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Bug#422598: marked as done (libc6: Segmentation fault in printf()/vfprintf()/strlen())

Your message dated Mon, 07 May 2007 14:45:34 +0200
with message-id <463F1F6E.9000308@aurel32.net>
and subject line Bug#422598: libc6: Segmentation fault in printf()/vfprintf()/strlen()
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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Debian bug tracking system administrator
(administrator, Debian Bugs database)
--- Begin Message --- 
Package: libc6
Version: 2.5-6
Severity: normal

Hi,

there happens a segmentation fault with the following code:

	#include <stdio.h>

	int main(int argc, char**argv)
	{
		printf("%s\n", strerror(atoi(argv[1])));
	}

I have observed this on amd64 libc6 2.5-5 and 2.5-6,
it does not occur on i386 libc6 2.5-5.

The amd64 system is actually an amd64 schroot running on a sarge/i386
host.

If there is anything I can do to help you debug this, please let me
know. A small test log is appended below.

Andreas

$ vi strerror.c
$ gcc -g -o strerror strerror.c
$ ./strerror 0 ; echo $?
Segmentation fault
139
$ gdb ./strerror
GNU gdb 6.6-debian
....
This GDB was configured as "x86_64-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) set args 0
(gdb) run
Starting program: /home/beckmann/strerror 0

Program received signal SIGSEGV, Segmentation fault.
0x00002ad8f39eeab0 in strlen () from /lib/libc.so.6
(gdb) bt full
#0  0x00002ad8f39eeab0 in strlen () from /lib/libc.so.6
No symbol table info available.
#1  0x00002ad8f39beb15 in vfprintf () from /lib/libc.so.6
No symbol table info available.
#2  0x00002ad8f39c4a6a in printf () from /lib/libc.so.6
No symbol table info available.
#3  0x0000000000400549 in main (argc=2, argv=0x7fffff9b5838) at
strerror.c:5
No locals.

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (30, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.16.29.2.em64t-smp (SMP w/16 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash

-- no debconf information

--- End Message ---
--- Begin Message --- 
Andreas Beckmann a écrit :
> Package: libc6
> Version: 2.5-6
> Severity: normal
> 
> Hi,
> 
> there happens a segmentation fault with the following code:
> 
> 	#include <stdio.h>
> 
> 	int main(int argc, char**argv)
> 	{
> 		printf("%s\n", strerror(atoi(argv[1])));
> 	}
> 
> I have observed this on amd64 libc6 2.5-5 and 2.5-6,
> it does not occur on i386 libc6 2.5-5.
> 
> The amd64 system is actually an amd64 schroot running on a sarge/i386
> host.
> 
> If there is anything I can do to help you debug this, please let me
> know. A small test log is appended below.
> 

You are missing a #include <string.h>. And don't forget to always build
with -Wall.

-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net

--- End Message ---
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