Kees Cook <keescook(a)chromium.org> --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/lkdtm/Makefile | 11 ++++ tools/testing/selftests/lkdtm/config | 1 + tools/testing/selftests/lkdtm/run.sh | 86 +++++++++++++++++++++++++ tools/testing/selftests/lkdtm/tests.txt | 64 ++++++++++++++++++ 6 files changed, 164 insertions(+) create mode 100644 tools/testing/selftests/lkdtm/Makefile create mode 100644 tools/testing/selftests/lkdtm/config create mode 100755 tools/testing/selftests/lkdtm/run.sh create mode 100644 tools/testing/selftests/lkdtm/tests.txt diff --git a/MAINTAINERS b/MAINTAINERS index 2c2fce72e694..055f1a09b1da 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8977,6 +8977,7 @@ LINUX KERNEL DUMP TEST MODULE (LKDTM) M: Kees Cook <keescook(a)chromium.org> S: Maintained F: drivers/misc/lkdtm/* +F: tools/testing/selftests/lkdtm/* LINUX KERNEL MEMORY CONSISTENCY MODEL (LKMM) M: Alan Stern <stern(a)rowland.harvard.edu> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 971fc8428117..c2397baeb777 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -23,6 +23,7 @@ TARGETS += kcmp TARGETS += kvm TARGETS += lib TARGETS += livepatch +TARGETS += lkdtm TARGETS += membarrier TARGETS += memfd TARGETS += memory-hotplug diff --git a/tools/testing/selftests/lkdtm/Makefile b/tools/testing/selftests/lkdtm/Makefile new file mode 100644 index 000000000000..f322d281fd8e --- /dev/null +++ b/tools/testing/selftests/lkdtm/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for LKDTM regression tests + +include ../lib.mk + +# NOTE: $(OUTPUT) won't get default value if used before lib.mk +TEST_GEN_PROGS = $(patsubst %,$(OUTPUT)/%.sh,$(shell awk '{print $$1}' tests.txt | sed -e 's/\#//')) +all: $(TEST_GEN_PROGS) + +$(OUTPUT)/%: run.sh tests.txt + install -m 0744 run.sh $@ diff --git a/tools/testing/selftests/lkdtm/config b/tools/testing/selftests/lkdtm/config new file mode 100644 index 000000000000..d874990e442b --- /dev/null +++ b/tools/testing/selftests/lkdtm/config @@ -0,0 +1 @@ +CONFIG_LKDTM=y diff --git a/tools/testing/selftests/lkdtm/run.sh b/tools/testing/selftests/lkdtm/run.sh new file mode 100755 index 000000000000..117349bf78ca --- /dev/null +++ b/tools/testing/selftests/lkdtm/run.sh @@ -0,0 +1,86 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# This reads tests.txt for the list of LKDTM tests to invoke. Any marked +# with a leading "#" are skipped. The line after the test name is either +# the text to look for in dmesg for a "success", or the rationale for why +# a test is marked to be skipped. +# +set -e +TRIGGER=/sys/kernel/debug/provoke-crash/DIRECT + +# Verify we have LKDTM available in the kernel. +if [ ! -r $TRIGGER ] ; then + /sbin/modprobe -q lkdtm || true + if [ ! -r $TRIGGER ] ; then + echo "Cannot find $TRIGGER (missing CONFIG_LKDTM?)" + else + echo "Cannot write $TRIGGER (need to run as root?)" + fi + # Skip this test + exit 4 +fi + +# Figure out which test to run from our script name. +test=$(basename $0 .sh) +# Look up details about the test from master list of LKDTM tests. +line=$(egrep '^#?'"$test"'\b' tests.txt) +if [ -z "$line" ]; then + echo "Skipped: missing test '$test' in tests.txt" + exit 4 +fi +# Check that the test is known to LKDTM. +if ! egrep -q '^'"$test"'$' "$TRIGGER" ; then + echo "Skipped: test '$test' missing in $TRIGGER!" + exit 4 +fi + +# Extract notes/expected output from test list. +test=$(echo "$line" | cut -d" " -f1) +if echo "$line" | grep -q ' ' ; then + expect=$(echo "$line" | cut -d" " -f2-) +else + expect="" +fi + +# If the test is commented out, report a skip +if echo "$test" | grep -q '^#' ; then + test=$(echo "$test" | cut -c2-) + if [ -z "$expect" ]; then + expect="crashes entire system" + fi + echo "Skipping $test: $expect" + exit 4 +fi + +# If no expected output given, assume an Oops with back trace is success. +if [ -z "$expect" ]; then + expect="call trace:" +fi + +# Clear out dmesg for output reporting +dmesg -c >/dev/null + +# Prepare log for report checking +LOG=$(mktemp --tmpdir -t lkdtm-XXXXXX) +cleanup() { + rm -f "$LOG" +} +trap cleanup EXIT + +# Most shells yell about signals and we're expecting the "cat" process +# to usually be killed by the kernel. So we have to run it in a sub-shell +# and silence errors. +($SHELL -c 'cat <(echo '"$test"') >'"$TRIGGER" 2>/dev/null) || true + +# Record and dump the results +dmesg -c >"$LOG" +cat "$LOG" +# Check for expected output +if grep -qi "$expect" "$LOG" ; then + echo "$test: saw '$expect': ok" + exit 0 +else + echo "$test: missing '$expect': [FAIL]" + exit 1 +fi diff --git a/tools/testing/selftests/lkdtm/tests.txt b/tools/testing/selftests/lkdtm/tests.txt new file mode 100644 index 000000000000..59df8a23db45 --- /dev/null +++ b/tools/testing/selftests/lkdtm/tests.txt @@ -0,0 +1,64 @@ +#PANIC +BUG kernel BUG at +WARNING WARNING: +EXCEPTION BUG: unable to handle kernel +#LOOP Hangs the system +#EXHAUST_STACK Corrupts memory on failure +#CORRUPT_STACK Crashes entire system on success +#CORRUPT_STACK_STRONG Crashes entire system on success +CORRUPT_LIST_ADD list_add corruption +CORRUPT_LIST_DEL list_del corruption +CORRUPT_USER_DS Invalid address limit on user-mode return +STACK_GUARD_PAGE_LEADING +STACK_GUARD_PAGE_TRAILING +UNALIGNED_LOAD_STORE_WRITE +#OVERWRITE_ALLOCATION Corrupts memory on failure +#WRITE_AFTER_FREE Corrupts memory on failure +READ_AFTER_FREE +#WRITE_BUDDY_AFTER_FREE Corrupts memory on failure +READ_BUDDY_AFTER_FREE +#SOFTLOCKUP Hangs the system +#HARDLOCKUP Hangs the system +#SPINLOCKUP Hangs the system +#HUNG_TASK Hangs the system +EXEC_DATA +EXEC_STACK +EXEC_KMALLOC +EXEC_VMALLOC +EXEC_RODATA +EXEC_USERSPACE +EXEC_NULL +ACCESS_USERSPACE +ACCESS_NULL +WRITE_RO +WRITE_RO_AFTER_INIT +WRITE_KERN +REFCOUNT_INC_OVERFLOW +REFCOUNT_ADD_OVERFLOW +REFCOUNT_INC_NOT_ZERO_OVERFLOW +REFCOUNT_ADD_NOT_ZERO_OVERFLOW +REFCOUNT_DEC_ZERO +REFCOUNT_DEC_NEGATIVE Negative detected: saturated +REFCOUNT_DEC_AND_TEST_NEGATIVE Negative detected: saturated +REFCOUNT_SUB_AND_TEST_NEGATIVE Negative detected: saturated +REFCOUNT_INC_ZERO +REFCOUNT_ADD_ZERO +REFCOUNT_INC_SATURATED Saturation detected: still saturated +REFCOUNT_DEC_SATURATED Saturation detected: still saturated +REFCOUNT_ADD_SATURATED Saturation detected: still saturated +REFCOUNT_INC_NOT_ZERO_SATURATED +REFCOUNT_ADD_NOT_ZERO_SATURATED +REFCOUNT_DEC_AND_TEST_SATURATED Saturation detected: still saturated +REFCOUNT_SUB_AND_TEST_SATURATED Saturation detected: still saturated +#REFCOUNT_TIMING timing only +#ATOMIC_TIMING timing only +USERCOPY_HEAP_SIZE_TO +USERCOPY_HEAP_SIZE_FROM +USERCOPY_HEAP_WHITELIST_TO +USERCOPY_HEAP_WHITELIST_FROM +USERCOPY_STACK_FRAME_TO +USERCOPY_STACK_FRAME_FROM +USERCOPY_STACK_BEYOND +USERCOPY_KERNEL +USERCOPY_KERNEL_DS +STACKLEAK_ERASING OK: the rest of the thread stack is properly erased -- 2.17.1 -- Kees Cook

6 years, 7 months

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[PATCH linux-next v10 0/7] ptrace: add PTRACE_GET_SYSCALL_INFO request

by Dmitry V. Levin

[Andrew, could you take this patchset into your tree, please?] PTRACE_GET_SYSCALL_INFO is a generic ptrace API that lets ptracer obtain details of the syscall the tracee is blocked in. There are two reasons for a special syscall-related ptrace request. Firstly, with the current ptrace API there are cases when ptracer cannot retrieve necessary information about syscalls. Some examples include: * The notorious int-0x80-from-64-bit-task issue. See [1] for details. In short, if a 64-bit task performs a syscall through int 0x80, its tracer has no reliable means to find out that the syscall was, in fact, a compat syscall, and misidentifies it. * Syscall-enter-stop and syscall-exit-stop look the same for the tracer. Common practice is to keep track of the sequence of ptrace-stops in order not to mix the two syscall-stops up. But it is not as simple as it looks; for example, strace had a (just recently fixed) long-standing bug where attaching strace to a tracee that is performing the execve system call led to the tracer identifying the following syscall-exit-stop as syscall-enter-stop, which messed up all the state tracking. * Since the introduction of commit 84d77d3f06e7e8dea057d10e8ec77ad71f721be3 ("ptrace: Don't allow accessing an undumpable mm"), both PTRACE_PEEKDATA and process_vm_readv become unavailable when the process dumpable flag is cleared. On such architectures as ia64 this results in all syscall arguments being unavailable for the tracer. Secondly, ptracers also have to support a lot of arch-specific code for obtaining information about the tracee. For some architectures, this requires a ptrace(PTRACE_PEEKUSER, ...) invocation for every syscall argument and return value. PTRACE_GET_SYSCALL_INFO returns the following structure: struct ptrace_syscall_info { __u8 op; /* PTRACE_SYSCALL_INFO_* */ __u32 arch __attribute__((__aligned__(sizeof(__u32)))); __u64 instruction_pointer; __u64 stack_pointer; union { struct { __u64 nr; __u64 args[6]; } entry; struct { __s64 rval; __u8 is_error; } exit; struct { __u64 nr; __u64 args[6]; __u32 ret_data; } seccomp; }; }; The structure was chosen according to [2], except for the following changes: * seccomp substructure was added as a superset of entry substructure; * the type of nr field was changed from int to __u64 because syscall numbers are, as a practical matter, 64 bits; * stack_pointer field was added along with instruction_pointer field since it is readily available and can save the tracer from extra PTRACE_GETREGS/PTRACE_GETREGSET calls; * arch is always initialized to aid with tracing system calls * such as execve(); * instruction_pointer and stack_pointer are always initialized so they could be easily obtained for non-syscall stops; * a boolean is_error field was added along with rval field, this way the tracer can more reliably distinguish a return value from an error value. strace has been ported to PTRACE_GET_SYSCALL_INFO. Starting with release 4.26, strace uses PTRACE_GET_SYSCALL_INFO API as the preferred mechanism of obtaining syscall information. [1] https://lore.kernel.org/lkml/CA+55aFzcSVmdDj9Lh_gdbz1OzHyEm6ZrGPBDAJnywm2LF… [2] https://lore.kernel.org/lkml/CAObL_7GM0n80N7J_DFw_eQyfLyzq+sf4y2AvsCCV88Tb3… --- Notes: v10: added more Acked-by. v9: * Rebased to linux-next again due to syscall_get_arguments() signature change. v8: * Moved syscall_get_arch() specific patches to a separate patchset which is now merged into audit/next tree. * Rebased to linux-next. * Moved ptrace_get_syscall_info code under #ifdef CONFIG_HAVE_ARCH_TRACEHOOK, narrowing down the set of architectures supported by this implementation back to those 19 that enable CONFIG_HAVE_ARCH_TRACEHOOK because I failed to get all syscall_get_*(), instruction_pointer(), and user_stack_pointer() functions implemented on some niche architectures. This leaves the following architectures out: alpha, h8300, m68k, microblaze, and unicore32. v7: * Rebased to v5.0-rc1. * 5 arch-specific preparatory patches out of 25 have been merged into v5.0-rc1 via arch trees. v6: * Add syscall_get_arguments and syscall_set_arguments wrappers to asm-generic/syscall.h, requested by Geert. * Change PTRACE_GET_SYSCALL_INFO return code: do not take trailing paddings into account, use the end of the last field of the structure being written. * Change struct ptrace_syscall_info: * remove .frame_pointer field, is is not needed and not portable; * make .arch field explicitly aligned, remove no longer needed padding before .arch field; * remove trailing pads, they are no longer needed. v5: * Merge separate series and patches into the single series. * Change PTRACE_EVENTMSG_SYSCALL_{ENTRY,EXIT} values as requested by Oleg. * Change struct ptrace_syscall_info: generalize instruction_pointer, stack_pointer, and frame_pointer fields by moving them from ptrace_syscall_info.{entry,seccomp} substructures to ptrace_syscall_info and initializing them for all stops. * Add PTRACE_SYSCALL_INFO_NONE, set it when not in a syscall stop, so e.g. "strace -i" could use PTRACE_SYSCALL_INFO_SECCOMP to obtain instruction_pointer when the tracee is in a signal stop. * Patch all remaining architectures to provide all necessary syscall_get_* functions. * Make available for all architectures: do not conditionalize on CONFIG_HAVE_ARCH_TRACEHOOK since all syscall_get_* functions are implemented on all architectures. * Add a test for PTRACE_GET_SYSCALL_INFO to selftests/ptrace. v4: * Do not introduce task_struct.ptrace_event, use child->last_siginfo->si_code instead. * Implement PTRACE_SYSCALL_INFO_SECCOMP and ptrace_syscall_info.seccomp support along with PTRACE_SYSCALL_INFO_{ENTRY,EXIT} and ptrace_syscall_info.{entry,exit}. v3: * Change struct ptrace_syscall_info. * Support PTRACE_EVENT_SECCOMP by adding ptrace_event to task_struct. * Add proper defines for ptrace_syscall_info.op values. * Rename PT_SYSCALL_IS_ENTERING and PT_SYSCALL_IS_EXITING to PTRACE_EVENTMSG_SYSCALL_ENTRY and PTRACE_EVENTMSG_SYSCALL_EXIT * and move them to uapi. v2: * Do not use task->ptrace. * Replace entry_info.is_compat with entry_info.arch, use syscall_get_arch(). * Use addr argument of sys_ptrace to get expected size of the struct; return full size of the struct. Dmitry V. Levin (6): nds32: fix asm/syscall.h # acked hexagon: define syscall_get_error() and syscall_get_return_value() # waiting for ack since November mips: define syscall_get_error() # acked parisc: define syscall_get_error() # acked powerpc: define syscall_get_error() # waiting for ack since early December selftests/ptrace: add a test case for PTRACE_GET_SYSCALL_INFO # acked Elvira Khabirova (1): ptrace: add PTRACE_GET_SYSCALL_INFO request # reviewed arch/hexagon/include/asm/syscall.h | 14 + arch/mips/include/asm/syscall.h | 6 + arch/nds32/include/asm/syscall.h | 27 +- arch/parisc/include/asm/syscall.h | 7 + arch/powerpc/include/asm/syscall.h | 10 + include/linux/tracehook.h | 9 +- include/uapi/linux/ptrace.h | 35 +++ kernel/ptrace.c | 103 ++++++- tools/testing/selftests/ptrace/.gitignore | 1 + tools/testing/selftests/ptrace/Makefile | 2 +- .../selftests/ptrace/get_syscall_info.c | 271 ++++++++++++++++++ 11 files changed, 470 insertions(+), 15 deletions(-) create mode 100644 tools/testing/selftests/ptrace/get_syscall_info.c -- ldv

6 years, 7 months

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next-20190509 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: unknown git describe: next-20190509 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190509 Regressions (compared to build next-20190507) ------------------------------------------------------------------------ No regressions Fixes (compared to build next-20190507) ------------------------------------------------------------------------ No fixes In total: ------------------------------------------------------------------------ Ran 0 total tests in the following environments and test suites. pass 0 fail 0 xfail 0 skip 0 Environments -------------- - x15 - arm Test Suites ----------- Failures ------------------------------------------------------------------------ x15: Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

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[PATCH 0/4] x86: int3 fallout

by Peter Zijlstra

So the first 3 patches are cleanups and fixes and should probably just go in. The last patch however is the one Linus hates, it converts i386 to always have a complete pt_regs. Both Josh and me did a bunch of cleanups and the patch is now a net reduction in lines. I still think it is the right thing to do; it removes a whole lot of magic from the C code (and avoids future surprises), but if this cannot convince Linus, I'll not pursue this further.

6 years, 7 months

3
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[for-next][PATCH 03/13] ftrace/x86_64: Emulate call function while updating in breakpoint handler

by Steven Rostedt

From: Peter Zijlstra <peterz(a)infradead.org> Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… [ Live kernel patching is not implemented on x86_32, thus the emulate calls are only for x86_64. ] Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Changed to only implement emulated calls for x86_64 ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index ef49517f6bb2..bd553b3af22e 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -231,6 +232,7 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr, } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -259,6 +261,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func) unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -294,13 +298,28 @@ int ftrace_int3_handler(struct pt_regs *regs) if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; +#ifdef CONFIG_X86_64 + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } +#else + if (ftrace_location(ip) || is_ftrace_caller(ip)) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } +#endif - return 1; + return 0; } NOKPROBE_SYMBOL(ftrace_int3_handler); @@ -859,6 +878,8 @@ void arch_ftrace_update_trampoline(struct ftrace_ops *ops) func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -960,6 +981,7 @@ static int ftrace_mod_jmp(unsigned long ip, void *func) { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new); -- 2.20.1

6 years, 7 months

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[for-next][PATCH 02/13] x86_64: Allow breakpoints to emulate call instructions

by Steven Rostedt

From: Peter Zijlstra <peterz(a)infradead.org> In order to allow breakpoints to emulate call instructions, they need to push the return address onto the stack. The x86_64 int3 handler adds a small gap to allow the stack to grow some. Use this gap to add the return address to be able to emulate a call instruction at the breakpoint location. These helper functions are added: int3_emulate_jmp(): changes the location of the regs->ip to return there. (The next two are only for x86_64) int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Tested-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Nicolai Stange <nstange(a)suse.de> Reviewed-by: Masami Hiramatsu <mhiramat(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> [ Modified to only work for x86_64 and added comment to int3_emulate_push() ] Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- arch/x86/include/asm/text-patching.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/x86/include/asm/text-patching.h b/arch/x86/include/asm/text-patching.h index e85ff65c43c3..05861cc08787 100644 --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_regs *regs); extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +#ifdef CONFIG_X86_64 +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + /* + * The int3 handler in entry_64.S adds a gap between the + * stack where the break point happened, and the saving of + * pt_regs. We can extend the original stack because of + * this gap. See the idtentry macro's create_gap option. + */ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} +#endif + #endif /* _ASM_X86_TEXT_PATCHING_H */ -- 2.20.1

6 years, 7 months

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[RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions

by Steven Rostedt

From: Peter Zijlstra <peterz(a)infradead.org> In order to allow breakpoints to emulate call functions, they need to push the return address onto the stack. But because the breakpoint exception frame is added to the stack when the breakpoint is hit, there's no room to add the address onto the stack and return to the address of the emulated called funtion. To handle this, copy the exception frame on entry of the breakpoint handler and have leave a gap that can be used to add a return address to the stack frame and return from the breakpoint to the emulated called function, allowing for that called function to return back to the location after the breakpoint was placed. The helper functions were also added: int3_emulate_push(): to push the address onto the gap in the stack int3_emulate_jmp(): changes the location of the regs->ip to return there. int3_emulate_call(): push the return address and change regs->ip Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Signed-off-by: *** Need Peter Zijlstra's SoB here! *** Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- arch/x86/entry/entry_32.S | 11 +++++++++++ arch/x86/entry/entry_64.S | 14 ++++++++++++-- arch/x86/include/asm/text-patching.h | 20 ++++++++++++++++++++ 3 files changed, 43 insertions(+), 2 deletions(-) diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index d309f30cf7af..50bbf4035baf 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -1478,6 +1478,17 @@ ENTRY(int3) ASM_CLAC pushl $-1 # mark this as an int +#ifdef CONFIG_VM86 + testl $X86_EFLAGS_VM, PT_EFLAGS(%esp) + jnz .Lfrom_usermode_no_gap +#endif + testl $SEGMENT_RPL_MASK, PT_CS(%esp) + jnz .Lfrom_usermode_no_gap + .rept 6 + pushl 5*4(%esp) + .endr +.Lfrom_usermode_no_gap: + SAVE_ALL switch_stacks=1 ENCODE_FRAME_POINTER TRACE_IRQS_OFF diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 1f0efdb7b629..834ec1397dab 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -879,7 +879,7 @@ apicinterrupt IRQ_WORK_VECTOR irq_work_interrupt smp_irq_work_interrupt * @paranoid == 2 is special: the stub will never switch stacks. This is for * #DF: if the thread stack is somehow unusable, we'll still get a useful OOPS. */ -.macro idtentry sym do_sym has_error_code:req paranoid=0 shift_ist=-1 +.macro idtentry sym do_sym has_error_code:req paranoid=0 shift_ist=-1 create_gap=0 ENTRY(\sym) UNWIND_HINT_IRET_REGS offset=\has_error_code*8 @@ -899,6 +899,16 @@ ENTRY(\sym) jnz .Lfrom_usermode_switch_stack_\@ .endif + .if \create_gap == 1 + testb $3, CS-ORIG_RAX(%rsp) + jnz .Lfrom_usermode_no_gap_\@ + .rept 6 + pushq 5*8(%rsp) + .endr + UNWIND_HINT_IRET_REGS offset=8 +.Lfrom_usermode_no_gap_\@: + .endif + .if \paranoid call paranoid_entry .else @@ -1130,7 +1140,7 @@ apicinterrupt3 HYPERV_STIMER0_VECTOR \ #endif /* CONFIG_HYPERV */ idtentry debug do_debug has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK -idtentry int3 do_int3 has_error_code=0 +idtentry int3 do_int3 has_error_code=0 create_gap=1 idtentry stack_segment do_stack_segment has_error_code=1 #ifdef CONFIG_XEN_PV diff --git a/arch/x86/include/asm/text-patching.h b/arch/x86/include/asm/text-patching.h index e85ff65c43c3..ba275b6292db 100644 --- a/arch/x86/include/asm/text-patching.h +++ b/arch/x86/include/asm/text-patching.h @@ -39,4 +39,24 @@ extern int poke_int3_handler(struct pt_regs *regs); extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler); extern int after_bootmem; +static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val) +{ + regs->sp -= sizeof(unsigned long); + *(unsigned long *)regs->sp = val; +} + +static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip) +{ + regs->ip = ip; +} + +#define INT3_INSN_SIZE 1 +#define CALL_INSN_SIZE 5 + +static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func) +{ + int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE); + int3_emulate_jmp(regs, func); +} + #endif /* _ASM_X86_TEXT_PATCHING_H */ -- 2.20.1

6 years, 7 months

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[PATCH] selftests: fix install target to use default install path

by Shuah Khan

Install target fails when INSTALL_PATH is undefined. Fix install target to use "output_dir/install as the default install location. "output_dir" is either the root of selftests directory under kernel source tree or output directory specified by O= or KBUILD_OUTPUT. e.g: make -C tools/testing/selftests install <installs under tools/testing/selftests/install> make O=/tmp/kselftest -C tools/testing/selftests install <installs under /tmp/kselftest/install> export KBUILD_OUTPUT=/tmp/kselftest make -C tools/testing/selftests install <installs under /tmp/kselftest/install> In addition, add "all" target as dependency to "install" to build and install using a single command. Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/Makefile | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 9f05448e5e4b..c71a63b923d4 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -163,11 +163,17 @@ clean_hotplug: run_pstore_crash: make -C pstore run_crash -INSTALL_PATH ?= install +# Use $BUILD as the default install root. $BUILD points to the +# right output location for the following cases: +# 1. output_dir=kernel_src +# 2. a separate output directory is specified using O= KBUILD_OUTPUT +# 3. a separate output directory is specified using KBUILD_OUTPUT +# +INSTALL_PATH ?= $(BUILD)/install INSTALL_PATH := $(abspath $(INSTALL_PATH)) ALL_SCRIPT := $(INSTALL_PATH)/run_kselftest.sh -install: +install: all ifdef INSTALL_PATH @# Ask all targets to install their files mkdir -p $(INSTALL_PATH)/kselftest -- 2.17.1

