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clear the packet filter's scratch memory before running the filter

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program, otherwise kernel memory can be leaked, from Guy Harris
per PR kern/45142
This commit is contained in:
drochner 2011-07-14 10:43:55 +00:00
parent 418b5c73fe
commit d5aac921d3
1 changed files with 3 additions and 2 deletions
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5
sys/net/bpf_filter.c
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@ -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 @@ bpf_filter(const struct bpf_insn *pc, const u_char *p, u_int wirelen,
return (u_int)-1;
A = 0;
X = 0;
memset(mem, 0, sizeof(mem));
--pc;
for (;;) {
++pc;