From: Guillaume Nault <g.nault@alphalink.fr>
Date: Mon, 15 Feb 2016 16:01:10 +0000 (+0100)
Subject: pppoe: fix reference counting in PPPoE proxy
X-Git-Tag: firefly_0821_release~176^2~475^2~379
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=26fd5ed6e8ad66c86eb720cf85d1230c9b45a5f9;p=firefly-linux-kernel-4.4.55.git

pppoe: fix reference counting in PPPoE proxy

[ Upstream commit 29e73269aa4d36f92b35610c25f8b01c789b0dc8 ]

Drop reference on the relay_po socket when __pppoe_xmit() succeeds.
This is already handled correctly in the error path.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index 0a37f840fcc5..4e0068e775f9 100644
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -395,6 +395,8 @@ static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
 
 		if (!__pppoe_xmit(sk_pppox(relay_po), skb))
 			goto abort_put;
+
+		sock_put(sk_pppox(relay_po));
 	} else {
 		if (sock_queue_rcv_skb(sk, skb))
 			goto abort_kfree;