6 years, 7 months

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[PATCH net-next] net: sched: Introduce act_ctinfo action

by Kevin 'ldir' Darbyshire-Bryant

ctinfo is a new tc filter action module. It is designed to restore DSCPs stored in conntrack marks into the ipv4/v6 diffserv field. The feature is intended for use and has been found useful for restoring ingress classifications based on egress classifications across links that bleach or otherwise change DSCP, typically home ISP Internet links. Restoring DSCP on ingress on the WAN link allows qdiscs such as CAKE to shape inbound packets according to policies that are easier to indicate on egress. Ingress classification is traditionally a challenging task since iptables rules haven't yet run and tc filter/eBPF programs are pre-NAT lookups, hence are unable to see internal IPv4 addresses as used on the typical home masquerading gateway. ctinfo understands the following parameters: dscp dscpmask[/statemask] dscpmask - a 32 bit mask of at least 6 contiguous bits and indicates where ctinfo will find the DSCP bits stored in the conntrack mark. statemask - a 32 bit mask of (usually) 1 bit length, outside the area specified by dscpmask. This represents a conditional operation flag whereby the DSCP is only restored if the flag is set. This is useful to implement a 'one shot' iptables based classification where the 'complicated' iptables rules are only run once to classify the connection on initial (egress) packet and subsequent packets are all marked/restored with the same DSCP. A mask of zero disables the conditional behaviour ie. the conntrack mark DSCP bits are always restored to the ip diffserv field (assuming the conntrack entry is found & the skb is an ipv4/ipv6 type) optional parameters: zone - conntrack zone control - action related control (reclassify | pipe | drop | continue | ok | goto chain <CHAIN_INDEX>) e.g. dscp 0xfc000000/0x01000000 |----0xFC----conntrack mark----000000---| | Bits 31-26 | bit 25 | bit24 |~~~ Bit 0| | DSCP | unused | flag |unused | |-----------------------0x01---000000---| | | | | ---| Conditional flag v only restore if set |-ip diffserv-| | 6 bits | |-------------| Signed-off-by: Kevin Darbyshire-Bryant <ldir(a)darbyshire-bryant.me.uk> --- include/net/tc_act/tc_ctinfo.h | 24 ++ include/uapi/linux/pkt_cls.h | 1 + include/uapi/linux/tc_act/tc_ctinfo.h | 33 ++ net/sched/Kconfig | 13 + net/sched/Makefile | 1 + net/sched/act_ctinfo.c | 375 ++++++++++++++++++++++ tools/testing/selftests/tc-testing/config | 1 + 7 files changed, 448 insertions(+) create mode 100644 include/net/tc_act/tc_ctinfo.h create mode 100644 include/uapi/linux/tc_act/tc_ctinfo.h create mode 100644 net/sched/act_ctinfo.c diff --git a/include/net/tc_act/tc_ctinfo.h b/include/net/tc_act/tc_ctinfo.h new file mode 100644 index 000000000000..bb33e66d3ea5 --- /dev/null +++ b/include/net/tc_act/tc_ctinfo.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __NET_TC_CTINFO_H +#define __NET_TC_CTINFO_H + +#include <net/act_api.h> + +struct tcf_ctinfo_params { + struct net *net; + u32 dscpmask; + u32 dscpstatemask; + u16 zone; + u8 mode; + u8 dscpmaskshift; + struct rcu_head rcu; +}; + +struct tcf_ctinfo { + struct tc_action common; + struct tcf_ctinfo_params __rcu *params; +}; + +#define to_ctinfo(a) ((struct tcf_ctinfo *)a) + +#endif /* __NET_TC_CTINFO_H */ diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h index 51a0496f78ea..a93680fc4bfa 100644 --- a/include/uapi/linux/pkt_cls.h +++ b/include/uapi/linux/pkt_cls.h @@ -105,6 +105,7 @@ enum tca_id { TCA_ID_IFE = TCA_ACT_IFE, TCA_ID_SAMPLE = TCA_ACT_SAMPLE, /* other actions go here */ + TCA_ID_CTINFO, __TCA_ID_MAX = 255 }; diff --git a/include/uapi/linux/tc_act/tc_ctinfo.h b/include/uapi/linux/tc_act/tc_ctinfo.h new file mode 100644 index 000000000000..b84902b5e3b1 --- /dev/null +++ b/include/uapi/linux/tc_act/tc_ctinfo.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef __UAPI_TC_CTINFO_H +#define __UAPI_TC_CTINFO_H + +#include <linux/types.h> +#include <linux/pkt_cls.h> + +struct tc_ctinfo { + tc_gen; +}; + +struct tc_ctinfo_dscp { + __u32 mask; + __u32 statemask; +}; + +enum { + TCA_CTINFO_UNSPEC, + TCA_CTINFO_ACT, + TCA_CTINFO_ZONE, + TCA_CTINFO_DSCP_PARMS, + TCA_CTINFO_MODE_DSCP, + TCA_CTINFO_TM, + TCA_CTINFO_PAD, + __TCA_CTINFO_MAX +}; +#define TCA_CTINFO_MAX (__TCA_CTINFO_MAX - 1) + +enum { + CTINFO_MODE_SETDSCP = BIT(0) +}; + +#endif diff --git a/net/sched/Kconfig b/net/sched/Kconfig index 5c02ad97ef23..5ac01c5ebae9 100644 --- a/net/sched/Kconfig +++ b/net/sched/Kconfig @@ -876,6 +876,19 @@ config NET_ACT_CONNMARK To compile this code as a module, choose M here: the module will be called act_connmark. +config NET_ACT_CTINFO + tristate "Netfilter Connmark to DSCP Retriever" + depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES + depends on NF_CONNTRACK && NF_CONNTRACK_MARK + help + Say Y here to allow transfer of a connmark stored DSCP into + ipv4/v6 diffserv + + If unsure, say N. + + To compile this code as a module, choose M here: the + module will be called act_ctinfo. + config NET_ACT_SKBMOD tristate "skb data modification action" depends on NET_CLS_ACT diff --git a/net/sched/Makefile b/net/sched/Makefile index 8a40431d7b5c..d54bfcbd7981 100644 --- a/net/sched/Makefile +++ b/net/sched/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_NET_ACT_CSUM) += act_csum.o obj-$(CONFIG_NET_ACT_VLAN) += act_vlan.o obj-$(CONFIG_NET_ACT_BPF) += act_bpf.o obj-$(CONFIG_NET_ACT_CONNMARK) += act_connmark.o +obj-$(CONFIG_NET_ACT_CTINFO) += act_ctinfo.o obj-$(CONFIG_NET_ACT_SKBMOD) += act_skbmod.o obj-$(CONFIG_NET_ACT_IFE) += act_ife.o obj-$(CONFIG_NET_IFE_SKBMARK) += act_meta_mark.o diff --git a/net/sched/act_ctinfo.c b/net/sched/act_ctinfo.c new file mode 100644 index 000000000000..01a8694651ea --- /dev/null +++ b/net/sched/act_ctinfo.c @@ -0,0 +1,375 @@ +// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note +/* net/sched/act_ctinfo.c netfilter ctinfo connmark->DSCP action + * + * Copyright (c) 2019 Kevin Darbyshire-Bryant <ldir(a)darbyshire-bryant.me.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/skbuff.h> +#include <linux/rtnetlink.h> +#include <linux/pkt_cls.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <net/netlink.h> +#include <net/pkt_sched.h> +#include <net/act_api.h> +#include <net/pkt_cls.h> +#include <uapi/linux/tc_act/tc_ctinfo.h> +#include <net/tc_act/tc_ctinfo.h> + +#include <net/netfilter/nf_conntrack.h> +#include <net/netfilter/nf_conntrack_core.h> +#include <net/netfilter/nf_conntrack_ecache.h> +#include <net/netfilter/nf_conntrack_zones.h> + +static unsigned int ctinfo_net_id; +static struct tc_action_ops act_ctinfo_ops; + +static void tcf_ctinfo_dscp_set(struct nf_conn *ct, struct tcf_ctinfo *ca, + struct tcf_ctinfo_params *cp, + struct sk_buff *skb, int wlen, int proto) +{ + u8 dscp, newdscp; + + newdscp = (((ct->mark & cp->dscpmask) >> cp->dscpmaskshift) << 2) & + ~INET_ECN_MASK; + + /* mark contains DSCP so restore DSCP bits from c->mark into diffserv */ + /* using overlimits stats to count how many DSCP updates */ + switch (proto) { + case NFPROTO_IPV4: + dscp = ipv4_get_dsfield(ip_hdr(skb)) & ~INET_ECN_MASK; + if (dscp != newdscp) { + if (!skb_try_make_writable(skb, wlen)) { + ipv4_change_dsfield(ip_hdr(skb), + INET_ECN_MASK, + newdscp); + ca->tcf_qstats.overlimits++; + } else { + ca->tcf_qstats.drops++; + } + } + break; + case NFPROTO_IPV6: + dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & ~INET_ECN_MASK; + if (dscp != newdscp) { + if (!skb_try_make_writable(skb, wlen)) { + ipv6_change_dsfield(ipv6_hdr(skb), + INET_ECN_MASK, + newdscp); + ca->tcf_qstats.overlimits++; + } else { + ca->tcf_qstats.drops++; + } + } + break; + default: + break; + } +} + +static int tcf_ctinfo_act(struct sk_buff *skb, const struct tc_action *a, + struct tcf_result *res) +{ + const struct nf_conntrack_tuple_hash *thash = NULL; + struct nf_conntrack_tuple tuple; + enum ip_conntrack_info ctinfo; + struct tcf_ctinfo *ca = to_ctinfo(a); + struct tcf_ctinfo_params *cp; + struct nf_conntrack_zone zone; + struct nf_conn *ct; + int proto, wlen; + int action; + + cp = rcu_dereference_bh(ca->params); + + tcf_lastuse_update(&ca->tcf_tm); + bstats_update(&ca->tcf_bstats, skb); + action = READ_ONCE(ca->tcf_action); + + /* currently the only mode we know but in future...*/ + if (unlikely(!(cp->mode & CTINFO_MODE_SETDSCP))) + goto out; + + wlen = skb_network_offset(skb); + if (tc_skb_protocol(skb) == htons(ETH_P_IP)) { + wlen += sizeof(struct iphdr); + if (!pskb_may_pull(skb, wlen)) + goto out; + + proto = NFPROTO_IPV4; + } else if (tc_skb_protocol(skb) == htons(ETH_P_IPV6)) { + wlen += sizeof(struct ipv6hdr); + if (!pskb_may_pull(skb, wlen)) + goto out; + + proto = NFPROTO_IPV6; + } else { + goto out; + } + + ct = nf_ct_get(skb, &ctinfo); + if (!ct) { /* look harder usually ingress */ + if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb), + proto, cp->net, &tuple)) + goto out; + zone.id = cp->zone; + zone.dir = NF_CT_DEFAULT_ZONE_DIR; + + thash = nf_conntrack_find_get(cp->net, &zone, &tuple); + if (!thash) + goto out; + + ct = nf_ct_tuplehash_to_ctrack(thash); + } + + if (!cp->dscpstatemask || (ct->mark & cp->dscpstatemask)) + tcf_ctinfo_dscp_set(ct, ca, cp, skb, wlen, proto); + + if (thash) + nf_ct_put(ct); +out: + return action; +} + +static const struct nla_policy ctinfo_policy[TCA_CTINFO_MAX + 1] = { + [TCA_CTINFO_ACT] = { .len = sizeof(struct tc_ctinfo) }, + [TCA_CTINFO_ZONE] = { .type = NLA_U16 }, + [TCA_CTINFO_MODE_DSCP] = { .type = NLA_FLAG }, + [TCA_CTINFO_DSCP_PARMS] = { .len = sizeof(struct tc_ctinfo_dscp) }, +}; + +static int tcf_ctinfo_init(struct net *net, struct nlattr *nla, + struct nlattr *est, struct tc_action **a, + int ovr, int bind, bool rtnl_held, + struct tcf_proto *tp, + struct netlink_ext_ack *extack) +{ + struct tc_action_net *tn = net_generic(net, ctinfo_net_id); + struct tcf_ctinfo_params *cp_new; + struct nlattr *tb[TCA_CTINFO_MAX + 1]; + struct tcf_chain *goto_ch = NULL; + struct tcf_ctinfo *ci; + struct tc_ctinfo *actparm; + struct tc_ctinfo_dscp *dscpparm; + int ret = 0, err, i; + + if (!nla) + return -EINVAL; + + err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, NULL); + if (err < 0) + return err; + + if (!tb[TCA_CTINFO_ACT]) + return -EINVAL; + + if (tb[TCA_CTINFO_MODE_DSCP] && !tb[TCA_CTINFO_DSCP_PARMS]) + return -EINVAL; + + actparm = nla_data(tb[TCA_CTINFO_ACT]); + dscpparm = nla_data(tb[TCA_CTINFO_DSCP_PARMS]); + + if (dscpparm) { + /* need at least contiguous 6 bit mask */ + i = dscpparm->mask ? __ffs(dscpparm->mask) : 0; + if ((0x3f & (dscpparm->mask >> i)) != 0x3f) + return -EINVAL; + /* mask & statemask must not overlap */ + if (dscpparm->mask & dscpparm->statemask) + return -EINVAL; + } +//done the validation:now to the actual action allocation + err = tcf_idr_check_alloc(tn, &actparm->index, a, bind); + if (!err) { + ret = tcf_idr_create(tn, actparm->index, est, a, + &act_ctinfo_ops, bind, false); + if (ret) { + tcf_idr_cleanup(tn, actparm->index); + return ret; + } + } else if (err > 0) { + if (bind) /* don't override defaults */ + return 0; + if (!ovr) { + tcf_idr_release(*a, bind); + return -EEXIST; + } + } else { + return err; + } + + err = tcf_action_check_ctrlact(actparm->action, tp, &goto_ch, extack); + if (err < 0) + goto release_idr; + + ci = to_ctinfo(*a); + + cp_new = kzalloc(sizeof(*cp_new), GFP_KERNEL); + if (unlikely(!cp_new)) { + err = -ENOMEM; + goto put_chain; + } + + cp_new->net = net; + cp_new->zone = tb[TCA_CTINFO_ZONE] ? + nla_get_u16(tb[TCA_CTINFO_ZONE]) : 0; + if (dscpparm) { + cp_new->dscpmask = dscpparm->mask; + cp_new->dscpmaskshift = cp_new->dscpmask ? + __ffs(cp_new->dscpmask) : 0; + cp_new->dscpstatemask = dscpparm->statemask; + } + + if (tb[TCA_CTINFO_MODE_DSCP]) + cp_new->mode |= CTINFO_MODE_SETDSCP; + else + cp_new->mode &= ~CTINFO_MODE_SETDSCP; + + spin_lock_bh(&ci->tcf_lock); + goto_ch = tcf_action_set_ctrlact(*a, actparm->action, goto_ch); + rcu_swap_protected(ci->params, cp_new, + lockdep_is_held(&ci->tcf_lock)); + spin_unlock_bh(&ci->tcf_lock); + + if (goto_ch) + tcf_chain_put_by_act(goto_ch); + if (cp_new) + kfree_rcu(cp_new, rcu); + + if (ret == ACT_P_CREATED) + tcf_idr_insert(tn, *a); + + return ret; + +put_chain: + if (goto_ch) + tcf_chain_put_by_act(goto_ch); +release_idr: + tcf_idr_release(*a, bind); + return err; +} + +static inline int tcf_ctinfo_dump(struct sk_buff *skb, struct tc_action *a, + int bind, int ref) +{ + unsigned char *b = skb_tail_pointer(skb); + struct tcf_ctinfo *ci = to_ctinfo(a); + struct tcf_ctinfo_params *cp; + struct tc_ctinfo opt = { + .index = ci->tcf_index, + .refcnt = refcount_read(&ci->tcf_refcnt) - ref, + .bindcnt = atomic_read(&ci->tcf_bindcnt) - bind, + }; + struct tcf_t t; + struct tc_ctinfo_dscp dscpparm; + + spin_lock_bh(&ci->tcf_lock); + cp = rcu_dereference_protected(ci->params, + lockdep_is_held(&ci->tcf_lock)); + opt.action = ci->tcf_action; + + if (nla_put(skb, TCA_CTINFO_ACT, sizeof(opt), &opt)) + goto nla_put_failure; + + if (cp->mode & CTINFO_MODE_SETDSCP) { + dscpparm.mask = cp->dscpmask; + dscpparm.statemask = cp->dscpstatemask; + if (nla_put(skb, TCA_CTINFO_DSCP_PARMS, sizeof(dscpparm), + &dscpparm)) + goto nla_put_failure; + + if (nla_put_flag(skb, TCA_CTINFO_MODE_DSCP)) + goto nla_put_failure; + } + + if (cp->zone) { + if (nla_put_u16(skb, TCA_CTINFO_ZONE, cp->zone)) + goto nla_put_failure; + } + + tcf_tm_dump(&t, &ci->tcf_tm); + if (nla_put_64bit(skb, TCA_CTINFO_TM, sizeof(t), &t, + TCA_CTINFO_PAD)) + goto nla_put_failure; + + spin_unlock_bh(&ci->tcf_lock); + + return skb->len; + +nla_put_failure: + spin_unlock_bh(&ci->tcf_lock); + nlmsg_trim(skb, b); + return -1; +} + +static int tcf_ctinfo_walker(struct net *net, struct sk_buff *skb, + struct netlink_callback *cb, int type, + const struct tc_action_ops *ops, + struct netlink_ext_ack *extack) +{ + struct tc_action_net *tn = net_generic(net, ctinfo_net_id); + + return tcf_generic_walker(tn, skb, cb, type, ops, extack); +} + +static int tcf_ctinfo_search(struct net *net, struct tc_action **a, u32 index) +{ + struct tc_action_net *tn = net_generic(net, ctinfo_net_id); + + return tcf_idr_search(tn, a, index); +} + +static struct tc_action_ops act_ctinfo_ops = { + .kind = "ctinfo", + .id = TCA_ID_CTINFO, + .owner = THIS_MODULE, + .act = tcf_ctinfo_act, + .dump = tcf_ctinfo_dump, + .init = tcf_ctinfo_init, + .walk = tcf_ctinfo_walker, + .lookup = tcf_ctinfo_search, + .size = sizeof(struct tcf_ctinfo), +}; + +static __net_init int ctinfo_init_net(struct net *net) +{ + struct tc_action_net *tn = net_generic(net, ctinfo_net_id); + + return tc_action_net_init(tn, &act_ctinfo_ops); +} + +static void __net_exit ctinfo_exit_net(struct list_head *net_list) +{ + tc_action_net_exit(net_list, ctinfo_net_id); +} + +static struct pernet_operations ctinfo_net_ops = { + .init = ctinfo_init_net, + .exit_batch = ctinfo_exit_net, + .id = &ctinfo_net_id, + .size = sizeof(struct tc_action_net), +}; + +static int __init ctinfo_init_module(void) +{ + return tcf_register_action(&act_ctinfo_ops, &ctinfo_net_ops); +} + +static void __exit ctinfo_cleanup_module(void) +{ + tcf_unregister_action(&act_ctinfo_ops, &ctinfo_net_ops); +} + +module_init(ctinfo_init_module); +module_exit(ctinfo_cleanup_module); +MODULE_AUTHOR("Kevin Darbyshire-Bryant <ldir(a)darbyshire-bryant.me.uk>"); +MODULE_DESCRIPTION("Conntrack mark to DSCP restoring"); +MODULE_LICENSE("GPL"); diff --git a/tools/testing/selftests/tc-testing/config b/tools/testing/selftests/tc-testing/config index 203302065458..9d1fddcfb887 100644 --- a/tools/testing/selftests/tc-testing/config +++ b/tools/testing/selftests/tc-testing/config @@ -37,6 +37,7 @@ CONFIG_NET_ACT_SKBEDIT=m CONFIG_NET_ACT_CSUM=m CONFIG_NET_ACT_VLAN=m CONFIG_NET_ACT_BPF=m +CONFIG_NET_ACT_CONNDSCP=m CONFIG_NET_ACT_CONNMARK=m CONFIG_NET_ACT_SKBMOD=m CONFIG_NET_ACT_IFE=m -- 2.20.1 (Apple Git-117)

6 years, 7 months

5
12
0 0

[PATCH 0/3] x86_64/ftrace: Emulate calls from int3 when patching functions

by Steven Rostedt

[ This is the non-RFC version. It went through and passed all my tests. If there's no objections I'm going to include this in my pull request. I still have patches in my INBOX that may still be included, so I need to run those through my tests as well, so a pull request wont be immediate. ] Nicolai Stange discovered that Live Kernel Patching can have unforseen consequences if tracing is enabled when there are functions that are patched. The reason being, is that Live Kernel patching is built on top of ftrace, which will have the patched functions call the live kernel trampoline directly, and that trampoline will modify the regs->ip address to return to the patched function. But in the transition between changing the call to the customized trampoline, the tracing code is needed to have its handler called an well, so the function fentry location must be changed from calling the live kernel patching trampoline, to the ftrace_reg_caller trampoline which will iterate through all the registered ftrace handlers for that function. During this transition, a break point is added to do the live code modifications. But if that break point is hit, it just skips calling any handler, and makes the call site act as a nop. For tracing, the worse that can happen is that you miss a function being traced, but for live kernel patching the affects are more severe, as the old buggy function is now called. To solve this, an int3_emulate_call() is created for x86_64 to allow ftrace on x86_64 to emulate the call to ftrace_regs_caller() which will make sure all the registered handlers to that function are still called. And this keeps live kernel patching happy! To mimimize the changes, and to avoid controversial patches, this only changes x86_64. Due to the way x86_32 implements the regs->sp the complexity of emulating calls on that platform is too much for stable patches, and live kernel patching does not support x86_32 anyway. Josh Poimboeuf (1): x86_64: Add gap to int3 to allow for call emulation Peter Zijlstra (2): x86_64: Allow breakpoints to emulate call instructions ftrace/x86_64: Emulate call function while updating in breakpoint handler ---- arch/x86/entry/entry_64.S | 18 ++++++++++++++++-- arch/x86/include/asm/text-patching.h | 28 ++++++++++++++++++++++++++++ arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 3 files changed, 71 insertions(+), 7 deletions(-)

6 years, 7 months

3
6
0 0

next-20190508 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: unknown git describe: next-20190508 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190508 Regressions (compared to build next-20190507) ------------------------------------------------------------------------ No regressions Fixes (compared to build next-20190507) ------------------------------------------------------------------------ No fixes In total: ------------------------------------------------------------------------ Ran 0 total tests in the following environments and test suites. pass 0 fail 0 xfail 0 skip 0 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - x15 - arm - x86_64 Test Suites ----------- Failures ------------------------------------------------------------------------ i386: x86: x15: dragonboard-410c: juno-r2: hi6220-hikey: Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

1
0
0 0

next-20190507 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: 00c3bc00f0cadbb48f2414370733892676511e79 git describe: next-20190507 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190507 Regressions (compared to build next-20190506) ------------------------------------------------------------------------ qemu_arm: kselftest: * cgroup_test_freezer x86_64: kselftest: * net_fib-onlink-tests.sh kselftest-vsyscall-mode-native: * bpf_test_sockmap x86_64: kselftest: * net_fib-onlink-tests.sh kselftest-vsyscall-mode-native: * bpf_test_sockmap Fixes (compared to build next-20190506) ------------------------------------------------------------------------ qemu_arm64: kselftest: * timers_set-timer-lat x86_64: kselftest: * bpf_test_sock_addr.sh * bpf_test_sockmap kselftest-vsyscall-mode-native: * net_fib-onlink-tests.sh x86_64: kselftest: * bpf_test_sock_addr.sh * bpf_test_sockmap kselftest-vsyscall-mode-native: * net_fib-onlink-tests.sh In total: ------------------------------------------------------------------------ Ran 1280 total tests in the following environments and test suites. pass 763 fail 420 xfail 0 skip 97 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-515 * kselftest * boot-lkft-kselftests-vsyscall-mode-native-master-515 * boot-lkft-kselftests-vsyscall-mode-none-master-515 * kselftest-vsyscall-mode-native * kselftest-vsyscall-mode-none Failures ------------------------------------------------------------------------ qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 qemu_arm: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cgroup_test_freezer * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests qemu_i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs x15: * boot-lkft-kselftests-master-515/x15 qemu_arm64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests hi6220-hikey: * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh juno-r2: * boot-lkft-kselftests-master-515/juno-r2 x86: * kselftest-vsyscall-mode-native/binderfs_binderfs_test * kselftest-vsyscall-mode-native/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-native/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-native/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-native/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-native/bpf_test_netcnt * kselftest-vsyscall-mode-native/bpf_test_progs * kselftest-vsyscall-mode-native/bpf_test_sock_fields * kselftest-vsyscall-mode-native/bpf_test_sockmap * kselftest-vsyscall-mode-native/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-native/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-native/cgroup_test_core * kselftest-vsyscall-mode-native/dma-buf_udmabuf * kselftest-vsyscall-mode-native/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-native/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-native/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-native/kvm_dirty_log_test * kselftest-vsyscall-mode-native/kvm_evmcs_test * kselftest-vsyscall-mode-native/kvm_hyperv_cpuid * kselftest-vsyscall-mode-native/kvm_platform_info_test * kselftest-vsyscall-mode-native/kvm_set_sregs_test * kselftest-vsyscall-mode-native/kvm_smm_test * kselftest-vsyscall-mode-native/kvm_state_test * kselftest-vsyscall-mode-native/kvm_sync_regs_test * kselftest-vsyscall-mode-native/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-native/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-native/lib_bitmap.sh * kselftest-vsyscall-mode-native/lib_prime_numbers.sh * kselftest-vsyscall-mode-native/lib_printf.sh * kselftest-vsyscall-mode-native/lib_strscpy.sh * kselftest-vsyscall-mode-native/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-native/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-native/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-native/membarrier_membarrier_test * kselftest-vsyscall-mode-native/net_fib_rule_tests.sh * kselftest-vsyscall-mode-native/net_ip_defrag.sh * kselftest-vsyscall-mode-native/net_msg_zerocopy.sh * kselftest-vsyscall-mode-native/net_pmtu.sh * kselftest-vsyscall-mode-native/net_psock_snd.sh * kselftest-vsyscall-mode-native/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-native/net_xfrm_policy.sh * kselftest-vsyscall-mode-native/pidfd_pidfd_test * kselftest-vsyscall-mode-native/pstore_pstore_tests * kselftest-vsyscall-mode-native/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-native/rseq_basic_test * kselftest-vsyscall-mode-native/rseq_param_test * kselftest-vsyscall-mode-native/rseq_param_test_benchmark * kselftest-vsyscall-mode-native/rseq_param_test_compare_twice * kselftest-vsyscall-mode-native/rseq_run_param_test.sh * kselftest-vsyscall-mode-native/rtc_rtctest * kselftest-vsyscall-mode-native/seccomp_seccomp_bpf * kselftest-vsyscall-mode-native/tpm2_test_smoke.sh * kselftest-vsyscall-mode-native/tpm2_test_space.sh * kselftest-vsyscall-mode-native/vm_run_vmtests * kselftest-vsyscall-mode-native/x86_mpx-mini-test_64 * kselftest-vsyscall-mode-none/binderfs_binderfs_test * kselftest-vsyscall-mode-none/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-none/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-none/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-none/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-none/bpf_test_netcnt * kselftest-vsyscall-mode-none/bpf_test_progs * kselftest-vsyscall-mode-none/bpf_test_sock_addr.sh * kselftest-vsyscall-mode-none/bpf_test_sock_fields * kselftest-vsyscall-mode-none/bpf_test_sockmap * kselftest-vsyscall-mode-none/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-none/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-none/cgroup_test_core * kselftest-vsyscall-mode-none/dma-buf_udmabuf * kselftest-vsyscall-mode-none/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-none/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-none/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-none/kvm_dirty_log_test * kselftest-vsyscall-mode-none/kvm_evmcs_test * kselftest-vsyscall-mode-none/kvm_hyperv_cpuid * kselftest-vsyscall-mode-none/kvm_platform_info_test * kselftest-vsyscall-mode-none/kvm_set_sregs_test * kselftest-vsyscall-mode-none/kvm_smm_test * kselftest-vsyscall-mode-none/kvm_state_test * kselftest-vsyscall-mode-none/kvm_sync_regs_test * kselftest-vsyscall-mode-none/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-none/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-none/lib_bitmap.sh * kselftest-vsyscall-mode-none/lib_prime_numbers.sh * kselftest-vsyscall-mode-none/lib_printf.sh * kselftest-vsyscall-mode-none/lib_strscpy.sh * kselftest-vsyscall-mode-none/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-none/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-none/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-none/membarrier_membarrier_test * kselftest-vsyscall-mode-none/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-none/net_fib_rule_tests.sh * kselftest-vsyscall-mode-none/net_ip_defrag.sh * kselftest-vsyscall-mode-none/net_msg_zerocopy.sh * kselftest-vsyscall-mode-none/net_pmtu.sh * kselftest-vsyscall-mode-none/net_psock_snd.sh * kselftest-vsyscall-mode-none/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-none/net_xfrm_policy.sh * kselftest-vsyscall-mode-none/pidfd_pidfd_test * kselftest-vsyscall-mode-none/pstore_pstore_tests * kselftest-vsyscall-mode-none/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-none/rseq_basic_test * kselftest-vsyscall-mode-none/rseq_param_test * kselftest-vsyscall-mode-none/rseq_param_test_benchmark * kselftest-vsyscall-mode-none/rseq_param_test_compare_twice * kselftest-vsyscall-mode-none/rseq_run_param_test.sh * kselftest-vsyscall-mode-none/seccomp_seccomp_bpf * kselftest-vsyscall-mode-none/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-none/tpm2_test_smoke.sh * kselftest-vsyscall-mode-none/tpm2_test_space.sh * kselftest-vsyscall-mode-none/vm_run_vmtests * kselftest-vsyscall-mode-none/x86_mpx-mini-test_64 * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 * kselftest/x86_mpx-mini-test_64 i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs dragonboard-410c: * boot-lkft-kselftests-master-515/dragonboard-410c Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

