net: ip6_tunnel: Unregister catch-all devices

Similarly to the sit case, we need to remove the tunnels with no
addresses that have been moved to another network namespace.

Fixes: 92acedce062ce ("ip6tnl: add x-netns support")
Signed-off-by: Hristo Venev <hristo@venev.name>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 3fa0eca5a06f8af1afef3a497f9411e98007b149..42fe7db6bbb37ed09005239680d1356b8bbcd308 100644 (file)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -2244,6 +2244,16 @@ static void __net_exit ip6_tnl_destroy_tunnels(struct net *net, struct list_head
                        t = rtnl_dereference(t->next);
                }
        }
+
+       t = rtnl_dereference(ip6n->tnls_wc[0]);
+       while (t) {
+               /* If dev is in the same netns, it has already
+                * been added to the list by the previous loop.
+                */
+               if (!net_eq(dev_net(t->dev), net))
+                       unregister_netdevice_queue(t->dev, list);
+               t = rtnl_dereference(t->next);
+       }
 }
 
 static int __net_init ip6_tnl_init_net(struct net *net)