diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 474d6bbc158c..ac2da4e11d5e 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -159,6 +159,16 @@ static inline bool inet6_is_jumbogram(const struct sk_buff *skb)
 }
 
 /* can not be used in TCP layer after tcp_v6_fill_cb */
+static inline int inet6_sdif(const struct sk_buff *skb)
+{
+#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
+	if (skb && ipv6_l3mdev_skb(IP6CB(skb)->flags))
+		return IP6CB(skb)->iif;
+#endif
+	return 0;
+}
+
+/* can not be used in TCP layer after tcp_v6_fill_cb */
 static inline bool inet6_exact_dif_match(struct net *net, struct sk_buff *skb)
 {
 #if defined(CONFIG_NET_L3_MASTER_DEV)
diff --git a/include/net/udp.h b/include/net/udp.h
index 826c713d5a48..20dcdca4e85c 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -298,7 +298,7 @@ struct sock *udp6_lib_lookup(struct net *net,
 struct sock *__udp6_lib_lookup(struct net *net,
 			       const struct in6_addr *saddr, __be16 sport,
 			       const struct in6_addr *daddr, __be16 dport,
-			       int dif, struct udp_table *tbl,
+			       int dif, int sdif, struct udp_table *tbl,
 			       struct sk_buff *skb);
 struct sock *udp6_lib_lookup_skb(struct sk_buff *skb,
 				 __be16 sport, __be16 dport);
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index 1f07fe109535..d0390d844ac8 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -53,7 +53,7 @@ static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
 				req->id.idiag_sport,
 				(struct in6_addr *)req->id.idiag_dst,
 				req->id.idiag_dport,
-				req->id.idiag_if, tbl, NULL);
+				req->id.idiag_if, 0, tbl, NULL);
 #endif
 	if (sk && !refcount_inc_not_zero(&sk->sk_refcnt))
 		sk = NULL;
@@ -198,7 +198,7 @@ static int __udp_diag_destroy(struct sk_buff *in_skb,
 					req->id.idiag_dport,
 					(struct in6_addr *)req->id.idiag_src,
 					req->id.idiag_sport,
-					req->id.idiag_if, tbl, NULL);
+					req->id.idiag_if, 0, tbl, NULL);
 	}
 #endif
 	else {
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 578142b7ca3e..d96a877798a7 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -129,7 +129,7 @@ static void udp_v6_rehash(struct sock *sk)
 static int compute_score(struct sock *sk, struct net *net,
 			 const struct in6_addr *saddr, __be16 sport,
 			 const struct in6_addr *daddr, unsigned short hnum,
-			 int dif, bool exact_dif)
+			 int dif, int sdif, bool exact_dif)
 {
 	int score;
 	struct inet_sock *inet;
@@ -161,9 +161,13 @@ static int compute_score(struct sock *sk, struct net *net,
 	}
 
 	if (sk->sk_bound_dev_if || exact_dif) {
-		if (sk->sk_bound_dev_if != dif)
+		bool dev_match = (sk->sk_bound_dev_if == dif ||
+				  sk->sk_bound_dev_if == sdif);
+
+		if (exact_dif && !dev_match)
 			return -1;
-		score++;
+		if (sk->sk_bound_dev_if && dev_match)
+			score++;
 	}
 
