Public bug reported:
Hi all. I'm using kxstudio, but libc6 packages are taken from ubuntu.
Where to find info about "argz" functions family: in argz manual (man argz).
Try this example:
/******************************************************************/
#include <argz.h>
#include <stdio.h>
/* "argz" parameter, which is command line with arguments,
* separated by NULL characters, can be found in /proc/[PID]/cmdline file for
any PID */
char * cmdline;
char * cmdline_size;
get_process_cmdline( &cmdline, &cmdline_size ); // User-defined function
int argc = argz_count( cmdline, cmdline_size ); // All right...
char ** argv = malloc( argc + 1);
if (argc) printf ( "arg0: %s", argv[0] ); // Success
if (argc > 0) printf ( "arg1: %s", argv[1] ); // Success
free( * argv ); /* Without effect - argv[0] and argv[1] are still reachable */
free( argv ); /* segmentation fault! =) */
/*************************************************/
Below is output of program, using argz functionality:
======================================================================
*** glibc detected *** gladish: free(): invalid next size (fast):
0x0000000002310460 ***
======= Backtrace: =========
/lib/libc.so.6(+0x775b6)[0x7f5e94f255b6]
/lib/libc.so.6(cfree+0x73)[0x7f5e94f2be53]
gladish[0x42c989]
gladish[0x41b763]
gladish[0x41b9b3]
gladish[0x41bb13]
gladish[0x41be5a]
gladish[0x41b5c1]
gladish[0x41bff7]
gladish[0x40fd65]
/lib/libglib-2.0.so.0(+0x3f09b)[0x7f5e998db09b]
/lib/libglib-2.0.so.0(g_main_context_dispatch+0x1f2)[0x7f5e998da8c2]
/lib/libglib-2.0.so.0(+0x42748)[0x7f5e998de748]
/lib/libglib-2.0.so.0(g_main_loop_run+0x195)[0x7f5e998dec55]
/usr/lib/libgtk-x11-2.0.so.0(gtk_main+0xa7)[0x7f5e9747abb7]
gladish[0x410072]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7f5e94eccc4d]
gladish[0x40fbd9]
======= Memory map: ========
00400000-00440000 r-xp 00000000 08:04 785500
/usr/bin/gladish
0063f000-00640000 r--p 0003f000 08:04 785500
/usr/bin/gladish
00640000-00642000 rw-p 00040000 08:04 785500
/usr/bin/gladish
00642000-00644000 rw-p 00000000 00:00 0
02044000-023d9000 rw-p 00000000 00:00 0 [heap]
7f5e88000000-7f5e88021000 rw-p 00000000 00:00 0
7f5e88021000-7f5e8c000000 ---p 00000000 00:00 0
7f5e8c9be000-7f5e8ca1e000 rw-s 00000000 00:04 209223742
/SYSV00000000 (deleted)
7f5e8cafc000-7f5e8cbd6000 r-xp 00000000 08:04 796199
/usr/lib/libasound.so.2.0.0
7f5e8cbd6000-7f5e8cdd6000 ---p 000da000 08:04 796199
/usr/lib/libasound.so.2.0.0
7f5e8cdd6000-7f5e8cddc000 r--p 000da000 08:04 796199
/usr/lib/libasound.so.2.0.0
7f5e8cddc000-7f5e8cddd000 rw-p 000e0000 08:04 796199
/usr/lib/libasound.so.2.0.0
7f5e8ce11000-7f5e8ce15000 r-xp 00000000 08:04 799982
/usr/lib/libcanberra-0.22/libcanberra-alsa.so
7f5e8ce15000-7f5e8d014000 ---p 00004000 08:04 799982
/usr/lib/libcanberra-0.22/libcanberra-alsa.so
7f5e8d014000-7f5e8d015000 r--p 00003000 08:04 799982
/usr/lib/libcanberra-0.22/libcanberra-alsa.so
7f5e8d015000-7f5e8d016000 rw-p 00004000 08:04 799982
/usr/lib/libcanberra-0.22/libcanberra-alsa.so
7f5e8d016000-7f5e8d076000 rw-s 00000000 00:04 209190932
/SYSV00000000 (deleted)
7f5e8d076000-7f5e8d6bd000 r--p 00000000 08:04 1068210
/usr/share/icons/gnome/icon-theme.cache
7f5e8d6bd000-7f5e8e462000 r--p 00000000 08:04 1046777
/usr/share/icons/hicolor/icon-theme.cache
