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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-11-23 16:23:14 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-11-26 00:14:06 +0100 |
| commit | 401891a9debaf0a684502f2aaecf53448cee9414 (patch) | |
| tree | 0aa7859715d0c72758e24fe0d0665f5adad02528 /tools/lib/bpf/libbpf.c | |
| parent | 1144ab9bdf3430e1b5b3f22741e5283841951add (diff) | |
| download | linux-401891a9debaf0a684502f2aaecf53448cee9414.tar.bz2 | |
libbpf: Fix potential misaligned memory access in btf_ext__new()
Perform a memory copy before we do the sanity checks of btf_ext_hdr.
This prevents misaligned memory access if raw btf_ext data is not 4-byte
aligned ([0]).
While at it, also add missing const qualifier.
[0] Closes: https://github.com/libbpf/libbpf/issues/391
Fixes: 2993e0515bb4 ("tools/bpf: add support to read .BTF.ext sections")
Reported-by: Evgeny Vereshchagin <evvers@ya.ru>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-3-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/libbpf.c')
0 files changed, 0 insertions, 0 deletions