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 d93c030..0430698 100644 (file)
--- 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;
 }