 	if (sk->sk_incoming_cpu == raw_smp_processor_id())
@@ -175,9 +179,9 @@ static int compute_score(struct sock *sk, struct net *net,
 /* called with rcu_read_lock() */
 static struct sock *udp6_lib_lookup2(struct net *net,
 		const struct in6_addr *saddr, __be16 sport,
-		const struct in6_addr *daddr, unsigned int hnum, int dif,
-		bool exact_dif, struct udp_hslot *hslot2,
-		struct sk_buff *skb)
+		const struct in6_addr *daddr, unsigned int hnum,
+		int dif, int sdif, bool exact_dif,
+		struct udp_hslot *hslot2, struct sk_buff *skb)
 {
 	struct sock *sk, *result;
 	int score, badness, matches = 0, reuseport = 0;
@@ -187,7 +191,7 @@ static struct sock *udp6_lib_lookup2(struct net *net,
 	badness = -1;
 	udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) {
 		score = compute_score(sk, net, saddr, sport,
-				      daddr, hnum, dif, exact_dif);
+				      daddr, hnum, dif, sdif, exact_dif);
 		if (score > badness) {
 			reuseport = sk->sk_reuseport;
 			if (reuseport) {
@@ -214,10 +218,10 @@ static struct sock *udp6_lib_lookup2(struct net *net,
 
 /* rcu_read_lock() must be held */
 struct sock *__udp6_lib_lookup(struct net *net,
-				      const struct in6_addr *saddr, __be16 sport,
-				      const struct in6_addr *daddr, __be16 dport,
-				      int dif, struct udp_table *udptable,
-				      struct sk_buff *skb)
+			       const struct in6_addr *saddr, __be16 sport,
+			       const struct in6_addr *daddr, __be16 dport,
+			       int dif, int sdif, struct udp_table *udptable,
+			       struct sk_buff *skb)
 {
 	struct sock *sk, *result;
 	unsigned short hnum = ntohs(dport);
@@ -235,7 +239,7 @@ struct sock *__udp6_lib_lookup(struct net *net,
 			goto begin;
 
 		result = udp6_lib_lookup2(net, saddr, sport,
-					  daddr, hnum, dif, exact_dif,
+					  daddr, hnum, dif, sdif, exact_dif,
 					  hslot2, skb);
 		if (!result) {
 			unsigned int old_slot2 = slot2;
@@ -250,7 +254,7 @@ struct sock *__udp6_lib_lookup(struct net *net,
 				goto begin;
 
 			result = udp6_lib_lookup2(net, saddr, sport,
-						  daddr, hnum, dif,
+						  daddr, hnum, dif, sdif,
 						  exact_dif, hslot2,
 						  skb);
 		}
@@ -261,7 +265,7 @@ struct sock *__udp6_lib_lookup(struct net *net,
 	badness = -1;
 	sk_for_each_rcu(sk, &hslot->head) {
 		score = compute_score(sk, net, saddr, sport, daddr, hnum, dif,
-				      exact_dif);
+				      sdif, exact_dif);
 		if (score > badness) {
 			reuseport = sk->sk_reuseport;
 			if (reuseport) {
@@ -294,7 +298,7 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
 
 	return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport,
 				 &iph->daddr, dport, inet6_iif(skb),
-				 udptable, skb);
+				 inet6_sdif(skb), udptable, skb);
 }
 
 struct sock *udp6_lib_lookup_skb(struct sk_buff *skb,
@@ -304,7 +308,7 @@ struct sock *udp6_lib_lookup_skb(struct sk_buff *skb,
 
 	return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport,
 				 &iph->daddr, dport, inet6_iif(skb),
-				 &udp_table, skb);
+				 inet6_sdif(skb), &udp_table, skb);
 }
 EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb);
 
@@ -320,7 +324,7 @@ struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be
 	struct sock *sk;
 
 	sk =  __udp6_lib_lookup(net, saddr, sport, daddr, dport,
-				dif, &udp_table, NULL);
+				dif, 0, &udp_table, NULL);
 	if (sk && !refcount_inc_not_zero(&sk->sk_refcnt))
 		sk = NULL;
 	return sk;
@@ -501,7 +505,7 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 	struct net *net = dev_net(skb->dev);
 
 	sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source,
-			       inet6_iif(skb), udptable, skb);
+			       inet6_iif(skb), 0, udptable, skb);
 	if (!sk) {
 		__ICMP6_INC_STATS(net, __in6_dev_get(skb->dev),
 				  ICMP6_MIB_INERRORS);
