netdev - [PATCH net] VXLAN: fix potential NULL dereference in arp

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Message-Id: <201403181632.s2IGWTjT003613@lab1.dls>
Date:	Tue, 18 Mar 2014 12:32:29 -0400
From:	David L Stevens <dlstevens@...ibm.com>
To:	David Miller <davem@...emloft.net>,
	Stephen Hemminger <shemminger@...tta.com>
cc:	netdev@...r.kernel.org
Subject: [PATCH net] VXLAN: fix potential NULL dereference in arp_reduce()


	This patch fixes a NULL pointer dereference in the event of an
skb allocation failure in arp_reduce().

Signed-Off-By: David L Stevens <dlstevens@...ibm.com>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index eb59b14..570792c 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1315,6 +1315,9 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
 
 		neigh_release(n);
 
+		if (reply == NULL)
+			goto out;
+
 		skb_reset_mac_header(reply);
 		__skb_pull(reply, skb_network_offset(reply));
 		reply->ip_summed = CHECKSUM_UNNECESSARY;

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