From 7493cc345aceefdf3a4356705a9994b3e1472598 Mon Sep 17 00:00:00 2001
From: Jung-uk Kim <jkim@FreeBSD.org>
Date: Mon, 5 Apr 2010 17:32:49 +0000
Subject: [PATCH] MFC:	r205858

Check the pointer to JIT binary filter before its de-allocation.
---
 sys/net/bpf.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sys/net/bpf.c b/sys/net/bpf.c
index fcac33d44dc..0d34e1f157a 100644
--- a/sys/net/bpf.c
+++ b/sys/net/bpf.c
@@ -1865,13 +1865,14 @@ bpf_freed(struct bpf_d *d)
 	 * free.
 	 */
 	bpf_free(d);
-	if (d->bd_rfilter) {
+	if (d->bd_rfilter != NULL) {
 		free((caddr_t)d->bd_rfilter, M_BPF);
 #ifdef BPF_JITTER
-		bpf_destroy_jit_filter(d->bd_bfilter);
+		if (d->bd_bfilter != NULL)
+			bpf_destroy_jit_filter(d->bd_bfilter);
 #endif
 	}
-	if (d->bd_wfilter)
+	if (d->bd_wfilter != NULL)
 		free((caddr_t)d->bd_wfilter, M_BPF);
 	mtx_destroy(&d->bd_mtx);
 }