Subject: [PATCH 50/53] skbuff: Fix not waking applications when errors are enqueued

From: Vinicius Costa Gomes <[email-masked]>
Date: Wed, 14 Mar 2018 13:32:09 -0700

[ Upstream commit 6e5d58fdc9bedd0255a8781b258f10bbdc63e975 ]

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 <[email-masked]>
Reviewed-by: Eric Dumazet <[email-masked]>
Signed-off-by: Vinicius Costa Gomes <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 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 08f574081315..3538ba8771e9 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4173,7 +4173,7 @@ 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);
-- 
2.14.3