--- sys/netinet/ip_input.c.orig	2017-06-17 17:48:27.329463000 +0700
+++ sys/netinet/ip_input.c	2017-06-17 18:17:47.363190000 +0700
@@ -446,6 +446,7 @@
 void
 ip_input(struct mbuf *m)
 {
+	struct rm_priotracker in_ifa_tracker;
 	struct ip *ip = NULL;
 	struct in_ifaddr *ia = NULL;
 	struct ifaddr *ifa;
@@ -677,7 +678,7 @@
 	/*
 	 * Check for exact addresses in the hash bucket.
 	 */
-	/* IN_IFADDR_RLOCK(); */
+	IN_IFADDR_RLOCK(&in_ifa_tracker);
 	LIST_FOREACH(ia, INADDR_HASH(ip->ip_dst.s_addr), ia_hash) {
 		/*
 		 * If the address matches, verify that the packet
@@ -689,11 +690,11 @@
 			counter_u64_add(ia->ia_ifa.ifa_ipackets, 1);
 			counter_u64_add(ia->ia_ifa.ifa_ibytes,
 			    m->m_pkthdr.len);
-			/* IN_IFADDR_RUNLOCK(); */
+			IN_IFADDR_RUNLOCK(&in_ifa_tracker);
 			goto ours;
 		}
 	}
-	/* IN_IFADDR_RUNLOCK(); */
+	IN_IFADDR_RUNLOCK(&in_ifa_tracker);
 
 	/*
 	 * Check for broadcast addresses.