[src/trunk]: src/sys/net Check "preinited" argument of bpf_set_extmem().

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

details:   https://anonhg.NetBSD.org/src/rev/c772dd4dc030
branches:  trunk
changeset: 796915:c772dd4dc030
user:      alnsn <alnsn%NetBSD.org@localhost>
date:      Wed Jun 25 09:51:34 2014 +0000

description:
Check "preinited" argument of bpf_set_extmem().

diffstat:

 sys/net/bpf_filter.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r adc0809a579d -r c772dd4dc030 sys/net/bpf_filter.c
--- a/sys/net/bpf_filter.c      Wed Jun 25 02:05:58 2014 +0000
+++ b/sys/net/bpf_filter.c      Wed Jun 25 09:51:34 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bpf_filter.c,v 1.64 2014/06/24 22:27:40 rmind Exp $    */
+/*     $NetBSD: bpf_filter.c,v 1.65 2014/06/25 09:51:34 alnsn 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 1.64 2014/06/24 22:27:40 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bpf_filter.c,v 1.65 2014/06/25 09:51:34 alnsn Exp $");
 
 #if 0
 #if !(defined(lint) || defined(KERNEL))
@@ -79,7 +79,7 @@
 int
 bpf_set_extmem(bpf_ctx_t *bc, size_t nwords, bpf_memword_init_t preinited)
 {
-       if (nwords > BPF_MAX_MEMWORDS) {
+       if (nwords > BPF_MAX_MEMWORDS || (preinited >> nwords) != 0) {
                return EINVAL;
        }
        bc->extwords = nwords;