[src/trunk]: src/sys/net clear the packet filter's scratch memory before runn...

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

details:   https://anonhg.NetBSD.org/src/rev/034026349f66
branches:  trunk
changeset: 767282:034026349f66
user:      drochner <drochner%NetBSD.org@localhost>
date:      Thu Jul 14 10:43:55 2011 +0000

description:
clear the packet filter's scratch memory before running the filter
program, otherwise kernel memory can be leaked, from Guy Harris
per PR kern/45142

diffstat:

 sys/net/bpf_filter.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r d951227b0dac -r 034026349f66 sys/net/bpf_filter.c
--- a/sys/net/bpf_filter.c      Thu Jul 14 10:27:36 2011 +0000
+++ b/sys/net/bpf_filter.c      Thu Jul 14 10:43:55 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bpf_filter.c,v 1.46 2011/02/19 17:21:48 christos Exp $ */
+/*     $NetBSD: bpf_filter.c,v 1.47 2011/07/14 10:43:55 drochner Exp $ */
 
 /*-
  * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bpf_filter.c,v 1.46 2011/02/19 17:21:48 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bpf_filter.c,v 1.47 2011/07/14 10:43:55 drochner Exp $");
 
 #if 0
 #if !(defined(lint) || defined(KERNEL))
@@ -148,6 +148,7 @@
                return (u_int)-1;
        A = 0;
        X = 0;
+       memset(mem, 0, sizeof(mem));
        --pc;
        for (;;) {
                ++pc;