selftests/bpf: Prevent out-of-bounds stack access in test_bpffs

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Buf can be not zero-terminated leading to strstr() to access data beyond
the intended buf[] array. Fix by forcing zero termination.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-12-andrii@kernel.org

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

parent e2e0d90c55

commit 57428298b5

1 changed files with 3 additions and 1 deletions

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

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