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

lkft kselftest for next-20220811

by lkft＠linaro.org

## Build * kernel: 5.19.0 * git: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next * git branch: master * git commit: 40d43a7507e1547dd45cb02af2e40d897c591870 * git describe: next-20220811 * test details: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20220811 ## Test Regressions (compared to next-20220810) No test regressions found. ## Metric Regressions (compared to next-20220810) No metric regressions found. Tested-by: Linux Kernel Functional Testing <lkft(a)linaro.org> ## Test Fixes (compared to next-20220810) No test fixes found. ## Metric Fixes (compared to next-20220810) No metric fixes found. ## Test result summary total: 0, pass: 0, fail: 0, skip: 0, xfail: 0 ## Build Summary ## Test suites summary -- Linaro LKFT https://lkft.linaro.org

2 years, 11 months

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[PATCH] selftests:net:forwarding: Included install command

by Piyush Thange

If the execution is skipped due to "jq not installed" message then the installation methods on different OS's have been provided with this message. Signed-off-by: Piyush Thange <pthange19(a)gmail.com> --- tools/testing/selftests/net/forwarding/lib.sh | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 37ae49d47853..c4121856fe06 100755 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -152,6 +152,14 @@ require_command() if [[ ! -x "$(command -v "$cmd")" ]]; then echo "SKIP: $cmd not installed" + if [[ $cmd == "jq" ]]; then + echo " Install on Debian based systems" + echo " sudo apt -y install jq" + echo " Install on RHEL based systems" + echo " sudo yum -y install jq" + echo " Install on Fedora based systems" + echo " sudo dnf -y install jq" + fi exit $ksft_skip fi } -- 2.37.1

2 years, 11 months

3
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[PATCH v2 0/2] kvm/selftests: Two rseq_test fixes

by Gavin Shan

There are two issues in current rseq_test implementation and the series intends to fix them: - From glibc-2.35, rseq information is registered by TLS. It means rseq_test is unable to register its own rseq information. PATCH[01] fixes the issue by reusing "../rseq/rseq.c" to fetch TLS's rseq information if possible. - sched_getcpu() relies on glibc's implementation and it can simply returns the CPU ID cached in the rseq information. In this case, it's pointless to compare the return value from sched_getcpu() and that fetched from rseq information. PATCH[02] fixes the issue by replacing sched_getcpu() with getcpu(). v1: https://lore.kernel.org/lkml/8c1f33b4-a5a1-fcfa-4521-36253ffa22c8@redhat.co… Changelog ========= v2: * Add "-ldl" to LDLIBS as Florian suggested. * Reuse "../rseq/rseq.c" as Paolo/Mathieu/Sean suggested. * Add comments to sys_getcpu() as Sean suggested. Gavin Shan (2): KVM: selftests: Make rseq compatible with glibc-2.35 KVM: selftests: Use getcpu() instead of sched_getcpu() in rseq_test tools/testing/selftests/kvm/Makefile | 5 ++- tools/testing/selftests/kvm/rseq_test.c | 60 ++++++++++++------------- 2 files changed, 33 insertions(+), 32 deletions(-) -- 2.23.0

2 years, 11 months

3
6
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[PATCH 0/2] kvm/selftests: Two rseq_test fixes

by Gavin Shan

There are two issues in current rseq_test implementation and the series intends to fix them: - From glibc-2.35, rseq information is registered by TLS. It means rseq_test is unable to register its own rseq information. PATCH[01] fixes the issue by reuse TLS's rseq information if needed. - sched_getcpu() relies on glibc's implementation and it can simply returns the CPU ID cached in the rseq information. In this case, it's pointless to compare the return value from sched_getcpu() and that fetched from rseq information. PATCH[02] fixes the issue by replacing sched_getcpu() with getcpu(). Gavin Shan (2): KVM: selftests: Make rseq compatible with glibc-2.35 KVM: selftests: Use getcpu() instead of sched_getcpu() in rseq_test tools/testing/selftests/kvm/rseq_test.c | 62 ++++++++++++++++++------- 1 file changed, 44 insertions(+), 18 deletions(-) -- 2.23.0

