netdev - [PATCH net 10/11] net: add missing data-race annotation for sk_ll

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Message-ID: <20230728150318.2055273-11-edumazet@google.com>
Date: Fri, 28 Jul 2023 15:03:17 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: Jamal Hadi Salim <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, 
	Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net 10/11] net: add missing data-race annotation for sk_ll_usec

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@...gle.com>
---
 net/core/sock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index d57acaee42d4b1204d34baf6f8ab64cd5a0c3abf..f11e19c7edfb46475b32cee3d1af1df45442f40c 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1900,7 +1900,7 @@ int sk_getsockopt(struct sock *sk, 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;
 	case SO_PREFER_BUSY_POLL:
 		v.val = READ_ONCE(sk->sk_prefer_busy_poll);
-- 
2.41.0.585.gd2178a4bd4-goog