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| author | Alexei Starovoitov <[email protected]> | 2019-11-14 10:57:14 -0800 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2019-11-15 23:44:20 +0100 |
| commit | 9cc31b3a092d9bf2a18f09ad77e727ddb42a5b1e (patch) | |
| tree | 36be1bd2c248be20e0688560b3b678357807444e /kernel/bpf/syscall.c | |
| parent | 9fd4a39dc7fe734d26eb89ea97e8c91331c6378c (diff) | |
bpf: Fix race in btf_resolve_helper_id()
btf_resolve_helper_id() caching logic is a bit racy, since under root the
verifier can verify several programs in parallel. Fix it with READ/WRITE_ONCE.
Fix the type as well, since error is also recorded.
Fixes: a7658e1a4164 ("bpf: Check types of arguments passed into helpers")
Signed-off-by: Alexei Starovoitov <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Song Liu <[email protected]>
Acked-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'kernel/bpf/syscall.c')
0 files changed, 0 insertions, 0 deletions