From: David Stevens <dlstevens@us.ibm.com>
Date: Tue, 18 Mar 2014 16:32:29 +0000 (-0400)
Subject: vxlan: fix potential NULL dereference in arp_reduce()
X-Git-Tag: submit/tizen_common/20140905.094502~53
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=121db7fafaf1bd923e64b56a897ba5ebe576da9d;p=sdk%2Femulator%2Femulator-kernel.git

vxlan: fix potential NULL dereference in arp_reduce()

[ Upstream commit 7346135dcd3f9b57f30a5512094848c678d7143e ]

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@us.ibm.com>
Acked-by: Cong Wang <cwang@twopensource.com>

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 32c45c3d820d..020fe03f37c0 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1212,6 +1212,9 @@ 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;