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From: Sergey Vlasov <vsu@altlinux.ru>
To: devel@lists.altlinux.org
Subject: Re: [devel] mtools-4.0.10-alt1: Sisyphus/i586 test rebuild failed
Date: Mon, 20 Jul 2009 15:42:11 +0400
Message-ID: <20090720114211.GA16786@newmaster.mivlgu.local> (raw)
In-Reply-To: <20090720105828.GA16178@osdn.org.ua>

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On Mon, Jul 20, 2009 at 01:58:28PM +0300, Michael Shigorin wrote:
> On Mon, Jul 20, 2009 at 01:05:03PM +0300, I wrote:
> > On Mon, Jul 20, 2009 at 01:56:59PM +0400, QA Team Robot wrote:
> > > Package: mtools-4.0.10-alt1
> > > Status: Sisyphus/i586 test rebuild failed
> > Приму помощь в исправлении mtools (берусь отнести патч апстриму),
> > иначе пакет естественным образом останется без майнтейнера.
> 
> Ладно, костыль я туда положил.  А теперь объясните мне кто-нить
> понимающий, почему исходный патч-то не проконал?  Он логичней.
> 
> > > In file included from /usr/include/string.h:658,
> > >                  from sysincludes.h:264,
> > >                  from mlabel.c:22:
> > > In function 'strcpy',
> > >     inlined from 'label_name' at mlabel.c:38:
> > > /usr/include/bits/string3.h:106: error: call to __builtin___strcpy_chk will always overflow destination buffer
> > > make: Leaving directory `/usr/src/RPM/BUILD/mtools-4.0.10'
> > > make: *** [mlabel.o] Error 1
> > 
> 
> -- 
>  ---- WBR, Michael Shigorin <mike@altlinux.ru>
>   ------ Linux.Kiev http://www.linux.kiev.ua/

> diff -Naur mtools-4.0.10-orig/file_name.h mtools-4.0.10/file_name.h
> --- mtools-4.0.10-orig/file_name.h	2009-02-19 22:41:14 +0200
> +++ mtools-4.0.10/file_name.h	2009-07-20 13:42:26 +0300
> @@ -26,8 +26,8 @@
>   * MYFILE  TXT
>   */
>  struct dos_name_t {
> -  char base[8];
> -  char ext[3];
> +  char base[9];
> +  char ext[4];

Такой "костыль" всё сломает - эта структура должна соответствовать
формату хранения имени файла в файловой системе FAT.

>    char sentinel;
>  };
>  
> diff -Naur mtools-4.0.10-orig/mlabel.c mtools-4.0.10/mlabel.c
> --- mtools-4.0.10-orig/mlabel.c	2009-03-03 08:10:11 +0200
> +++ mtools-4.0.10/mlabel.c	2009-07-20 13:34:02 +0300
> @@ -35,7 +35,8 @@
>  	int have_lower, have_upper;
>  	wchar_t wbuffer[12];
>  
> -	strcpy(ans->base,"           ");
> +	strcpy(ans->base,"        ");
> +	strcpy(ans->ext,"   ");
>  	len = native_to_wchar(filename, wbuffer, 11, 0, 0);
>  	if(len > 11){
>  		*mangled = 1;

> diff -Naur mtools-4.0.10-orig/mlabel.c mtools-4.0.10/mlabel.c
> --- mtools-4.0.10-orig/mlabel.c	2009-03-03 08:10:11 +0200
> +++ mtools-4.0.10/mlabel.c	2009-07-20 13:34:02 +0300
> @@ -35,7 +35,8 @@
>  	int have_lower, have_upper;
>  	wchar_t wbuffer[12];
>  
> -	strcpy(ans->base,"           ");
> +	strcpy(ans->base,"        ");
> +	strcpy(ans->ext,"   ");

Завершающий \0 всё равно не лезет в буфер.

Можно попробовать так (для memcpy проверки не выполняются):

--- mtools-4.0.10/mlabel.c.orig	2009-07-20 15:36:44 +0400
+++ mtools-4.0.10/mlabel.c	2009-07-20 15:36:48 +0400
@@ -35,7 +35,7 @@ void label_name(doscp_t *cp, const char 
 	int have_lower, have_upper;
 	wchar_t wbuffer[12];
 
-	strcpy(ans->base,"           ");
+	memcpy(ans->base, "           ", 12);
 	len = native_to_wchar(filename, wbuffer, 11, 0, 0);
 	if(len > 11){
 		*mangled = 1;

Или более понятным образом:

--- mtools-4.0.10/mlabel.c.orig	2009-07-20 15:36:44 +0400
+++ mtools-4.0.10/mlabel.c	2009-07-20 15:40:28 +0400
@@ -35,7 +35,10 @@ void label_name(doscp_t *cp, const char 
 	int have_lower, have_upper;
 	wchar_t wbuffer[12];
 
-	strcpy(ans->base,"           ");
+	memset(ans->base, ' ', sizeof ans->base);
+	memset(ans->ext, ' ', sizeof ans->ext);
+	ans->sentinel = '\0';
+
 	len = native_to_wchar(filename, wbuffer, 11, 0, 0);
 	if(len > 11){
 		*mangled = 1;


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  reply	other threads:[~2009-07-20 11:42 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-20 10:05 ` Michael Shigorin
2009-07-20 10:58   ` Michael Shigorin
2009-07-20 11:42     ` Sergey Vlasov [this message]
2009-07-20 12:14       ` Michael Shigorin

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