commit aef950b4ba3196622a5bd5e21ab1d63f30658285
author Wei Yongjun <yongjun_wei@trendmicro.com.cn> Tue Dec 27 22:32:41 2011 -0500
committer David S. Miller <davem@davemloft.net> Tue Dec 27 22:32:41 2011 -0500
tree f4cb91f4517a041ef95c28ad50039b0b2ae6b137
parent c43c5f39584c0f388a7e5372312c2c48221a4415

packet: fix possible dev refcnt leak when bind fail

If bind is fail when bind is called after set PACKET_FANOUT
sock option, the dev refcnt will leak.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/packet/af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 3891702..d9d4970 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2448,8 +2448,12 @@
 {
 	struct packet_sock *po = pkt_sk(sk);
 
-	if (po->fanout)
+	if (po->fanout) {
+		if (dev)
+			dev_put(dev);
+
 		return -EINVAL;
+	}
 
 	lock_sock(sk);