1
0
0 0

[RFC][PATCH 0/3] x86_64/ftrace: Emulate calls from int3 when patching functions

by Steven Rostedt

Nicolai Stange discovered that Live Kernel Patching can have unforseen consequences if tracing is enabled when there are functions that are patched. The reason being, is that Live Kernel patching is built on top of ftrace, which will have the patched functions call the live kernel trampoline directly, and that trampoline will modify the regs->ip address to return to the patched function. But in the transition between changing the call to the customized trampoline, the tracing code is needed to have its handler called an well, so the function fentry location must be changed from calling the live kernel patching trampoline, to the ftrace_reg_caller trampoline which will iterate through all the registered ftrace handlers for that function. During this transition, a break point is added to do the live code modifications. But if that break point is hit, it just skips calling any handler, and makes the call site act as a nop. For tracing, the worse that can happen is that you miss a function being traced, but for live kernel patching the affects are more severe, as the old buggy function is now called. To solve this, an int3_emulate_call() is created for x86_64 to allow ftrace on x86_64 to emulate the call to ftrace_regs_caller() which will make sure all the registered handlers to that function are still called. And this keeps live kernel patching happy! To mimimize the changes, and to avoid controversial patches, this only changes x86_64. Due to the way x86_32 implements the regs->sp the complexity of emulating calls on that platform is too much for stable patches, and live kernel patching does not support x86_32 anyway. Josh Poimboeuf (1): x86_64: Add gap to int3 to allow for call emulation Peter Zijlstra (2): x86_64: Allow breakpoints to emulate call functions ftrace/x86_64: Emulate call function while updating in breakpoint handler ---- arch/x86/entry/entry_64.S | 18 ++++++++++++++++-- arch/x86/include/asm/text-patching.h | 22 ++++++++++++++++++++++ arch/x86/kernel/ftrace.c | 32 +++++++++++++++++++++++++++----- 3 files changed, 65 insertions(+), 7 deletions(-)

6 years, 7 months

2
12
0 0

next-20190506 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0-rc7 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: fcdb095ad0016d77d3729dcf8ea915ca4b80fd8b git describe: next-20190506 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190506 Regressions (compared to build next-20190503) ------------------------------------------------------------------------ qemu_arm64: kselftest: * bpf_test_maps * timers_set-timer-lat qemu_i386: kselftest: * bpf_test_maps x15 - arm: kselftest: * bpf_test_maps x86_64: kselftest: * x86_fsgsbase_64 Fixes (compared to build next-20190503) ------------------------------------------------------------------------ qemu_arm: kselftest: * bpf_test_maps x15 - arm: kselftest: * cgroup_test_freezer x86_64: kselftest: * net_fib-onlink-tests.sh kselftest-vsyscall-mode-native: * bpf_test_sockmap * x86_fsgsbase_64 x86_64: kselftest: * net_fib-onlink-tests.sh kselftest-vsyscall-mode-native: * bpf_test_sockmap * x86_fsgsbase_64 In total: ------------------------------------------------------------------------ Ran 1461 total tests in the following environments and test suites. pass 862 fail 485 xfail 0 skip 114 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-514 * kselftest * boot-lkft-kselftests-vsyscall-mode-native-master-514 * boot-lkft-kselftests-vsyscall-mode-none-master-514 * kselftest-vsyscall-mode-native * kselftest-vsyscall-mode-none Failures ------------------------------------------------------------------------ qemu_i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs qemu_arm: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 x15: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests qemu_arm64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timers_set-timer-lat * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests hi6220-hikey: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests juno-r2: dragonboard-410c: * boot-lkft-kselftests-master-514/dragonboard-410c i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs x86: * kselftest-vsyscall-mode-none/binderfs_binderfs_test * kselftest-vsyscall-mode-none/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-none/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-none/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-none/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-none/bpf_test_netcnt * kselftest-vsyscall-mode-none/bpf_test_progs * kselftest-vsyscall-mode-none/bpf_test_sock_addr.sh * kselftest-vsyscall-mode-none/bpf_test_sock_fields * kselftest-vsyscall-mode-none/bpf_test_sockmap * kselftest-vsyscall-mode-none/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-none/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-none/cgroup_test_core * kselftest-vsyscall-mode-none/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-none/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-none/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-none/kvm_dirty_log_test * kselftest-vsyscall-mode-none/kvm_evmcs_test * kselftest-vsyscall-mode-none/kvm_hyperv_cpuid * kselftest-vsyscall-mode-none/kvm_platform_info_test * kselftest-vsyscall-mode-none/kvm_set_sregs_test * kselftest-vsyscall-mode-none/kvm_smm_test * kselftest-vsyscall-mode-none/kvm_state_test * kselftest-vsyscall-mode-none/kvm_sync_regs_test * kselftest-vsyscall-mode-none/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-none/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-none/lib_bitmap.sh * kselftest-vsyscall-mode-none/lib_prime_numbers.sh * kselftest-vsyscall-mode-none/lib_printf.sh * kselftest-vsyscall-mode-none/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-none/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-none/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-none/membarrier_membarrier_test * kselftest-vsyscall-mode-none/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-none/net_fib_rule_tests.sh * kselftest-vsyscall-mode-none/net_ip_defrag.sh * kselftest-vsyscall-mode-none/net_msg_zerocopy.sh * kselftest-vsyscall-mode-none/net_pmtu.sh * kselftest-vsyscall-mode-none/net_psock_snd.sh * kselftest-vsyscall-mode-none/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-none/net_xfrm_policy.sh * kselftest-vsyscall-mode-none/pidfd_pidfd_test * kselftest-vsyscall-mode-none/pstore_pstore_tests * kselftest-vsyscall-mode-none/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-none/rseq_basic_test * kselftest-vsyscall-mode-none/rseq_param_test * kselftest-vsyscall-mode-none/rseq_param_test_benchmark * kselftest-vsyscall-mode-none/rseq_param_test_compare_twice * kselftest-vsyscall-mode-none/rseq_run_param_test.sh * kselftest-vsyscall-mode-none/seccomp_seccomp_bpf * kselftest-vsyscall-mode-none/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-none/tpm2_test_smoke.sh * kselftest-vsyscall-mode-none/tpm2_test_space.sh * kselftest-vsyscall-mode-none/vm_run_vmtests * kselftest-vsyscall-mode-none/x86_mpx-mini-test_64 * kselftest-vsyscall-mode-native/binderfs_binderfs_test * kselftest-vsyscall-mode-native/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-native/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-native/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-native/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-native/bpf_test_netcnt * kselftest-vsyscall-mode-native/bpf_test_progs * kselftest-vsyscall-mode-native/bpf_test_sock_fields * kselftest-vsyscall-mode-native/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-native/cgroup_test_core * kselftest-vsyscall-mode-native/dma-buf_udmabuf * kselftest-vsyscall-mode-native/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-native/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-native/kvm_dirty_log_test * kselftest-vsyscall-mode-native/kvm_evmcs_test * kselftest-vsyscall-mode-native/kvm_hyperv_cpuid * kselftest-vsyscall-mode-native/kvm_platform_info_test * kselftest-vsyscall-mode-native/kvm_set_sregs_test * kselftest-vsyscall-mode-native/kvm_smm_test * kselftest-vsyscall-mode-native/kvm_state_test * kselftest-vsyscall-mode-native/kvm_sync_regs_test * kselftest-vsyscall-mode-native/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-native/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-native/lib_bitmap.sh * kselftest-vsyscall-mode-native/lib_prime_numbers.sh * kselftest-vsyscall-mode-native/lib_printf.sh * kselftest-vsyscall-mode-native/lib_strscpy.sh * kselftest-vsyscall-mode-native/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-native/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-native/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-native/membarrier_membarrier_test * kselftest-vsyscall-mode-native/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-native/net_fib_rule_tests.sh * kselftest-vsyscall-mode-native/net_ip_defrag.sh * kselftest-vsyscall-mode-native/net_msg_zerocopy.sh * kselftest-vsyscall-mode-native/net_pmtu.sh * kselftest-vsyscall-mode-native/net_psock_snd.sh * kselftest-vsyscall-mode-native/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-native/net_xfrm_policy.sh * kselftest-vsyscall-mode-native/pidfd_pidfd_test * kselftest-vsyscall-mode-native/pstore_pstore_tests * kselftest-vsyscall-mode-native/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-native/rseq_basic_test * kselftest-vsyscall-mode-native/rseq_param_test * kselftest-vsyscall-mode-native/rseq_param_test_benchmark * kselftest-vsyscall-mode-native/rseq_param_test_compare_twice * kselftest-vsyscall-mode-native/rseq_run_param_test.sh * kselftest-vsyscall-mode-native/rtc_rtctest * kselftest-vsyscall-mode-native/seccomp_seccomp_bpf * kselftest-vsyscall-mode-native/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-native/tpm2_test_smoke.sh * kselftest-vsyscall-mode-native/tpm2_test_space.sh * kselftest-vsyscall-mode-native/vm_run_vmtests * kselftest-vsyscall-mode-native/x86_mpx-mini-test_64 * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 * kselftest/x86_mpx-mini-test_64 Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

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[PATCH v2] kheaders: Move from proc to sysfs

by Joel Fernandes (Google)

The kheaders archive consisting of the kernel headers used for compiling bpf programs is in /proc. However there is concern that moving it here will make it permanent. Let us move it to /sys/kernel as discussed [1]. [1] https://lore.kernel.org/patchwork/patch/1067310/#1265969 Suggested-by: Steven Rostedt <rostedt(a)goodmis.org> Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> --- This patch applies on top of the previous patch that was applied to the driver tree: https://lore.kernel.org/patchwork/patch/1067310/ v1->v2: Fixed some kconfig nits (Masami). init/Kconfig | 16 ++++----- kernel/Makefile | 4 +-- kernel/{gen_ikh_data.sh => gen_kheaders.sh} | 2 +- kernel/kheaders.c | 40 +++++++++------------ 4 files changed, 26 insertions(+), 36 deletions(-) rename kernel/{gen_ikh_data.sh => gen_kheaders.sh} (98%) diff --git a/init/Kconfig b/init/Kconfig index 26a364a95b57..c3661991b089 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -579,15 +579,13 @@ config IKCONFIG_PROC This option enables access to the kernel configuration file through /proc/config.gz. -config IKHEADERS_PROC - tristate "Enable kernel header artifacts through /proc/kheaders.tar.xz" - depends on PROC_FS - help - This option enables access to the kernel header and other artifacts that - are generated during the build process. These can be used to build eBPF - tracing programs, or similar programs. If you build the headers as a - module, a module called kheaders.ko is built which can be loaded on-demand - to get access to the headers. +config IKHEADERS + tristate "Enable kernel headers through /sys/kernel/kheaders.tar.xz" + help + This option enables access to the in-kernel headers that are generated during + the build process. These can be used to build eBPF tracing programs, + or similar programs. If you build the headers as a module, a module called + kheaders.ko is built which can be loaded on-demand to get access to headers. config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" diff --git a/kernel/Makefile b/kernel/Makefile index 12399614c350..b32a558fae2f 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -70,7 +70,7 @@ obj-$(CONFIG_UTS_NS) += utsname.o obj-$(CONFIG_USER_NS) += user_namespace.o obj-$(CONFIG_PID_NS) += pid_namespace.o obj-$(CONFIG_IKCONFIG) += configs.o -obj-$(CONFIG_IKHEADERS_PROC) += kheaders.o +obj-$(CONFIG_IKHEADERS) += kheaders.o obj-$(CONFIG_SMP) += stop_machine.o obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o obj-$(CONFIG_AUDIT) += audit.o auditfilter.o @@ -126,7 +126,7 @@ $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE $(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz -cmd_genikh = $(srctree)/kernel/gen_ikh_data.sh $@ +cmd_genikh = $(srctree)/kernel/gen_kheaders.sh $@ $(obj)/kheaders_data.tar.xz: FORCE $(call cmd,genikh) diff --git a/kernel/gen_ikh_data.sh b/kernel/gen_kheaders.sh similarity index 98% rename from kernel/gen_ikh_data.sh rename to kernel/gen_kheaders.sh index 591a94f7b387..581b83534587 100755 --- a/kernel/gen_ikh_data.sh +++ b/kernel/gen_kheaders.sh @@ -2,7 +2,7 @@ # SPDX-License-Identifier: GPL-2.0 # This script generates an archive consisting of kernel headers -# for CONFIG_IKHEADERS_PROC. +# for CONFIG_IKHEADERS. set -e spath="$(dirname "$(readlink -f "$0")")" kroot="$spath/.." diff --git a/kernel/kheaders.c b/kernel/kheaders.c index 70ae6052920d..6a16f8f6898d 100644 --- a/kernel/kheaders.c +++ b/kernel/kheaders.c @@ -8,9 +8,8 @@ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/proc_fs.h> +#include <linux/kobject.h> #include <linux/init.h> -#include <linux/uaccess.h> /* * Define kernel_headers_data and kernel_headers_data_end, within which the @@ -31,39 +30,32 @@ extern char kernel_headers_data; extern char kernel_headers_data_end; static ssize_t -ikheaders_read_current(struct file *file, char __user *buf, - size_t len, loff_t *offset) +ikheaders_read(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t len) { - return simple_read_from_buffer(buf, len, offset, - &kernel_headers_data, - &kernel_headers_data_end - - &kernel_headers_data); + memcpy(buf, &kernel_headers_data + off, len); + return len; } -static const struct file_operations ikheaders_file_ops = { - .read = ikheaders_read_current, - .llseek = default_llseek, +static struct bin_attribute kheaders_attr __ro_after_init = { + .attr = { + .name = "kheaders.tar.xz", + .mode = S_IRUGO, + }, + .read = &ikheaders_read, }; static int __init ikheaders_init(void) { - struct proc_dir_entry *entry; - - /* create the current headers file */ - entry = proc_create("kheaders.tar.xz", S_IRUGO, NULL, - &ikheaders_file_ops); - if (!entry) - return -ENOMEM; - - proc_set_size(entry, - &kernel_headers_data_end - - &kernel_headers_data); - return 0; + kheaders_attr.size = (&kernel_headers_data_end - + &kernel_headers_data); + return sysfs_create_bin_file(kernel_kobj, &kheaders_attr); } static void __exit ikheaders_cleanup(void) { - remove_proc_entry("kheaders.tar.xz", NULL); + sysfs_remove_bin_file(kernel_kobj, &kheaders_attr); } module_init(ikheaders_init); -- 2.21.0.1020.gf2820cf01a-goog

6 years, 7 months

5
10
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[PATCH AUTOSEL 3.18 09/10] selftests/net: correct the return value for run_netsocktests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 30c04d796b693e22405c38e9b78e9a364e4c77e6 ] The run_netsocktests will be marked as passed regardless the actual test result from the ./socket: selftests: net: run_netsocktests ======================================== -------------------- running socket test -------------------- [FAIL] ok 1..6 selftests: net: run_netsocktests [PASS] This is because the test script itself has been successfully executed. Fix this by exit 1 when the test failed. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_netsocktests | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests index c09a682df56a..19486dab2379 100644 --- a/tools/testing/selftests/net/run_netsocktests +++ b/tools/testing/selftests/net/run_netsocktests @@ -6,7 +6,7 @@ echo "--------------------" ./socket if [ $? -ne 0 ]; then echo "[FAIL]" + exit 1 else echo "[PASS]" fi - -- 2.20.1

6 years, 7 months

1
0
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[PATCH AUTOSEL 4.4 13/14] selftests/net: correct the return value for run_netsocktests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 30c04d796b693e22405c38e9b78e9a364e4c77e6 ] The run_netsocktests will be marked as passed regardless the actual test result from the ./socket: selftests: net: run_netsocktests ======================================== -------------------- running socket test -------------------- [FAIL] ok 1..6 selftests: net: run_netsocktests [PASS] This is because the test script itself has been successfully executed. Fix this by exit 1 when the test failed. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_netsocktests | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests index 16058bbea7a8..c195b4478662 100755 --- a/tools/testing/selftests/net/run_netsocktests +++ b/tools/testing/selftests/net/run_netsocktests @@ -6,7 +6,7 @@ echo "--------------------" ./socket if [ $? -ne 0 ]; then echo "[FAIL]" + exit 1 else echo "[PASS]" fi - -- 2.20.1

6 years, 7 months

1
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[PATCH AUTOSEL 4.9 21/25] selftests/net: correct the return value for run_netsocktests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 30c04d796b693e22405c38e9b78e9a364e4c77e6 ] The run_netsocktests will be marked as passed regardless the actual test result from the ./socket: selftests: net: run_netsocktests ======================================== -------------------- running socket test -------------------- [FAIL] ok 1..6 selftests: net: run_netsocktests [PASS] This is because the test script itself has been successfully executed. Fix this by exit 1 when the test failed. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_netsocktests | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests index 16058bbea7a8..c195b4478662 100755 --- a/tools/testing/selftests/net/run_netsocktests +++ b/tools/testing/selftests/net/run_netsocktests @@ -6,7 +6,7 @@ echo "--------------------" ./socket if [ $? -ne 0 ]; then echo "[FAIL]" + exit 1 else echo "[PASS]" fi - -- 2.20.1

6 years, 7 months

1
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[PATCH AUTOSEL 4.9 16/25] selftests: netfilter: check icmp pkttoobig errors are set as related

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit becf2319f320cae43e20cf179cc51a355a0deb5f ] When an icmp error such as pkttoobig is received, conntrack checks if the "inner" header (header of packet that did not fit link mtu) is matches an existing connection, and, if so, sets that packet as being related to the conntrack entry it found. It was recently reported that this "related" setting also works if the inner header is from another, different connection (i.e., artificial/forged icmp error). Add a test, followup patch will add additional "inner dst matches outer dst in reverse direction" check before setting related state. Link: https://www.synacktiv.com/posts/systems/icmp-reachable.html Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/Makefile | 2 +- .../netfilter/conntrack_icmp_related.sh | 283 ++++++++++++++++++ 2 files changed, 284 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/netfilter/conntrack_icmp_related.sh diff --git a/tools/testing/selftests/netfilter/Makefile b/tools/testing/selftests/netfilter/Makefile index c9ff2b47bd1c..a37cb1192c6a 100644 --- a/tools/testing/selftests/netfilter/Makefile +++ b/tools/testing/selftests/netfilter/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for netfilter selftests -TEST_PROGS := nft_trans_stress.sh nft_nat.sh +TEST_PROGS := nft_trans_stress.sh nft_nat.sh conntrack_icmp_related.sh include ../lib.mk diff --git a/tools/testing/selftests/netfilter/conntrack_icmp_related.sh b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh new file mode 100755 index 000000000000..b48e1833bc89 --- /dev/null +++ b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh @@ -0,0 +1,283 @@ +#!/bin/bash +# +# check that ICMP df-needed/pkttoobig icmp are set are set as related +# state +# +# Setup is: +# +# nsclient1 -> nsrouter1 -> nsrouter2 -> nsclient2 +# MTU 1500, except for nsrouter2 <-> nsclient2 link (1280). +# ping nsclient2 from nsclient1, checking that conntrack did set RELATED +# 'fragmentation needed' icmp packet. +# +# In addition, nsrouter1 will perform IP masquerading, i.e. also +# check the icmp errors are propagated to the correct host as per +# nat of "established" icmp-echo "connection". + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +cleanup() { + for i in 1 2;do ip netns del nsclient$i;done + for i in 1 2;do ip netns del nsrouter$i;done +} + +ipv4() { + echo -n 192.168.$1.2 +} + +ipv6 () { + echo -n dead:$1::2 +} + +check_counter() +{ + ns=$1 + name=$2 + expect=$3 + local lret=0 + + cnt=$(ip netns exec $ns nft list counter inet filter "$name" | grep -q "$expect") + if [ $? -ne 0 ]; then + echo "ERROR: counter $name in $ns has unexpected value (expected $expect)" 1>&2 + ip netns exec $ns nft list counter inet filter "$name" 1>&2 + lret=1 + fi + + return $lret +} + +check_unknown() +{ + expect="packets 0 bytes 0" + for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + check_counter $n "unknown" "$expect" + if [ $? -ne 0 ] ;then + return 1 + fi + done + + return 0 +} + +for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + ip netns add $n + ip -net $n link set lo up +done + +DEV=veth0 +ip link add $DEV netns nsclient1 type veth peer name eth1 netns nsrouter1 +DEV=veth0 +ip link add $DEV netns nsclient2 type veth peer name eth1 netns nsrouter2 + +DEV=veth0 +ip link add $DEV netns nsrouter1 type veth peer name eth2 netns nsrouter2 + +DEV=veth0 +for i in 1 2; do + ip -net nsclient$i link set $DEV up + ip -net nsclient$i addr add $(ipv4 $i)/24 dev $DEV + ip -net nsclient$i addr add $(ipv6 $i)/64 dev $DEV +done + +ip -net nsrouter1 link set eth1 up +ip -net nsrouter1 link set veth0 up + +ip -net nsrouter2 link set eth1 up +ip -net nsrouter2 link set eth2 up + +ip -net nsclient1 route add default via 192.168.1.1 +ip -net nsclient1 -6 route add default via dead:1::1 + +ip -net nsclient2 route add default via 192.168.2.1 +ip -net nsclient2 route add default via dead:2::1 + +i=3 +ip -net nsrouter1 addr add 192.168.1.1/24 dev eth1 +ip -net nsrouter1 addr add 192.168.3.1/24 dev veth0 +ip -net nsrouter1 addr add dead:1::1/64 dev eth1 +ip -net nsrouter1 addr add dead:3::1/64 dev veth0 +ip -net nsrouter1 route add default via 192.168.3.10 +ip -net nsrouter1 -6 route add default via dead:3::10 + +ip -net nsrouter2 addr add 192.168.2.1/24 dev eth1 +ip -net nsrouter2 addr add 192.168.3.10/24 dev eth2 +ip -net nsrouter2 addr add dead:2::1/64 dev eth1 +ip -net nsrouter2 addr add dead:3::10/64 dev eth2 +ip -net nsrouter2 route add default via 192.168.3.1 +ip -net nsrouter2 route add default via dead:3::1 + +sleep 2 +for i in 4 6; do + ip netns exec nsrouter1 sysctl -q net.ipv$i.conf.all.forwarding=1 + ip netns exec nsrouter2 sysctl -q net.ipv$i.conf.all.forwarding=1 +done + +for netns in nsrouter1 nsrouter2; do +ip netns exec $netns nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain forward { + type filter hook forward priority 0; policy accept; + meta l4proto icmpv6 icmpv6 type "packet-too-big" ct state "related" counter name "related" accept + meta l4proto icmp icmp type "destination-unreachable" ct state "related" counter name "related" accept + meta l4proto { icmp, icmpv6 } ct state new,established accept + counter name "unknown" drop + } +} +EOF +done + +ip netns exec nsclient1 nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "related" counter name "related" accept + counter name "unknown" drop + } +} +EOF + +ip netns exec nsclient2 nft -f - <<EOF +table inet filter { + counter unknown { } + counter new { } + counter established { } + + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" accept + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" accept + counter name "unknown" drop + } + chain output { + type filter hook output priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" + counter name "unknown" drop + } +} +EOF + + +# make sure NAT core rewrites adress of icmp error if nat is used according to +# conntrack nat information (icmp error will be directed at nsrouter1 address, +# but it needs to be routed to nsclient1 address). +ip netns exec nsrouter1 nft -f - <<EOF +table ip nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip protocol icmp oifname "veth0" counter masquerade + } +} +table ip6 nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip6 nexthdr icmpv6 oifname "veth0" counter masquerade + } +} +EOF + +ip netns exec nsrouter2 ip link set eth1 mtu 1280 +ip netns exec nsclient2 ip link set veth0 mtu 1280 +sleep 1 + +ip netns exec nsclient1 ping -c 1 -s 1000 -q -M do 192.168.2.2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ip routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi +ip netns exec nsclient1 ping6 -q -c 1 -s 1000 dead:2::2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ipv6 routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi + +check_unknown +if [ $? -ne 0 ]; then + ret=1 +fi + +expect="packets 0 bytes 0" +for netns in nsrouter1 nsrouter2 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +expect="packets 2 bytes 2076" +check_counter nsclient2 "new" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +ip netns exec nsclient1 ping -q -c 1 -s 1300 -M do 192.168.2.2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +# nsrouter2 should have generated the icmp error, so +# related counter should be 0 (its in forward). +expect="packets 0 bytes 0" +check_counter "nsrouter2" "related" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +# but nsrouter1 should have seen it, same for nsclient1. +expect="packets 1 bytes 576" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +ip netns exec nsclient1 ping6 -c 1 -s 1300 dead:2::2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping6 should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +expect="packets 2 bytes 1856" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +if [ $ret -eq 0 ];then + echo "PASS: icmp mtu error had RELATED state" +else + echo "ERROR: icmp error RELATED state test has failed" +fi + +cleanup +exit $ret -- 2.20.1

