bpf: Fixes possible race in update_prog_stats() for 32bit arches

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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: fec56f5890 ("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

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Eric Dumazet 2021-10-26 14:41:32 -07:00 • committed by Alexei Starovoitov

parent f941eadd8d

commit d979617aa8

1 changed files with 4 additions and 2 deletions

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kernel/bpf/trampoline.c

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