2 years, 11 months

5
24
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[PATCH] kunit: tool: make --raw_output=kunit (aka --raw_output) preserve leading spaces

by Daniel Latypov

With $ kunit.py run --raw_output=all ... you get the raw output from the kernel, e.g. something like > TAP version 14 > 1..26 > # Subtest: time_test_cases > 1..1 > ok 1 - time64_to_tm_test_date_range > ok 1 - time_test_cases But --raw_output=kunit or equivalently --raw_output, you get > TAP version 14 > 1..26 > # Subtest: time_test_cases > 1..1 > ok 1 - time64_to_tm_test_date_range > ok 1 - time_test_cases It looks less readable in my opinion, and it also isn't "raw output." This is due to sharing code with kunit_parser.py, which wants to strip leading whitespace since it uses anchored regexes. We could update the kunit_parser.py code to tolerate leaading spaces, but this patch takes the easier way out and adds a bool flag. Signed-off-by: Daniel Latypov <dlatypov(a)google.com> --- tools/testing/kunit/kunit.py | 2 +- tools/testing/kunit/kunit_parser.py | 10 ++++++---- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index e132b0654029..161a3b1b0217 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -206,7 +206,7 @@ def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input if request.raw_output == 'all': pass elif request.raw_output == 'kunit': - output = kunit_parser.extract_tap_lines(output) + output = kunit_parser.extract_tap_lines(output, lstrip=False) for line in output: print(line.rstrip()) diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py index 12d3ec77f427..1ae873e3e341 100644 --- a/tools/testing/kunit/kunit_parser.py +++ b/tools/testing/kunit/kunit_parser.py @@ -218,7 +218,7 @@ TAP_START = re.compile(r'TAP version ([0-9]+)$') KTAP_END = re.compile('(List of all partitions:|' 'Kernel panic - not syncing: VFS:|reboot: System halted)') -def extract_tap_lines(kernel_output: Iterable[str]) -> LineStream: +def extract_tap_lines(kernel_output: Iterable[str], lstrip=True) -> LineStream: """Extracts KTAP lines from the kernel output.""" def isolate_ktap_output(kernel_output: Iterable[str]) \ -> Iterator[Tuple[int, str]]: @@ -244,9 +244,11 @@ def extract_tap_lines(kernel_output: Iterable[str]) -> LineStream: # stop extracting KTAP lines break elif started: - # remove prefix and any indention and yield - # line with line number - line = line[prefix_len:].lstrip() + # remove the prefix and optionally any leading + # whitespace. Our parsing logic relies on this. + line = line[prefix_len:] + if lstrip: + line = line.lstrip() yield line_num, line return LineStream(lines=isolate_ktap_output(kernel_output)) base-commit: aeb6e6ac18c73ec287b3b1e2c913520699358c13 -- 2.37.1.559.g78731f0fdb-goog

2 years, 11 months

2
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[PATCH] selftests: kvm: fix compilation

by Paolo Bonzini

Commit 49de12ba06ef ("selftests: drop KSFT_KHDR_INSTALL make target") dropped from tools/testing/selftests/lib.mk the code related to KSFT_KHDR_INSTALL, but in doing so it also dropped the definition of the ARCH variable. The ARCH variable is used in several subdirectories, but kvm/ is the only one of these that was using KSFT_KHDR_INSTALL. As a result, kvm selftests cannot be built anymore: In file included from include/x86_64/vmx.h:12, from x86_64/vmx_pmu_caps_test.c:18: include/x86_64/processor.h:15:10: fatal error: asm/msr-index.h: No such file or directory 15 | #include <asm/msr-index.h> | ^~~~~~~~~~~~~~~~~ In file included from ../../../../tools/include/asm/atomic.h:6, from ../../../../tools/include/linux/atomic.h:5, from rseq_test.c:15: ../../../../tools/include/asm/../../arch/x86/include/asm/atomic.h:11:10: fatal error: asm/cmpxchg.h: No such file or directory 11 | #include <asm/cmpxchg.h> | ^~~~~~~~~~~~~~~ Fix it by including the definition that was present in lib.mk. Fixes: 49de12ba06ef ("selftests: drop KSFT_KHDR_INSTALL make target") Cc: Guillaume Tucker <guillaume.tucker(a)collabora.com> Cc: Anders Roxell <anders.roxell(a)linaro.org> Cc: Shuah Khan <skhan(a)linuxfoundation.org> Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> --- tools/testing/selftests/kvm/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 89c9a8c52c5f..4c122f1b1737 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -4,6 +4,8 @@ include ../../../build/Build.include all: top_srcdir = ../../../.. +include $(top_srcdir)/scripts/subarch.include +ARCH ?= $(SUBARCH) # For cross-builds to work, UNAME_M has to map to ARCH and arch specific # directories and targets in this Makefile. "uname -m" doesn't map to -- 2.31.1

