FAILED: patch "[PATCH] net: ip6_tunnel: Unregister catch-all devices" failed to apply to 4.14-stable tree

The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 941ea91e87a6e879ed82dad4949f6234f2702bec Mon Sep 17 00:00:00 2001
From: Hristo Venev <[email protected]>
Date: Mon, 12 Apr 2021 20:41:17 +0300
Subject: [PATCH] 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.

index 3fa0eca5a06f..42fe7db6bbb3 100644
@@ -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)