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[PATCH AUTOSEL 5.6 119/606] selftests: fix kvm relocatable native/cross builds and installs

by Sasha Levin

From: Shuah Khan <skhan(a)linuxfoundation.org> [ Upstream commit 66d69e081b526b6a6031f0d3ca8ddff71e5707a5 ] kvm test Makefile doesn't fully support cross-builds and installs. UNAME_M = $(shell uname -m) variable is used to define the target programs and libraries to be built from arch specific sources in sub-directories. For cross-builds to work, UNAME_M has to map to ARCH and arch specific directories and targets in this Makefile. UNAME_M variable to used to run the compiles pointing to the right arch directories and build the right targets for these supported architectures. TEST_GEN_PROGS and LIBKVM are set using UNAME_M variable. LINUX_TOOL_ARCH_INCLUDE is set using ARCH variable. x86_64 targets are named to include x86_64 as a suffix and directories for includes are in x86_64 sub-directory. s390x and aarch64 follow the same convention. "uname -m" doesn't result in the correct mapping for s390x and aarch64. Fix it to set UNAME_M correctly for s390x and aarch64 cross-builds. In addition, Makefile doesn't create arch sub-directories in the case of relocatable builds and test programs under s390x and x86_64 directories fail to build. This is a problem for native and cross-builds. Fix it to create all necessary directories keying off of TEST_GEN_PROGS. The following use-cases work with this change: Native x86_64: make O=/tmp/kselftest -C tools/testing/selftests TARGETS=kvm install \ INSTALL_PATH=$HOME/x86_64 arm64 cross-build: make O=$HOME/arm64_build/ ARCH=arm64 HOSTCC=gcc \ CROSS_COMPILE=aarch64-linux-gnu- defconfig make O=$HOME/arm64_build/ ARCH=arm64 HOSTCC=gcc \ CROSS_COMPILE=aarch64-linux-gnu- all make kselftest-install TARGETS=kvm O=$HOME/arm64_build ARCH=arm64 \ HOSTCC=gcc CROSS_COMPILE=aarch64-linux-gnu- s390x cross-build: make O=$HOME/s390x_build/ ARCH=s390 HOSTCC=gcc \ CROSS_COMPILE=s390x-linux-gnu- defconfig make O=$HOME/s390x_build/ ARCH=s390 HOSTCC=gcc \ CROSS_COMPILE=s390x-linux-gnu- all make kselftest-install TARGETS=kvm O=$HOME/s390x_build/ ARCH=s390 \ HOSTCC=gcc CROSS_COMPILE=s390x-linux-gnu- all No regressions in the following use-cases: make -C tools/testing/selftests TARGETS=kvm make kselftest-all TARGETS=kvm Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/kvm/Makefile | 29 +++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index d91c53b726e6..75dec268787f 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -5,8 +5,34 @@ all: top_srcdir = ../../../.. KSFT_KHDR_INSTALL := 1 + +# 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 +# arch specific sub-directory names. +# +# UNAME_M variable to used to run the compiles pointing to the right arch +# directories and build the right targets for these supported architectures. +# +# TEST_GEN_PROGS and LIBKVM are set using UNAME_M variable. +# LINUX_TOOL_ARCH_INCLUDE is set using ARCH variable. +# +# x86_64 targets are named to include x86_64 as a suffix and directories +# for includes are in x86_64 sub-directory. s390x and aarch64 follow the +# same convention. "uname -m" doesn't result in the correct mapping for +# s390x and aarch64. +# +# No change necessary for x86_64 UNAME_M := $(shell uname -m) +# Set UNAME_M for arm64 compile/install to work +ifeq ($(ARCH),arm64) + UNAME_M := aarch64 +endif +# Set UNAME_M s390x compile/install to work +ifeq ($(ARCH),s390) + UNAME_M := s390x +endif + LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/sparsebit.c LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c @@ -47,7 +73,7 @@ LIBKVM += $(LIBKVM_$(UNAME_M)) INSTALL_HDR_PATH = $(top_srcdir)/usr LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/ LINUX_TOOL_INCLUDE = $(top_srcdir)/tools/include -LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/x86/include +LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \ -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \ -I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \ @@ -78,6 +104,7 @@ $(LIBKVM_OBJ): $(OUTPUT)/%.o: %.c $(OUTPUT)/libkvm.a: $(LIBKVM_OBJ) $(AR) crs $@ $^ +x := $(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS)))) all: $(STATIC_LIBS) $(TEST_GEN_PROGS): $(STATIC_LIBS) -- 2.25.1

