This is a note to let you know that I've just added the patch titled
net: add missing READ_ONCE(sk->sk_rcvlowat) annotation
to the 5.10-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_rcvlowat-annotation.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6c300a0f2fee462a11ff6ddf170cf302044f8943
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Fri Jul 28 15:03:11 2023 +0000
net: add missing READ_ONCE(sk->sk_rcvlowat) annotation
[ Upstream commit e6d12bdb435d23ff6c1890c852d85408a2f496ee ]
In a prior commit, I forgot to change sk_getsockopt()
when reading sk->sk_rcvlowat locklessly.
Fixes: eac66402d1c3 ("net: annotate sk->sk_rcvlowat 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 c7ba7d82eb36c..66aab0981f666 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1423,7 +1423,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
break;
case SO_RCVLOWAT:
- v.val = sk->sk_rcvlowat;
+ v.val = READ_ONCE(sk->sk_rcvlowat);
break;
case SO_SNDLOWAT:
