3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steffen Klassert <[email protected]>

[ Upstream commit 78ff4be45a4c51d8fb21ad92e4fabb467c6c3eeb ]

We need to initialize the fallback device to have a correct mtu
set on this device. Otherwise the mtu is set to null and the device
is unusable.

Fixes: fd58156e456d ("IPIP: Use ip-tunneling code.")
Cc: Pravin B Shelar <[email protected]>
Signed-off-by: Steffen Klassert <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 net/ipv4/ip_tunnel.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -875,6 +875,7 @@ int ip_tunnel_init_net(struct net *net,
         */
        if (!IS_ERR(itn->fb_tunnel_dev)) {
                itn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;
+               itn->fb_tunnel_dev->mtu = 
ip_tunnel_bind_dev(itn->fb_tunnel_dev);
                ip_tunnel_add(itn, netdev_priv(itn->fb_tunnel_dev));
        }
        rtnl_unlock();


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