diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 9ed5f69f84e2..ad5ce6652623 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -524,13 +524,14 @@ static void __build_flow_key(const struct net *net, struct flowi4 *fl4,
 static void build_skb_flow_key(struct flowi4 *fl4, const struct sk_buff *skb,
 			       const struct sock *sk)
 {
+	const struct net *net = dev_net(skb->dev);
 	const struct iphdr *iph = ip_hdr(skb);
 	int oif = skb->dev->ifindex;
 	u8 tos = RT_TOS(iph->tos);
 	u8 prot = iph->protocol;
 	u32 mark = skb->mark;
 
-	__build_flow_key(sock_net(sk), fl4, sk, iph, oif, tos, prot, mark, 0);
+	__build_flow_key(net, fl4, sk, iph, oif, tos, prot, mark, 0);
 }
 
 static void build_sk_flow_key(struct flowi4 *fl4, const struct sock *sk)