6 years, 7 months

1
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[PATCH AUTOSEL 4.14 29/95] selftests/net: correct the return value for run_netsocktests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 30c04d796b693e22405c38e9b78e9a364e4c77e6 ] The run_netsocktests will be marked as passed regardless the actual test result from the ./socket: selftests: net: run_netsocktests ======================================== -------------------- running socket test -------------------- [FAIL] ok 1..6 selftests: net: run_netsocktests [PASS] This is because the test script itself has been successfully executed. Fix this by exit 1 when the test failed. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_netsocktests | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests index b093f39c298c..14e41faf2c57 100755 --- a/tools/testing/selftests/net/run_netsocktests +++ b/tools/testing/selftests/net/run_netsocktests @@ -7,7 +7,7 @@ echo "--------------------" ./socket if [ $? -ne 0 ]; then echo "[FAIL]" + exit 1 else echo "[PASS]" fi - -- 2.20.1

6 years, 7 months

1
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[PATCH AUTOSEL 4.14 23/95] selftests: netfilter: check icmp pkttoobig errors are set as related

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit becf2319f320cae43e20cf179cc51a355a0deb5f ] When an icmp error such as pkttoobig is received, conntrack checks if the "inner" header (header of packet that did not fit link mtu) is matches an existing connection, and, if so, sets that packet as being related to the conntrack entry it found. It was recently reported that this "related" setting also works if the inner header is from another, different connection (i.e., artificial/forged icmp error). Add a test, followup patch will add additional "inner dst matches outer dst in reverse direction" check before setting related state. Link: https://www.synacktiv.com/posts/systems/icmp-reachable.html Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/Makefile | 2 +- .../netfilter/conntrack_icmp_related.sh | 283 ++++++++++++++++++ 2 files changed, 284 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/netfilter/conntrack_icmp_related.sh diff --git a/tools/testing/selftests/netfilter/Makefile b/tools/testing/selftests/netfilter/Makefile index c9ff2b47bd1c..a37cb1192c6a 100644 --- a/tools/testing/selftests/netfilter/Makefile +++ b/tools/testing/selftests/netfilter/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for netfilter selftests -TEST_PROGS := nft_trans_stress.sh nft_nat.sh +TEST_PROGS := nft_trans_stress.sh nft_nat.sh conntrack_icmp_related.sh include ../lib.mk diff --git a/tools/testing/selftests/netfilter/conntrack_icmp_related.sh b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh new file mode 100755 index 000000000000..b48e1833bc89 --- /dev/null +++ b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh @@ -0,0 +1,283 @@ +#!/bin/bash +# +# check that ICMP df-needed/pkttoobig icmp are set are set as related +# state +# +# Setup is: +# +# nsclient1 -> nsrouter1 -> nsrouter2 -> nsclient2 +# MTU 1500, except for nsrouter2 <-> nsclient2 link (1280). +# ping nsclient2 from nsclient1, checking that conntrack did set RELATED +# 'fragmentation needed' icmp packet. +# +# In addition, nsrouter1 will perform IP masquerading, i.e. also +# check the icmp errors are propagated to the correct host as per +# nat of "established" icmp-echo "connection". + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +cleanup() { + for i in 1 2;do ip netns del nsclient$i;done + for i in 1 2;do ip netns del nsrouter$i;done +} + +ipv4() { + echo -n 192.168.$1.2 +} + +ipv6 () { + echo -n dead:$1::2 +} + +check_counter() +{ + ns=$1 + name=$2 + expect=$3 + local lret=0 + + cnt=$(ip netns exec $ns nft list counter inet filter "$name" | grep -q "$expect") + if [ $? -ne 0 ]; then + echo "ERROR: counter $name in $ns has unexpected value (expected $expect)" 1>&2 + ip netns exec $ns nft list counter inet filter "$name" 1>&2 + lret=1 + fi + + return $lret +} + +check_unknown() +{ + expect="packets 0 bytes 0" + for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + check_counter $n "unknown" "$expect" + if [ $? -ne 0 ] ;then + return 1 + fi + done + + return 0 +} + +for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + ip netns add $n + ip -net $n link set lo up +done + +DEV=veth0 +ip link add $DEV netns nsclient1 type veth peer name eth1 netns nsrouter1 +DEV=veth0 +ip link add $DEV netns nsclient2 type veth peer name eth1 netns nsrouter2 + +DEV=veth0 +ip link add $DEV netns nsrouter1 type veth peer name eth2 netns nsrouter2 + +DEV=veth0 +for i in 1 2; do + ip -net nsclient$i link set $DEV up + ip -net nsclient$i addr add $(ipv4 $i)/24 dev $DEV + ip -net nsclient$i addr add $(ipv6 $i)/64 dev $DEV +done + +ip -net nsrouter1 link set eth1 up +ip -net nsrouter1 link set veth0 up + +ip -net nsrouter2 link set eth1 up +ip -net nsrouter2 link set eth2 up + +ip -net nsclient1 route add default via 192.168.1.1 +ip -net nsclient1 -6 route add default via dead:1::1 + +ip -net nsclient2 route add default via 192.168.2.1 +ip -net nsclient2 route add default via dead:2::1 + +i=3 +ip -net nsrouter1 addr add 192.168.1.1/24 dev eth1 +ip -net nsrouter1 addr add 192.168.3.1/24 dev veth0 +ip -net nsrouter1 addr add dead:1::1/64 dev eth1 +ip -net nsrouter1 addr add dead:3::1/64 dev veth0 +ip -net nsrouter1 route add default via 192.168.3.10 +ip -net nsrouter1 -6 route add default via dead:3::10 + +ip -net nsrouter2 addr add 192.168.2.1/24 dev eth1 +ip -net nsrouter2 addr add 192.168.3.10/24 dev eth2 +ip -net nsrouter2 addr add dead:2::1/64 dev eth1 +ip -net nsrouter2 addr add dead:3::10/64 dev eth2 +ip -net nsrouter2 route add default via 192.168.3.1 +ip -net nsrouter2 route add default via dead:3::1 + +sleep 2 +for i in 4 6; do + ip netns exec nsrouter1 sysctl -q net.ipv$i.conf.all.forwarding=1 + ip netns exec nsrouter2 sysctl -q net.ipv$i.conf.all.forwarding=1 +done + +for netns in nsrouter1 nsrouter2; do +ip netns exec $netns nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain forward { + type filter hook forward priority 0; policy accept; + meta l4proto icmpv6 icmpv6 type "packet-too-big" ct state "related" counter name "related" accept + meta l4proto icmp icmp type "destination-unreachable" ct state "related" counter name "related" accept + meta l4proto { icmp, icmpv6 } ct state new,established accept + counter name "unknown" drop + } +} +EOF +done + +ip netns exec nsclient1 nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "related" counter name "related" accept + counter name "unknown" drop + } +} +EOF + +ip netns exec nsclient2 nft -f - <<EOF +table inet filter { + counter unknown { } + counter new { } + counter established { } + + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" accept + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" accept + counter name "unknown" drop + } + chain output { + type filter hook output priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" + counter name "unknown" drop + } +} +EOF + + +# make sure NAT core rewrites adress of icmp error if nat is used according to +# conntrack nat information (icmp error will be directed at nsrouter1 address, +# but it needs to be routed to nsclient1 address). +ip netns exec nsrouter1 nft -f - <<EOF +table ip nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip protocol icmp oifname "veth0" counter masquerade + } +} +table ip6 nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip6 nexthdr icmpv6 oifname "veth0" counter masquerade + } +} +EOF + +ip netns exec nsrouter2 ip link set eth1 mtu 1280 +ip netns exec nsclient2 ip link set veth0 mtu 1280 +sleep 1 + +ip netns exec nsclient1 ping -c 1 -s 1000 -q -M do 192.168.2.2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ip routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi +ip netns exec nsclient1 ping6 -q -c 1 -s 1000 dead:2::2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ipv6 routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi + +check_unknown +if [ $? -ne 0 ]; then + ret=1 +fi + +expect="packets 0 bytes 0" +for netns in nsrouter1 nsrouter2 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +expect="packets 2 bytes 2076" +check_counter nsclient2 "new" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +ip netns exec nsclient1 ping -q -c 1 -s 1300 -M do 192.168.2.2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +# nsrouter2 should have generated the icmp error, so +# related counter should be 0 (its in forward). +expect="packets 0 bytes 0" +check_counter "nsrouter2" "related" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +# but nsrouter1 should have seen it, same for nsclient1. +expect="packets 1 bytes 576" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +ip netns exec nsclient1 ping6 -c 1 -s 1300 dead:2::2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping6 should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +expect="packets 2 bytes 1856" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +if [ $ret -eq 0 ];then + echo "PASS: icmp mtu error had RELATED state" +else + echo "ERROR: icmp error RELATED state test has failed" +fi + +cleanup +exit $ret -- 2.20.1

6 years, 7 months

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[PATCH AUTOSEL 4.19 51/81] selftests/net: correct the return value for run_netsocktests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 30c04d796b693e22405c38e9b78e9a364e4c77e6 ] The run_netsocktests will be marked as passed regardless the actual test result from the ./socket: selftests: net: run_netsocktests ======================================== -------------------- running socket test -------------------- [FAIL] ok 1..6 selftests: net: run_netsocktests [PASS] This is because the test script itself has been successfully executed. Fix this by exit 1 when the test failed. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_netsocktests | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests index b093f39c298c..14e41faf2c57 100755 --- a/tools/testing/selftests/net/run_netsocktests +++ b/tools/testing/selftests/net/run_netsocktests @@ -7,7 +7,7 @@ echo "--------------------" ./socket if [ $? -ne 0 ]; then echo "[FAIL]" + exit 1 else echo "[PASS]" fi - -- 2.20.1

6 years, 7 months

1
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[PATCH AUTOSEL 4.19 43/81] selftests: netfilter: check icmp pkttoobig errors are set as related

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit becf2319f320cae43e20cf179cc51a355a0deb5f ] When an icmp error such as pkttoobig is received, conntrack checks if the "inner" header (header of packet that did not fit link mtu) is matches an existing connection, and, if so, sets that packet as being related to the conntrack entry it found. It was recently reported that this "related" setting also works if the inner header is from another, different connection (i.e., artificial/forged icmp error). Add a test, followup patch will add additional "inner dst matches outer dst in reverse direction" check before setting related state. Link: https://www.synacktiv.com/posts/systems/icmp-reachable.html Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/Makefile | 2 +- .../netfilter/conntrack_icmp_related.sh | 283 ++++++++++++++++++ 2 files changed, 284 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/netfilter/conntrack_icmp_related.sh diff --git a/tools/testing/selftests/netfilter/Makefile b/tools/testing/selftests/netfilter/Makefile index c9ff2b47bd1c..a37cb1192c6a 100644 --- a/tools/testing/selftests/netfilter/Makefile +++ b/tools/testing/selftests/netfilter/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for netfilter selftests -TEST_PROGS := nft_trans_stress.sh nft_nat.sh +TEST_PROGS := nft_trans_stress.sh nft_nat.sh conntrack_icmp_related.sh include ../lib.mk diff --git a/tools/testing/selftests/netfilter/conntrack_icmp_related.sh b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh new file mode 100755 index 000000000000..b48e1833bc89 --- /dev/null +++ b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh @@ -0,0 +1,283 @@ +#!/bin/bash +# +# check that ICMP df-needed/pkttoobig icmp are set are set as related +# state +# +# Setup is: +# +# nsclient1 -> nsrouter1 -> nsrouter2 -> nsclient2 +# MTU 1500, except for nsrouter2 <-> nsclient2 link (1280). +# ping nsclient2 from nsclient1, checking that conntrack did set RELATED +# 'fragmentation needed' icmp packet. +# +# In addition, nsrouter1 will perform IP masquerading, i.e. also +# check the icmp errors are propagated to the correct host as per +# nat of "established" icmp-echo "connection". + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +cleanup() { + for i in 1 2;do ip netns del nsclient$i;done + for i in 1 2;do ip netns del nsrouter$i;done +} + +ipv4() { + echo -n 192.168.$1.2 +} + +ipv6 () { + echo -n dead:$1::2 +} + +check_counter() +{ + ns=$1 + name=$2 + expect=$3 + local lret=0 + + cnt=$(ip netns exec $ns nft list counter inet filter "$name" | grep -q "$expect") + if [ $? -ne 0 ]; then + echo "ERROR: counter $name in $ns has unexpected value (expected $expect)" 1>&2 + ip netns exec $ns nft list counter inet filter "$name" 1>&2 + lret=1 + fi + + return $lret +} + +check_unknown() +{ + expect="packets 0 bytes 0" + for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + check_counter $n "unknown" "$expect" + if [ $? -ne 0 ] ;then + return 1 + fi + done + + return 0 +} + +for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + ip netns add $n + ip -net $n link set lo up +done + +DEV=veth0 +ip link add $DEV netns nsclient1 type veth peer name eth1 netns nsrouter1 +DEV=veth0 +ip link add $DEV netns nsclient2 type veth peer name eth1 netns nsrouter2 + +DEV=veth0 +ip link add $DEV netns nsrouter1 type veth peer name eth2 netns nsrouter2 + +DEV=veth0 +for i in 1 2; do + ip -net nsclient$i link set $DEV up + ip -net nsclient$i addr add $(ipv4 $i)/24 dev $DEV + ip -net nsclient$i addr add $(ipv6 $i)/64 dev $DEV +done + +ip -net nsrouter1 link set eth1 up +ip -net nsrouter1 link set veth0 up + +ip -net nsrouter2 link set eth1 up +ip -net nsrouter2 link set eth2 up + +ip -net nsclient1 route add default via 192.168.1.1 +ip -net nsclient1 -6 route add default via dead:1::1 + +ip -net nsclient2 route add default via 192.168.2.1 +ip -net nsclient2 route add default via dead:2::1 + +i=3 +ip -net nsrouter1 addr add 192.168.1.1/24 dev eth1 +ip -net nsrouter1 addr add 192.168.3.1/24 dev veth0 +ip -net nsrouter1 addr add dead:1::1/64 dev eth1 +ip -net nsrouter1 addr add dead:3::1/64 dev veth0 +ip -net nsrouter1 route add default via 192.168.3.10 +ip -net nsrouter1 -6 route add default via dead:3::10 + +ip -net nsrouter2 addr add 192.168.2.1/24 dev eth1 +ip -net nsrouter2 addr add 192.168.3.10/24 dev eth2 +ip -net nsrouter2 addr add dead:2::1/64 dev eth1 +ip -net nsrouter2 addr add dead:3::10/64 dev eth2 +ip -net nsrouter2 route add default via 192.168.3.1 +ip -net nsrouter2 route add default via dead:3::1 + +sleep 2 +for i in 4 6; do + ip netns exec nsrouter1 sysctl -q net.ipv$i.conf.all.forwarding=1 + ip netns exec nsrouter2 sysctl -q net.ipv$i.conf.all.forwarding=1 +done + +for netns in nsrouter1 nsrouter2; do +ip netns exec $netns nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain forward { + type filter hook forward priority 0; policy accept; + meta l4proto icmpv6 icmpv6 type "packet-too-big" ct state "related" counter name "related" accept + meta l4proto icmp icmp type "destination-unreachable" ct state "related" counter name "related" accept + meta l4proto { icmp, icmpv6 } ct state new,established accept + counter name "unknown" drop + } +} +EOF +done + +ip netns exec nsclient1 nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "related" counter name "related" accept + counter name "unknown" drop + } +} +EOF + +ip netns exec nsclient2 nft -f - <<EOF +table inet filter { + counter unknown { } + counter new { } + counter established { } + + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" accept + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" accept + counter name "unknown" drop + } + chain output { + type filter hook output priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" + counter name "unknown" drop + } +} +EOF + + +# make sure NAT core rewrites adress of icmp error if nat is used according to +# conntrack nat information (icmp error will be directed at nsrouter1 address, +# but it needs to be routed to nsclient1 address). +ip netns exec nsrouter1 nft -f - <<EOF +table ip nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip protocol icmp oifname "veth0" counter masquerade + } +} +table ip6 nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip6 nexthdr icmpv6 oifname "veth0" counter masquerade + } +} +EOF + +ip netns exec nsrouter2 ip link set eth1 mtu 1280 +ip netns exec nsclient2 ip link set veth0 mtu 1280 +sleep 1 + +ip netns exec nsclient1 ping -c 1 -s 1000 -q -M do 192.168.2.2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ip routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi +ip netns exec nsclient1 ping6 -q -c 1 -s 1000 dead:2::2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ipv6 routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi + +check_unknown +if [ $? -ne 0 ]; then + ret=1 +fi + +expect="packets 0 bytes 0" +for netns in nsrouter1 nsrouter2 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +expect="packets 2 bytes 2076" +check_counter nsclient2 "new" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +ip netns exec nsclient1 ping -q -c 1 -s 1300 -M do 192.168.2.2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +# nsrouter2 should have generated the icmp error, so +# related counter should be 0 (its in forward). +expect="packets 0 bytes 0" +check_counter "nsrouter2" "related" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +# but nsrouter1 should have seen it, same for nsclient1. +expect="packets 1 bytes 576" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +ip netns exec nsclient1 ping6 -c 1 -s 1300 dead:2::2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping6 should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +expect="packets 2 bytes 1856" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +if [ $ret -eq 0 ];then + echo "PASS: icmp mtu error had RELATED state" +else + echo "ERROR: icmp error RELATED state test has failed" +fi + +cleanup +exit $ret -- 2.20.1

6 years, 7 months

1
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[PATCH AUTOSEL 4.19 23/81] selftests: fib_tests: Fix 'Command line is not complete' errors

by Sasha Levin

From: David Ahern <dsahern(a)gmail.com> [ Upstream commit a5f622984a623df9a84cf43f6b098d8dd76fbe05 ] A couple of tests are verifying a route has been removed. The helper expects the prefix as the first part of the expected output. When checking that a route has been deleted the prefix is empty leading to an invalid ip command: $ ip ro ls match Command line is not complete. Try option "help" Fix by moving the comparison of expected output and output to a new function that is used by both check_route and check_route6. Use the new helper for the 2 checks on route removal. Also, remove the reset of 'set -x' in route_setup which overrides the user managed setting. Fixes: d69faad76584c ("selftests: fib_tests: Add prefix route tests with metric") Signed-off-by: David Ahern <dsahern(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/fib_tests.sh | 94 ++++++++++-------------- 1 file changed, 40 insertions(+), 54 deletions(-) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index a4ccde0e473b..2f190aa8fc5f 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -602,6 +602,39 @@ run_cmd() return $rc } +check_expected() +{ + local out="$1" + local expected="$2" + local rc=0 + + [ "${out}" = "${expected}" ] && return 0 + + if [ -z "${out}" ]; then + if [ "$VERBOSE" = "1" ]; then + printf "\nNo route entry found\n" + printf "Expected:\n" + printf " ${expected}\n" + fi + return 1 + fi + + # tricky way to convert output to 1-line without ip's + # messy '\'; this drops all extra white space + out=$(echo ${out}) + if [ "${out}" != "${expected}" ]; then + rc=1 + if [ "${VERBOSE}" = "1" ]; then + printf " Unexpected route entry. Have:\n" + printf " ${out}\n" + printf " Expected:\n" + printf " ${expected}\n\n" + fi + fi + + return $rc +} + # add route for a prefix, flushing any existing routes first # expected to be the first step of a test add_route6() @@ -646,31 +679,7 @@ check_route6() local rc=0 out=$($IP -6 ro ls match ${pfx} | sed -e 's/ pref medium//') - [ "${out}" = "${expected}" ] && return 0 - - if [ -z "${out}" ]; then - if [ "$VERBOSE" = "1" ]; then - printf "\nNo route entry found\n" - printf "Expected:\n" - printf " ${expected}\n" - fi - return 1 - fi - - # tricky way to convert output to 1-line without ip's - # messy '\'; this drops all extra white space - out=$(echo ${out}) - if [ "${out}" != "${expected}" ]; then - rc=1 - if [ "${VERBOSE}" = "1" ]; then - printf " Unexpected route entry. Have:\n" - printf " ${out}\n" - printf " Expected:\n" - printf " ${expected}\n\n" - fi - fi - - return $rc + check_expected "${out}" "${expected}" } route_cleanup() @@ -714,7 +723,7 @@ route_setup() $IP addr add 172.16.103.2/24 dev veth4 $IP addr add 172.16.104.1/24 dev dummy1 - set +ex + set +e } # assumption is that basic add of a single path route works @@ -949,7 +958,8 @@ ipv6_addr_metric_test() run_cmd "$IP li set dev dummy2 down" rc=$? if [ $rc -eq 0 ]; then - check_route6 "" + out=$($IP -6 ro ls match 2001:db8:104::/64) + check_expected "${out}" "" rc=$? fi log_test $rc 0 "Prefix route removed on link down" @@ -1009,34 +1019,9 @@ check_route() local pfx="172.16.104.0/24" local expected="$1" local out - local rc=0 out=$($IP ro ls match ${pfx}) - [ "${out}" = "${expected}" ] && return 0 - - if [ -z "${out}" ]; then - if [ "$VERBOSE" = "1" ]; then - printf "\nNo route entry found\n" - printf "Expected:\n" - printf " ${expected}\n" - fi - return 1 - fi - - # tricky way to convert output to 1-line without ip's - # messy '\'; this drops all extra white space - out=$(echo ${out}) - if [ "${out}" != "${expected}" ]; then - rc=1 - if [ "${VERBOSE}" = "1" ]; then - printf " Unexpected route entry. Have:\n" - printf " ${out}\n" - printf " Expected:\n" - printf " ${expected}\n\n" - fi - fi - - return $rc + check_expected "${out}" "${expected}" } # assumption is that basic add of a single path route works @@ -1301,7 +1286,8 @@ ipv4_addr_metric_test() run_cmd "$IP li set dev dummy2 down" rc=$? if [ $rc -eq 0 ]; then - check_route "" + out=$($IP ro ls match 172.16.104.0/24) + check_expected "${out}" "" rc=$? fi log_test $rc 0 "Prefix route removed on link down" -- 2.20.1

6 years, 7 months

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[PATCH AUTOSEL 5.0 73/99] selftests/net: correct the return value for run_afpackettests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 8c03557c3f25271e62e39154af66ebdd1b59c9ca ] The run_afpackettests will be marked as passed regardless the return value of those sub-tests in the script: -------------------- running psock_tpacket test -------------------- [FAIL] selftests: run_afpackettests [PASS] Fix this by changing the return value for each tests. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_afpackettests | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/net/run_afpackettests b/tools/testing/selftests/net/run_afpackettests index 2dc95fda7ef7..ea5938ec009a 100755 --- a/tools/testing/selftests/net/run_afpackettests +++ b/tools/testing/selftests/net/run_afpackettests @@ -6,12 +6,14 @@ if [ $(id -u) != 0 ]; then exit 0 fi +ret=0 echo "--------------------" echo "running psock_fanout test" echo "--------------------" ./in_netns.sh ./psock_fanout if [ $? -ne 0 ]; then echo "[FAIL]" + ret=1 else echo "[PASS]" fi @@ -22,6 +24,7 @@ echo "--------------------" ./in_netns.sh ./psock_tpacket if [ $? -ne 0 ]; then echo "[FAIL]" + ret=1 else echo "[PASS]" fi @@ -32,6 +35,8 @@ echo "--------------------" ./in_netns.sh ./txring_overwrite if [ $? -ne 0 ]; then echo "[FAIL]" + ret=1 else echo "[PASS]" fi +exit $ret -- 2.20.1