7f5e8e462000-7f5e8e4fa000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e4fa000-7f5e8e592000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e592000-7f5e8e62a000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e62a000-7f5e8e6c2000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e6c2000-7f5e8e75a000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e75a000-7f5e8e7f2000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e7f2000-7f5e8e88a000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e88a000-7f5e8e922000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e922000-7f5e8e9ba000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8e9ba000-7f5e8ea52000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8ea52000-7f5e8ea57000 r-xp 00000000 08:04 949601
/usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7f5e8ea57000-7f5e8ec56000 ---p 00005000 08:04 949601
/usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7f5e8ec56000-7f5e8ec57000 r--p 00004000 08:04 949601
/usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7f5e8ec57000-7f5e8ec58000 rw-p 00005000 08:04 949601
/usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7f5e8ec58000-7f5e8ecf0000 r--p 00000000 08:04 1058979
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7f5e8ecf0000-7f5e8ecf2000 r-xp 00000000 08:04 920845
/usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7f5e8ecf2000-7f5e8eef1000 ---p 00002000 08:04 920845
/usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7f5e8eef1000-7f5e8eef2000 r--p 00001000 08:04 920845
/usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7f5e8eef2000-7f5e8eef3000 rw-p 00002000 08:04 920845
/usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7f5e8eef3000-7f5e8eef4000 r--s 00000000 08:04 261548
/var/cache/fontconfig/26de28bc8622bbc1fb67fd234c21975f-le64.cache-3
7f5e8eef4000-7f5e8eef8000 r--s 00000000 08:04 290208
/var/cache/fontconfig/5e10083637a12ecd1bff191eb66bfa2f-le64.cache-3
7f5e8eef8000-7f5e8eef9000 r--s 00000000 08:04 290154
/var/cache/fontconfig/c05880de57d1f5e948fdfacc138775d9-le64.cache-3
7f5e8eef9000-7f5e8eefd000 r--s 00000000 08:04 289702
/var/cache/fontconfig/603b2eb47209ddb3c5269b217a306167-le64.cache-3
7f5e8eefd000-7f5e8ef06000 r--s 00000000 08:04 261586
/var/cache/fontconfig/945677eb7aeaf62f1d50efc3fb3ec7d8-le64.cache-3
7f5e8ef06000-7f5e8ef08000 r--s 00000000 08:04 289695
/var/cache/fontconfig/99e8ed0e538f840c565b6ed5dad60d56-le64.cache-3
7f5e8ef08000-7f5e8ef0e000 r--s 00000000 08:04 289688
/var/cache/fontconfig/e25ca923d7a08ab6b0777bd7eb77ea77-le64.cache-3
7f5e8ef0e000-7f5e8ef0f000 r--s 00000000 08:04 289683
/var/cache/fontconfig/0fafd173547752dce4dee1a69e0b3c95-le64.cache-3
7f5e8ef0f000-7f5e8ef12000 r--s 00000000 08:04 289673
/var/cache/fontconfig/e383d7ea5fbe662a33d9b44caf393297-le64.cache-3
7f5e8ef12000-7f5e8ef15000 r--s 00000000 08:04 287309
/var/cache/fontconfig/2cd17615ca594fa2959ae173292e504c-le64.cache-3
7f5e8ef15000-7f5e8ef1c000 r--s 00000000 08:04 287147
/var/cache/fontconfig/bddabcf04192498a6a74911686fc6962-le64.cache-3
7f5e8ef1c000-7f5e8ef20000 r--s 00000000 08:04 287145
/var/cache/fontconfig/a46337af8a0b4c9b317ad981ec3bdf87-le64.cache-3
7f5e8ef20000-7f5e8ef21000 r--s 00000000 08:04 287144
/var/cache/fontconfig/79b7902a698c37d747b157374a08587f-le64.cache-3