2 years, 11 months

1
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[PATCH 0/5] Add process_memwatch syscall

by Muhammad Usama Anjum

Hello, This patch series implements a new syscall, process_memwatch. Currently, only the support to watch soft-dirty PTE bit is added. This syscall is generic to watch the memory of the process. There is enough room to add more operations like this to watch memory in the future. Soft-dirty PTE bit of the memory pages can be viewed by using pagemap procfs file. The soft-dirty PTE bit for the memory in a process can be cleared by writing to the clear_refs file. This series adds features that weren't possible through the Proc FS interface. - There is no atomic get soft-dirty PTE bit status and clear operation possible. - The soft-dirty PTE bit of only a part of memory cannot be cleared. Historically, soft-dirty PTE bit tracking has been used in the CRIU project. The Proc FS interface is enough for that as I think the process is frozen. We have the use case where we need to track the soft-dirty PTE bit for running processes. We need this tracking and clear mechanism of a region of memory while the process is running to emulate the getWriteWatch() syscall of Windows. This syscall is used by games to keep track of dirty pages and keep processing only the dirty pages. This syscall can be used by the CRIU project and other applications which require soft-dirty PTE bit information. As in the current kernel there is no way to clear a part of memory (instead of clearing the Soft-Dirty bits for the entire processi) and get+clear operation cannot be performed atomically, there are other methods to mimic this information entirely in userspace with poor performance: - The mprotect syscall and SIGSEGV handler for bookkeeping - The userfaultfd syscall with the handler for bookkeeping long process_memwatch(int pidfd, unsigned long start, int len, unsigned int flags, void *vec, int vec_len); This syscall can be used by the CRIU project and other applications which require soft-dirty PTE bit information. The following operations are supported in this syscall: - Get the pages that are soft-dirty. - Clear the pages which are soft-dirty. - The optional flag to ignore the VM_SOFTDIRTY and only track per page soft-dirty PTE bit There are two decisions which have been taken about how to get the output from the syscall. - Return offsets of the pages from the start in the vec - Stop execution when vec is filled with dirty pages These two arguments doesn't follow the mincore() philosophy where the output array corresponds to the address range in one to one fashion, hence the output buffer length isn't passed and only a flag is set if the page is present. This makes mincore() easy to use with less control. We are passing the size of the output array and putting return data consecutively which is offset of dirty pages from the start. The user can convert these offsets back into the dirty page addresses easily. Suppose, the user want to get first 10 dirty pages from a total memory of 100 pages. He'll allocate output buffer of size 10 and process_memwatch() syscall will abort after finding the 10 pages. This behaviour is needed to support Windows' getWriteWatch(). The behaviour like mincore() can be achieved by passing output buffer of 100 size. This interface can be used for any desired behaviour. Regards, Muhammad Usama Anjum Muhammad Usama Anjum (5): fs/proc/task_mmu: make functions global to be used in other files mm: Implement process_memwatch syscall mm: wire up process_memwatch syscall for x86 selftests: vm: add process_memwatch syscall tests mm: add process_memwatch syscall documentation Documentation/admin-guide/mm/soft-dirty.rst | 48 +- arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + fs/proc/task_mmu.c | 84 +-- include/linux/mm_inline.h | 99 +++ include/linux/syscalls.h | 3 +- include/uapi/asm-generic/unistd.h | 5 +- include/uapi/linux/memwatch.h | 12 + kernel/sys_ni.c | 1 + mm/Makefile | 2 +- mm/memwatch.c | 285 ++++++++ tools/include/uapi/asm-generic/unistd.h | 5 +- .../arch/x86/entry/syscalls/syscall_64.tbl | 1 + tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 2 + tools/testing/selftests/vm/memwatch_test.c | 635 ++++++++++++++++++ 16 files changed, 1098 insertions(+), 87 deletions(-) create mode 100644 include/uapi/linux/memwatch.h create mode 100644 mm/memwatch.c create mode 100644 tools/testing/selftests/vm/memwatch_test.c -- 2.30.2

