From: Kuniyuki Iwashima Date: Tue, 4 Jun 2024 16:52:41 +0000 (-0700) Subject: af_unix: Annotate data-race of sk->sk_shutdown in sk_diag_fill(). X-Git-Tag: v5.4.279~163 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ba387948b76d23cf44d9484afb250f01fd244607;p=thirdparty%2Fkernel%2Fstable.git af_unix: Annotate data-race of sk->sk_shutdown in sk_diag_fill(). [ Upstream commit efaf24e30ec39ebbea9112227485805a48b0ceb1 ] While dumping sockets via UNIX_DIAG, we do not hold unix_state_lock(). Let's use READ_ONCE() to read sk->sk_shutdown. Fixes: e4e541a84863 ("sock-diag: Report shutdown for inet and unix sockets (v2)") Signed-off-by: Kuniyuki Iwashima Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- diff --git a/net/unix/diag.c b/net/unix/diag.c index 5bc5cb83cc6e4..7066a36234106 100644 --- a/net/unix/diag.c +++ b/net/unix/diag.c @@ -164,7 +164,7 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r sock_diag_put_meminfo(sk, skb, UNIX_DIAG_MEMINFO)) goto out_nlmsg_trim; - if (nla_put_u8(skb, UNIX_DIAG_SHUTDOWN, sk->sk_shutdown)) + if (nla_put_u8(skb, UNIX_DIAG_SHUTDOWN, READ_ONCE(sk->sk_shutdown))) goto out_nlmsg_trim; if ((req->udiag_show & UDIAG_SHOW_UID) &&