7f5e8ef21000-7f5e8ef23000 r--s 00000000 08:04 287141
/var/cache/fontconfig/1b70ff56935fd37e75520e134628df26-le64.cache-3
7f5e8ef23000-7f5e8ef2a000 r--s 00000000 08:04 287140
/var/cache/fontconfig/3fdcac6013931cd7c06449c5f8fab136-le64.cache-3
7f5e8ef2a000-7f5e8ef2b000 r--s 00000000 08:04 287137
/var/cache/fontconfig/6edd069ccec3ba28096b368c434fa861-le64.cache-3
7f5e8ef2b000-7f5e8ef2e000 r--s 00000000 08:04 287136
/var/cache/fontconfig/ea47318ec9849e1a71e80a5d69d13859-le64.cache-3
7f5e8ef2e000-7f5e8ef30000 r--s 00000000 08:04 287134
/var/cache/fontconfig/e3fa16a14183b06aa45b3e009278fd14-le64.cache-3
7f5e8ef30000-7f5e8ef31000 r--s 00000000 08:04 287133
/var/cache/fontconfig/fc14e3aff40829fbb7132d5e06a8168b-le64.cache-3
7f5e8ef31000-7f5e8ef33000 r--s 00000000 08:04 287132
/var/cache/fontconfig/dc69028cb7d26f67d8024a5e4f94b512-le64.cache-3
7f5e8ef33000-7f5e8ef34000 r--s 00000000 08:04 287127
/var/cache/fontconfig/52728cdc49031813f272d4aa720952ff-le64.cache-3
7f5e8ef34000-7f5e8ef35000 r--s 00000000 08:04 287126
/var/cache/fontconfig/acf24f57989d82ed5c91b60ef9c3a050-le64.cache-3
7f5e8ef35000-7f5e8ef36000 r--s 00000000 08:04 287125
/var/cache/fontconfig/e7071f4a29fa870f4323321c154eba04-le64.cache-3
7f5e8ef36000-7f5e8ef37000 r--s 00000000 08:04 287124
/var/cache/fontconfig/e0853c5e7e7fc9a9e822b52cb2e640cf-le64.cache-3
7f5e8ef37000-7f5e8ef39000 r--s 00000000 08:04 287121
/var/cache/fontconfig/946752ae7a90c323083f887d43ff0bb2-le64.cache-3
7f5e8ef39000-7f5e8ef3e000 r--s 00000000 08:04 287118
/var/cache/fontconfig/921a30a17f0be15c70ac14043cb7a739-le64.cache-3
7f5e8ef3e000-7f5e8ef3f000 r--s 00000000 08:04 287115
/var/cache/fontconfig/617957603a337376ca8784972c6029f5-le64.cache-3
7f5e8ef3f000-7f5e8ef40000 r--s 00000000 08:04 287114
/var/cache/fontconfig/77b18b36891b2c3ee123bc985c86a99d-le64.cache-3
7f5e8ef40000-7f5e8ef43000 r--s 00000000 08:04 287113
/var/cache/fontconfig/b5ea634b0fb353b8ea17632d1f9ef766-le64.cache-3
7f5e8ef43000-7f5e8ef4e000 r--s 00000000 08:04 287112
/var/cache/fontconfig/5aa9259560595826861fba5056bf4850-le64.cache-3
7f5e8ef4e000-7f5e8ef52000 r--s 00000000 08:04 287109
/var/cache/fontconfig/6eb3985aa4124903f6ff08ba781cd364-le64.cache-3
7f5e8ef52000-7f5e8ef7b000 r--s 00000000 08:04 287108
/var/cache/fontconfig/4ca92cf76c0cf3dfa7f011127eff595d-le64.cache-3
7f5e8ef7b000-7f5e8efa7000 r--s 00000000 08:04 287101
/var/cache/fontconfig/6abf76b0b4cc7192703d8431ac929b75-le64.cache-3
7f5e8efa7000-7f5e8efd5000 r--s 00000000 08:04 287098
/var/cache/fontconfig/f408d08d2fce062ab660f628db78bf96-le64.cache-3
7f5e8efd5000-7f5e8efd6000 r--s 00000000 08:04 287097
/var/cache/fontconfig/4c73fe0c47614734b17d736dbde7580a-le64.cache-3
7f5e8efd6000-7f5e8efd7000 r--s 00000000 08:04 287075
/var/cache/fontconfig/0d8c3b2ac0904cb8a57a757ad11a4a08-le64.cache-3
7f5e8efd7000-7f5e8efd8000 r--s 00000000 08:04 287072
/var/cache/fontconfig/6a53c69dea097a2d716e069445527da8-le64.cache-3
7f5e8efd8000-7f5e8efda000 r--s 00000000 08:04 287070
/var/cache/fontconfig/406bd5c19e5cc517440ee75488dad48e-le64.cache-3
7f5e8efda000-7f5e8efde000 r--s 00000000 08:04 286951
/var/cache/fontconfig/dfe01fa16583a856689483e0569db943-le64.cache-3
7f5e8efde000-7f5e8efe4000 r--s 00000000 08:04 286934
/var/cache/fontconfig/a755afe4a08bf5b97852ceb7400b47bc-le64.cache-3
