netdev - bridge: Fix OOM crash in deliver

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Message-ID: <20100616040219.GA18000@gondor.apana.org.au>
Date:	Wed, 16 Jun 2010 14:02:19 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:	Mark Wagner <mwagner@...hat.com>
Subject: bridge: Fix OOM crash in deliver_clone

Hi Dave:

bridge: Fix OOM crash in deliver_clone

The bridge multicast patches introduced an OOM crash in the forward
path, when deliver_clone fails to clone the skb.

This patch fixes it.

Reported-by: Mark Wagner <mwagner@...hat.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 6e97711..cbfe87f 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -130,10 +130,10 @@ static int deliver_clone(const struct net_bridge_port *prev,
 			 void (*__packet_hook)(const struct net_bridge_port *p,
 					       struct sk_buff *skb))
 {
+	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
+
 	skb = skb_clone(skb, GFP_ATOMIC);
 	if (!skb) {
-		struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
-
 		dev->stats.tx_dropped++;
 		return -ENOMEM;
 	}

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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