This is a note to let you know that I've just added the patch titled
net: add missing READ_ONCE(sk->sk_sndbuf) annotation
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-add-missing-read_once-sk-sk_sndbuf-annotation.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 01ab33478ac6646afcb236b3c1ecf6084c4d30c4
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Fri Jul 28 15:03:13 2023 +0000
net: add missing READ_ONCE(sk->sk_sndbuf) annotation
[ Upstream commit 74bc084327c643499474ba75df485607da37dd6e ]
In a prior commit, I forgot to change sk_getsockopt()
when reading sk->sk_sndbuf locklessly.
Fixes: e292f05e0df7 ("tcp: annotate sk->sk_sndbuf lockless reads")
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/core/sock.c b/net/core/sock.c
index a73111be68581..e6d26cfba32d5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1258,7 +1258,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
break;
case SO_SNDBUF:
- v.val = sk->sk_sndbuf;
+ v.val = READ_ONCE(sk->sk_sndbuf);
break;
case SO_RCVBUF:
