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af_unix: Annotate data-race of sk->sk_state in unix_accept().

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[ Upstream commit 1b536948e8 ]

Once sk->sk_state is changed to TCP_LISTEN, it never changes.

unix_accept() takes the advantage and reads sk->sk_state without
holding unix_state_lock().

Let's use READ_ONCE() there.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kuniyuki Iwashima 2024-06-04 09:52:32 -07:00 committed by Greg Kroah-Hartman
parent b82c97a79b
commit 6fdc1152af
1 changed files with 1 additions and 1 deletions
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2
net/unix/af_unix.c
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@ -1710,7 +1710,7 @@ static int unix_accept(struct socket *sock, struct socket *newsock, int flags,
goto out;
err = -EINVAL;
if (sk->sk_state != TCP_LISTEN)
if (READ_ONCE(sk->sk_state) != TCP_LISTEN)
goto out;
/* If socket state is TCP_LISTEN it cannot change (for now...),