6 years, 7 months

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[PATCH AUTOSEL 5.0 72/99] selftests/net: correct the return value for run_netsocktests

by Sasha Levin

From: Po-Hsu Lin <po-hsu.lin(a)canonical.com> [ Upstream commit 30c04d796b693e22405c38e9b78e9a364e4c77e6 ] The run_netsocktests will be marked as passed regardless the actual test result from the ./socket: selftests: net: run_netsocktests ======================================== -------------------- running socket test -------------------- [FAIL] ok 1..6 selftests: net: run_netsocktests [PASS] This is because the test script itself has been successfully executed. Fix this by exit 1 when the test failed. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/run_netsocktests | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/run_netsocktests b/tools/testing/selftests/net/run_netsocktests index b093f39c298c..14e41faf2c57 100755 --- a/tools/testing/selftests/net/run_netsocktests +++ b/tools/testing/selftests/net/run_netsocktests @@ -7,7 +7,7 @@ echo "--------------------" ./socket if [ $? -ne 0 ]; then echo "[FAIL]" + exit 1 else echo "[PASS]" fi - -- 2.20.1

6 years, 7 months

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[PATCH AUTOSEL 5.0 65/99] netfilter: nat: fix icmp id randomization

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit 5bdac418f33f60b07a34e01e722889140ee8fac9 ] Sven Auhagen reported that a 2nd ping request will fail if 'fully-random' mode is used. Reason is that if no proto information is given, min/max are both 0, so we set the icmp id to 0 instead of chosing a random value between 0 and 65535. Update test case as well to catch this, without fix this yields: [..] ERROR: cannot ping ns1 from ns2 with ip masquerade fully-random (attempt 2) ERROR: cannot ping ns1 from ns2 with ipv6 masquerade fully-random (attempt 2) ... becaus 2nd ping clashes with existing 'id 0' icmp conntrack and gets dropped. Fixes: 203f2e78200c27e ("netfilter: nat: remove l4proto->unique_tuple") Reported-by: Sven Auhagen <sven.auhagen(a)voleatech.de> Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- net/netfilter/nf_nat_core.c | 11 ++++-- tools/testing/selftests/netfilter/nft_nat.sh | 36 +++++++++++++++----- 2 files changed, 35 insertions(+), 12 deletions(-) diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c index d159e9e7835b..ade527565127 100644 --- a/net/netfilter/nf_nat_core.c +++ b/net/netfilter/nf_nat_core.c @@ -358,9 +358,14 @@ static void nf_nat_l4proto_unique_tuple(struct nf_conntrack_tuple *tuple, case IPPROTO_ICMPV6: /* id is same for either direction... */ keyptr = &tuple->src.u.icmp.id; - min = range->min_proto.icmp.id; - range_size = ntohs(range->max_proto.icmp.id) - - ntohs(range->min_proto.icmp.id) + 1; + if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED)) { + min = 0; + range_size = 65536; + } else { + min = ntohs(range->min_proto.icmp.id); + range_size = ntohs(range->max_proto.icmp.id) - + ntohs(range->min_proto.icmp.id) + 1; + } goto find_free_id; #if IS_ENABLED(CONFIG_NF_CT_PROTO_GRE) case IPPROTO_GRE: diff --git a/tools/testing/selftests/netfilter/nft_nat.sh b/tools/testing/selftests/netfilter/nft_nat.sh index 8ec76681605c..3194007cf8d1 100755 --- a/tools/testing/selftests/netfilter/nft_nat.sh +++ b/tools/testing/selftests/netfilter/nft_nat.sh @@ -321,6 +321,7 @@ EOF test_masquerade6() { + local natflags=$1 local lret=0 ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null @@ -354,13 +355,13 @@ ip netns exec ns0 nft -f - <<EOF table ip6 nat { chain postrouting { type nat hook postrouting priority 0; policy accept; - meta oif veth0 masquerade + meta oif veth0 masquerade $natflags } } EOF ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1 if [ $? -ne 0 ] ; then - echo "ERROR: cannot ping ns1 from ns2 with active ipv6 masquerading" + echo "ERROR: cannot ping ns1 from ns2 with active ipv6 masquerade $natflags" lret=1 fi @@ -397,19 +398,26 @@ EOF fi done + ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1 + if [ $? -ne 0 ] ; then + echo "ERROR: cannot ping ns1 from ns2 with active ipv6 masquerade $natflags (attempt 2)" + lret=1 + fi + ip netns exec ns0 nft flush chain ip6 nat postrouting if [ $? -ne 0 ]; then echo "ERROR: Could not flush ip6 nat postrouting" 1>&2 lret=1 fi - test $lret -eq 0 && echo "PASS: IPv6 masquerade for ns2" + test $lret -eq 0 && echo "PASS: IPv6 masquerade $natflags for ns2" return $lret } test_masquerade() { + local natflags=$1 local lret=0 ip netns exec ns0 sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null @@ -417,7 +425,7 @@ test_masquerade() ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1 if [ $? -ne 0 ] ; then - echo "ERROR: canot ping ns1 from ns2" + echo "ERROR: cannot ping ns1 from ns2 $natflags" lret=1 fi @@ -443,13 +451,13 @@ ip netns exec ns0 nft -f - <<EOF table ip nat { chain postrouting { type nat hook postrouting priority 0; policy accept; - meta oif veth0 masquerade + meta oif veth0 masquerade $natflags } } EOF ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1 if [ $? -ne 0 ] ; then - echo "ERROR: cannot ping ns1 from ns2 with active ip masquerading" + echo "ERROR: cannot ping ns1 from ns2 with active ip masquere $natflags" lret=1 fi @@ -485,13 +493,19 @@ EOF fi done + ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1 + if [ $? -ne 0 ] ; then + echo "ERROR: cannot ping ns1 from ns2 with active ip masquerade $natflags (attempt 2)" + lret=1 + fi + ip netns exec ns0 nft flush chain ip nat postrouting if [ $? -ne 0 ]; then echo "ERROR: Could not flush nat postrouting" 1>&2 lret=1 fi - test $lret -eq 0 && echo "PASS: IP masquerade for ns2" + test $lret -eq 0 && echo "PASS: IP masquerade $natflags for ns2" return $lret } @@ -750,8 +764,12 @@ test_local_dnat test_local_dnat6 reset_counters -test_masquerade -test_masquerade6 +test_masquerade "" +test_masquerade6 "" + +reset_counters +test_masquerade "fully-random" +test_masquerade6 "fully-random" reset_counters test_redirect -- 2.20.1

6 years, 7 months

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[PATCH AUTOSEL 5.0 61/99] selftests: netfilter: check icmp pkttoobig errors are set as related

by Sasha Levin

From: Florian Westphal <fw(a)strlen.de> [ Upstream commit becf2319f320cae43e20cf179cc51a355a0deb5f ] When an icmp error such as pkttoobig is received, conntrack checks if the "inner" header (header of packet that did not fit link mtu) is matches an existing connection, and, if so, sets that packet as being related to the conntrack entry it found. It was recently reported that this "related" setting also works if the inner header is from another, different connection (i.e., artificial/forged icmp error). Add a test, followup patch will add additional "inner dst matches outer dst in reverse direction" check before setting related state. Link: https://www.synacktiv.com/posts/systems/icmp-reachable.html Signed-off-by: Florian Westphal <fw(a)strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo(a)netfilter.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/netfilter/Makefile | 2 +- .../netfilter/conntrack_icmp_related.sh | 283 ++++++++++++++++++ 2 files changed, 284 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/netfilter/conntrack_icmp_related.sh diff --git a/tools/testing/selftests/netfilter/Makefile b/tools/testing/selftests/netfilter/Makefile index c9ff2b47bd1c..a37cb1192c6a 100644 --- a/tools/testing/selftests/netfilter/Makefile +++ b/tools/testing/selftests/netfilter/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for netfilter selftests -TEST_PROGS := nft_trans_stress.sh nft_nat.sh +TEST_PROGS := nft_trans_stress.sh nft_nat.sh conntrack_icmp_related.sh include ../lib.mk diff --git a/tools/testing/selftests/netfilter/conntrack_icmp_related.sh b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh new file mode 100755 index 000000000000..b48e1833bc89 --- /dev/null +++ b/tools/testing/selftests/netfilter/conntrack_icmp_related.sh @@ -0,0 +1,283 @@ +#!/bin/bash +# +# check that ICMP df-needed/pkttoobig icmp are set are set as related +# state +# +# Setup is: +# +# nsclient1 -> nsrouter1 -> nsrouter2 -> nsclient2 +# MTU 1500, except for nsrouter2 <-> nsclient2 link (1280). +# ping nsclient2 from nsclient1, checking that conntrack did set RELATED +# 'fragmentation needed' icmp packet. +# +# In addition, nsrouter1 will perform IP masquerading, i.e. also +# check the icmp errors are propagated to the correct host as per +# nat of "established" icmp-echo "connection". + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +ret=0 + +nft --version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without nft tool" + exit $ksft_skip +fi + +ip -Version > /dev/null 2>&1 +if [ $? -ne 0 ];then + echo "SKIP: Could not run test without ip tool" + exit $ksft_skip +fi + +cleanup() { + for i in 1 2;do ip netns del nsclient$i;done + for i in 1 2;do ip netns del nsrouter$i;done +} + +ipv4() { + echo -n 192.168.$1.2 +} + +ipv6 () { + echo -n dead:$1::2 +} + +check_counter() +{ + ns=$1 + name=$2 + expect=$3 + local lret=0 + + cnt=$(ip netns exec $ns nft list counter inet filter "$name" | grep -q "$expect") + if [ $? -ne 0 ]; then + echo "ERROR: counter $name in $ns has unexpected value (expected $expect)" 1>&2 + ip netns exec $ns nft list counter inet filter "$name" 1>&2 + lret=1 + fi + + return $lret +} + +check_unknown() +{ + expect="packets 0 bytes 0" + for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + check_counter $n "unknown" "$expect" + if [ $? -ne 0 ] ;then + return 1 + fi + done + + return 0 +} + +for n in nsclient1 nsclient2 nsrouter1 nsrouter2; do + ip netns add $n + ip -net $n link set lo up +done + +DEV=veth0 +ip link add $DEV netns nsclient1 type veth peer name eth1 netns nsrouter1 +DEV=veth0 +ip link add $DEV netns nsclient2 type veth peer name eth1 netns nsrouter2 + +DEV=veth0 +ip link add $DEV netns nsrouter1 type veth peer name eth2 netns nsrouter2 + +DEV=veth0 +for i in 1 2; do + ip -net nsclient$i link set $DEV up + ip -net nsclient$i addr add $(ipv4 $i)/24 dev $DEV + ip -net nsclient$i addr add $(ipv6 $i)/64 dev $DEV +done + +ip -net nsrouter1 link set eth1 up +ip -net nsrouter1 link set veth0 up + +ip -net nsrouter2 link set eth1 up +ip -net nsrouter2 link set eth2 up + +ip -net nsclient1 route add default via 192.168.1.1 +ip -net nsclient1 -6 route add default via dead:1::1 + +ip -net nsclient2 route add default via 192.168.2.1 +ip -net nsclient2 route add default via dead:2::1 + +i=3 +ip -net nsrouter1 addr add 192.168.1.1/24 dev eth1 +ip -net nsrouter1 addr add 192.168.3.1/24 dev veth0 +ip -net nsrouter1 addr add dead:1::1/64 dev eth1 +ip -net nsrouter1 addr add dead:3::1/64 dev veth0 +ip -net nsrouter1 route add default via 192.168.3.10 +ip -net nsrouter1 -6 route add default via dead:3::10 + +ip -net nsrouter2 addr add 192.168.2.1/24 dev eth1 +ip -net nsrouter2 addr add 192.168.3.10/24 dev eth2 +ip -net nsrouter2 addr add dead:2::1/64 dev eth1 +ip -net nsrouter2 addr add dead:3::10/64 dev eth2 +ip -net nsrouter2 route add default via 192.168.3.1 +ip -net nsrouter2 route add default via dead:3::1 + +sleep 2 +for i in 4 6; do + ip netns exec nsrouter1 sysctl -q net.ipv$i.conf.all.forwarding=1 + ip netns exec nsrouter2 sysctl -q net.ipv$i.conf.all.forwarding=1 +done + +for netns in nsrouter1 nsrouter2; do +ip netns exec $netns nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain forward { + type filter hook forward priority 0; policy accept; + meta l4proto icmpv6 icmpv6 type "packet-too-big" ct state "related" counter name "related" accept + meta l4proto icmp icmp type "destination-unreachable" ct state "related" counter name "related" accept + meta l4proto { icmp, icmpv6 } ct state new,established accept + counter name "unknown" drop + } +} +EOF +done + +ip netns exec nsclient1 nft -f - <<EOF +table inet filter { + counter unknown { } + counter related { } + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "related" counter name "related" accept + counter name "unknown" drop + } +} +EOF + +ip netns exec nsclient2 nft -f - <<EOF +table inet filter { + counter unknown { } + counter new { } + counter established { } + + chain input { + type filter hook input priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" accept + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" accept + counter name "unknown" drop + } + chain output { + type filter hook output priority 0; policy accept; + meta l4proto { icmp, icmpv6 } ct state established,untracked accept + + meta l4proto { icmp, icmpv6 } ct state "new" counter name "new" + meta l4proto { icmp, icmpv6 } ct state "established" counter name "established" + counter name "unknown" drop + } +} +EOF + + +# make sure NAT core rewrites adress of icmp error if nat is used according to +# conntrack nat information (icmp error will be directed at nsrouter1 address, +# but it needs to be routed to nsclient1 address). +ip netns exec nsrouter1 nft -f - <<EOF +table ip nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip protocol icmp oifname "veth0" counter masquerade + } +} +table ip6 nat { + chain postrouting { + type nat hook postrouting priority 0; policy accept; + ip6 nexthdr icmpv6 oifname "veth0" counter masquerade + } +} +EOF + +ip netns exec nsrouter2 ip link set eth1 mtu 1280 +ip netns exec nsclient2 ip link set veth0 mtu 1280 +sleep 1 + +ip netns exec nsclient1 ping -c 1 -s 1000 -q -M do 192.168.2.2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ip routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi +ip netns exec nsclient1 ping6 -q -c 1 -s 1000 dead:2::2 >/dev/null +if [ $? -ne 0 ]; then + echo "ERROR: netns ipv6 routing/connectivity broken" 1>&2 + cleanup + exit 1 +fi + +check_unknown +if [ $? -ne 0 ]; then + ret=1 +fi + +expect="packets 0 bytes 0" +for netns in nsrouter1 nsrouter2 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +expect="packets 2 bytes 2076" +check_counter nsclient2 "new" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +ip netns exec nsclient1 ping -q -c 1 -s 1300 -M do 192.168.2.2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +# nsrouter2 should have generated the icmp error, so +# related counter should be 0 (its in forward). +expect="packets 0 bytes 0" +check_counter "nsrouter2" "related" "$expect" +if [ $? -ne 0 ]; then + ret=1 +fi + +# but nsrouter1 should have seen it, same for nsclient1. +expect="packets 1 bytes 576" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +ip netns exec nsclient1 ping6 -c 1 -s 1300 dead:2::2 > /dev/null +if [ $? -eq 0 ]; then + echo "ERROR: ping6 should have failed with PMTU too big error" 1>&2 + ret=1 +fi + +expect="packets 2 bytes 1856" +for netns in nsrouter1 nsclient1;do + check_counter "$netns" "related" "$expect" + if [ $? -ne 0 ]; then + ret=1 + fi +done + +if [ $ret -eq 0 ];then + echo "PASS: icmp mtu error had RELATED state" +else + echo "ERROR: icmp error RELATED state test has failed" +fi + +cleanup +exit $ret -- 2.20.1

6 years, 7 months

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[PATCH AUTOSEL 5.0 26/99] selftests: fib_tests: Fix 'Command line is not complete' errors

by Sasha Levin

From: David Ahern <dsahern(a)gmail.com> [ Upstream commit a5f622984a623df9a84cf43f6b098d8dd76fbe05 ] A couple of tests are verifying a route has been removed. The helper expects the prefix as the first part of the expected output. When checking that a route has been deleted the prefix is empty leading to an invalid ip command: $ ip ro ls match Command line is not complete. Try option "help" Fix by moving the comparison of expected output and output to a new function that is used by both check_route and check_route6. Use the new helper for the 2 checks on route removal. Also, remove the reset of 'set -x' in route_setup which overrides the user managed setting. Fixes: d69faad76584c ("selftests: fib_tests: Add prefix route tests with metric") Signed-off-by: David Ahern <dsahern(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/fib_tests.sh | 94 ++++++++++-------------- 1 file changed, 40 insertions(+), 54 deletions(-) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 1080ff55a788..0d2a5f4f1e63 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -605,6 +605,39 @@ run_cmd() return $rc } +check_expected() +{ + local out="$1" + local expected="$2" + local rc=0 + + [ "${out}" = "${expected}" ] && return 0 + + if [ -z "${out}" ]; then + if [ "$VERBOSE" = "1" ]; then + printf "\nNo route entry found\n" + printf "Expected:\n" + printf " ${expected}\n" + fi + return 1 + fi + + # tricky way to convert output to 1-line without ip's + # messy '\'; this drops all extra white space + out=$(echo ${out}) + if [ "${out}" != "${expected}" ]; then + rc=1 + if [ "${VERBOSE}" = "1" ]; then + printf " Unexpected route entry. Have:\n" + printf " ${out}\n" + printf " Expected:\n" + printf " ${expected}\n\n" + fi + fi + + return $rc +} + # add route for a prefix, flushing any existing routes first # expected to be the first step of a test add_route6() @@ -652,31 +685,7 @@ check_route6() pfx=$1 out=$($IP -6 ro ls match ${pfx} | sed -e 's/ pref medium//') - [ "${out}" = "${expected}" ] && return 0 - - if [ -z "${out}" ]; then - if [ "$VERBOSE" = "1" ]; then - printf "\nNo route entry found\n" - printf "Expected:\n" - printf " ${expected}\n" - fi - return 1 - fi - - # tricky way to convert output to 1-line without ip's - # messy '\'; this drops all extra white space - out=$(echo ${out}) - if [ "${out}" != "${expected}" ]; then - rc=1 - if [ "${VERBOSE}" = "1" ]; then - printf " Unexpected route entry. Have:\n" - printf " ${out}\n" - printf " Expected:\n" - printf " ${expected}\n\n" - fi - fi - - return $rc + check_expected "${out}" "${expected}" } route_cleanup() @@ -725,7 +734,7 @@ route_setup() ip -netns ns2 addr add 172.16.103.2/24 dev veth4 ip -netns ns2 addr add 172.16.104.1/24 dev dummy1 - set +ex + set +e } # assumption is that basic add of a single path route works @@ -960,7 +969,8 @@ ipv6_addr_metric_test() run_cmd "$IP li set dev dummy2 down" rc=$? if [ $rc -eq 0 ]; then - check_route6 "" + out=$($IP -6 ro ls match 2001:db8:104::/64) + check_expected "${out}" "" rc=$? fi log_test $rc 0 "Prefix route removed on link down" @@ -1091,38 +1101,13 @@ check_route() local pfx local expected="$1" local out - local rc=0 set -- $expected pfx=$1 [ "${pfx}" = "unreachable" ] && pfx=$2 out=$($IP ro ls match ${pfx}) - [ "${out}" = "${expected}" ] && return 0 - - if [ -z "${out}" ]; then - if [ "$VERBOSE" = "1" ]; then - printf "\nNo route entry found\n" - printf "Expected:\n" - printf " ${expected}\n" - fi - return 1 - fi - - # tricky way to convert output to 1-line without ip's - # messy '\'; this drops all extra white space - out=$(echo ${out}) - if [ "${out}" != "${expected}" ]; then - rc=1 - if [ "${VERBOSE}" = "1" ]; then - printf " Unexpected route entry. Have:\n" - printf " ${out}\n" - printf " Expected:\n" - printf " ${expected}\n\n" - fi - fi - - return $rc + check_expected "${out}" "${expected}" } # assumption is that basic add of a single path route works @@ -1387,7 +1372,8 @@ ipv4_addr_metric_test() run_cmd "$IP li set dev dummy2 down" rc=$? if [ $rc -eq 0 ]; then - check_route "" + out=$($IP ro ls match 172.16.104.0/24) + check_expected "${out}" "" rc=$? fi log_test $rc 0 "Prefix route removed on link down" -- 2.20.1

6 years, 7 months

1
0
0 0

[GIT PULL] Kselftest update for Linux 5.2-rc1

by Shuah Khan

Hi Linus, Please pull the following Kselftest update for Linux 5.2-rc1 This Kselftest update for Linux 5.2-rc1 consists of - fixes to seccomp test, and kselftest framework - cleanups to remove duplicate header defines - fixes to efivarfs "make clean" target - cgroup cleanup path - Moving the IMA kexec_load selftest to selftests/kexec work from Mimi Johar and Petr Vorel - A framework to kselftest for writing kernel test modules addition from Tobin C. Harding diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 15ade5d2e7775667cf191cf2f94327a4889f8b9d: Linux 5.1-rc4 (2019-04-07 14:09:59 -1000) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-5.2-rc1 for you to fetch changes up to d917fb876f6eaeeea8a2b620d2a266ce26372f4d: selftests: build and run gpio when output directory is the src dir (2019-04-22 17:02:26 -0600) ---------------------------------------------------------------- linux-kselftest-5.2-rc1 This Kselftest update for Linux 5.2-rc1 consists of - fixes to seccomp test, and kselftest framework - cleanups to remove duplicate header defines - fixes to efivarfs "make clean" target - cgroup cleanup path - Moving the IMA kexec_load selftest to selftests/kexec work from Mimi Johar and Petr Vorel - A framework to kselftest for writing kernel test modules addition from Tobin C. Harding ---------------------------------------------------------------- Kees Cook (3): selftests/seccomp: Handle namespace failures gracefully selftests/harness: Add 30 second timeout per test selftests/ipc: Fix msgque compiler warnings Mathieu Desnoyers (1): rseq/selftests: Adapt number of threads to the number of detected cpus Mimi Zohar (9): selftests/kexec: move the IMA kexec_load selftest to selftests/kexec selftests/kexec: cleanup the kexec selftest selftests/kexec: define a set of common functions selftests/kexec: define common logging functions selftests/kexec: define "require_root_privileges" selftests/kexec: kexec_file_load syscall test selftests/kexec: check kexec_load and kexec_file_load are enabled selftests/kexec: make kexec_load test independent of IMA being enabled selftests/kexec: update get_secureboot_mode Petr Vorel (1): selftests/kexec: Add missing '=y' to config options Po-Hsu Lin (1): selftests/efivarfs: clean up test files from test_create*() Roman Gushchin (1): selftests: cgroup: fix cleanup path in test_memcg_subtree_control() Sabyasachi Gupta (4): selftest/x86/mpx-dig.c: Remove duplicate header selftest/timers: Remove duplicate header selftest/rseq: Remove duplicate header selftest/gpio: Remove duplicate header Shuah Khan (2): selftests: fix headers_install circular dependency selftests: build and run gpio when output directory is the src dir Tobin C. Harding (6): lib/test_printf: Add empty module_exit function kselftest: Add test runner creation script kselftest: Add test module framework header lib: Use new kselftest header lib/string: Add strscpy_pad() function lib: Add test module for strscpy_pad ZhangXiaoxu (1): selftests: efivarfs: remove the test_create_read file if it was exist Documentation/dev-tools/kselftest.rst | 94 ++++++++- include/linux/string.h | 4 + lib/Kconfig.debug | 3 + lib/Makefile | 1 + lib/string.c | 47 ++++- lib/test_bitmap.c | 20 +- lib/test_printf.c | 17 +- lib/test_strscpy.c | 150 ++++++++++++++ tools/testing/selftests/Makefile | 63 +++++- tools/testing/selftests/cgroup/test_memcontrol.c | 38 ++-- tools/testing/selftests/efivarfs/efivarfs.sh | 28 ++- tools/testing/selftests/gpio/gpio-mockup-chardev.c | 1 - tools/testing/selftests/ima/config | 4 - tools/testing/selftests/ima/test_kexec_load.sh | 54 ----- tools/testing/selftests/ipc/msgque.c | 11 +- tools/testing/selftests/{ima => kexec}/Makefile | 5 +- tools/testing/selftests/kexec/config | 3 + tools/testing/selftests/kexec/kexec_common_lib.sh | 220 +++++++++++++++++++++ .../selftests/kexec/test_kexec_file_load.sh | 208 +++++++++++++++++++ tools/testing/selftests/kexec/test_kexec_load.sh | 47 +++++ tools/testing/selftests/kselftest_harness.h | 2 + tools/testing/selftests/kselftest_module.h | 48 +++++ tools/testing/selftests/kselftest_module.sh | 84 ++++++++ tools/testing/selftests/lib.mk | 38 +++- tools/testing/selftests/lib/Makefile | 2 +- tools/testing/selftests/lib/bitmap.sh | 18 +- tools/testing/selftests/lib/config | 1 + tools/testing/selftests/lib/prime_numbers.sh | 17 +- tools/testing/selftests/lib/printf.sh | 19 +- tools/testing/selftests/lib/strscpy.sh | 3 + tools/testing/selftests/rseq/rseq.h | 1 - tools/testing/selftests/rseq/run_param_test.sh | 7 +- tools/testing/selftests/seccomp/seccomp_bpf.c | 43 ++-- tools/testing/selftests/timers/skew_consistency.c | 1 - tools/testing/selftests/x86/mpx-dig.c | 2 - 35 files changed, 1081 insertions(+), 223 deletions(-) create mode 100644 lib/test_strscpy.c delete mode 100644 tools/testing/selftests/ima/config delete mode 100755 tools/testing/selftests/ima/test_kexec_load.sh rename tools/testing/selftests/{ima => kexec}/Makefile (59%) create mode 100644 tools/testing/selftests/kexec/config create mode 100755 tools/testing/selftests/kexec/kexec_common_lib.sh create mode 100755 tools/testing/selftests/kexec/test_kexec_file_load.sh create mode 100755 tools/testing/selftests/kexec/test_kexec_load.sh create mode 100644 tools/testing/selftests/kselftest_module.h create mode 100755 tools/testing/selftests/kselftest_module.sh create mode 100755 tools/testing/selftests/lib/strscpy.sh ----------------------------------------------------------------

