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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-10-22 17:31:56 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-10-22 17:33:31 -0700 |
| commit | 5245dafe3d49efba4d3285cf27ee1cc1eeafafc6 (patch) | |
| tree | 62ded1edf9df0e669f175a35d0a8f3633f82d11b /tools/testing/selftests/bpf/prog_tests/resolve_btfids.c | |
| parent | 1c508843700423f36bead47a78169f313f5668f5 (diff) | |
libbpf: Fix overflow in BTF sanity checks
btf_header's str_off+str_len or type_off+type_len can overflow as they
are u32s. This will lead to bypassing the sanity checks during BTF
parsing, resulting in crashes afterwards. Fix by using 64-bit signed
integers for comparison.
Fixes: d8123624506c ("libbpf: Fix BTF data layout checks and allow empty BTF")
Reported-by: Evgeny Vereshchagin <evvers@ya.ru>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211023003157.726961-1-andrii@kernel.org
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/resolve_btfids.c')
0 files changed, 0 insertions, 0 deletions