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Bug#364037: marked as done (libc6: memory leak in regcomp)

Your message dated Mon, 5 Feb 2007 23:53:34 +0100
with message-id <20070205225334.GA15698@hades.madism.org>
and subject line tagging 364037
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: 2.3.2.ds1-22sarge3
Severity: important



Hi, i found memory leak in regcomp. 
If regcomp fail due to invalid regular expression containing opening
bracket"(" , 40 bytes are lost.
see example source:


--- tmp.c begins here ---
#include <regex.h>

int
main(int argc, char **argv)
{
        regex_t preg;

        for (;;)
        {
                regcomp(&preg, "(", REG_EXTENDED);
                regfree(&preg);
                //break;
        }

        return 0;
}
--- tmp.c ends here ---


bug exists on sarge i386, whith and without libc6-i686 installed.
Trying this on amd64 testing does not have memory leak.


--- ps output begins here ---
% while : ; do ps -C tmp o rsz,vsz,sz ; sleep 1 ; done
 RSZ   VSZ    SZ
 RSZ   VSZ    SZ
 RSZ   VSZ    SZ
17080 18112 4528
 RSZ   VSZ    SZ
52616 53752 13438
 RSZ   VSZ    SZ
87880 88996 22249
 RSZ   VSZ    SZ
123412 124504 31126
 RSZ   VSZ    SZ
158848 159880 39970
 RSZ   VSZ    SZ
194424 195520 48880
 RSZ   VSZ    SZ
230280 231424 57856
 RSZ   VSZ    SZ
265084 266140 66535
 RSZ   VSZ    SZ
300124 301252 75313
 RSZ   VSZ    SZ
334572 335704 83926
 RSZ   VSZ    SZ
369112 370156 92539
^C
--- ps output ends here ---

--- valgrind output begins here ---
% valgrind --leak-check=full ./tmp
==6295== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 13 from 1)
==6295== malloc/free: in use at exit: 40 bytes in 1 blocks.
==6295== malloc/free: 6 allocs, 5 frees, 436 bytes allocated.
==6295== For counts of detected errors, rerun with: -v
==6295== searching for pointers to 1 not-freed blocks.
==6295== checked 77824 bytes.
==6295==
==6295== 40 bytes in 1 blocks are definitely lost in loss record 1 of 1
==6295==    at 0x1B90459D: malloc (vg_replace_malloc.c:130)
==6295==    by 0x1B9CD57B: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9CAE62: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9CAA3F: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9CA615: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9CA48D: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9CA3AE: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9C8DFC: (within /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x1B9C8A94: regcomp (in /lib/tls/i686/cmov/libc-2.3.2.so)
==6295==    by 0x80483EE: main (tmp.c:10)
==6295==
==6295== LEAK SUMMARY:
==6295==    definitely lost: 40 bytes in 1 blocks.
==6295==      possibly lost: 0 bytes in 0 blocks.
==6295==    still reachable: 0 bytes in 0 blocks.
==6295==         suppressed: 0 bytes in 0 blocks.
==6295== Reachable blocks (those to which a pointer was found) are not shown.
==6295== To see them, rerun with: --show-reachable=yes
%
--- valgrind output ends here ---


Regards,
Jamil Djadala


-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.8-3-686
Locale: LANG=bg_BG, LC_CTYPE=bg_BG (charmap=CP1251)

Versions of packages libc6 depends on:
ii  libdb1-compat                 2.1.3-7    The Berkeley database routines [gl

-- no debconf information

--- End Message ---
--- Begin Message --- 
Version: 2.3.6.ds1-10

On Tue, May 16, 2006 at 10:20:09PM +0200, Aurelien Jarno wrote:
> # Automatically generated email from bts, devscripts version 2.9.19
> tags 364037 + sarge

-- 
·O·  Pierre Habouzit
··O                                                madcoder@debian.org
OOO                                                http://www.madism.org

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