2 years, 11 months

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lkft kselftest for next-20220810

by lkft＠linaro.org

## Build * kernel: 5.19.0 * git: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next * git branch: master * git commit: bc6c6584ffb27b62e19ea89553b22b4cad1abaca * git describe: next-20220810 * test details: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20220810 ## Test Regressions (compared to next-20220809) No test regressions found. ## Metric Regressions (compared to next-20220809) No metric regressions found. Tested-by: Linux Kernel Functional Testing <lkft(a)linaro.org> ## Test Fixes (compared to next-20220809) No test fixes found. ## Metric Fixes (compared to next-20220809) No metric fixes found. ## Test result summary total: 0, pass: 0, fail: 0, skip: 0, xfail: 0 ## Build Summary ## Test suites summary -- Linaro LKFT https://lkft.linaro.org

2 years, 11 months

1
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[PATCH v9 00/10] bpf: Add kfuncs for PKCS#7 signature verification

by Roberto Sassu

One of the desirable features in security is the ability to restrict import of data to a given system based on data authenticity. If data import can be restricted, it would be possible to enforce a system-wide policy based on the signing keys the system owner trusts. This feature is widely used in the kernel. For example, if the restriction is enabled, kernel modules can be plugged in only if they are signed with a key whose public part is in the primary or secondary keyring. For eBPF, it can be useful as well. For example, it might be useful to authenticate data an eBPF program makes security decisions on. After a discussion in the eBPF mailing list, it was decided that the stated goal should be accomplished by introducing four new kfuncs: bpf_lookup_user_key() and bpf_lookup_system_key(), for retrieving a keyring with keys trusted for signature verification, respectively from its serial and from a pre-determined ID; bpf_key_put(), to release the reference obtained with the former two kfuncs, bpf_verify_pkcs7_signature(), for verifying PKCS#7 signatures. Other than the key serial, bpf_lookup_user_key() also accepts key lookup flags, that influence the behavior of the lookup. bpf_lookup_system_key() accepts pre-determined IDs defined in include/linux/verification.h. bpf_key_put() accepts the new bpf_key structure, introduced to tell whether the other structure member, a key pointer, is valid or not. The reason is that verify_pkcs7_signature() also accepts invalid pointers, set with the pre-determined ID, to select a system-defined keyring. key_put() must be called only for valid key pointers. Since the two key lookup functions allocate memory and one increments a key reference count, they must be used in conjunction with bpf_key_put(). The latter must be called only if the lookup functions returned a non-NULL pointer. The verifier denies the execution of eBPF programs that don't respect this rule. The two key lookup functions should be used in alternative, depending on the use case. While bpf_lookup_user_key() provides great flexibility, it seems suboptimal in terms of security guarantees, as even if the eBPF program is assumed to be trusted, the serial used to obtain the key pointer might come from untrusted user space not choosing one that the system administrator approves to enforce a mandatory policy. bpf_lookup_system_key() instead provides much stronger guarantees, especially if the pre-determined ID is not passed by user space but is hardcoded in the eBPF program, and that program is signed. In this case, bpf_verify_pkcs7_signature() will always perform signature verification with a key that the system administrator approves, i.e. the primary, secondary or platform keyring. Nevertheless, key permission checks need to be done accurately. Since bpf_lookup_user_key() cannot determine how a key will