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[PATCH AUTOSEL 5.6 118/606] ftrace/selftest: make unresolved cases cause failure if --fail-unresolved set

by Sasha Levin

From: Alan Maguire <alan.maguire(a)oracle.com> [ Upstream commit b730d668138cb3dd9ce78f8003986d1adae5523a ] Currently, ftracetest will return 1 (failure) if any unresolved cases are encountered. The unresolved status results from modules and programs not being available, and as such does not indicate any issues with ftrace itself. As such, change the behaviour of ftracetest in line with unsupported cases; if unsupported cases happen, ftracetest still returns 0 unless --fail-unsupported. Here --fail-unresolved is added and the default is to return 0 if unresolved results occur. Signed-off-by: Alan Maguire <alan.maguire(a)oracle.com> Acked-by: Masami Hiramatsu <mhiramat(a)kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/ftrace/ftracetest | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest index 144308a757b7..19e9236dec5e 100755 --- a/tools/testing/selftests/ftrace/ftracetest +++ b/tools/testing/selftests/ftrace/ftracetest @@ -17,6 +17,7 @@ echo " -v|--verbose Increase verbosity of test messages" echo " -vv Alias of -v -v (Show all results in stdout)" echo " -vvv Alias of -v -v -v (Show all commands immediately)" echo " --fail-unsupported Treat UNSUPPORTED as a failure" +echo " --fail-unresolved Treat UNRESOLVED as a failure" echo " -d|--debug Debug mode (trace all shell commands)" echo " -l|--logdir <dir> Save logs on the <dir>" echo " If <dir> is -, all logs output in console only" @@ -112,6 +113,10 @@ parse_opts() { # opts UNSUPPORTED_RESULT=1 shift 1 ;; + --fail-unresolved) + UNRESOLVED_RESULT=1 + shift 1 + ;; --logdir|-l) LOG_DIR=$2 shift 2 @@ -176,6 +181,7 @@ KEEP_LOG=0 DEBUG=0 VERBOSE=0 UNSUPPORTED_RESULT=0 +UNRESOLVED_RESULT=0 STOP_FAILURE=0 # Parse command-line options parse_opts $* @@ -280,7 +286,7 @@ eval_result() { # sigval $UNRESOLVED) prlog " [${color_blue}UNRESOLVED${color_reset}]" UNRESOLVED_CASES="$UNRESOLVED_CASES $CASENO" - return 1 # this is a kind of bug.. something happened. + return $UNRESOLVED_RESULT # depends on use case ;; $UNTESTED) prlog " [${color_blue}UNTESTED${color_reset}]" -- 2.25.1

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[PATCH AUTOSEL 5.7 135/274] selftests/bpf: Add runqslower binary to .gitignore

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit e4e8f4d047fdcf7ac7d944e266e85d8041f16cd6 ] With recent changes, runqslower is being copied into selftests/bpf root directory. So add it into .gitignore. Fixes: b26d1e2b6028 ("selftests/bpf: Copy runqslower to OUTPUT directory") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Cc: Veronika Kabatova <vkabatov(a)redhat.com> Link: https://lore.kernel.org/bpf/20200429012111.277390-12-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/.gitignore | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore index c30079c86998..35a577ca0226 100644 --- a/tools/testing/selftests/bpf/.gitignore +++ b/tools/testing/selftests/bpf/.gitignore @@ -39,4 +39,4 @@ test_cpp /no_alu32 /bpf_gcc /tools - +/runqslower -- 2.25.1

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[PATCH AUTOSEL 5.7 134/274] selftests/bpf: Fix bpf_link leak in ns_current_pid_tgid selftest

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit 8d30e80a049ad699264e4a12911e349f93c7279a ] If condition is inverted, but it's also just not necessary. Fixes: 1c1052e0140a ("tools/testing/selftests/bpf: Add self-tests for new helper bpf_get_ns_current_pid_tgid.") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Cc: Carlos Neira <cneirabustos(a)gmail.com> Link: https://lore.kernel.org/bpf/20200429012111.277390-11-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c b/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c index 542240e16564..e74dc501b27f 100644 --- a/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c +++ b/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c @@ -80,9 +80,6 @@ void test_ns_current_pid_tgid(void) "User pid/tgid %llu BPF pid/tgid %llu\n", id, bss.pid_tgid)) goto cleanup; cleanup: - if (!link) { - bpf_link__destroy(link); - link = NULL; - } + bpf_link__destroy(link); bpf_object__close(obj); } -- 2.25.1

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[PATCH AUTOSEL 5.7 132/274] selftests/bpf: Fix invalid memory reads in core_relo selftest

