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Message-ID: <tencent_DC4901C65DB41D86CD613F3ACC41EA143808@qq.com>
Date: Sat, 9 Mar 2024 21:34:40 +0800
From: linke li <lilinke99@...com>
To:
Cc: lilinke99@...com,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Kuniyuki Iwashima <kuniyu@...zon.com>,
Willem de Bruijn <willemb@...gle.com>,
Abel Wu <wuyun.abel@...edance.com>,
Breno Leitao <leitao@...ian.org>,
Alexander Mikhalitsyn <alexander@...alicyn.com>,
David Howells <dhowells@...hat.com>,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] net: mark racy access on sk->sk_rcvbuf
sk->sk_rcvbuf can be changed by other threads. Mark this as benign using
READ_ONCE.
This patch is aimed at reducing the number of benign races reported by
KCSAN in order to focus future debugging effort on harmful races.
Signed-off-by: linke li <lilinke99@...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 5e78798456fd..4c5524e70534 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -551,7 +551,7 @@ int __sk_receive_skb(struct sock *sk, struct sk_buff *skb,
skb->dev = NULL;
- if (sk_rcvqueues_full(sk, sk->sk_rcvbuf)) {
+ if (sk_rcvqueues_full(sk, READ_ONCE(sk->sk_rcvbuf))) {
atomic_inc(&sk->sk_drops);
goto discard_and_relse;
}
--
2.39.3 (Apple Git-146)
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