netdev - [PATCH net-next 1/8] net: use DEBUG_NET_WARN_ON_ONCE() in __release

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Date:   Tue,  7 Jun 2022 10:17:25 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next 1/8] net: use DEBUG_NET_WARN_ON_ONCE() in __release_sock()

From: Eric Dumazet <edumazet@...gle.com>

Check against skb dst in socket backlog has never triggered
in past years.

Keep the check only for CONFIG_DEBUG_NET=y builds.

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 2ff40dd0a7a652029cca1743109286b50c2a17f3..f5062d9e122275a511efbc4d30de2ee501182498 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2844,7 +2844,7 @@ void __release_sock(struct sock *sk)
 		do {
 			next = skb->next;
 			prefetch(next);
-			WARN_ON_ONCE(skb_dst_is_noref(skb));
+			DEBUG_NET_WARN_ON_ONCE(skb_dst_is_noref(skb));
 			skb_mark_not_on_list(skb);
 			sk_backlog_rcv(sk, skb);
 
-- 
2.36.1.255.ge46751e96f-goog