D33269.diff
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	Index: sys/net/if_epair.c
	===================================================================
	--- sys/net/if_epair.c
	+++ sys/net/if_epair.c
	@@ -131,7 +131,10 @@
	m = buf_ring_dequeue_sc(sc->rxring[ridx]);
	if (m == NULL)
	break;
	-
	+ if (__predict_false(m_rcvif_restore(m) == NULL)) {
	+ m_freem(m);
	+ continue;
	+ }
	MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
	(*ifp->if_input)(ifp, m);

	@@ -193,6 +196,7 @@
	M_ASSERTPKTHDR(m);
	epair_clear_mbuf(m);
	if_setrcvif(m, oifp);
	+ m_rcvif_serialize(m);
	M_SETFIB(m, oifp->if_fib);

	/* Save values as once the mbuf is queued, it's not ours anymore. */