netdev - [PATCH net-next v2 2/2] skbuff: Fix not waking applications when errors are enqueued

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Date:   Wed, 14 Mar 2018 14:54:37 -0700
From:   Vinicius Costa Gomes <vinicius.gomes@...el.com>
To:     netdev@...r.kernel.org
Cc:     Vinicius Costa Gomes <vinicius.gomes@...el.com>,
        randy.e.witt@...el.com, davem@...emloft.net, eric.dumazet@...il.com
Subject: [PATCH net-next v2 2/2] skbuff: Fix not waking applications when errors are enqueued

When errors are enqueued to the error queue via sock_queue_err_skb()
function, it is possible that the waiting application is not notified.

Calling 'sk->sk_data_ready()' would not notify applications that
selected only POLLERR events in poll() (for example).

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Randy E. Witt <randy.e.witt@...el.com>
Reviewed-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
---
 net/core/skbuff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 715c13495ba6..6def3534f509 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4181,7 +4181,7 @@ int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)
 
 	skb_queue_tail(&sk->sk_error_queue, skb);
 	if (!sock_flag(sk, SOCK_DEAD))
-		sk->sk_data_ready(sk);
+		sk->sk_error_report(sk);
 	return 0;
 }
 EXPORT_SYMBOL(sock_queue_err_skb);
-- 
2.16.2