[PATCH net] tcp: Use WARN_ON_ONCE() in tcp_read_skb()

[Peilin Ye]

From: Peilin Ye <peilin.ye@xxxxxxxxxxxxx>

Prevent tcp_read_skb() from flooding the syslog.

Suggested-by: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
Signed-off-by: Peilin Ye <peilin.ye@xxxxxxxxxxxxx>
---
 net/ipv4/tcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 8230be00ecca..9251c99d3cfd 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1766,7 +1766,7 @@ int tcp_read_skb(struct sock *sk, skb_read_actor_t recv_actor)
 		return 0;
 
 	__skb_unlink(skb, &sk->sk_receive_queue);
-	WARN_ON(!skb_set_owner_sk_safe(skb, sk));
+	WARN_ON_ONCE(!skb_set_owner_sk_safe(skb, sk));
 	copied = recv_actor(sk, skb);
 	if (copied >= 0) {
 		seq += copied;
-- 
2.20.1