compiz crashed with SIGSEGV in __libc_free()

[Serge Hallyn]

Binary package hint: compiz

This is the second time this morning that compiz crashed while I was switching fields in firefox.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110406-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 270.30 Fri Feb 25 14:34:55 PST 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu1)
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,gnomecompat,move,place,regex,resize,zoom,snap,grid,session,vpswitch,mousepoll,animation,wall,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
Date: Thu Apr 7 11:40:41 2011
DistUpgraded: Log time: 2010-11-28 13:10:55.536503
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 nVidia Corporation GT218 [GeForce 310M] [10de:0a75] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Sony Corporation Device [104d:9067]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100820)
InstallationMedia_: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100820)
JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
MachineType: Sony Corporation VPCF11KFX
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=UUID=39014c73-b7b6-48d9-9ae6-62eec39544eb ro crashkernel=384M-2G:64M,2G-:128M
ProcVersionSignature_: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0x7f400640d8c3 <__libc_free+83>: lock cmpxchg %esi,(%rbx)
 PC (0x7f400640d8c3) ok
 source "%esi" ok
 destination "(%rbx)" (0x7f3fb000001f) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 __libc_free (mem=0x7f3ff0158660) at malloc.c:3736
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_variant_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_hash_table_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in __libc_free()
UpgradeStatus: Upgraded to natty on 2010-11-28 (129 days ago)
UserGroups: adm admin cdrom dialout kvm libvirtd lpadmin netdev plugdev sambashare sbuild sudo
dmi.bios.date: 12/07/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R0250Y6
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR0250Y6:bd12/07/2009:svnSonyCorporation:pnVPCF11KFX:pvrR5840006:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VPCF11KFX
dmi.product.version: R5840006
dmi.sys.vendor: Sony Corporation
version.compiz: compiz 1:0.9.4git20110322-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu11
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.1-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental 7.10.1-0ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
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 2:2.14.0-4ubuntu6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #753186, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.