6 years, 7 months

2
1
0 0

[PATCH v14 00/17] arm64: untag user pointers passed to the kernel

by Andrey Konovalov

=== Overview arm64 has a feature called Top Byte Ignore, which allows to embed pointer tags into the top byte of each pointer. Userspace programs (such as HWASan, a memory debugging tool [1]) might use this feature and pass tagged user pointers to the kernel through syscalls or other interfaces. Right now the kernel is already able to handle user faults with tagged pointers, due to these patches: 1. 81cddd65 ("arm64: traps: fix userspace cache maintenance emulation on a tagged pointer") 2. 7dcd9dd8 ("arm64: hw_breakpoint: fix watchpoint matching for tagged pointers") 3. 276e9327 ("arm64: entry: improve data abort handling of tagged pointers") This patchset extends tagged pointer support to syscall arguments. As per the proposed ABI change [3], tagged pointers are only allowed to be passed to syscalls when they point to memory ranges obtained by anonymous mmap() or sbrk() (see the patchset [3] for more details). For non-memory syscalls this is done by untaging user pointers when the kernel performs pointer checking to find out whether the pointer comes from userspace (most notably in access_ok). The untagging is done only when the pointer is being checked, the tag is preserved as the pointer makes its way through the kernel and stays tagged when the kernel dereferences the pointer when perfoming user memory accesses. Memory syscalls (mmap, mprotect, etc.) don't do user memory accesses but rather deal with memory ranges, and untagged pointers are better suited to describe memory ranges internally. Thus for memory syscalls we untag pointers completely when they enter the kernel. === Other approaches One of the alternative approaches to untagging that was considered is to completely strip the pointer tag as the pointer enters the kernel with some kind of a syscall wrapper, but that won't work with the countless number of different ioctl calls. With this approach we would need a custom wrapper for each ioctl variation, which doesn't seem practical. An alternative approach to untagging pointers in memory syscalls prologues is to inspead allow tagged pointers to be passed to find_vma() (and other vma related functions) and untag them there. Unfortunately, a lot of find_vma() callers then compare or subtract the returned vma start and end fields against the pointer that was being searched. Thus this approach would still require changing all find_vma() callers. === Testing The following testing approaches has been taken to find potential issues with user pointer untagging: 1. Static testing (with sparse [2] and separately with a custom static analyzer based on Clang) to track casts of __user pointers to integer types to find places where untagging needs to be done. 2. Static testing with grep to find parts of the kernel that call find_vma() (and other similar functions) or directly compare against vm_start/vm_end fields of vma. 3. Static testing with grep to find parts of the kernel that compare user pointers with TASK_SIZE or other similar consts and macros. 4. Dynamic testing: adding BUG_ON(has_tag(addr)) to find_vma() and running a modified syzkaller version that passes tagged pointers to the kernel. Based on the results of the testing the requried patches have been added to the patchset. === Notes This patchset is meant to be merged together with "arm64 relaxed ABI" [3]. This patchset is a prerequisite for ARM's memory tagging hardware feature support [4]. This patchset has been merged into the Pixel 2 & 3 kernel trees and is now being used to enable testing of Pixel phones with HWASan. Thanks! [1] http://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html [2] https://github.com/lucvoo/sparse-dev/commit/5f960cb10f56ec2017c128ef9d16060… [3] https://lkml.org/lkml/2019/3/18/819 [4] https://community.arm.com/processors/b/blog/posts/arm-a-profile-architectur… Changes in v14: - Moved untagging for most memory syscalls to an arm64 specific implementation, instead of doing that in the common code. - Dropped "net, arm64: untag user pointers in tcp_zerocopy_receive", since the provided user pointers don't come from an anonymous map and thus are not covered by this ABI relaxation. - Dropped "kernel, arm64: untag user pointers in prctl_set_mm*". - Moved untagging from __check_mem_type() to tee_shm_register(). - Updated untagging for the amdgpu and radeon drivers to cover the MMU notifier, as suggested by Felix. - Since this ABI relaxation doesn't actually allow tagged instruction pointers, dropped the following patches: - Dropped "tracing, arm64: untag user pointers in seq_print_user_ip". - Dropped "uprobes, arm64: untag user pointers in find_active_uprobe". - Dropped "bpf, arm64: untag user pointers in stack_map_get_build_id_offset". - Rebased onto 5.1-rc7 (37624b58). Changes in v13: - Simplified untagging in tcp_zerocopy_receive(). - Looked at find_vma() callers in drivers/, which allowed to identify a few other places where untagging is needed. - Added patch "mm, arm64: untag user pointers in get_vaddr_frames". - Added patch "drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages". - Added patch "drm/radeon, arm64: untag user pointers in radeon_ttm_tt_pin_userptr". - Added patch "IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr". - Added patch "media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get". - Added patch "tee/optee, arm64: untag user pointers in check_mem_type". - Added patch "vfio/type1, arm64: untag user pointers". Changes in v12: - Changed untagging in tcp_zerocopy_receive() to also untag zc->address. - Fixed untagging in prctl_set_mm* to only untag pointers for vma lookups and validity checks, but leave them as is for actual user space accesses. - Updated the link to the v2 of the "arm64 relaxed ABI" patchset [3]. - Dropped the documentation patch, as the "arm64 relaxed ABI" patchset [3] handles that. Changes in v11: - Added "uprobes, arm64: untag user pointers in find_active_uprobe" patch. - Added "bpf, arm64: untag user pointers in stack_map_get_build_id_offset" patch. - Fixed "tracing, arm64: untag user pointers in seq_print_user_ip" to correctly perform subtration with a tagged addr. - Moved untagged_addr() from SYSCALL_DEFINE3(mprotect) and SYSCALL_DEFINE4(pkey_mprotect) to do_mprotect_pkey(). - Moved untagged_addr() definition for other arches from include/linux/memory.h to include/linux/mm.h. - Changed untagging in strn*_user() to perform userspace accesses through tagged pointers. - Updated the documentation to mention that passing tagged pointers to memory syscalls is allowed. - Updated the test to use malloc'ed memory instead of stack memory. Changes in v10: - Added "mm, arm64: untag user pointers passed to memory syscalls" back. - New patch "fs, arm64: untag user pointers in fs/userfaultfd.c". - New patch "net, arm64: untag user pointers in tcp_zerocopy_receive". - New patch "kernel, arm64: untag user pointers in prctl_set_mm*". - New patch "tracing, arm64: untag user pointers in seq_print_user_ip". Changes in v9: - Rebased onto 4.20-rc6. - Used u64 instead of __u64 in type casts in the untagged_addr macro for arm64. - Added braces around (addr) in the untagged_addr macro for other arches. Changes in v8: - Rebased onto 65102238 (4.20-rc1). - Added a note to the cover letter on why syscall wrappers/shims that untag user pointers won't work. - Added a note to the cover letter that this patchset has been merged into the Pixel 2 kernel tree. - Documentation fixes, in particular added a list of syscalls that don't support tagged user pointers. Changes in v7: - Rebased onto 17b57b18 (4.19-rc6). - Dropped the "arm64: untag user address in __do_user_fault" patch, since the existing patches already handle user faults properly. - Dropped the "usb, arm64: untag user addresses in devio" patch, since the passed pointer must come from a vma and therefore be untagged. - Dropped the "arm64: annotate user pointers casts detected by sparse" patch (see the discussion to the replies of the v6 of this patchset). - Added more context to the cover letter. - Updated Documentation/arm64/tagged-pointers.txt. Changes in v6: - Added annotations for user pointer casts found by sparse. - Rebased onto 050cdc6c (4.19-rc1+). Changes in v5: - Added 3 new patches that add untagging to places found with static analysis. - Rebased onto 44c929e1 (4.18-rc8). Changes in v4: - Added a selftest for checking that passing tagged pointers to the kernel succeeds. - Rebased onto 81e97f013 (4.18-rc1+). Changes in v3: - Rebased onto e5c51f30 (4.17-rc6+). - Added linux-arch@ to the list of recipients. Changes in v2: - Rebased onto 2d618bdf (4.17-rc3+). - Removed excessive untagging in gup.c. - Removed untagging pointers returned from __uaccess_mask_ptr. Changes in v1: - Rebased onto 4.17-rc1. Changes in RFC v2: - Added "#ifndef untagged_addr..." fallback in linux/uaccess.h instead of defining it for each arch individually. - Updated Documentation/arm64/tagged-pointers.txt. - Dropped "mm, arm64: untag user addresses in memory syscalls". - Rebased onto 3eb2ce82 (4.16-rc7). Signed-off-by: Andrey Konovalov <andreyknvl(a)google.com> Andrey Konovalov (17): uaccess: add untagged_addr definition for other arches arm64: untag user pointers in access_ok and __uaccess_mask_ptr lib, arm64: untag user pointers in strn*_user mm: add ksys_ wrappers to memory syscalls arms64: untag user pointers passed to memory syscalls mm: untag user pointers in do_pages_move mm, arm64: untag user pointers in mm/gup.c mm, arm64: untag user pointers in get_vaddr_frames fs, arm64: untag user pointers in copy_mount_options fs, arm64: untag user pointers in fs/userfaultfd.c drm/amdgpu, arm64: untag user pointers drm/radeon, arm64: untag user pointers IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get tee, arm64: untag user pointers in tee_shm_register vfio/type1, arm64: untag user pointers in vaddr_get_pfn selftests, arm64: add a selftest for passing tagged pointers to kernel arch/arm64/include/asm/uaccess.h | 10 +- arch/arm64/kernel/sys.c | 128 ++++++++++++++++- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +- drivers/gpu/drm/radeon/radeon_gem.c | 2 + drivers/gpu/drm/radeon/radeon_ttm.c | 2 +- drivers/infiniband/hw/mlx4/mr.c | 7 +- drivers/media/v4l2-core/videobuf-dma-contig.c | 9 +- drivers/tee/tee_shm.c | 1 + drivers/vfio/vfio_iommu_type1.c | 2 + fs/namespace.c | 2 +- fs/userfaultfd.c | 5 + include/linux/mm.h | 4 + include/linux/syscalls.h | 22 +++ ipc/shm.c | 7 +- lib/strncpy_from_user.c | 3 +- lib/strnlen_user.c | 3 +- mm/frame_vector.c | 2 + mm/gup.c | 4 + mm/madvise.c | 129 +++++++++--------- mm/mempolicy.c | 21 ++- mm/migrate.c | 1 + mm/mincore.c | 57 ++++---- mm/mlock.c | 20 ++- mm/mmap.c | 30 +++- mm/mprotect.c | 6 +- mm/mremap.c | 27 ++-- mm/msync.c | 35 +++-- tools/testing/selftests/arm64/.gitignore | 1 + tools/testing/selftests/arm64/Makefile | 11 ++ .../testing/selftests/arm64/run_tags_test.sh | 12 ++ tools/testing/selftests/arm64/tags_test.c | 21 +++ 33 files changed, 431 insertions(+), 159 deletions(-) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_test.c -- 2.21.0.593.g511ec345e18-goog

6 years, 7 months

3
26
0 0

[PATCH] selftests: add sleep between detach and usbip list -l

by Shuah Khan

Add a sleep between detach and check for exportable devices to avoid the following segfault from libc-2.27.so [ 6268.136108] usbip[5565]: segfault at 0 ip 00007f2a947bddfd sp 00007ffd1a8705e8 error 4 in libc-2.27.so[7f2a94703000+1e7000] Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> --- tools/testing/selftests/drivers/usb/usbip/usbip_test.sh | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/drivers/usb/usbip/usbip_test.sh b/tools/testing/selftests/drivers/usb/usbip/usbip_test.sh index 128f0ab24307..beacf24a8df7 100755 --- a/tools/testing/selftests/drivers/usb/usbip/usbip_test.sh +++ b/tools/testing/selftests/drivers/usb/usbip/usbip_test.sh @@ -171,10 +171,14 @@ echo "Detach invalid port tests - expect invalid port error message"; src/usbip detach -p 100; echo "==============================================================" +# let detach complete. Avoid segfaults from libc-2.27.so +sleep 3; + echo "Expect to see export-able devices"; src/usbip list -l; echo "==============================================================" + echo "Remove usbip_host module"; rmmod usbip_host; -- 2.17.1

6 years, 7 months

2
4
0 0

Re: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions

by Linus Torvalds

On Fri, May 3, 2019 at 10:08 PM Linus Torvalds <torvalds(a)linux-foundation.org> wrote: > > I'll look at it tomorrow, but I think this actually makes unnecessary changes. > > In particular, I think we could keep the existing entry code almost unchanged with this whole approach. So here's what I *think* should work. Note that I also removed your test-case code, because it really didn't have a chance in hell of working. Doing that int3_emulate_call(regs, (unsigned long)&int3_magic); inside of int3_exception_notify() could not possibly be valid, since int3_emulate_call() returns the new pt_regs that need to be used, and throwing it away is clearly wrong. So you can't use a register_die_notifier() to try to intercept the 'int3' error and then do it manually, it needs to be done by the ftrace_int3_handler() code that actually returns the new regs, and where do_kernel_int3() will then return it to the low-level handler. End result: I haven't actually tested this code, but I've looked through the patch something like ten times without finding any new errors. I've also tried *very* hard to make the patch minimal, with the exception of the comments, which I tried to make extensive for any of the subtle cases. But without testing, it's probably still buggy. I have to say, I finally like the end result here. Maybe it's because I got to make my mark and pee in the snow, but I will say that (a) the actual entry code modifications really are minimal now (b) the instruction emulation really is very simple and straightforward (c) yes, we play some stack tricks (and yes, we play them differently on x86-64 and x86-32), but the tricks are again at least straightforward, and we never really change the layout of any stack. So on the whole, I think this is about as good as it gets. Did I get all the details actually right, and it _works_? I guess we'll see. Linus

6 years, 7 months

2
3
0 0

[PATCH] kheaders: Move from proc to sysfs

by Joel Fernandes (Google)

The kheaders archive consisting of the kernel headers used for compiling bpf programs is in /proc. However there is concern that moving it here will make it permanent. Let us move it to /sys/kernel as discussed [1]. [1] https://lore.kernel.org/patchwork/patch/1067310/#1265969 Suggested-by: Steven Rostedt <rostedt(a)goodmis.org> Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> --- This patch applies on top of the previous patch that was applied to the driver tree: https://lore.kernel.org/patchwork/patch/1067310/ kernel/kheaders.c | 40 ++++++++++++++++------------------------ 1 file changed, 16 insertions(+), 24 deletions(-) diff --git a/kernel/kheaders.c b/kernel/kheaders.c index 70ae6052920d..6a16f8f6898d 100644 --- a/kernel/kheaders.c +++ b/kernel/kheaders.c @@ -8,9 +8,8 @@ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/proc_fs.h> +#include <linux/kobject.h> #include <linux/init.h> -#include <linux/uaccess.h> /* * Define kernel_headers_data and kernel_headers_data_end, within which the @@ -31,39 +30,32 @@ extern char kernel_headers_data; extern char kernel_headers_data_end; static ssize_t -ikheaders_read_current(struct file *file, char __user *buf, - size_t len, loff_t *offset) +ikheaders_read(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t len) { - return simple_read_from_buffer(buf, len, offset, - &kernel_headers_data, - &kernel_headers_data_end - - &kernel_headers_data); + memcpy(buf, &kernel_headers_data + off, len); + return len; } -static const struct file_operations ikheaders_file_ops = { - .read = ikheaders_read_current, - .llseek = default_llseek, +static struct bin_attribute kheaders_attr __ro_after_init = { + .attr = { + .name = "kheaders.tar.xz", + .mode = S_IRUGO, + }, + .read = &ikheaders_read, }; static int __init ikheaders_init(void) { - struct proc_dir_entry *entry; - - /* create the current headers file */ - entry = proc_create("kheaders.tar.xz", S_IRUGO, NULL, - &ikheaders_file_ops); - if (!entry) - return -ENOMEM; - - proc_set_size(entry, - &kernel_headers_data_end - - &kernel_headers_data); - return 0; + kheaders_attr.size = (&kernel_headers_data_end - + &kernel_headers_data); + return sysfs_create_bin_file(kernel_kobj, &kheaders_attr); } static void __exit ikheaders_cleanup(void) { - remove_proc_entry("kheaders.tar.xz", NULL); + sysfs_remove_bin_file(kernel_kobj, &kheaders_attr); } module_init(ikheaders_init); -- 2.21.0.1020.gf2820cf01a-goog

6 years, 7 months

5
5
0 0

[RFC][PATCH 1.5/2] x86: Add int3_emulate_call() selftest

by Peter Zijlstra

Given that the entry_*.S changes for this functionality are somewhat tricky, make sure the paths are tested every boot, instead of on the rare occasion when we trip an INT3 while rewriting text. Getting the INT3 frame setup even slightly wrong will make this come unstuck something spectacular. Requested-by: Andy Lutomirski <luto(a)kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> --- arch/x86/kernel/alternative.c | 81 ++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 77 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 4db9c0d29bc1..2b853c2ab894 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -613,11 +613,83 @@ extern struct paravirt_patch_site __start_parainstructions[], __stop_parainstructions[]; #endif /* CONFIG_PARAVIRT */ +/* + * Self-test for the INT3 based CALL emulation code. + * + * This exercises int3_emulate_call() to make sure INT3 pt_regs are set up + * properly and that there is a stack gap between the INT3 frame and the + * previous context. Without this gap doing a virtual PUSH on the interrupted + * stack would corrupt the INT3 IRET frame. + * + * See entry_{32,64}.S for more details. + */ +static void __init int3_magic(unsigned int *ptr) +{ + *ptr = 1; +} + +extern __initdata unsigned long int3_selftest_ip; /* defined in asm below */ + +static int __init +int3_exception_notify(struct notifier_block *self, unsigned long val, void *data) +{ + struct die_args *args = data; + struct pt_regs *regs = args->regs; + + if (!regs || user_mode(regs)) + return NOTIFY_DONE; + + if (val != DIE_INT3) + return NOTIFY_DONE; + + if (regs->ip - INT3_INSN_SIZE != int3_selftest_ip) + return NOTIFY_DONE; + + int3_emulate_call(regs, (unsigned long)&int3_magic); + return NOTIFY_STOP; +} + +static void __init int3_selftest(void) +{ + static __initdata struct notifier_block int3_exception_nb = { + .notifier_call = int3_exception_notify, + .priority = INT_MAX-1, /* last */ + }; + unsigned int val = 0; + + BUG_ON(register_die_notifier(&int3_exception_nb)); + + /* + * Basically: int3_magic(&val); but really complicated :-) + * + * Stick the address of the INT3 instruction into int3_selftest_ip, + * then trigger the INT3, padded with NOPs to match a CALL instruction + * length. + */ + asm volatile ("1: int3; nop; nop; nop; nop\n\t" + ".pushsection .init.data,\"aw\"\n\t" + ".align " __ASM_SEL(4, 8) "\n\t" + ".type int3_selftest_ip, @object\n\t" + ".size int3_selftest_ip, " __ASM_SEL(4, 8) "\n\t" + "int3_selftest_ip:\n\t" + __ASM_SEL(.long, .quad) " 1b\n\t" + ".popsection\n\t" + : : __ASM_SEL_RAW(a, D) (&val) : "memory"); + + BUG_ON(val != 1); + + unregister_die_notifier(&int3_exception_nb); +} + void __init alternative_instructions(void) { - /* The patching is not fully atomic, so try to avoid local interruptions - that might execute the to be patched code. - Other CPUs are not running. */ + int3_selftest(); + + /* + * The patching is not fully atomic, so try to avoid local + * interruptions that might execute the to be patched code. + * Other CPUs are not running. + */ stop_nmi(); /* @@ -642,10 +714,11 @@ void __init alternative_instructions(void) _text, _etext); } - if (!uniproc_patched || num_possible_cpus() == 1) + if (!uniproc_patched || num_possible_cpus() == 1) { free_init_pages("SMP alternatives", (unsigned long)__smp_locks, (unsigned long)__smp_locks_end); + } #endif apply_paravirt(__parainstructions, __parainstructions_end);

6 years, 7 months

2
1
0 0

[PATCH v7 resend 1/2] Provide in-kernel headers to make extending kernel easier

by Joel Fernandes (Google)

