[src/trunk]: src/lib/libc/locale avoid mbrtowc/wcrtomb buffer overrun when CP...

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

details:   https://anonhg.NetBSD.org/src/rev/27437f6c323a
branches:  trunk
changeset: 753431:27437f6c323a
user:      tnozaki <tnozaki%NetBSD.org@localhost>
date:      Sun Mar 28 14:05:09 2010 +0000

description:
avoid mbrtowc/wcrtomb buffer overrun when CPUARCH=hppa and MB_CUR_MAX > 6.
it is not usual case(merely used such mutibyte locale, eg. ja_JP.ISO-2022-JP).

[background]
before merging minoura-xpg4dl branch(2001), we argued and decided to increase
MB_LEN_MAX 1 -> 32 all CPUARCH(*but* we forgot to change it MD to MI).

without knowing that NetBSD/hp700(mergeing -current 2002) incorrectly set
MB_LEN_MAX=6 (maybe this value taken from FreeBSD). but our setlocale(3)
assumes __mb_len_max_runtime as 32, so that mbrtowc/wcrtomb may overrun.

we have to increase hppa's MB_LEN_MAX upto 32, and change it MD to MI
next libc major bump(scheduled next release 6.0).

diffstat:

 lib/libc/locale/setlocale32.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (26 lines):

diff -r b771435e1234 -r 27437f6c323a lib/libc/locale/setlocale32.c
--- a/lib/libc/locale/setlocale32.c     Sun Mar 28 13:11:23 2010 +0000
+++ b/lib/libc/locale/setlocale32.c     Sun Mar 28 14:05:09 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: setlocale32.c,v 1.2 2003/03/11 17:23:07 tshiozak Exp $ */
+/*     $NetBSD: setlocale32.c,v 1.3 2010/03/28 14:05:09 tnozaki Exp $  */
 
 /*-
  * Copyright (c)1999 Citrus Project,
@@ -28,7 +28,7 @@
 
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: setlocale32.c,v 1.2 2003/03/11 17:23:07 tshiozak Exp $");
+__RCSID("$NetBSD: setlocale32.c,v 1.3 2010/03/28 14:05:09 tnozaki Exp $");
 #endif /* LIBC_SCCS and not lint */
 
 #include "namespace.h"
@@ -44,6 +44,6 @@
 
        /* locale may be NULL */
 
-       __mb_len_max_runtime = 32;
+       __mb_len_max_runtime = MB_LEN_MAX;
        return __setlocale(category, locale);
 }