be used by other kfuncs, it has to defer the permission check to the actual kfunc using the key. It does it by calling lookup_user_key() with KEY_DEFER_PERM_CHECK as needed permission. Later, bpf_verify_pkcs7_signature(), if called, completes the permission check by calling key_validate(). It does not need to call key_task_permission() with permission KEY_NEED_SEARCH, as it is already done elsewhere by the key subsystem. Future kfuncs using the bpf_key structure need to implement the proper checks as well. Finally, the last kfunc, bpf_verify_pkcs7_signature(), accepts the data and signature to verify as eBPF dynamic pointers, to minimize the number of kfunc parameters, and the keyring with keys for signature verification as a bpf_key structure, returned by one of the two key lookup functions. All kfuncs except bpf_key_put() can be called only from sleepable programs, because of memory allocation and crypto operations. For example, the lsm.s/bpf attach point is suitable, fexit/array_map_update_elem is not. The correctness of implementation of the new kfuncs and of their usage is checked with the introduced tests. The patch set includes patches from other authors (dependencies) for sake of completeness. It is organized as follows. Patch 1 from Benjamin Tissoires introduces the new KF_SLEEPABLE kfunc flag. Patch 2 from KP Singh allows kfuncs to be used by LSM programs. Patch 3 allows dynamic pointers to be used as kfunc parameters. Patch 4 exports bpf_dynptr_get_size(), to obtain the real size of data carried by a dynamic pointer. Patch 5 makes available for new eBPF kfuncs some key-related definitions. Patch 6 introduces the bpf_lookup_*_key() and bpf_key_put() kfuncs. Patch 7 introduces the bpf_verify_pkcs7_signature() kfunc. Finally, patches 8-10 introduce the tests. Changelog v8: - Define the new bpf_key structure to carry the key pointer and whether that pointer is valid or not (suggested by Daniel) - Drop patch to mark a kfunc parameter with the __maybe_null suffix - Improve documentation of kfuncs - Introduce bpf_lookup_system_key() to obtain a key pointer suitable for verify_pkcs7_signature() (suggested by Daniel) - Use the new kfunc registration API - Drop patch to test the __maybe_null suffix - Add tests for bpf_lookup_system_key() v7: - Add support for using dynamic and NULL pointers in kfunc (suggested by Alexei) - Add new kfunc-related tests v6: - Switch back to key lookup helpers + signature verification (until v5), and defer permission check from bpf_lookup_user_key() to bpf_verify_pkcs7_signature() - Add additional key lookup test to illustrate the usage of the KEY_LOOKUP_CREATE flag and validate the flags (suggested by Daniel) - Make description of flags of bpf_lookup_user_key() more user-friendly (suggested by Daniel) - Fix validation of flags parameter in bpf_lookup_user_key() (reported by Daniel) - Rename bpf_verify_pkcs7_signature() keyring-related parameters to user_keyring and system_keyring to make their purpose more clear - Accept keyring-related parameters of bpf_verify_pkcs7_signature() as alternatives (suggested by KP) - Replace unsigned long type with u64 in helper declaration (suggested by Daniel) - Extend the bpf_verify_pkcs7_signature() test by calling the helper without data, by ensuring that the helper enforces the keyring-related parameters as alternatives, by ensuring that the helper rejects inaccessible and expired keyrings, and by checking all system keyrings - Move bpf_lookup_user_key() and bpf_key_put() usage tests to ref_tracking.c (suggested by John) - Call bpf_lookup_user_key() and bpf_key_put() only in sleepable programs v5: - Move KEY_LOOKUP_ to include/linux/key.h for validation of bpf_verify_pkcs7_signature() parameter - Remove bpf_lookup_user_key() and bpf_key_put() helpers, and the corresponding tests - Replace struct key parameter of bpf_verify_pkcs7_signature() with the keyring serial and lookup