diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 915b210c4512..e8f7d3b573d0 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -2089,7 +2089,8 @@ static void ip_mr_forward(struct net *net, struct mr_table *mrt,
 	}
 
 	/* Wrong interface: drop packet and (maybe) send PIM assert. */
-	if (rcu_access_pointer(mrt->vif_table[vif].dev) != dev) {
+	if (true_vifi < 0 ||
+	    rcu_access_pointer(mrt->vif_table[vif].dev) != dev) {
 		if (rt_is_output_route(skb_rtable(skb))) {
 			/* It is our own packet, looped back.
 			 * Very complicated situation...
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index a628acf50b0d..af968a2c2a78 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -2225,7 +2225,8 @@ static void ip6_mr_forward(struct net *net, struct mr_table *mrt,
 	/*
 	 * Wrong interface: drop packet and (maybe) send PIM assert.
 	 */
-	if (rcu_access_pointer(mrt->vif_table[vif].dev) != dev) {
+	if (true_vifi < 0 ||
+	    rcu_access_pointer(mrt->vif_table[vif].dev) != dev) {
 		atomic_long_inc(&c->_c.mfc_un.res.wrong_if);
 
 		if (true_vifi >= 0 && READ_ONCE(mrt->mroute_do_assert) &&