Index: uipc_mbuf.c
===================================================================
RCS file: /cvs/src/sys/kern/uipc_mbuf.c,v
retrieving revision 1.222
diff -u -p -r1.222 uipc_mbuf.c
--- uipc_mbuf.c	6 Apr 2016 01:36:06 -0000	1.222
+++ uipc_mbuf.c	6 Apr 2016 07:29:32 -0000
@@ -1217,7 +1198,7 @@ m_dup_pkthdr(struct mbuf *to, struct mbu
 	to->m_pkthdr = from->m_pkthdr;
 
 #if NPF > 0
-	pf_pkt_state_key_ref(to);
+	to->m_pkthdr.pf.statekey = NULL;
 #endif	/* NPF > 0 */
 
 	SLIST_INIT(&to->m_pkthdr.ph_tags);