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: v3.13.10~34
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1ef50212d122b0e775fb234b4c1523d52859acb;p=thirdparty%2Fkernel%2Fstable.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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 02479739eaa0d..e15b255ecaf1d 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1208,6 +1208,9 @@ 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;