Introduce in-kernel headers which are made available as an archive through proc (/proc/kheaders.tar.xz file). This archive makes it possible to run eBPF and other tracing programs that need to extend the kernel for tracing purposes without any dependency on the file system having headers. A github PR is sent for the corresponding BCC patch at: https://github.com/iovisor/bcc/pull/2312 On Android and embedded systems, it is common to switch kernels but not have kernel headers available on the file system. Further once a different kernel is booted, any headers stored on the file system will no longer be useful. This is an issue even well known to distros. By storing the headers as a compressed archive within the kernel, we can avoid these issues that have been a hindrance for a long time. The best way to use this feature is by building it in. Several users have a need for this, when they switch debug kernels, they do not want to update the filesystem or worry about it where to store the headers on it. However, the feature is also buildable as a module in case the user desires it not being part of the kernel image. This makes it possible to load and unload the headers from memory on demand. A tracing program can load the module, do its operations, and then unload the module to save kernel memory. The total memory needed is 3.3MB. By having the archive available at a fixed location independent of filesystem dependencies and conventions, all debugging tools can directly refer to the fixed location for the archive, without concerning with where the headers on a typical filesystem which significantly simplifies tooling that needs kernel headers. The code to read the headers is based on /proc/config.gz code and uses the same technique to embed the headers. Other approaches were discussed such as having an in-memory mountable filesystem, but that has drawbacks such as requiring an in-kernel xz decompressor which we don't have today, and requiring usage of 42 MB of kernel memory to host the decompressed headers at anytime. Also this approach is simpler than such approaches. Reviewed-by: Masahiro Yamada <yamada.masahiro(a)socionext.com> Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> --- (Just a resend with Masahiro's Reviewed-by tag added) v6 -> v7: - Minor nits from Masahiro Yamada are addressed. v5 -> v6: (Masahiro Yamada suggestions mostly) - Dropped support for module building. - Rebuild archive if script changes. - Move archive file list to script. - Move build script to kernel directory. v4 -> v5: (v4 was Tested-by the following folks) Tested-by: qais.yousef(a)arm.com Tested-by: dietmar.eggemann(a)arm.com Tested-by: linux(a)manojrajarao.com (Thanks to Masahiro Yamada for several excellent suggestions) - used incbin instead of bin2c (Masahiro did similar idea) - added module.lds if ia64 otherwise ia64 may fail to build. - added clean-files rule to Makefile - removed strip-comments script and doing it inline - added set -e to header generated to die on errorsr - fixed a minor issue where find command was noisy. - removed unneeded tar.xz rule from kernel/.gitignore - added Tested-by tags from ARM folks. Changes since v3: - Blank tar was being generated because of a one line I forgot to push. It is updated now. - Added module.lds since arm64 needs it to build modules. Changes since v2: (Thanks to Masahiro Yamada for several excellent suggestions) - Added support for out of tree builds. - Added incremental build support bringing down build time of incremental builds from 50 seconds to 5 seconds. - Fixed various small nits / cleanups. - clean ups to kheaders.c pointed by Alexey Dobriyan. - Fixed MODULE_LICENSE in test module and kheaders.c - Dropped Module.symvers from archive due to circular dependency. Changes since v1: - removed IKH_EXTRA variable, not needed (Masahiro Yamada) - small fix ups to selftest - added target to main Makefile etc - added MODULE_LICENSE to test module - made selftest more quiet Changes since RFC: Both changes bring size down to 3.8MB: - use xz for compression - strip comments except SPDX lines - Call out the module name in Kconfig - Also added selftests in second patch to ensure headers are always working. Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> init/Kconfig | 10 +++++ kernel/.gitignore | 1 + kernel/Makefile | 10 +++++ kernel/gen_ikh_data.sh | 89 ++++++++++++++++++++++++++++++++++++++++++ kernel/kheaders.c | 74 +++++++++++++++++++++++++++++++++++ 5 files changed, 184 insertions(+) create mode 100755 kernel/gen_ikh_data.sh create mode 100644 kernel/kheaders.c diff --git a/init/Kconfig b/init/Kconfig index 4592bf7997c0..47c0db6e63a5 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -580,6 +580,16 @@ config IKCONFIG_PROC This option enables access to the kernel configuration file through /proc/config.gz. +config IKHEADERS_PROC + tristate "Enable kernel header artifacts through /proc/kheaders.tar.xz" + depends on PROC_FS + help + This option enables access to the kernel header and other artifacts that + are generated during the build process. These can be used to build eBPF + tracing programs, or similar programs. If you build the headers as a + module, a module called kheaders.ko is built which can be loaded on-demand + to get access to the headers. + config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" range 12 25 diff --git a/kernel/.gitignore b/kernel/.gitignore index 6e699100872f..34d1e77ee9df 100644 --- a/kernel/.gitignore +++ b/kernel/.gitignore @@ -1,5 +1,6 @@ # # Generated files # +kheaders.md5 timeconst.h hz.bc diff --git a/kernel/Makefile b/kernel/Makefile index 6c57e78817da..12399614c350 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_UTS_NS) += utsname.o obj-$(CONFIG_USER_NS) += user_namespace.o obj-$(CONFIG_PID_NS) += pid_namespace.o obj-$(CONFIG_IKCONFIG) += configs.o +obj-$(CONFIG_IKHEADERS_PROC) += kheaders.o obj-$(CONFIG_SMP) += stop_machine.o obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o obj-$(CONFIG_AUDIT) += audit.o auditfilter.o @@ -121,3 +122,12 @@ $(obj)/configs.o: $(obj)/config_data.gz targets += config_data.gz $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE $(call if_changed,gzip) + +$(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz + +quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz +cmd_genikh = $(srctree)/kernel/gen_ikh_data.sh $@ +$(obj)/kheaders_data.tar.xz: FORCE + $(call cmd,genikh) + +clean-files := kheaders_data.tar.xz kheaders.md5 diff --git a/kernel/gen_ikh_data.sh b/kernel/gen_ikh_data.sh new file mode 100755 index 000000000000..591a94f7b387 --- /dev/null +++ b/kernel/gen_ikh_data.sh @@ -0,0 +1,89 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# This script generates an archive consisting of kernel headers +# for CONFIG_IKHEADERS_PROC. +set -e +spath="$(dirname "$(readlink -f "$0")")" +kroot="$spath/.." +outdir="$(pwd)" +tarfile=$1 +cpio_dir=$outdir/$tarfile.tmp + +# Script filename relative to the kernel source root +# We add it to the archive because it is small and any changes +# to this script will also cause a rebuild of the archive. +sfile="$(realpath --relative-to $kroot "$(readlink -f "$0")")" + +src_file_list=" +include/ +arch/$SRCARCH/include/ +$sfile +" + +obj_file_list=" +include/ +arch/$SRCARCH/include/ +" + +# Support incremental builds by skipping archive generation +# if timestamps of files being archived are not changed. + +# This block is useful for debugging the incremental builds. +# Uncomment it for debugging. +# iter=1 +# if [ ! -f /tmp/iter ]; then echo 1 > /tmp/iter; +# else; iter=$(($(cat /tmp/iter) + 1)); fi +# find $src_file_list -type f | xargs ls -lR > /tmp/src-ls-$iter +# find $obj_file_list -type f | xargs ls -lR > /tmp/obj-ls-$iter + +# include/generated/compile.h is ignored because it is touched even when none +# of the source files changed. This causes pointless regeneration, so let us +# ignore them for md5 calculation. +pushd $kroot > /dev/null +src_files_md5="$(find $src_file_list -type f | + grep -v "include/generated/compile.h" | + xargs ls -lR | md5sum | cut -d ' ' -f1)" +popd > /dev/null +obj_files_md5="$(find $obj_file_list -type f | + grep -v "include/generated/compile.h" | + xargs ls -lR | md5sum | cut -d ' ' -f1)" + +if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi +if [ -f kernel/kheaders.md5 ] && + [ "$(cat kernel/kheaders.md5|head -1)" == "$src_files_md5" ] && + [ "$(cat kernel/kheaders.md5|head -2|tail -1)" == "$obj_files_md5" ] && + [ "$(cat kernel/kheaders.md5|tail -1)" == "$tarfile_md5" ]; then + exit +fi + +if [ "${quiet}" != "silent_" ]; then + echo " GEN $tarfile" +fi + +rm -rf $cpio_dir +mkdir $cpio_dir + +pushd $kroot > /dev/null +for f in $src_file_list; + do find "$f" ! -name "*.cmd" ! -name ".*"; +done | cpio --quiet -pd $cpio_dir +popd > /dev/null + +# The second CPIO can complain if files already exist which can +# happen with out of tree builds. Just silence CPIO for now. +for f in $obj_file_list; + do find "$f" ! -name "*.cmd" ! -name ".*"; +done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1 + +# Remove comments except SDPX lines +find $cpio_dir -type f -print0 | + xargs -0 -P8 -n1 perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;' + +tar -Jcf $tarfile -C $cpio_dir/ . > /dev/null + +echo "$src_files_md5" > kernel/kheaders.md5 +echo "$obj_files_md5" >> kernel/kheaders.md5 +echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5 + +rm -rf $cpio_dir diff --git a/kernel/kheaders.c b/kernel/kheaders.c new file mode 100644 index 000000000000..70ae6052920d --- /dev/null +++ b/kernel/kheaders.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Provide kernel headers useful to build tracing programs + * such as for running eBPF tracing tools. + * + * (Borrowed code from kernel/configs.c) + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/proc_fs.h> +#include <linux/init.h> +#include <linux/uaccess.h> + +/* + * Define kernel_headers_data and kernel_headers_data_end, within which the + * compressed kernel headers are stored. The file is first compressed with xz. + */ + +asm ( +" .pushsection .rodata, \"a\" \n" +" .global kernel_headers_data \n" +"kernel_headers_data: \n" +" .incbin \"kernel/kheaders_data.tar.xz\" \n" +" .global kernel_headers_data_end \n" +"kernel_headers_data_end: \n" +" .popsection \n" +); + +extern char kernel_headers_data; +extern char kernel_headers_data_end; + +static ssize_t +ikheaders_read_current(struct file *file, char __user *buf, + size_t len, loff_t *offset) +{ + return simple_read_from_buffer(buf, len, offset, + &kernel_headers_data, + &kernel_headers_data_end - + &kernel_headers_data); +} + +static const struct file_operations ikheaders_file_ops = { + .read = ikheaders_read_current, + .llseek = default_llseek, +}; + +static int __init ikheaders_init(void) +{ + struct proc_dir_entry *entry; + + /* create the current headers file */ + entry = proc_create("kheaders.tar.xz", S_IRUGO, NULL, + &ikheaders_file_ops); + if (!entry) + return -ENOMEM; + + proc_set_size(entry, + &kernel_headers_data_end - + &kernel_headers_data); + return 0; +} + +static void __exit ikheaders_cleanup(void) +{ + remove_proc_entry("kheaders.tar.xz", NULL); +} + +module_init(ikheaders_init); +module_exit(ikheaders_cleanup); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Joel Fernandes"); +MODULE_DESCRIPTION("Echo the kernel header artifacts used to build the kernel"); -- 2.21.0.593.g511ec345e18-goog

6 years, 7 months

6
11
0 0

next-20190503 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0-rc7 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: 76a893bbbf753c93fa6f68b9ee9b538ea4a9a7cb git describe: next-20190503 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190503 Regressions (compared to build next-20190502) ------------------------------------------------------------------------ x15 - arm: kselftest: * bpf_test_sock_addr.sh x86_64: kselftest-vsyscall-mode-none: * bpf_test_sock_addr.sh * net_fib-onlink-tests.sh Fixes (compared to build next-20190502) ------------------------------------------------------------------------ qemu_i386: kselftest: * bpf_test_maps * bpf_test_tcpbpf_user x15 - arm: kselftest: * bpf_test_maps In total: ------------------------------------------------------------------------ Ran 1588 total tests in the following environments and test suites. pass 929 fail 532 xfail 0 skip 127 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-513 * kselftest * boot-lkft-kselftests-vsyscall-mode-native-master-513 * boot-lkft-kselftests-vsyscall-mode-none-master-513 * kselftest-vsyscall-mode-native * kselftest-vsyscall-mode-none Failures ------------------------------------------------------------------------ qemu_arm64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests qemu_i386: * kselftest/bpf_test_progs juno-r2: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 x15: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cgroup_test_freezer * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh qemu_arm: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests hi6220-hikey: * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_progs * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh dragonboard-410c: * boot-lkft-kselftests-master-513/dragonboard-410c x86: * kselftest-vsyscall-mode-none/binderfs_binderfs_test * kselftest-vsyscall-mode-none/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-none/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-none/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-none/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-none/bpf_test_netcnt * kselftest-vsyscall-mode-none/bpf_test_progs * kselftest-vsyscall-mode-none/bpf_test_sock_addr.sh * kselftest-vsyscall-mode-none/bpf_test_sock_fields * kselftest-vsyscall-mode-none/bpf_test_sockmap * kselftest-vsyscall-mode-none/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-none/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-none/cgroup_test_core * kselftest-vsyscall-mode-none/dma-buf_udmabuf * kselftest-vsyscall-mode-none/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-none/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-none/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-none/kvm_dirty_log_test * kselftest-vsyscall-mode-none/kvm_evmcs_test * kselftest-vsyscall-mode-none/kvm_hyperv_cpuid * kselftest-vsyscall-mode-none/kvm_platform_info_test * kselftest-vsyscall-mode-none/kvm_set_sregs_test * kselftest-vsyscall-mode-none/kvm_smm_test * kselftest-vsyscall-mode-none/kvm_state_test * kselftest-vsyscall-mode-none/kvm_sync_regs_test * kselftest-vsyscall-mode-none/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-none/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-none/lib_bitmap.sh * kselftest-vsyscall-mode-none/lib_prime_numbers.sh * kselftest-vsyscall-mode-none/lib_strscpy.sh * kselftest-vsyscall-mode-none/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-none/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-none/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-none/membarrier_membarrier_test * kselftest-vsyscall-mode-none/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-none/net_fib_rule_tests.sh * kselftest-vsyscall-mode-none/net_ip_defrag.sh * kselftest-vsyscall-mode-none/net_msg_zerocopy.sh * kselftest-vsyscall-mode-none/net_pmtu.sh * kselftest-vsyscall-mode-none/net_psock_snd.sh * kselftest-vsyscall-mode-none/net_run_netsocktests * kselftest-vsyscall-mode-none/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-none/net_tls * kselftest-vsyscall-mode-none/net_xfrm_policy.sh * kselftest-vsyscall-mode-none/pidfd_pidfd_test * kselftest-vsyscall-mode-none/pstore_pstore_tests * kselftest-vsyscall-mode-none/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-none/rseq_basic_test * kselftest-vsyscall-mode-none/rseq_param_test * kselftest-vsyscall-mode-none/rseq_param_test_benchmark * kselftest-vsyscall-mode-none/rseq_param_test_compare_twice * kselftest-vsyscall-mode-none/rseq_run_param_test.sh * kselftest-vsyscall-mode-none/rtc_rtctest * kselftest-vsyscall-mode-none/seccomp_seccomp_bpf * kselftest-vsyscall-mode-none/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-none/tpm2_test_smoke.sh * kselftest-vsyscall-mode-none/tpm2_test_space.sh * kselftest-vsyscall-mode-none/vm_run_vmtests * kselftest-vsyscall-mode-none/x86_mpx-mini-test_64 * kselftest-vsyscall-mode-native/binderfs_binderfs_test * kselftest-vsyscall-mode-native/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-native/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-native/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-native/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-native/bpf_test_netcnt * kselftest-vsyscall-mode-native/bpf_test_progs * kselftest-vsyscall-mode-native/bpf_test_sock_fields * kselftest-vsyscall-mode-native/bpf_test_sockmap * kselftest-vsyscall-mode-native/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-native/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-native/cgroup_test_core * kselftest-vsyscall-mode-native/dma-buf_udmabuf * kselftest-vsyscall-mode-native/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-native/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-native/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-native/kvm_dirty_log_test * kselftest-vsyscall-mode-native/kvm_evmcs_test * kselftest-vsyscall-mode-native/kvm_hyperv_cpuid * kselftest-vsyscall-mode-native/kvm_platform_info_test * kselftest-vsyscall-mode-native/kvm_set_sregs_test * kselftest-vsyscall-mode-native/kvm_smm_test * kselftest-vsyscall-mode-native/kvm_state_test * kselftest-vsyscall-mode-native/kvm_sync_regs_test * kselftest-vsyscall-mode-native/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-native/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-native/lib_bitmap.sh * kselftest-vsyscall-mode-native/lib_prime_numbers.sh * kselftest-vsyscall-mode-native/lib_printf.sh * kselftest-vsyscall-mode-native/lib_strscpy.sh * kselftest-vsyscall-mode-native/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-native/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-native/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-native/membarrier_membarrier_test * kselftest-vsyscall-mode-native/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-native/net_fib_rule_tests.sh * kselftest-vsyscall-mode-native/net_ip_defrag.sh * kselftest-vsyscall-mode-native/net_msg_zerocopy.sh * kselftest-vsyscall-mode-native/net_pmtu.sh * kselftest-vsyscall-mode-native/net_psock_snd.sh * kselftest-vsyscall-mode-native/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-native/net_xfrm_policy.sh * kselftest-vsyscall-mode-native/pidfd_pidfd_test * kselftest-vsyscall-mode-native/pstore_pstore_tests * kselftest-vsyscall-mode-native/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-native/rseq_basic_test * kselftest-vsyscall-mode-native/rseq_param_test * kselftest-vsyscall-mode-native/rseq_param_test_benchmark * kselftest-vsyscall-mode-native/rseq_param_test_compare_twice * kselftest-vsyscall-mode-native/rseq_run_param_test.sh * kselftest-vsyscall-mode-native/rtc_rtctest * kselftest-vsyscall-mode-native/seccomp_seccomp_bpf * kselftest-vsyscall-mode-native/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-native/tpm2_test_smoke.sh * kselftest-vsyscall-mode-native/tpm2_test_space.sh * kselftest-vsyscall-mode-native/vm_run_vmtests * kselftest-vsyscall-mode-native/x86_fsgsbase_64 * kselftest-vsyscall-mode-native/x86_mpx-mini-test_64 * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_mpx-mini-test_64 Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

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[PATCH] rcutorture: Tweak kvm options

by Sebastian Andrzej Siewior

In one of my rcutorture tests the TSC clocksource got marked unstable due to a large difference in the TSC value. I'm not sure if the guest run for a long time with disabled interrupts or if the host was very busy and didn't schedule the guest for some time. I took a look on the qemu/KVM options and decided to update the options: - Use kvm{32|64} as CPU. We could probably use `host' (like ARM does) for maximum available features but since we don't run any userland I'm not sure if it makes any difference. - Drop the "noapic" option, enable TSC deadline timer. There is no history why the APIC was disabled, I see no reason for it. The deadline timer is probably "nicer". - Additional config options. It ensures that the kernel knowns that it runs as a kvm guest and can use virt devices like the kvm-clock as clocksource. The kvm-clock was the main motivation here. - I didn't add a random HW device. It would make the random device ready earlier (not it doesn't complete the initialisation at all) but I doubt that there is any need for this. Signed-off-by: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> --- tools/testing/selftests/rcutorture/bin/functions.sh | 13 ++++++++++++- .../selftests/rcutorture/configs/rcu/CFcommon | 4 ++++ 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/rcutorture/bin/functions.sh b/tools/testing/selftests/rcutorture/bin/functions.sh index 6bcb8b5b2ff22..be3c5c73d7e79 100644 --- a/tools/testing/selftests/rcutorture/bin/functions.sh +++ b/tools/testing/selftests/rcutorture/bin/functions.sh @@ -172,7 +172,7 @@ identify_qemu_append () { local console=ttyS0 case "$1" in qemu-system-x86_64|qemu-system-i386) - echo noapic selinux=0 initcall_debug debug + echo selinux=0 initcall_debug debug ;; qemu-system-aarch64) console=ttyAMA0 @@ -191,8 +191,19 @@ identify_qemu_append () { # Output arguments for qemu arguments based on the TORTURE_QEMU_MAC # and TORTURE_QEMU_INTERACTIVE environment variables. identify_qemu_args () { + local KVM_CPU="" + case "$1" in + qemu-system-x86_64) + KVM_CPU=kvm64 + ;; + qemu-system-i386) + KVM_CPU=kvm32 + ;; + esac case "$1" in qemu-system-x86_64|qemu-system-i386) + echo -machine q35,accel=kvm + echo -cpu ${KVM_CPU},x2apic=on,tsc-deadline=on,hypervisor=on,tsc_adjust=on ;; qemu-system-aarch64) echo -machine virt,gic-version=host -cpu host diff --git a/tools/testing/selftests/rcutorture/configs/rcu/CFcommon b/tools/testing/selftests/rcutorture/configs/rcu/CFcommon index d2d2a86139db1..322d5d40443cd 100644 --- a/tools/testing/selftests/rcutorture/configs/rcu/CFcommon +++ b/tools/testing/selftests/rcutorture/configs/rcu/CFcommon @@ -1,2 +1,6 @@ CONFIG_RCU_TORTURE_TEST=y CONFIG_PRINTK_TIME=y +CONFIG_HYPERVISOR_GUEST=y +CONFIG_PARAVIRT=y +CONFIG_PARAVIRT_SPINLOCKS=y +CONFIG_KVM_GUEST=y -- 2.20.1

6 years, 7 months

3
12
0 0

next-20190502 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0-rc7 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: e8b243ea3b19b6f3b9fffca232a2c7b000964d6b git describe: next-20190502 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190502 Regressions (compared to build next-20190501) ------------------------------------------------------------------------ qemu_arm: kselftest: * bpf_test_maps qemu_i386: kselftest: * bpf_test_tcpbpf_user qemu_x86_64: kselftest: * net_fib_rule_tests.sh x15 - arm: kselftest: * bpf_test_maps * cgroup_test_freezer * net_fib_rule_tests.sh x86_64: kselftest-vsyscall-mode-none: * net_fib_rule_tests.sh Fixes (compared to build next-20190501) ------------------------------------------------------------------------ qemu_x86_64: kselftest: * bpf_test_sock_addr.sh x86_64: kselftest-vsyscall-mode-none: * net_fib-onlink-tests.sh In total: ------------------------------------------------------------------------ Ran 555 total tests in the following environments and test suites. pass 337 fail 179 xfail 0 skip 39 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-512 * kselftest * boot-lkft-kselftests-vsyscall-mode-native-master-512 * boot-lkft-kselftests-vsyscall-mode-none-master-512 * kselftest-vsyscall-mode-none Failures ------------------------------------------------------------------------ dragonboard-410c: hi6220-hikey: juno-r2: qemu_i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs * kselftest/bpf_test_tcpbpf_user qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 x15: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cgroup_test_freezer * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests qemu_arm: * kselftest/bpf_test_maps * kselftest/bpf_test_progs * kselftest/bpf_test_verifier i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs x86: * kselftest-vsyscall-mode-none/binderfs_binderfs_test * kselftest-vsyscall-mode-none/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-none/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-none/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-none/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-none/bpf_test_netcnt * kselftest-vsyscall-mode-none/bpf_test_progs * kselftest-vsyscall-mode-none/bpf_test_sock_fields * kselftest-vsyscall-mode-none/bpf_test_sockmap * kselftest-vsyscall-mode-none/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-none/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-none/cgroup_test_core * kselftest-vsyscall-mode-none/dma-buf_udmabuf * kselftest-vsyscall-mode-none/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-none/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-none/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-none/kvm_dirty_log_test * kselftest-vsyscall-mode-none/kvm_evmcs_test * kselftest-vsyscall-mode-none/kvm_platform_info_test * kselftest-vsyscall-mode-none/kvm_set_sregs_test * kselftest-vsyscall-mode-none/kvm_smm_test * kselftest-vsyscall-mode-none/kvm_state_test * kselftest-vsyscall-mode-none/kvm_sync_regs_test * kselftest-vsyscall-mode-none/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-none/lib_bitmap.sh * kselftest-vsyscall-mode-none/lib_prime_numbers.sh * kselftest-vsyscall-mode-none/lib_printf.sh * kselftest-vsyscall-mode-none/lib_strscpy.sh * kselftest-vsyscall-mode-none/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-none/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-none/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-none/membarrier_membarrier_test * kselftest-vsyscall-mode-none/net_fib_rule_tests.sh * kselftest-vsyscall-mode-none/net_ip_defrag.sh * kselftest-vsyscall-mode-none/net_msg_zerocopy.sh * kselftest-vsyscall-mode-none/net_pmtu.sh * kselftest-vsyscall-mode-none/net_psock_snd.sh * kselftest-vsyscall-mode-none/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-none/net_xfrm_policy.sh * kselftest-vsyscall-mode-none/pidfd_pidfd_test * kselftest-vsyscall-mode-none/pstore_pstore_tests * kselftest-vsyscall-mode-none/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-none/rseq_basic_test * kselftest-vsyscall-mode-none/rseq_param_test * kselftest-vsyscall-mode-none/rseq_param_test_benchmark * kselftest-vsyscall-mode-none/rseq_param_test_compare_twice * kselftest-vsyscall-mode-none/rseq_run_param_test.sh * kselftest-vsyscall-mode-none/seccomp_seccomp_bpf * kselftest-vsyscall-mode-none/timestamping_txtimestamp.sh Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

1
0
0 0

[RFC][PATCH 2/2] ftrace/x86: Emulate call function while updating in breakpoint handler

by Steven Rostedt

From: Peter Zijlstra <peterz(a)infradead.org> Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3]. But after some debate[4][5] adding a gap in the stack when entering the breakpoint handler allows for pushing the return address onto the stack to easily emulate a call. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… [5] http://lkml.kernel.org/r/CAHk-=wjvQxY4DvPrJ6haPgAa6b906h=MwZXO6G8OtiTGe=N7_… Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Nicolai Stange <nstange(a)suse.de> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: the arch/x86 maintainers <x86(a)kernel.org> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Jiri Kosina <jikos(a)kernel.org> Cc: Miroslav Benes <mbenes(a)suse.cz> Cc: Petr Mladek <pmladek(a)suse.com> Cc: Joe Lawrence <joe.lawrence(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com> Cc: Tim Chen <tim.c.chen(a)linux.intel.com> Cc: Sebastian Andrzej Siewior <bigeasy(a)linutronix.de> Cc: Mimi Zohar <zohar(a)linux.ibm.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Nick Desaulniers <ndesaulniers(a)google.com> Cc: Nayna Jain <nayna(a)linux.ibm.com> Cc: Masahiro Yamada <yamada.masahiro(a)socionext.com> Cc: Joerg Roedel <jroedel(a)suse.de> Cc: "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest(a)vger.kernel.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Signed-off-by: *** Need SoB From Peter Zijlstra *** Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- arch/x86/kernel/ftrace.c | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index ef49517f6bb2..fd152f5a937b 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -29,6 +29,7 @@ #include <asm/kprobes.h> #include <asm/ftrace.h> #include <asm/nops.h> +#include <asm/text-patching.h> #ifdef CONFIG_DYNAMIC_FTRACE @@ -231,6 +232,7 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr, } static unsigned long ftrace_update_func; +static unsigned long ftrace_update_func_call; static int update_ftrace_func(unsigned long ip, void *new) { @@ -259,6 +261,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func) unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -294,13 +298,21 @@ int ftrace_int3_handler(struct pt_regs *regs) if (WARN_ON_ONCE(!regs)) return 0; - ip = regs->ip - 1; - if (!ftrace_location(ip) && !is_ftrace_caller(ip)) - return 0; + ip = regs->ip - INT3_INSN_SIZE; - regs->ip += MCOUNT_INSN_SIZE - 1; + if (ftrace_location(ip)) { + int3_emulate_call(regs, (unsigned long)ftrace_regs_caller); + return 1; + } else if (is_ftrace_caller(ip)) { + if (!ftrace_update_func_call) { + int3_emulate_jmp(regs, ip + CALL_INSN_SIZE); + return 1; + } + int3_emulate_call(regs, ftrace_update_func_call); + return 1; + } - return 1; + return 0; } NOKPROBE_SYMBOL(ftrace_int3_handler); @@ -859,6 +871,8 @@ void arch_ftrace_update_trampoline(struct ftrace_ops *ops) func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -960,6 +974,7 @@ static int ftrace_mod_jmp(unsigned long ip, void *func) { unsigned char *new; + ftrace_update_func_call = 0UL; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new); -- 2.20.1

6 years, 7 months

1
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Re: [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation

by Andy Lutomirski

On Mon, Apr 29, 2019 at 12:13 PM Linus Torvalds <torvalds(a)linux-foundation.org> wrote: > > > > On Mon, Apr 29, 2019, 12:02 Linus Torvalds <torvalds(a)linux-foundation.org> wrote: >> >> >> >> If nmi were to break it, it would be a cpu bug. > > > Side note: we *already* depend on sti shadow working in other parts of the kernel, namely sti->iret. > Where? STI; IRET would be nuts. Before: commit 4214a16b02971c60960afd675d03544e109e0d75 Author: Andy Lutomirski <luto(a)kernel.org> Date: Thu Apr 2 17:12:12 2015 -0700 x86/asm/entry/64/compat: Use SYSRETL to return from compat mode SYSENTER we did sti; sysxit, but, when we discussed this, I don't recall anyone speaking up in favor of the safely of the old code. Not to mention that the crash we'll get if we get an NMI and a rescheduling interrupt in this path will be very, very hard to debug.

