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avoid out-of-bound memory access if len == 128. 

from Ted Unangst via Colin Percival
This commit is contained in:
itojun 2004-02-23 05:01:04 +00:00
parent 985db8fe7c
commit aaa4bd9a6c
1 changed files with 4 additions and 3 deletions
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7
sys/netinet6/in6.c
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@ -1,4 +1,4 @@
/* $NetBSD: in6.c,v 1.84 2003/12/10 11:46:33 itojun Exp $ */
/* $NetBSD: in6.c,v 1.85 2004/02/23 05:01:04 itojun Exp $ */
/* $KAME: in6.c,v 1.198 2001/07/18 09:12:38 itojun Exp $ */
/*
@ -62,7 +62,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.84 2003/12/10 11:46:33 itojun Exp $");
__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.85 2004/02/23 05:01:04 itojun Exp $");
#include "opt_inet.h"
@ -2238,7 +2238,8 @@ in6_are_prefix_equal(p1, p2, len)
if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
return (0);
if (p1->s6_addr[bytelen] >> (8 - bitlen) !=
if (bitlen != 0 &&
p1->s6_addr[bytelen] >> (8 - bitlen) !=
p2->s6_addr[bytelen] >> (8 - bitlen))
return (0);