From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Wed, 28 Dec 2011 03:32:41 +0000 (-0500)
Subject: packet: fix possible dev refcnt leak when bind fail
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=aef950b4ba3196622a5bd5e21ab1d63f30658285;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

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>
---

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 3891702b81d..d9d4970b9b0 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2448,8 +2448,12 @@ static int packet_do_bind(struct sock *sk, struct net_device *dev, __be16 protoc
 {
 	struct packet_sock *po = pkt_sk(sk);
 
-	if (po->fanout)
+	if (po->fanout) {
+		if (dev)
+			dev_put(dev);
+
 		return -EINVAL;
+	}
 
 	lock_sock(sk);