af_unix: Fix data race around sk->sk_err.

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[ Upstream commit b192812905 ]

As with sk->sk_shutdown shown in the previous patch, sk->sk_err can be
read locklessly by unix_dgram_sendmsg().

Let's use READ_ONCE() for sk_err as well.

Note that the writer side is marked by commit cc04410af7 ("af_unix:
annotate lockless accesses to sk->sk_err").

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Kuniyuki Iwashima 2023-09-01 17:27:08 -07:00 • committed by Greg Kroah-Hartman

parent ce3aa88cec

commit 2100bbf55e

1 changed files with 1 additions and 1 deletions

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net/core/sock.c

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