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(parent: b831ebf) | patch
bpf: Fixes possible race in update_prog_stats() for 32bit arches
authorEric Dumazet <edumazet@google.com>
Tue, 26 Oct 2021 21:41:32 +0000 (14:41 -0700)
committerAlexei Starovoitov <ast@kernel.org>
Wed, 27 Oct 2021 18:13:52 +0000 (11:13 -0700)
commit1af93b1461a56859e4e548b14a1c298db18b4bff
treeff58a7ed0c96b37015fb26af06e914d4677256e7tree | snapshot
parentb831ebf557070d4996f0e5c580179abd1f19be2acommit | diff
bpf: Fixes possible race in update_prog_stats() for 32bit arches

It seems update_prog_stats() suffers from same issue fixed
in the prior patch:

As it can run while interrupts are enabled, it could
be re-entered and the u64_stats syncp could be mangled.

Fixes: 2cefb9dd93cc ("bpf: Introduce BPF trampoline")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211026214133.3114279-3-eric.dumazet@gmail.com
kernel/bpf/trampoline.c diff | blob | history
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