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit 13c908495e5d51718a6da84ae925fa2aac056380 ] Another one found by AddressSanitizer. input_len is bigger than actually initialized data size. Fixes: c7566a69695c ("selftests/bpf: Add field existence CO-RE relocs tests") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Link: https://lore.kernel.org/bpf/20200429012111.277390-8-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/prog_tests/core_reloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c index 31e177adbdf1..084ed26a7d78 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -392,7 +392,7 @@ static struct core_reloc_test_case test_cases[] = { .input = STRUCT_TO_CHAR_PTR(core_reloc_existence___minimal) { .a = 42, }, - .input_len = sizeof(struct core_reloc_existence), + .input_len = sizeof(struct core_reloc_existence___minimal), .output = STRUCT_TO_CHAR_PTR(core_reloc_existence_output) { .a_exists = 1, .b_exists = 0, -- 2.25.1

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[PATCH AUTOSEL 5.7 131/274] selftests/bpf: Fix memory leak in extract_build_id()

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit 9f56bb531a809ecaa7f0ddca61d2cf3adc1cb81a ] getline() allocates string, which has to be freed. Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Cc: Song Liu <songliubraving(a)fb.com> Link: https://lore.kernel.org/bpf/20200429012111.277390-7-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/test_progs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 86d0020c9eec..93970ec1c9e9 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -351,6 +351,7 @@ int extract_build_id(char *build_id, size_t size) len = size; memcpy(build_id, line, len); build_id[len] = '\0'; + free(line); return 0; err: fclose(fp); -- 2.25.1

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[PATCH AUTOSEL 5.7 130/274] selftests/bpf: Fix memory leak in test selector

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit f25d5416d64c796aa639136eb0b076c8bd579b54 ] Free test selector substrings, which were strdup()'ed. Fixes: b65053cd94f4 ("selftests/bpf: Add whitelist/blacklist of test names to test_progs") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Link: https://lore.kernel.org/bpf/20200429012111.277390-6-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/test_progs.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index b521e0a512b6..86d0020c9eec 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -420,6 +420,18 @@ static int libbpf_print_fn(enum libbpf_print_level level, return 0; } +static void free_str_set(const struct str_set *set) +{ + int i; + + if (!set) + return; + + for (i = 0; i < set->cnt; i++) + free((void *)set->strs[i]); + free(set->strs); +} + static int parse_str_list(const char *s, struct str_set *set) { char *input, *state = NULL, *next, **tmp, **strs = NULL; @@ -756,11 +768,11 @@ int main(int argc, char **argv) fprintf(stdout, "Summary: %d/%d PASSED, %d SKIPPED, %d FAILED\n", env.succ_cnt, env.sub_succ_cnt, env.skip_cnt, env.fail_cnt); - free(env.test_selector.blacklist.strs); - free(env.test_selector.whitelist.strs); + free_str_set(&env.test_selector.blacklist); + free_str_set(&env.test_selector.whitelist); free(env.test_selector.num_set); - free(env.subtest_selector.blacklist.strs); - free(env.subtest_selector.whitelist.strs); + free_str_set(&env.subtest_selector.blacklist); + free_str_set(&env.subtest_selector.whitelist); free(env.subtest_selector.num_set); return env.fail_cnt ? EXIT_FAILURE : EXIT_SUCCESS; -- 2.25.1

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[PATCH AUTOSEL 5.7 129/274] selftests/bpf: Ensure test flavors use correct skeletons

by Sasha Levin

From: Andrii Nakryiko <andriin(a)fb.com> [ Upstream commit 76148faa161e7cfb2d7719f35b37d7db4f3f8596 ] Ensure that test runner flavors include their own skeletons from <flavor>/ directory. Previously, skeletons generated for no-flavor test_progs were used. Apart from fixing correctness, this also makes it possible to compile only flavors individually: $ make clean && make test_progs-no_alu32 ... now succeeds ... Fixes: 74b5a5968fe8 ("selftests/bpf: Replace test_progs and test_maps w/ general rule") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Link: https://lore.kernel.org/bpf/20200429012111.277390-2-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 4e654d41c7af..01c95f8278c7 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -324,7 +324,7 @@ $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o: \ $(TRUNNER_BPF_SKELS) \ $$(BPFOBJ) | $(TRUNNER_OUTPUT) $$(call msg,TEST-OBJ,$(TRUNNER_BINARY),$$@) - cd $$(@D) && $$(CC) $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F) + cd $$(@D) && $$(CC) -I. $$(CFLAGS) -c $(CURDIR)/$$< $$(LDLIBS) -o $$(@F) $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o: \ %.c \ -- 2.25.1

