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[Bug 1542967] [NEW] compiz crashed with SIGSEGV in malloc_consolidate()


Public bug reported:

This crash just happened after the latest updates installed from the
main Ubuntu repos as of 2016-02-08 01:30 GMT when trying to login to a

Because compiz crashes before establishing a usable desktop, I have had
to revert back to a snapshot from 2016-02-05 to report the bug. So I
don't know if apport is reporting the correct versions of installed

I saw a similar thing happen a couple of weeks ago, and it turned out to
be due to an nvidia 352 driver update from xorg-edgers; I purged the
package and went back to using the nvidia 352 driver from the main
repositories. This fixed the problem at the time - I was able to install
all updates and compiz kept working. Note that I'm only using the nvidia
driver so bumblebee can turn off the nvidia card.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: compiz-core 1:
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CrashCounter: 1
CurrentDesktop: Unity
Date: Mon Feb  8 10:36:21 2016
DistUpgraded: 2016-01-06 09:07:31,911 DEBUG enabling apt cron job
DistroCodename: xenial
DistroVariant: ubuntu
 bbswitch, 0.8, 4.4.0-2-generic, x86_64: installed
 bbswitch, 0.8, 4.4.1-040401-generic, x86_64: installed
 nvidia-352-updates, 352.63, 4.4.1-040401-generic, x86_64: installed
 vboxhost, 5.0.14, 4.4.0-2-generic, x86_64: installed
 vboxhost, 5.0.14, 4.4.1-040401-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:050e]
 NVIDIA Corporation GF108M [GeForce GT 540M] [10de:0df4] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:050e]
InstallationDate: Installed on 2014-11-26 (439 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: Dell Inc. Dell System XPS L502X
ProcCmdline: compiz
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-2-generic root=UUID=8d6a5286-c675-44a2-9ee6-581a539e9915 ro rootflags=subvol=@ quiet splash vt.handoff=7
 Segfault happened at: 0x7f6075a8e12b <malloc_consolidate+299>:	mov    0x8(%r12),%r13
 PC (0x7f6075a8e12b) ok
 source "0x8(%r12)" (0x7f607820c800) not located in a known VMA region (needed readable region)!
 destination "%r13" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
 malloc_consolidate (av=av@entry=0x7f6075dd3c00 <main_arena>) at malloc.c:4136
 _int_free (av=0x7f6075dd3c00 <main_arena>, p=<optimised out>, have_lock=0) at malloc.c:4042
 __GI___libc_free (mem=<optimised out>) at malloc.c:2950
 ?? ()
 ?? ()
Title: compiz crashed with SIGSEGV in malloc_consolidate()
UpgradeStatus: Upgraded to xenial on 2016-01-06 (33 days ago)
UserGroups: adm lpadmin sambashare sudo
dmi.bios.date: 05/29/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0NJT03
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd05/29/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.66-2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.1-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.1-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.17.3-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160127-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Mon Feb  8 10:42:34 2016
xserver.configfile: default
xserver.errors: systemd-logind: failed to get session: PID 1831 does not belong to any known session
xserver.logfile: /var/log/Xorg.0.log
 product id                                6125 
 vendor                                     AUO
xserver.version: 2:1.17.3-2ubuntu2

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-crash compiz-0.9 need-amd64-retrace ubuntu xenial

** Information type changed from Private to Public

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  compiz crashed with SIGSEGV in malloc_consolidate()

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