6 years, 7 months

6
23
0 0

[RFC][PATCH v3] ftrace/x86_64: Emulate call function while updating in breakpoint handler

by Steven Rostedt

From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org> Nicolai Stange discovered[1] that if live kernel patching is enabled, and the function tracer started tracing the same function that was patched, the conversion of the fentry call site during the translation of going from calling the live kernel patch trampoline to the iterator trampoline, would have as slight window where it didn't call anything. As live kernel patching depends on ftrace to always call its code (to prevent the function being traced from being called, as it will redirect it). This small window would allow the old buggy function to be called, and this can cause undesirable results. Nicolai submitted new patches[2] but these were controversial. As this is similar to the static call emulation issues that came up a while ago[3], Linus suggested using per CPU data along with special trampolines[4] to emulate the calls. Linus's solution was for text poke (which was mostly what the static_call code did), but as ftrace has its own mechanism, it required doing its own thing. Having ftrace use its own per CPU data and having its own set of specialized trampolines solves the issue of missed calls that live kernel patching suffers. [1] http://lkml.kernel.org/r/20180726104029.7736-1-nstange@suse.de [2] http://lkml.kernel.org/r/20190427100639.15074-1-nstange@suse.de [3] http://lkml.kernel.org/r/3cf04e113d71c9f8e4be95fb84a510f085aa4afa.154171145… [4] http://lkml.kernel.org/r/CAHk-=wh5OpheSU8Em_Q3Hg8qw_JtoijxOdPtHru6d+5K8TWM=… Inspired-by: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: stable(a)vger.kernel.org Fixes: b700e7f03df5 ("livepatch: kernel: add support for live patching") Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> --- Changes since v2: - Moved inline asm to ftrace_64.S - Used PER_CPU_VAR() and TRACE_IRQS_ON macros in assembly - Renamed trampolines to be a little more coherent - Created assembly version of STACK_FRAME_NON_STANDARD() in asm/frame.h - Call ftrace_regs_caller instead of ftrace_caller - No longer support 32 bit (it crashed badly on tests, and I couldn't figure it out) arch/x86/include/asm/frame.h | 15 ++++++ arch/x86/kernel/ftrace.c | 102 ++++++++++++++++++++++++++++++++++- arch/x86/kernel/ftrace_64.S | 56 +++++++++++++++++++ 3 files changed, 172 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/frame.h b/arch/x86/include/asm/frame.h index 5cbce6fbb534..04892b374b93 100644 --- a/arch/x86/include/asm/frame.h +++ b/arch/x86/include/asm/frame.h @@ -42,4 +42,19 @@ #endif /* CONFIG_FRAME_POINTER */ +#ifdef __ASSEMBLY__ +#ifdef CONFIG_STACK_VALIDATION +#define STACK_FRAME_NON_STANDARD(func) \ +.section .discard.func_stack_frame_non_standard,"aw"; \ +.align 8; \ +.type __func_stack_frame_non_standard_##func, @object; \ +.size __func_stack_frame_non_standard_##func, 8; \ +__func_stack_frame_non_standard_##func: \ +.quad func; \ +.previous +#else /* !CONFIG_STACK_VALIDATION */ +#define STACK_FRAME_NON_STANDARD(func) +#endif /* CONFIG_STACK_VALIDATION */ +#endif /* __ASSEMBLY__ */ + #endif /* _ASM_X86_FRAME_H */ diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index ef49517f6bb2..634fc0d4fe97 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -232,6 +232,9 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr, static unsigned long ftrace_update_func; +/* Used within inline asm below */ +unsigned long ftrace_update_func_call; + static int update_ftrace_func(unsigned long ip, void *new) { unsigned char old[MCOUNT_INSN_SIZE]; @@ -259,6 +262,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func) unsigned char *new; int ret; + ftrace_update_func_call = (unsigned long)func; + new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -280,6 +285,46 @@ static nokprobe_inline int is_ftrace_caller(unsigned long ip) return 0; } +#ifdef CONFIG_X86_64 +/* + * We need to handle the "call func1" -> "call func2" case. + * Just skipping the call is not sufficient as it will be like + * changing to "nop" first and then updating the call. But some + * users of ftrace require calls never to be missed. + * + * To emulate the call while converting the call site with a breakpoint, + * some trampolines are used along with per CPU buffers. + * There are three trampolines for the call sites and three trampolines + * for the updating of the call in ftrace trampoline. The three + * trampolines are: + * + * 1) Interrupts are enabled when the breakpoint is hit + * 2) Interrupts are disabled when the breakpoint is hit + * 3) The breakpoint was hit in an NMI + * + * As per CPU data is used, interrupts must be disabled to prevent them + * from corrupting the data. A separate NMI trampoline is used for the + * NMI case. If interrupts are already disabled, then the return path + * of where the breakpoint was hit (saved in the per CPU data) is pushed + * on the stack and then a jump to either the ftrace_caller (which will + * loop through all registered ftrace_ops handlers depending on the ip + * address), or if its a ftrace trampoline call update, it will call + * ftrace_update_func_call which will hold the call that should be + * called. + */ +extern asmlinkage void ftrace_emulate_call_sti(void); +extern asmlinkage void ftrace_emulate_call(void); +extern asmlinkage void ftrace_emulate_call_nmi(void); +extern asmlinkage void ftrace_emulate_call_update_sti(void); +extern asmlinkage void ftrace_emulate_call_update(void); +extern asmlinkage void ftrace_emulate_call_update_nmi(void); + +DEFINE_PER_CPU(void *, ftrace_bp_call_return); +DEFINE_PER_CPU(void *, ftrace_bp_call_nmi_return); + +/* To hold the ftrace_regs_caller address to push on the stack */ +void *ftrace_caller_func = (void *)ftrace_regs_caller; + /* * A breakpoint was added to the code address we are about to * modify, and this is the handle that will just skip over it. @@ -291,6 +336,58 @@ int ftrace_int3_handler(struct pt_regs *regs) { unsigned long ip; + if (WARN_ON_ONCE(!regs)) + return 0; + + ip = regs->ip - 1; + if (ftrace_location(ip)) { + /* A breakpoint at the beginning of the function was hit */ + if (in_nmi()) { + /* NMIs have their own trampoline */ + this_cpu_write(ftrace_bp_call_nmi_return, (void *)ip + MCOUNT_INSN_SIZE); + regs->ip = (unsigned long) ftrace_emulate_call_nmi; + return 1; + } + this_cpu_write(ftrace_bp_call_return, (void *)ip + MCOUNT_INSN_SIZE); + if (regs->flags & X86_EFLAGS_IF) { + regs->flags &= ~X86_EFLAGS_IF; + regs->ip = (unsigned long) ftrace_emulate_call_sti; + /* Tell lockdep here we are enabling interrupts */ + lockdep_hardirqs_on(_THIS_IP_); + } else { + regs->ip = (unsigned long) ftrace_emulate_call; + } + return 1; + } else if (is_ftrace_caller(ip)) { + /* An ftrace trampoline is being updated */ + if (!ftrace_update_func_call) { + /* If it's a jump, just need to skip it */ + regs->ip += MCOUNT_INSN_SIZE -1; + return 1; + } + if (in_nmi()) { + /* NMIs have their own trampoline */ + this_cpu_write(ftrace_bp_call_nmi_return, (void *)ip + MCOUNT_INSN_SIZE); + regs->ip = (unsigned long) ftrace_emulate_call_update_nmi; + return 1; + } + this_cpu_write(ftrace_bp_call_return, (void *)ip + MCOUNT_INSN_SIZE); + if (regs->flags & X86_EFLAGS_IF) { + regs->flags &= ~X86_EFLAGS_IF; + regs->ip = (unsigned long) ftrace_emulate_call_update_sti; + } else { + regs->ip = (unsigned long) ftrace_emulate_call_update; + } + return 1; + } + + return 0; +} +#else /* !X86_64 */ +int ftrace_int3_handler(struct pt_regs *regs) +{ + unsigned long ip; + if (WARN_ON_ONCE(!regs)) return 0; @@ -299,9 +396,9 @@ int ftrace_int3_handler(struct pt_regs *regs) return 0; regs->ip += MCOUNT_INSN_SIZE - 1; - return 1; } +#endif NOKPROBE_SYMBOL(ftrace_int3_handler); static int ftrace_write(unsigned long ip, const char *val, int size) @@ -859,6 +956,8 @@ void arch_ftrace_update_trampoline(struct ftrace_ops *ops) func = ftrace_ops_get_func(ops); + ftrace_update_func_call = (unsigned long)func; + /* Do a safe modify in case the trampoline is executing */ new = ftrace_call_replace(ip, (unsigned long)func); ret = update_ftrace_func(ip, new); @@ -960,6 +1059,7 @@ static int ftrace_mod_jmp(unsigned long ip, void *func) { unsigned char *new; + ftrace_update_func_call = 0; new = ftrace_jmp_replace(ip, (unsigned long)func); return update_ftrace_func(ip, new); diff --git a/arch/x86/kernel/ftrace_64.S b/arch/x86/kernel/ftrace_64.S index 75f2b36b41a6..8642e1719370 100644 --- a/arch/x86/kernel/ftrace_64.S +++ b/arch/x86/kernel/ftrace_64.S @@ -9,6 +9,9 @@ #include <asm/export.h> #include <asm/nospec-branch.h> #include <asm/unwind_hints.h> +#include <asm/irqflags.h> +#include <asm/percpu.h> +#include <asm/frame.h> .code64 .section .entry.text, "ax" @@ -262,6 +265,59 @@ GLOBAL(ftrace_regs_caller_end) ENDPROC(ftrace_regs_caller) +/* Trampoline for function update with interrupts enabled */ +GLOBAL(ftrace_emulate_call_sti) + push PER_CPU_VAR(ftrace_bp_call_return) + push ftrace_caller_func + TRACE_IRQS_ON + sti + ret +ENDPROC(ftrace_emulate_call_sti) + +/* Trampoline for function update with interrupts disabled*/ +GLOBAL(ftrace_emulate_call) + push PER_CPU_VAR(ftrace_bp_call_return) + push ftrace_caller_func + ret +ENDPROC(ftrace_emulate_call) + +/* Trampoline for function update in an NMI */ +GLOBAL(ftrace_emulate_call_nmi) + push PER_CPU_VAR(ftrace_bp_call_nmi_return) + push ftrace_caller_func + ret +ENDPROC(ftrace_emulate_call_nmi) + +/* Trampoline for ftrace trampoline call update with interrupts enabled */ +GLOBAL(ftrace_emulate_call_update_sti) + push PER_CPU_VAR(ftrace_bp_call_return) + push ftrace_update_func_call + TRACE_IRQS_ON + sti + ret +ENDPROC(ftrace_emulate_call_update_sti) + +/* Trampoline for ftrace trampoline call update with interrupts disabled */ +GLOBAL(ftrace_emulate_call_update) + push PER_CPU_VAR(ftrace_bp_call_return) + push ftrace_update_func_call + ret +ENDPROC(ftrace_emulate_call_update) + +/* Trampoline for ftrace trampoline call update in an NMI */ +GLOBAL(ftrace_emulate_call_update_nmi) + push PER_CPU_VAR(ftrace_bp_call_nmi_return) + push ftrace_update_func_call + ret +ENDPROC(ftrace_emulate_call_update_nmi) + +STACK_FRAME_NON_STANDARD(ftrace_emulate_call_sti) +STACK_FRAME_NON_STANDARD(ftrace_emulate_call) +STACK_FRAME_NON_STANDARD(ftrace_emulate_call_nmi) +STACK_FRAME_NON_STANDARD(ftrace_emulate_call_update_sti) +STACK_FRAME_NON_STANDARD(ftrace_emulate_call_update) +STACK_FRAME_NON_STANDARD(ftrace_emulate_call_update_nmi) + #else /* ! CONFIG_DYNAMIC_FTRACE */ ENTRY(function_hook) -- 2.20.1

6 years, 7 months

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next-20190501 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0-rc7 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: bf2c8035bd8b364a912a2fe67083c1c2ea836d19 git describe: next-20190501 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190501 Regressions (compared to build next-20190430) ------------------------------------------------------------------------ juno-r2 - arm64: kselftest: * bpf_test_sock_addr.sh qemu_x86_64: kselftest: * bpf_test_sock_addr.sh * net_fib-onlink-tests.sh x86_64: kselftest: * bpf_test_sock_addr.sh kselftest-vsyscall-mode-native: * bpf_test_sock_addr.sh * net_fib-onlink-tests.sh x86_64: kselftest: * bpf_test_sock_addr.sh kselftest-vsyscall-mode-native: * bpf_test_sock_addr.sh * net_fib-onlink-tests.sh Fixes (compared to build next-20190430) ------------------------------------------------------------------------ qemu_arm: kselftest: * bpf_test_maps qemu_arm64: kselftest: * bpf_test_maps * bpf_test_sockmap qemu_x86_64: kselftest: * bpf_test_select_reuseport x15 - arm: kselftest: * bpf_test_sock_addr.sh In total: ------------------------------------------------------------------------ Ran 1538 total tests in the following environments and test suites. pass 901 fail 514 xfail 0 skip 123 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-511 * kselftest * boot-lkft-kselftests-vsyscall-mode-native-master-511 * boot-lkft-kselftests-vsyscall-mode-none-master-511 * kselftest-vsyscall-mode-native * kselftest-vsyscall-mode-none Failures ------------------------------------------------------------------------ qemu_arm: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh qemu_i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 x15: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh juno-r2: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_tls dragonboard-410c: * boot-lkft-kselftests-master-511/dragonboard-410c qemu_arm64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests i386: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh hi6220-hikey: * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh x86: * kselftest-vsyscall-mode-native/binderfs_binderfs_test * kselftest-vsyscall-mode-native/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-native/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-native/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-native/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-native/bpf_test_netcnt * kselftest-vsyscall-mode-native/bpf_test_progs * kselftest-vsyscall-mode-native/bpf_test_sock_addr.sh * kselftest-vsyscall-mode-native/bpf_test_sock_fields * kselftest-vsyscall-mode-native/bpf_test_sockmap * kselftest-vsyscall-mode-native/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-native/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-native/cgroup_test_core * kselftest-vsyscall-mode-native/dma-buf_udmabuf * kselftest-vsyscall-mode-native/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-native/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-native/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-native/kvm_dirty_log_test * kselftest-vsyscall-mode-native/kvm_evmcs_test * kselftest-vsyscall-mode-native/kvm_hyperv_cpuid * kselftest-vsyscall-mode-native/kvm_platform_info_test * kselftest-vsyscall-mode-native/kvm_set_sregs_test * kselftest-vsyscall-mode-native/kvm_smm_test * kselftest-vsyscall-mode-native/kvm_state_test * kselftest-vsyscall-mode-native/kvm_sync_regs_test * kselftest-vsyscall-mode-native/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-native/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-native/lib_bitmap.sh * kselftest-vsyscall-mode-native/lib_printf.sh * kselftest-vsyscall-mode-native/lib_strscpy.sh * kselftest-vsyscall-mode-native/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-native/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-native/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-native/membarrier_membarrier_test * kselftest-vsyscall-mode-native/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-native/net_ip_defrag.sh * kselftest-vsyscall-mode-native/net_msg_zerocopy.sh * kselftest-vsyscall-mode-native/net_pmtu.sh * kselftest-vsyscall-mode-native/net_psock_snd.sh * kselftest-vsyscall-mode-native/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-native/net_xfrm_policy.sh * kselftest-vsyscall-mode-native/pidfd_pidfd_test * kselftest-vsyscall-mode-native/pstore_pstore_tests * kselftest-vsyscall-mode-native/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-native/rseq_basic_test * kselftest-vsyscall-mode-native/rseq_param_test * kselftest-vsyscall-mode-native/rseq_param_test_benchmark * kselftest-vsyscall-mode-native/rseq_param_test_compare_twice * kselftest-vsyscall-mode-native/rseq_run_param_test.sh * kselftest-vsyscall-mode-native/seccomp_seccomp_bpf * kselftest-vsyscall-mode-native/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-native/tpm2_test_smoke.sh * kselftest-vsyscall-mode-native/tpm2_test_space.sh * kselftest-vsyscall-mode-none/binderfs_binderfs_test * kselftest-vsyscall-mode-none/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-none/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-none/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-none/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-none/bpf_test_netcnt * kselftest-vsyscall-mode-none/bpf_test_progs * kselftest-vsyscall-mode-none/bpf_test_sock_fields * kselftest-vsyscall-mode-none/bpf_test_sockmap * kselftest-vsyscall-mode-none/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-none/cgroup_test_core * kselftest-vsyscall-mode-none/dma-buf_udmabuf * kselftest-vsyscall-mode-none/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-none/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-none/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-none/kvm_dirty_log_test * kselftest-vsyscall-mode-none/kvm_evmcs_test * kselftest-vsyscall-mode-none/kvm_hyperv_cpuid * kselftest-vsyscall-mode-none/kvm_platform_info_test * kselftest-vsyscall-mode-none/kvm_set_sregs_test * kselftest-vsyscall-mode-none/kvm_state_test * kselftest-vsyscall-mode-none/kvm_sync_regs_test * kselftest-vsyscall-mode-none/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-none/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-none/lib_bitmap.sh * kselftest-vsyscall-mode-none/lib_prime_numbers.sh * kselftest-vsyscall-mode-none/lib_printf.sh * kselftest-vsyscall-mode-none/lib_strscpy.sh * kselftest-vsyscall-mode-none/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-none/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-none/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-none/membarrier_membarrier_test * kselftest-vsyscall-mode-none/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-none/net_ip_defrag.sh * kselftest-vsyscall-mode-none/net_msg_zerocopy.sh * kselftest-vsyscall-mode-none/net_pmtu.sh * kselftest-vsyscall-mode-none/net_psock_snd.sh * kselftest-vsyscall-mode-none/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-none/net_xfrm_policy.sh * kselftest-vsyscall-mode-none/pidfd_pidfd_test * kselftest-vsyscall-mode-none/pstore_pstore_tests * kselftest-vsyscall-mode-none/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-none/rseq_basic_test * kselftest-vsyscall-mode-none/rseq_param_test * kselftest-vsyscall-mode-none/rseq_param_test_benchmark * kselftest-vsyscall-mode-none/rseq_param_test_compare_twice * kselftest-vsyscall-mode-none/rseq_run_param_test.sh * kselftest-vsyscall-mode-none/rtc_rtctest * kselftest-vsyscall-mode-none/seccomp_seccomp_bpf * kselftest-vsyscall-mode-none/timestamping_txtimestamp.sh * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_mpx-mini-test_64 Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years, 7 months

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next-20190430 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.1.0-rc7 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: f43b05fd4c176d42c7b3f3b99643910486fc49c8 git describe: next-20190430 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190430 Regressions (compared to build next-20190429) ------------------------------------------------------------------------ qemu_arm64: kselftest: * bpf_test_maps * bpf_test_sockmap qemu_x86_64: kselftest: * bpf_test_select_reuseport x86_64: kselftest-vsyscall-mode-none: * bpf_test_sockmap Fixes (compared to build next-20190429) ------------------------------------------------------------------------ qemu_x86_64: kselftest: * net_fib-onlink-tests.sh x15 - arm: kselftest: * bpf_test_maps x86_64: kselftest-vsyscall-mode-native: * bpf_test_sock_addr.sh * net_fib-onlink-tests.sh In total: ------------------------------------------------------------------------ Ran 1144 total tests in the following environments and test suites. pass 682 fail 374 xfail 0 skip 88 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-510 * kselftest * boot-lkft-kselftests-vsyscall-mode-native-master-510 * boot-lkft-kselftests-vsyscall-mode-none-master-510 * kselftest-vsyscall-mode-native * kselftest-vsyscall-mode-none Failures ------------------------------------------------------------------------ qemu_arm64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/vm_run_vmtests * kselftest/x86_fsgsbase_64 qemu_i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs juno-r2: * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_fields * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/cpufreq_main.sh * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test x15: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_verifier * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/pidfd_pidfd_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rtc_rtctest * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh dragonboard-410c: * boot-lkft-kselftests-master-510/dragonboard-410c qemu_arm: * kselftest/bpf_test_maps * kselftest/bpf_test_progs * kselftest/bpf_test_verifier hi6220-hikey: x86: * kselftest-vsyscall-mode-native/binderfs_binderfs_test * kselftest-vsyscall-mode-native/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-native/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-native/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-native/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-native/bpf_test_netcnt * kselftest-vsyscall-mode-native/bpf_test_progs * kselftest-vsyscall-mode-native/bpf_test_sock_fields * kselftest-vsyscall-mode-native/bpf_test_sockmap * kselftest-vsyscall-mode-native/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-native/cgroup_test_core * kselftest-vsyscall-mode-native/dma-buf_udmabuf * kselftest-vsyscall-mode-native/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-native/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-native/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-native/kvm_dirty_log_test * kselftest-vsyscall-mode-native/kvm_evmcs_test * kselftest-vsyscall-mode-native/kvm_hyperv_cpuid * kselftest-vsyscall-mode-native/kvm_platform_info_test * kselftest-vsyscall-mode-native/kvm_set_sregs_test * kselftest-vsyscall-mode-native/kvm_smm_test * kselftest-vsyscall-mode-native/kvm_state_test * kselftest-vsyscall-mode-native/kvm_sync_regs_test * kselftest-vsyscall-mode-native/lib_bitmap.sh * kselftest-vsyscall-mode-native/lib_prime_numbers.sh * kselftest-vsyscall-mode-native/lib_printf.sh * kselftest-vsyscall-mode-native/lib_strscpy.sh * kselftest-vsyscall-mode-native/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-native/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-native/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-native/membarrier_membarrier_test * kselftest-vsyscall-mode-native/net_ip_defrag.sh * kselftest-vsyscall-mode-native/net_msg_zerocopy.sh * kselftest-vsyscall-mode-native/net_pmtu.sh * kselftest-vsyscall-mode-native/net_psock_snd.sh * kselftest-vsyscall-mode-native/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-native/net_xfrm_policy.sh * kselftest-vsyscall-mode-native/pidfd_pidfd_test * kselftest-vsyscall-mode-native/pstore_pstore_tests * kselftest-vsyscall-mode-native/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-native/rseq_basic_test * kselftest-vsyscall-mode-native/rseq_param_test * kselftest-vsyscall-mode-native/rseq_param_test_benchmark * kselftest-vsyscall-mode-native/rseq_param_test_compare_twice * kselftest-vsyscall-mode-native/rseq_run_param_test.sh * kselftest-vsyscall-mode-native/seccomp_seccomp_bpf * kselftest-vsyscall-mode-native/timestamping_txtimestamp.sh * kselftest-vsyscall-mode-native/tpm2_test_smoke.sh * kselftest-vsyscall-mode-native/tpm2_test_space.sh * kselftest-vsyscall-mode-none/binderfs_binderfs_test * kselftest-vsyscall-mode-none/bpf_test_flow_dissector.sh * kselftest-vsyscall-mode-none/bpf_test_lirc_mode2_user * kselftest-vsyscall-mode-none/bpf_test_lwt_ip_encap.sh * kselftest-vsyscall-mode-none/bpf_test_lwt_seg6local.sh * kselftest-vsyscall-mode-none/bpf_test_netcnt * kselftest-vsyscall-mode-none/bpf_test_progs * kselftest-vsyscall-mode-none/bpf_test_sock_fields * kselftest-vsyscall-mode-none/bpf_test_sockmap * kselftest-vsyscall-mode-none/bpf_test_tc_edt.sh * kselftest-vsyscall-mode-none/bpf_test_tc_tunnel.sh * kselftest-vsyscall-mode-none/cgroup_test_core * kselftest-vsyscall-mode-none/dma-buf_udmabuf * kselftest-vsyscall-mode-none/firmware_fw_run_tests.sh * kselftest-vsyscall-mode-none/kvm_clear_dirty_log_test * kselftest-vsyscall-mode-none/kvm_cr4_cpuid_sync_test * kselftest-vsyscall-mode-none/kvm_dirty_log_test * kselftest-vsyscall-mode-none/kvm_evmcs_test * kselftest-vsyscall-mode-none/kvm_hyperv_cpuid * kselftest-vsyscall-mode-none/kvm_platform_info_test * kselftest-vsyscall-mode-none/kvm_set_sregs_test * kselftest-vsyscall-mode-none/kvm_smm_test * kselftest-vsyscall-mode-none/kvm_state_test * kselftest-vsyscall-mode-none/kvm_sync_regs_test * kselftest-vsyscall-mode-none/kvm_vmx_close_while_nested_test * kselftest-vsyscall-mode-none/kvm_vmx_tsc_adjust_test * kselftest-vsyscall-mode-none/lib_bitmap.sh * kselftest-vsyscall-mode-none/lib_prime_numbers.sh * kselftest-vsyscall-mode-none/lib_printf.sh * kselftest-vsyscall-mode-none/lib_strscpy.sh * kselftest-vsyscall-mode-none/livepatch_test-callbacks.sh * kselftest-vsyscall-mode-none/livepatch_test-livepatch.sh * kselftest-vsyscall-mode-none/livepatch_test-shadow-vars.sh * kselftest-vsyscall-mode-none/membarrier_membarrier_test * kselftest-vsyscall-mode-none/net_fib-onlink-tests.sh * kselftest-vsyscall-mode-none/net_ip_defrag.sh * kselftest-vsyscall-mode-none/net_msg_zerocopy.sh * kselftest-vsyscall-mode-none/net_pmtu.sh * kselftest-vsyscall-mode-none/net_psock_snd.sh * kselftest-vsyscall-mode-none/net_test_vxlan_under_vrf.sh * kselftest-vsyscall-mode-none/net_xfrm_policy.sh * kselftest-vsyscall-mode-none/pidfd_pidfd_test * kselftest-vsyscall-mode-none/pstore_pstore_tests * kselftest-vsyscall-mode-none/rseq_basic_percpu_ops_test * kselftest-vsyscall-mode-none/rseq_basic_test * kselftest-vsyscall-mode-none/rseq_param_test * kselftest-vsyscall-mode-none/rseq_param_test_benchmark * kselftest-vsyscall-mode-none/rseq_param_test_compare_twice * kselftest-vsyscall-mode-none/rseq_run_param_test.sh * kselftest-vsyscall-mode-none/seccomp_seccomp_bpf * kselftest-vsyscall-mode-none/timestamping_txtimestamp.sh * kselftest/binderfs_binderfs_test * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_lirc_mode2_user * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tc_tunnel.sh * kselftest/cgroup_test_core * kselftest/dma-buf_udmabuf * kselftest/firmware_fw_run_tests.sh * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/livepatch_test-callbacks.sh * kselftest/livepatch_test-livepatch.sh * kselftest/livepatch_test-shadow-vars.sh * kselftest/membarrier_membarrier_test * kselftest/net_fib-onlink-tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_msg_zerocopy.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_tls * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_test * kselftest/pstore_pstore_tests * kselftest/rseq_basic_percpu_ops_test * kselftest/rseq_basic_test * kselftest/rseq_param_test * kselftest/rseq_param_test_benchmark * kselftest/rseq_param_test_compare_twice * kselftest/rseq_run_param_test.sh * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh i386: * kselftest/bpf_test_maps * kselftest/bpf_test_progs Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

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