This is a note to let you know that I've just added the patch titled
net: add missing data-race annotation for sk_ll_usec
to the 4.19-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-data-race-annotation-for-sk_ll_usec.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 683d6085ad2e0686bac1e20a4e5511c4e9f24eb4
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Fri Jul 28 15:03:17 2023 +0000
net: add missing data-race annotation for sk_ll_usec
[ Upstream commit e5f0d2dd3c2faa671711dac6d3ff3cef307bcfe3 ]
In a prior commit I forgot that sk_getsockopt() reads
sk->sk_ll_usec without holding a lock.
Fixes: 0dbffbb5335a ("net: annotate data race around sk_ll_usec")
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 f112862fe0682..3e6da3694a5a5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1349,7 +1349,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
#ifdef CONFIG_NET_RX_BUSY_POLL
case SO_BUSY_POLL:
- v.val = sk->sk_ll_usec;
+ v.val = READ_ONCE(sk->sk_ll_usec);
break;
#endif
