Xorg crashed with SIGSEGV in WriteToClient()

[Esa-leirivaara]

-Ubuntu 12.04 amd64
-Nvidia-current

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-core 2:1.11.3-0ubuntu9
ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] On hakemisto: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 290.10 Wed Nov 16 17:39:29 PST 2011
 GCC version: gcc-versio 4.6.2 (Ubuntu/Linaro 4.6.2-12ubuntu1)
.tmp.unity.support.test.0:

ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Wed Feb 1 17:31:25 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 290.10, 3.2.0-10-generic, x86_64: installed
 nvidia-current, 290.10, 3.2.0-11-generic, x86_64: installed
 nvidia-current, 290.10, 3.2.0-12-generic, x86_64: installed
ExecutablePath: /usr/bin/Xorg
GraphicsCard:
 NVIDIA Corporation G96 [GeForce 9400 GT] [10de:0641] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: NVIDIA Corporation Device [10de:0551]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120126)
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 03f0:0b0c Hewlett-Packard Wireless Keyboard and Optical Mouse receiver
 Bus 002 Device 003: ID 058f:9360 Alcor Micro Corp. 8-in-1 Media Card Reader
 Bus 002 Device 004: ID 046d:c045 Logitech, Inc. Optical Mouse
MachineType: HP Pavilion 061 RF143AA-ABX m7530.fi-a
ProcCmdline: /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background none
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-12-generic root=UUID=3c7e16b5-26f7-4128-a118-cef76ecb2fbc ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f0a2d4ee06c <WriteToClient+700>: mov (%r12),%rax
 PC (0x7f0a2d4ee06c) ok
 source "(%r12)" (0xffffffff00000001) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: nvidia-graphics-drivers
StacktraceTop:
 WriteToClient ()
 WriteEventsToClient ()
 TryClientEvents ()
 ?? ()
 DeliverEventsToWindow ()
Title: Xorg crashed with SIGSEGV in WriteToClient()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 06/29/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3.12
dmi.board.name: Nash
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.type: 3
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3.12:bd06/29/2006:svnHPPavilion061:pnRF143AA-ABXm7530.fi-a:pvr0nx0114RE101NASHM00:rvnMSI:rnNash:rvr1.0:cvn:ct3:cvr:
dmi.product.name: RF143AA-ABX m7530.fi-a
dmi.product.version: 0nx0114RE101NASHM00
dmi.sys.vendor: HP Pavilion 061
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs 20090808ubuntu33
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.3-0ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901-1ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Apport retracing service (apport)]

StacktraceTop:
 WriteToClient (who=0x7f0a2f7b24f0, count=32, __buf=0x7fff8a94d690) at ../../os/io.c:789
 WriteEventsToClient (events=0x7fff8a94d690, count=1, pClient=<optimized out>) at ../../dix/events.c:6133
 WriteEventsToClient (pClient=0x7f0a2f7b24f0, count=<optimized out>, events=<optimized out>) at ../../dix/events.c:6017
 TryClientEvents (mask=<optimized out>, count=<optimized out>, pEvents=0x7fff8a94d690, dev=<optimized out>, client=0x7f0a2f7b24f0, filter=<optimized out>, grab=<optimized out>) at ../../dix/events.c:1965
 TryClientEvents (client=0x7f0a2f7b24f0, dev=<optimized out>, pEvents=0x7fff8a94d690, count=<optimized out>, mask=<optimized out>, filter=<optimized out>, grab=0x0) at ../../dix/events.c:1856

[Bryce Harrington (bryce)]

Thread 1 (Thread 0x7f0a2d3378a0 (LWP 1278)):
#0 WriteToClient (who=0x7f0a2f59d8e0, count=32, __buf=0x7fff8a94c8e0) at ../../os/io.c:789
        oc = 0x7f0a2f3453c0
        oco = 0xffffffff00000001
        padBytes = <optimized out>
        buf = 0x7fff8a94c8e0 "s\311!I~\020R\001\003\004"

The oco pointer address looks wrong. This seems to be something wrong in the server, likely not the driver.

WriteToClient (ClientPtr who, int count, const void *__buf)
    ...
    oc = who->osPrivate;
    oco = oc->output;
    ...
    if ((oco = FreeOutputs))
        {
            FreeOutputs = oco->next; // line io.c:789
        }

[Esa-leirivaara (esa-leirivaara)]

I don't know how important is this because it has happened only once so far.

[Bryce Harrington (bryce)]

Heya,

There is a new nvidia driver 295.20, can you update to that and re-test? We've had another user report that a similar crash got fixed when they updated to 295.20.

[Esa-leirivaara (esa-leirivaara)]

Hi Bryce.

I have 295.20 driver, just checked. And this xorg -crash happened only once if i remember correctly, so... Maybe it's long gone.

[Bryce Harrington (bryce)]

Alright, thanks. Let's go ahead and close it out then. If it comes back, feel free to reopen or file anew at your discretion. Thanks for following up!