--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1492,7 +1492,7 @@ static void ipv4_dst_destroy(struct dst_entry *dst)
 
 void rt_flush_dev(struct net_device *dev)
 {
-	struct net *net = dev_net(dev);
+	bool changed = false;
 	struct rtable *rt;
 	int cpu;
 
@@ -1503,12 +1503,15 @@ void rt_flush_dev(struct net_device *dev)
 		list_for_each_entry(rt, &ul->head, rt_uncached) {
 			if (rt->dst.dev != dev)
 				continue;
-			rt->dst.dev = net->loopback_dev;
+			rt->dst.dev = init_net.loopback_dev;
 			dev_hold(rt->dst.dev);
 			dev_put(dev);
+			changed = true;
 		}
 		spin_unlock_bh(&ul->lock);
 	}
+	if (changed)
+		printk("rt_flush_dev(%u)\n", netdev_refcnt_read(init_net.loopback_dev));
 }
 
 static bool rt_cache_valid(const struct rtable *rt)