Xorg crashed with SIGSEGV in __kernel_vsyscall()

[toobuntu]

Apport popped up with this on a Karmic Alpha 5 virtual machine in virtualbox-ose running on a Jaunty host after logging out and logging back in again (not a full restart).

On host:
$ apt-cache policy virtualbox-ose
virtualbox-ose:
  Installed: 3.0.4-dfsg-1ubuntu1~jaunty0
  Candidate: 3.0.4-dfsg-1ubuntu1~jaunty0
  Version table:
 *** 3.0.4-dfsg-1ubuntu1~jaunty0 0
        500 http://ppa.launchpad.net jaunty/main Packages
        100 /var/lib/dpkg/status
     2.1.4-dfsg-1ubuntu3 0
        500 http://us.archive.ubuntu.com jaunty/universe Packages

On guest:
$ apt-cache policy virtualbox-ose-guest-x11
virtualbox-ose-guest-x11:
  Installed: 3.0.4-dfsg-1ubuntu1
  Candidate: 3.0.4-dfsg-1ubuntu1
  Version table:
 *** 3.0.4-dfsg-1ubuntu1 0
        500 http://us.archive.ubuntu.com karmic/universe Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
Architecture: i386
CurrentDmesg:
 Error: command ['sh', '-c', 'dmesg | comm -13 /var/log/dmesg -'] failed with exit code 1: [ 68.523923] eth0: no IPv6 routers present
 comm: file 2 is not in sorted order
 [ 3388.350285] hrtimer: interrupt too slow, forcing clock min delta to 3235809 ns
Date: Sat Sep 5 11:01:20 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/Xorg
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: innotek GmbH VirtualBox
Package: xserver-xorg-core 2:1.6.3-1ubuntu5
PccardctlIdent:

PccardctlStatus:

PciDisplay:
 00:02.0 VGA compatible controller [0300]: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter [80ee:beef]
  Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  Latency: 64
  Region 0: Memory at e0000000 (32-bit, prefetchable) [size=16M]
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-9-generic root=UUID=d6cd6490-e31f-40d8-8e27-71f48bc62c6b ro quiet splash
ProcCmdline: /usr/bin/X :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-1OpN68/database -nolisten tcp
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
ProcVersionSignature: Ubuntu 2.6.31-9.29-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu3
 libdrm2 2.4.12+git20090801.45078630-0ubuntu1
 xserver-xorg-video-intel 2:2.8.1-1ubuntu1
 xserver-xorg-video-ati 1:6.12.99+git20090825.fc74e119-0ubuntu1
SegvAnalysis:
 Segfault happened at: 0x2cad40: or %al,(%eax)
 PC (0x002cad40) ok
 source "%al" ok
 destination "(%eax)" (0x0000000f) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: xorg-server
StacktraceTop:
 __kernel_vsyscall ()
 select () from /lib/tls/i686/cmov/libc.so.6
 WaitForSomething ()
 Dispatch ()
 main ()
Title: Xorg crashed with SIGSEGV in __kernel_vsyscall()
Uname: Linux 2.6.31-9-generic i686
UserGroups:

XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.31-9-generic

[Apport retracing service (apport)]

StacktraceTop:?? () from /usr/lib/xorg/modules/input//vboxmouse_drv.so
Dispatch () at ../../dix/dispatch.c:367
main (argc=8, argv=0xbfff0244, envp=0xbfff0268)

[Kedar P Bhise (kedarbhise)]

Using karmic-alpha from 12 Aug 2009 on VirtualBox 3.0.4 - free edition, NOT ose.

I receive the crash report for Xorg about once a day.

[Copernicus (twowayspirit)]

Exactly the same as Kedar here too.