flags - Call lookup_user_key() and key_put() in bpf_verify_pkcs7_signature() code, to ensure that the retrieved key is used according to the permission requested at lookup time - Clarified keyring precedence in the description of bpf_verify_pkcs7_signature() (suggested by John) - Remove newline in the second argument of ASSERT_ - Fix helper prototype regular expression in bpf_doc.py v4: - Remove bpf_request_key_by_id(), don't return an invalid pointer that other helpers can use - Pass the keyring ID (without ULONG_MAX, suggested by Alexei) to bpf_verify_pkcs7_signature() - Introduce bpf_lookup_user_key() and bpf_key_put() helpers (suggested by Alexei) - Add lookup_key_norelease test, to ensure that the verifier blocks eBPF programs which don't decrement the key reference count - Parse raw PKCS#7 signature instead of module-style signature in the verify_pkcs7_signature test (suggested by Alexei) - Parse kernel module in user space and pass raw PKCS#7 signature to the eBPF program for signature verification v3: - Rename bpf_verify_signature() back to bpf_verify_pkcs7_signature() to avoid managing different parameters for each signature verification function in one helper (suggested by Daniel) - Use dynamic pointers and export bpf_dynptr_get_size() (suggested by Alexei) - Introduce bpf_request_key_by_id() to give more flexibility to the caller of bpf_verify_pkcs7_signature() to retrieve the appropriate keyring (suggested by Alexei) - Fix test by reordering the gcc command line, always compile sign-file - Improve helper support check mechanism in the test v2: - Rename bpf_verify_pkcs7_signature() to a more generic bpf_verify_signature() and pass the signature type (suggested by KP) - Move the helper and prototype declaration under #ifdef so that user space can probe for support for the helper (suggested by Daniel) - Describe better the keyring types (suggested by Daniel) - Include linux/bpf.h instead of vmlinux.h to avoid implicit or redeclaration - Make the test selfcontained (suggested by Alexei) v1: - Don't define new map flag but introduce simple wrapper of verify_pkcs7_signature() (suggested by Alexei and KP) Benjamin Tissoires (1): btf: Add a new kfunc flag which allows to mark a function to be sleepable KP Singh (1): bpf: Allow kfuncs to be used in LSM programs Roberto Sassu (8): btf: Handle dynamic pointer parameter in kfuncs bpf: Export bpf_dynptr_get_size() KEYS: Move KEY_LOOKUP_ to include/linux/key.h bpf: Add bpf_lookup_*_key() and bpf_key_put() kfuncs bpf: Add bpf_verify_pkcs7_signature() kfunc selftests/bpf: Add verifier tests for bpf_lookup_*_key() and bpf_key_put() selftests/bpf: Add additional tests for bpf_lookup_*_key() selftests/bpf: Add test for bpf_verify_pkcs7_signature() kfunc Documentation/bpf/kfuncs.rst | 6 + include/linux/bpf.h | 7 + include/linux/bpf_verifier.h | 3 + include/linux/btf.h | 1 + include/linux/key.h | 3 + kernel/bpf/btf.c | 27 ++ kernel/bpf/helpers.c | 2 +- kernel/bpf/verifier.c | 4 +- kernel/trace/bpf_trace.c | 207 +++++++++ security/keys/internal.h | 2 - tools/testing/selftests/bpf/Makefile | 14 +- tools/testing/selftests/bpf/config | 2 + .../selftests/bpf/prog_tests/lookup_key.c | 112 +++++ .../bpf/prog_tests/verify_pkcs7_sig.c | 399 ++++++++++++++++++ .../selftests/bpf/progs/test_lookup_key.c | 46 ++ .../bpf/progs/test_verify_pkcs7_sig.c | 100 +++++ tools/testing/selftests/bpf/test_verifier.c | 3 +- .../selftests/bpf/verifier/ref_tracking.c | 139 ++++++ .../testing/selftests/bpf/verify_sig_setup.sh | 104 +++++ 19 files changed, 1172 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/lookup_key.c create mode 100644 tools/testing/selftests/bpf/prog_tests/verify_pkcs7_sig.c create mode 100644 tools/testing/selftests/bpf/progs/test_lookup_key.c create mode 100644 tools/testing/selftests/bpf/progs/test_verify_pkcs7_sig.c create mode 100755 tools/testing/selftests/bpf/verify_sig_setup.sh -- 2.25.1

