[src/trunk]: src/sys/net don't free mbuf twice.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/74e1a5bb1710
branches:  trunk
changeset: 342332:74e1a5bb1710
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Dec 16 23:14:42 2015 +0000

description:
don't free mbuf twice.
XXX: pullup 7.

diffstat:

 sys/net/bpf.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (28 lines):

diff -r 6ea50fa6db60 -r 74e1a5bb1710 sys/net/bpf.c
--- a/sys/net/bpf.c     Wed Dec 16 23:00:39 2015 +0000
+++ b/sys/net/bpf.c     Wed Dec 16 23:14:42 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bpf.c,v 1.192 2015/10/14 19:40:09 christos Exp $       */
+/*     $NetBSD: bpf.c,v 1.193 2015/12/16 23:14:42 christos Exp $       */
 
 /*
  * Copyright (c) 1990, 1991, 1993
@@ -39,7 +39,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bpf.c,v 1.192 2015/10/14 19:40:09 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bpf.c,v 1.193 2015/12/16 23:14:42 christos Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_bpf.h"
@@ -721,7 +721,8 @@
        if (mc != NULL) {
                if (error == 0)
                        (*ifp->if_input)(ifp, mc);
-               m_freem(mc);
+               else
+                       m_freem(mc);
        }
        splx(s);
        KERNEL_UNLOCK_ONE(NULL);