From: Roopa Prabhu <roopa@cumulusnetworks.com>
Date: Tue, 4 Aug 2015 13:36:24 +0000 (-0700)
Subject: af_mpls: add null dev check in find_outdev
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3dcb615e6841eb945a49f605743a6923ed591400;p=openwrt%2Fstaging%2Fblogic.git

af_mpls: add null dev check in find_outdev

This patch adds null dev check for the 'cfg->rc_via_table ==
NEIGH_LINK_TABLE or dev_get_by_index() failed' case

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index d93c0301ad23..04306989d054 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -411,6 +411,9 @@ static struct net_device *find_outdev(struct net *net,
 		dev = dev_get_by_index(net, cfg->rc_ifindex);
 	}
 
+	if (!dev)
+		return ERR_PTR(-ENODEV);
+
 	return dev;
 }