Xorg assert failure: *** glibc detected *** /usr/bin/X: free(): invalid next size (fast): 0x00000000015d4a20 ***

[Jason Smith]

I was browsing the internet

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-core 2:1.10.0.902-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: wl nvidia
Architecture: amd64
AssertionMessage: *** glibc detected *** /usr/bin/X: free(): invalid next size (fast): 0x00000000015d4a20 ***
Date: Sun Apr 10 11:42:58 2011
DistUpgraded: Log time: 2011-01-20 08:13:12.200592
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/Xorg
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcCmdline: /usr/bin/X :0 -nr -verbose -auth /var/run/gdm/auth-for-gdm-Z9AKIQ/database -nolisten tcp vt7
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
 abort () at abort.c:92
 __libc_message (do_abort=2, fmt=0x7f8661b55400 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (av=<value optimized out>, p=0x15d4a10) at malloc.c:6283
 _int_free (av=<value optimized out>, p=0x15d4a10) at malloc.c:4795
Title: Xorg assert failure: *** glibc detected *** /usr/bin/X: free(): invalid next size (fast): 0x00000000015d4a20 ***
UpgradeStatus: Upgraded to natty on 2011-01-20 (83 days ago)
UserGroups:

version.compiz: compiz 1:0.9.4+bzr20110411-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu12
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Apport retracing service (apport)]

StacktraceTop:
 raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
 abort () at abort.c:92
 __libc_message (do_abort=2, fmt=0x7f8661b55400 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
 malloc_printerr (av=<value optimized out>, p=0x15d4a10) at malloc.c:6283
 _int_free (av=<value optimized out>, p=0x15d4a10) at malloc.c:4795

[Bryce Harrington (bryce)]

This looks like an actionable bug that presumably will still be an issue in oneiric, so tagging as such. The issue hasn't been repro'd on oneiric, so probably should be rechecked at some point later on.

[Bryce Harrington (bryce)]

Actually, unfortunately the stacktrace is incomplete (lots of symbols optimized out).

Are you able to reproduce this crash or did it just occur the one time? If it's reproducible can you provide exact steps to reproduce it, or else collect a core dump from a crash?

[bugbot (bugbot)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.