selftests/bpf: Prevent misaligned memory access in get_stack_raw_tp test

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Perfbuf doesn't guarantee 8-byte alignment of the data like BPF ringbuf
does, so struct get_stack_trace_t can arrive not properly aligned for
subsequent u64 accesses. Easiest fix is to just copy data locally.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-10-andrii@kernel.org

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Andrii Nakryiko 2021-11-23 16:23:21 -08:00 • committed by Daniel Borkmann

parent 3bd0233f38

commit 6c4dedb755

1 changed files with 10 additions and 4 deletions

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tools/testing/selftests/bpf/prog_tests/get_stack_raw_tp.c

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