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| author |   Andrii Nakryiko <andriin@fb.com> | 2020-04-28 18:21:09 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-04-28 19:48:05 -0700 |
| commit | 36d0b6159f6a6f51f600bf1777702f7036fb9839 (patch) | |
| tree | 1c5155a79da98960060508bf5fa5b464b4ee3fcc | |
| parent | libbpf: Fix huge memory leak in libbpf_find_vmlinux_btf_id() (diff) | |
| download | linux-dev-36d0b6159f6a6f51f600bf1777702f7036fb9839.tar.xz linux-dev-36d0b6159f6a6f51f600bf1777702f7036fb9839.zip | |
selftests/bpf: Disable ASAN instrumentation for mmap()'ed memory read
AddressSanitizer assumes that all memory dereferences are done against memory
allocated by sanitizer's malloc()/free() code and not touched by anyone else.
Seems like this doesn't hold for perf buffer memory. Disable instrumentation
on perf buffer callback function.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200429012111.277390-10-andriin@fb.com
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/perf_buffer.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/perf_buffer.c b/tools/testing/selftests/bpf/prog_tests/perf_buffer.c index 1450ea2dd4cc..a122ce3b360e 100644 --- a/tools/testing/selftests/bpf/prog_tests/perf_buffer.c +++ b/tools/testing/selftests/bpf/prog_tests/perf_buffer.c @@ -6,6 +6,11 @@ #include <test_progs.h> #include "bpf/libbpf_internal.h" +/* AddressSanitizer sometimes crashes due to data dereference below, due to + * this being mmap()'ed memory. Disable instrumentation with + * no_sanitize_address attribute + */ +__attribute__((no_sanitize_address)) static void on_sample(void *ctx, int cpu, void *data, __u32 size) { int cpu_data = *(int *)data, duration = 0; |