diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 5e86fd9dc8573856a6e4f259ea1504054f25d9c1..f0aaf1c8f1a8403142e8096551a6ea5e414995ff 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -408,7 +408,7 @@ void __net_exit fib6_notifier_exit(struct net *net);
 unsigned int fib6_tables_seq_read(struct net *net);
 int fib6_tables_dump(struct net *net, struct notifier_block *nb);
 
-void fib6_update_sernum(struct rt6_info *rt);
+void fib6_update_sernum(struct net *net, struct rt6_info *rt);
 void fib6_update_sernum_upto_root(struct net *net, struct rt6_info *rt);
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index deab2db6692eb526e88c85c5e9e20e52020c9e94..74d2a3748e2f19a6cde8c36af3f9bc060f4a9f02 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -105,9 +105,8 @@ enum {
 	FIB6_NO_SERNUM_CHANGE = 0,
 };
 
-void fib6_update_sernum(struct rt6_info *rt)
+void fib6_update_sernum(struct net *net, struct rt6_info *rt)
 {
-	struct net *net = dev_net(rt->dst.dev);
 	struct fib6_node *fn;
 
 	fn = rcu_dereference_protected(rt->rt6i_node,
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1d738bfe893bc0b8bc4a16311abd1809b0c866db..0a99cda9fd7b915725c79e37c173ed900f3a14d3 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1352,7 +1352,7 @@ static int rt6_insert_exception(struct rt6_info *nrt,
 	/* Update fn->fn_sernum to invalidate all cached dst */
 	if (!err) {
 		spin_lock_bh(&ort->rt6i_table->tb6_lock);
-		fib6_update_sernum(ort);
+		fib6_update_sernum(net, ort);
 		spin_unlock_bh(&ort->rt6i_table->tb6_lock);
 		fib6_force_start_gc(net);
 	}
@@ -3786,11 +3786,11 @@ void rt6_multipath_rebalance(struct rt6_info *rt)
 static int fib6_ifup(struct rt6_info *rt, void *p_arg)
 {
 	const struct arg_netdev_event *arg = p_arg;
-	const struct net *net = dev_net(arg->dev);
+	struct net *net = dev_net(arg->dev);
 
 	if (rt != net->ipv6.ip6_null_entry && rt->dst.dev == arg->dev) {
 		rt->rt6i_nh_flags &= ~arg->nh_flags;
-		fib6_update_sernum_upto_root(dev_net(rt->dst.dev), rt);
+		fib6_update_sernum_upto_root(net, rt);
 		rt6_multipath_rebalance(rt);
 	}
 
@@ -3869,7 +3869,7 @@ static int fib6_ifdown(struct rt6_info *rt, void *p_arg)
 {
 	const struct arg_netdev_event *arg = p_arg;
 	const struct net_device *dev = arg->dev;
-	const struct net *net = dev_net(dev);
+	struct net *net = dev_net(dev);
 
 	if (rt == net->ipv6.ip6_null_entry)
 		return 0;
@@ -3892,7 +3892,7 @@ static int fib6_ifdown(struct rt6_info *rt, void *p_arg)
 			}
 			rt6_multipath_nh_flags_set(rt, dev, RTNH_F_DEAD |
 						   RTNH_F_LINKDOWN);
-			fib6_update_sernum(rt);
+			fib6_update_sernum(net, rt);
 			rt6_multipath_rebalance(rt);
 		}
 		return -2;