7f5e8efe4000-7f5e8efe5000 r--s 00000000 08:04 286812
/var/cache/fontconfig/7ee55724f82591cb35c3d9771e9e69ed-le64.cache-3
7f5e8efe5000-7f5e8efe8000 r--s 00000000 08:04 285539
/var/cache/fontconfig/f680583fed5bdc90d95a16af47e16528-le64.cache-3
7f5e8efe8000-7f5e8efe9000 r--s 00000000 08:04 285535
/var/cache/fontconfig/a8d35ba226d862df35f7c320f882e11a-le64.cache-3
7f5e8efe9000-7f5e8efea000 r--s 00000000 08:04 285516
/var/cache/fontconfig/818fefaf4a9a6d62e9703ad211f6e18f-le64.cache-3
7f5e8efea000-7f5e8efeb000 r--s 00000000 08:04 285513
/var/cache/fontconfig/342245cecc7b46fd40dc20a7c48a9d74-le64.cache-3
7f5e8efeb000-7f5e8eff0000 r--s 00000000 08:04 285512
/var/cache/fontconfig/515ca1ebc4b18308bea979be5704f9db-le64.cache-3
7f5e8eff0000-7f5e8eff9000 r--s 00000000 08:04 285204
/var/cache/fontconfig/6d41288fd70b0be22e8c3a91e032eec0-le64.cache-3
7f5e8eff9000-7f5e8effa000 r--s 00000000 08:04 284960
/var/cache/fontconfig/ae93d27baa4fa58a887d08a84c8b8bdf-le64.cache-3
7f5e8effa000-7f5e8effe000 r--s 00000000 08:04 272586
/var/cache/fontconfig/24cfa87181cfa5a1c0a5ecfd4c14c4b3-le64.cache-3
7f5e8effe000-7f5e8f001000 r--s 00000000 08:04 290354
/var/cache/fontconfig/de156ccd2eddbdc19d37a45b8b2aac9c-le64.cache-3
7f5e8f001000-7f5e8f003000 r--s 00000000 08:04 284875
/var/cache/fontconfig/4609d6ed693fb2a61c04ed6a1f4c071e-le64.cache-3
7f5e8f003000-7f5e8f00b000 r--s 00000000 08:04 279302
/var/cache/fontconfig/a6354e3ac43af67bd8d7b8e43c34e49f-le64.cache-3
7f5e8f00b000-7f5e8f00c000 r--s 00000000 08:04 279279
/var/cache/fontconfig/4c8bd476623eafb6fe862291a3b05f7d-le64.cache-3
7f5e8f00c000-7f5e8f01c000 r--s 00000000 08:04 277518
/var/cache/fontconfig/0f34bcd4b6ee430af32735b75db7f02b-le64.cache-3
7f5e8f01c000-7f5e8f01f000 r--s 00000000 08:04 277393
/var/cache/fontconfig/d60319d88cac85ba9e1a07bd06cfbb8c-le64.cache-3
7f5e8f01f000-7f5e8f020000 r--s 00000000 08:04 277384
/var/cache/fontconfig/9451a55048e8dbe8633e64d34165fdf2-le64.cache-3
7f5e8f020000-7f5e8f021000 r--s 00000000 08:04 276794
/var/cache/fontconfig/4794a0821666d79190d59a36cb4f44b5-le64.cache-3
7f5e8f021000-7f5e8f024000 r--s 00000000 08:04 276621
/var/cache/fontconfig/48b6b01af2a6a6e7e7f3fa61998c4afa-le64.cache-3
7f5e8f024000-7f5e8f052000 r--s 00000000 08:04 276311
/var/cache/fontconfig/365b55f210c0a22e9a19e35191240f32-le64.cache-3
7f5e8f052000-7f5e8f054000 r--s 00000000 08:04 276201
/var/cache/fontconfig/85130c034ee6c6a57445579585c0b546-le64.cache-3
7f5e8f054000-7f5e8f058000 r--s 00000000 08:04 276091
/var/cache/fontconfig/0dad82dbaa6c15cf0806f139d62298a3-le64.cache-3
7f5e8f058000-7f5e8f05b000 r--s 00000000 08:04 276036
/var/cache/fontconfig/2c5ba8142dffc8bf0377700342b8ca1a-le64.cache-3
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: libc6 2.11.1-0ubuntu7.2
Uname: Linux 2.6.33-29-realtime x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Mon Oct 18 14:46:15 2010
InstallationMedia: KXStudio 10.04 "Lucid Lynx" (Live 64bit)
ProcEnviron:
SHELL=/bin/bash
PATH=(custom, user)
LANG=ru_RU.UTF-8
SourcePackage: eglibc
** Affects: eglibc (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid
--
argz_extract() breaks freeing of both "argv" and "argz" strings
https://bugs.launchpad.net/bugs/662561
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