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[Bug libc/3087] Memory leak in allocate_dtv (in /lib/ld-2.3.5.so), SuSE Linux 10.0
- From: "mv at binarysec dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 18 Aug 2006 15:16:57 -0000
- Subject: [Bug libc/3087] Memory leak in allocate_dtv (in /lib/ld-2.3.5.so), SuSE Linux 10.0
- References: <20060818105543.3087.chollstein@teracortex.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mv at binarysec dot com 2006-08-18 15:16 -------
Subject: Re: Memory leak in allocate_dtv (in /lib/ld-2.3.5.so), SuSE Linux 10.0
> Thank you very much for your fast answer!
Your welcome :d
> Do you know about a solution for this?
I haven't got time to look at the problem perhaps Drepper can help us else I
would look at this maybe this evening or tomorrow.
> Christian
Michael Vergoz
>>------- Additional Comments From mv at binarysec dot com 2006-08-18 14:02
>>-------
>>Subject: Re: New: Memory leak in allocate_dtv (in /lib/ld-2.3.5.so), SuSE
>>Linux 10.0
>>
>>Hi,
>>
>>I confirmed this memory leak under Linux Debian libc 2.3.2 (it's an old
>>leak).
>>
>>Regards,
>>Michael Vergoz
>>
>>----- Original Message -----
>>From: "chollstein at teracortex dot com"
>><sourceware-bugzilla@sourceware.org>
>>To: <glibc-bugs@sources.redhat.com>
>>Sent: Friday, August 18, 2006 12:55 PM
>>Subject: [Bug libc/3087] New: Memory leak in allocate_dtv (in
>>/lib/ld-2.3.5.so), SuSE Linux 10.0
>>
>>
>>> Found with valgrind in glibc 2.3.5, but on the internet it is also
>>> reported for
>>> glibc 2.4. After a pthread_create and pthread_join valgrind reports a
>>> memory
>>> leak. I could not find a definite answer, if this is an error or not.
>>> The
>>> number
>>> of reported leaks grows in server applications, where with each request
>>> a
>>> new
>>> handler thread is created.
>>>
>>>
>>>
>>> Valgrind output:
>>> ==5599== Memcheck, a memory error detector.
>>> ==5599== Copyright (C) 2002-2006, and GNU GPL'd, by Julian Seward et al.
>>> ==5599== Using LibVEX rev 1606, a library for dynamic binary
>>> translation.
>>> ==5599== Copyright (C) 2004-2006, and GNU GPL'd, by OpenWorks LLP.
>>> ==5599== Using valgrind-3.2.0, a dynamic binary instrumentation
>>> framework.
>>> ==5599== Copyright (C) 2000-2006, and GNU GPL'd, by Julian Seward et al.
>>> ==5599== For more details, rerun with: -v
>>> ==5599==
>>> ==5599==
>>> ==5599== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 15 from 1)
>>> ==5599== malloc/free: in use at exit: 68 bytes in 1 blocks.
>>> ==5599== malloc/free: 1 allocs, 0 frees, 68 bytes allocated.
>>> ==5599== For counts of detected errors, rerun with: -v
>>> ==5599== searching for pointers to 1 not-freed blocks.
>>> ==5599== checked 2,171,312 bytes.
>>> ==5599==
>>> ==5599== 68 bytes in 1 blocks are possibly lost in loss record 1 of 1
>>> ==5599== at 0x401C894: calloc (vg_replace_malloc.c:279)
>>> ==5599== by 0x400DCC8: allocate_dtv (in /lib/ld-2.3.5.so)
>>> ==5599== by 0x400DF3B: _dl_allocate_tls (in /lib/ld-2.3.5.so)
>>> ==5599== by 0x40388E4: pthread_create@@GLIBC_2.1 (in
>>> /lib/tls/libpthread-2.3.5.so)
>>> ==5599== by 0x804849F: main (in /home/holle/src/a.out)
>>> ==5599==
>>> ==5599== LEAK SUMMARY:
>>> ==5599== definitely lost: 0 bytes in 0 blocks.
>>> ==5599== possibly lost: 68 bytes in 1 blocks.
>>> ==5599== still reachable: 0 bytes in 0 blocks.
>>> ==5599== suppressed: 0 bytes in 0 blocks.
>>>
>>>
>>> Test program compiled under Linux SuSE 10.0 with
>>>
>>> gcc test.c -lpthread
>>>
>>> valgrind --tool=memcheck --leak-check=yes --num-callers=12
>>> --freelist-vol=100000000 --show-reachable=yes ./a.out
>>>
>>>
>>>
>>> Test program:
>>>
>>>
>>>
>>> #include <pthread.h>
>>>
>>> static void *func(void *param)
>>> {
>>> return NULL;
>>> }
>>>
>>>
>>> int main(int argc, char **argv)
>>> {
>>> pthread_t handle;
>>>
>>> pthread_create(&handle, NULL, func, NULL);
>>> pthread_join(handle, NULL);
>>>
>>> return 0;
>>> }
>>>
>>> --
>>> Summary: Memory leak in allocate_dtv (in /lib/ld-2.3.5.so),
>>> SuSE
>>> Linux 10.0
>>> Product: glibc
>>> Version: 2.4
>>> Status: NEW
>>> Severity: normal
>>> Priority: P1
>>> Component: libc
>>> AssignedTo: drepper at redhat dot com
>>> ReportedBy: chollstein at teracortex dot com
>>> CC: glibc-bugs at sources dot redhat dot com
>>>
>>>
>>> http://sourceware.org/bugzilla/show_bug.cgi?id=3087
>>>
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>>>
>>
>>
>>
>>--
>>
>>
>>http://sourceware.org/bugzilla/show_bug.cgi?id=3087
>>
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