D15083.diff
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	Index: head/sys/net/bpf.c
	===================================================================
	--- head/sys/net/bpf.c
	+++ head/sys/net/bpf.c
	@@ -98,6 +98,10 @@

	MALLOC_DEFINE(M_BPF, "BPF", "BPF data");

	+static struct bpf_if_ext dead_bpf_if = {
	+ .bif_dlist = LIST_HEAD_INITIALIZER()
	+};
	+
	struct bpf_if {
	#define bif_next bif_ext.bif_next
	#define bif_dlist bif_ext.bif_dlist
	@@ -2659,7 +2663,7 @@
	*/
	BPFIF_WLOCK(bp);
	bp->bif_flags \|= BPFIF_FLAG_DYING;
	- *bp->bif_bpf = NULL;
	+ bp->bif_bpf = (struct bpf_if )&dead_bpf_if;;
	BPFIF_WUNLOCK(bp);

	CTR4(KTR_NET, "%s: sheduling free for encap %d (%p) for if %p",