2 years, 11 months

7
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[PATCH bpf-next v5 0/6] bpf trampoline for arm64

by Xu Kuohai

Add bpf trampoline support for arm64. Most of the logic is the same as x86. Tested on raspberry pi 4b and qemu with KASLR disabled (avoid long jump), result: #9 /1 bpf_cookie/kprobe:OK #9 /2 bpf_cookie/multi_kprobe_link_api:FAIL #9 /3 bpf_cookie/multi_kprobe_attach_api:FAIL #9 /4 bpf_cookie/uprobe:OK #9 /5 bpf_cookie/tracepoint:OK #9 /6 bpf_cookie/perf_event:OK #9 /7 bpf_cookie/trampoline:OK #9 /8 bpf_cookie/lsm:OK #9 bpf_cookie:FAIL #18 /1 bpf_tcp_ca/dctcp:OK #18 /2 bpf_tcp_ca/cubic:OK #18 /3 bpf_tcp_ca/invalid_license:OK #18 /4 bpf_tcp_ca/dctcp_fallback:OK #18 /5 bpf_tcp_ca/rel_setsockopt:OK #18 bpf_tcp_ca:OK #51 /1 dummy_st_ops/dummy_st_ops_attach:OK #51 /2 dummy_st_ops/dummy_init_ret_value:OK #51 /3 dummy_st_ops/dummy_init_ptr_arg:OK #51 /4 dummy_st_ops/dummy_multiple_args:OK #51 dummy_st_ops:OK #55 fentry_fexit:OK #56 fentry_test:OK #57 /1 fexit_bpf2bpf/target_no_callees:OK #57 /2 fexit_bpf2bpf/target_yes_callees:OK #57 /3 fexit_bpf2bpf/func_replace:OK #57 /4 fexit_bpf2bpf/func_replace_verify:OK #57 /5 fexit_bpf2bpf/func_sockmap_update:OK #57 /6 fexit_bpf2bpf/func_replace_return_code:OK #57 /7 fexit_bpf2bpf/func_map_prog_compatibility:OK #57 /8 fexit_bpf2bpf/func_replace_multi:OK #57 /9 fexit_bpf2bpf/fmod_ret_freplace:OK #57 fexit_bpf2bpf:OK #58 fexit_sleep:OK #59 fexit_stress:OK #60 fexit_test:OK #67 get_func_args_test:OK #68 get_func_ip_test:OK #104 modify_return:OK #237 xdp_bpf2bpf:OK bpf_cookie/multi_kprobe_link_api and bpf_cookie/multi_kprobe_attach_api failed due to lack of multi_kprobe on arm64. v5: - As Alexei suggested, remove is_valid_bpf_tramp_flags() v4: https://lore.kernel.org/bpf/20220517071838.3366093-1-xukuohai@huawei.com/ - Run the test cases on raspberry pi 4b - Rebase and add cookie to trampoline - As Steve suggested, move trace_direct_tramp() back to entry-ftrace.S to avoid messing up generic code with architecture specific code - As Jakub suggested, merge patch 4 and patch 5 of v3 to provide full function in one patch - As Mark suggested, add a comment for the use of aarch64_insn_patch_text_nosync() - Do not generate trampoline for long jump to avoid triggering ftrace_bug - Round stack size to multiples of 16B to avoid SPAlignmentFault - Use callee saved register x20 to reduce the use of mov_i64 - Add missing BTI J instructions - Trivial spelling and code style fixes v3: https://lore.kernel.org/bpf/20220424154028.1698685-1-xukuohai@huawei.com/ - Append test results for bpf_tcp_ca, dummy_st_ops, fexit_bpf2bpf, xdp_bpf2bpf - Support to poke bpf progs - Fix return value of arch_prepare_bpf_trampoline() to the total number of bytes instead of number of instructions - Do not check whether CONFIG_DYNAMIC_FTRACE_WITH_REGS is enabled in arch_prepare_bpf_trampoline, since the trampoline may be hooked to a bpf prog - Restrict bpf_arch_text_poke() to poke bpf text only, as kernel functions are poked by ftrace - Rewrite trace_direct_tramp() in inline assembly in trace_selftest.c to avoid messing entry-ftrace.S - isolate arch_ftrace_set_direct_caller() with macro CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS to avoid compile error when this macro is disabled - Some trivial code sytle fixes v2: https://lore.kernel.org/bpf/20220414162220.1985095-1-xukuohai@huawei.com/ - Add Song's ACK - Change the multi-line comment in is_valid_bpf_tramp_flags() into net style (patch 3) - Fix a deadloop issue in ftrace selftest (patch 2) - Replace pt_regs->x0 with pt_regs->orig_x0 in patch 1 commit message - Replace "bpf trampoline" with "custom trampoline" in patch 1, as ftrace direct call is not only used by bpf trampoline. v1: https://lore.kernel.org/bpf/20220413054959.1053668-1-xukuohai@huawei.com/ Xu Kuohai (6): arm64: ftrace: Add ftrace direct call support ftrace: Fix deadloop caused by direct call in ftrace selftest bpf: Remove is_valid_bpf_tramp_flags() bpf, arm64: Impelment bpf_arch_text_poke() for arm64 bpf, arm64: bpf trampoline for arm64 selftests/bpf: Fix trivial typo in fentry_fexit.c arch/arm64/Kconfig | 2 + arch/arm64/include/asm/ftrace.h | 22 + arch/arm64/kernel/asm-offsets.c | 1 + arch/arm64/kernel/entry-ftrace.S | 28 +- arch/arm64/net/bpf_jit.h | 1 + arch/arm64/net/bpf_jit_comp.c | 523 +++++++++++++++++- arch/x86/net/bpf_jit_comp.c | 20 - kernel/bpf/bpf_struct_ops.c | 3 + kernel/bpf/trampoline.c | 3 + kernel/trace/trace_selftest.c | 2 + .../selftests/bpf/prog_tests/fentry_fexit.c | 4 +- 11 files changed, 570 insertions(+), 39 deletions(-) -- 2.30.2

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