[src/trunk]: src/usr.bin/mkdep Don't touch before the mmap'ed region.

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

details:   https://anonhg.NetBSD.org/src/rev/6af80edb6346
branches:  trunk
changeset: 765578:6af80edb6346
user:      enami <enami%NetBSD.org@localhost>
date:      Tue May 31 02:34:32 2011 +0000

description:
Don't touch before the mmap'ed region.

diffstat:

 usr.bin/mkdep/mkdep.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 6bb07da89318 -r 6af80edb6346 usr.bin/mkdep/mkdep.c
--- a/usr.bin/mkdep/mkdep.c     Tue May 31 00:15:28 2011 +0000
+++ b/usr.bin/mkdep/mkdep.c     Tue May 31 02:34:32 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: mkdep.c,v 1.37 2011/05/30 22:52:12 christos Exp $ */
+/* $NetBSD: mkdep.c,v 1.38 2011/05/31 02:34:32 enami Exp $ */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -37,7 +37,7 @@
 #if !defined(lint)
 __COPYRIGHT("@(#) Copyright (c) 1999 The NetBSD Foundation, Inc.\
  All rights reserved.");
-__RCSID("$NetBSD: mkdep.c,v 1.37 2011/05/30 22:52:12 christos Exp $");
+__RCSID("$NetBSD: mkdep.c,v 1.38 2011/05/31 02:34:32 enami Exp $");
 #endif /* not lint */
 
 #include <sys/mman.h>
@@ -379,7 +379,7 @@
                                /* Then look for any valid suffix */
                                for (sl = suff_list; sl != NULL;
                                    sl = sl->next) {
-                                       if (sl->len &&
+                                       if (sl->len && buf <= suf - sl->len &&
                                            !memcmp(suf - sl->len, sl->suff,
                                                    sl->len))
                                                break;