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| author | Arnaud Lecomte <contact@arnaud-lcm.com> | 2025-10-25 19:29:41 +0000 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2025-10-28 09:20:27 -0700 |
| commit | 23f852daa4bab4d579110e034e4d513f7d490846 (patch) | |
| tree | 1449ed2f3ad3df3a68e3868afb4a883eef4ef4ea /tools/testing/selftests/bpf/prog_tests/autoload.c | |
| parent | e17d62fedd10ae56e2426858bd0757da544dbc73 (diff) | |
bpf: Fix stackmap overflow check in __bpf_get_stackid()
Syzkaller reported a KASAN slab-out-of-bounds write in __bpf_get_stackid()
when copying stack trace data. The issue occurs when the perf trace
contains more stack entries than the stack map bucket can hold,
leading to an out-of-bounds write in the bucket's data array.
Fixes: ee2a098851bf ("bpf: Adjust BPF stack helper functions to accommodate skip > 0")
Reported-by: syzbot+c9b724fbb41cf2538b7b@syzkaller.appspotmail.com
Signed-off-by: Arnaud Lecomte <contact@arnaud-lcm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/bpf/20251025192941.1500-1-contact@arnaud-lcm.com
Closes: https://syzkaller.appspot.com/bug?extid=c9b724fbb41cf2538b7b
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/autoload.c')
0 files changed, 0 insertions, 0 deletions