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[PATCH AUTOSEL 5.6 076/606] selftests/bpf: Enforce returning 0 for fentry/fexit programs

by Sasha Levin

From: Yonghong Song <yhs(a)fb.com> commit 6d74f64b922b8394dccc52576659cb0dc0a1da7b upstream. There are a few fentry/fexit programs returning non-0. The tests with these programs will break with the previous patch which enfoced return-0 rules. Fix them properly. Fixes: ac065870d928 ("selftests/bpf: Add BPF_PROG, BPF_KPROBE, and BPF_KRETPROBE macros") Signed-off-by: Yonghong Song <yhs(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Acked-by: Andrii Nakryiko <andriin(a)fb.com> Link: https://lore.kernel.org/bpf/20200514053207.1298479-1-yhs@fb.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- tools/testing/selftests/bpf/progs/test_overhead.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/test_overhead.c b/tools/testing/selftests/bpf/progs/test_overhead.c index bfe9fbcb9684..e15c7589695e 100644 --- a/tools/testing/selftests/bpf/progs/test_overhead.c +++ b/tools/testing/selftests/bpf/progs/test_overhead.c @@ -33,13 +33,13 @@ int prog3(struct bpf_raw_tracepoint_args *ctx) SEC("fentry/__set_task_comm") int BPF_PROG(prog4, struct task_struct *tsk, const char *buf, bool exec) { - return !tsk; + return 0; } SEC("fexit/__set_task_comm") int BPF_PROG(prog5, struct task_struct *tsk, const char *buf, bool exec) { - return !tsk; + return 0; } char _license[] SEC("license") = "GPL"; -- 2.25.1

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[PATCH AUTOSEL 5.6 006/606] bpf: Fix bug in mmap() implementation for BPF array map

by Sasha Levin

[ Upstream commit 333291ce5055f2039afc907badaf5b66bc1adfdc ] mmap() subsystem allows user-space application to memory-map region with initial page offset. This wasn't taken into account in initial implementation of BPF array memory-mapping. This would result in wrong pages, not taking into account requested page shift, being memory-mmaped into user-space. This patch fixes this gap and adds a test for such scenario. Fixes: fc9702273e2e ("bpf: Add mmap() support for BPF_MAP_TYPE_ARRAY") Signed-off-by: Andrii Nakryiko <andriin(a)fb.com> Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> Acked-by: Yonghong Song <yhs(a)fb.com> Link: https://lore.kernel.org/bpf/20200512235925.3817805-1-andriin@fb.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- kernel/bpf/arraymap.c | 7 ++++++- tools/testing/selftests/bpf/prog_tests/mmap.c | 9 +++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c index 95d77770353c..1d6120fd5ba6 100644 --- a/kernel/bpf/arraymap.c +++ b/kernel/bpf/arraymap.c @@ -486,7 +486,12 @@ static int array_map_mmap(struct bpf_map *map, struct vm_area_struct *vma) if (!(map->map_flags & BPF_F_MMAPABLE)) return -EINVAL; - return remap_vmalloc_range(vma, array_map_vmalloc_addr(array), pgoff); + if (vma->vm_pgoff * PAGE_SIZE + (vma->vm_end - vma->vm_start) > + PAGE_ALIGN((u64)array->map.max_entries * array->elem_size)) + return -EINVAL; + + return remap_vmalloc_range(vma, array_map_vmalloc_addr(array), + vma->vm_pgoff + pgoff); } const struct bpf_map_ops array_map_ops = { diff --git a/tools/testing/selftests/bpf/prog_tests/mmap.c b/tools/testing/selftests/bpf/prog_tests/mmap.c index 16a814eb4d64..b0e789678aa4 100644 --- a/tools/testing/selftests/bpf/prog_tests/mmap.c +++ b/tools/testing/selftests/bpf/prog_tests/mmap.c @@ -197,6 +197,15 @@ void test_mmap(void) CHECK_FAIL(map_data->val[far] != 3 * 321); munmap(tmp2, 4 * page_size); + + /* map all 4 pages, but with pg_off=1 page, should fail */ + tmp1 = mmap(NULL, 4 * page_size, PROT_READ, MAP_SHARED | MAP_FIXED, + data_map_fd, page_size /* initial page shift */); + if (CHECK(tmp1 != MAP_FAILED, "adv_mmap7", "unexpected success")) { + munmap(tmp1, 4 * page_size); + goto cleanup; + } + cleanup: if (bss_mmaped) CHECK_FAIL(munmap(bss_mmaped, bss_sz)); -- 2.25.1

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