Kernel Oops - BUG: unable to handle kernel NULL pointer dereference at 0000009c; EIP is at __ticket_spin_lock+0x8/0x30

[Rick Nagel]

Unplugged USB camera, System crash.

ProblemType: KernelOops
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-23-generic 3.2.0-23.36
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
Annotation: Your system might become unstable now and might need to be restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: I82801CAICH3 [Intel 82801CA-ICH3], device 0: Intel ICH [Intel 82801CA-ICH3]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu3
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rick 1781 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Card0.Amixer.info:
 Card hw:0 'I82801CAICH3'/'Intel 82801CA-ICH3 with AD1881A at irq 5'
   Mixer name : 'Analog Devices AD1881A'
   Components : 'AC97a:41445348'
   Controls : 31
   Simple ctrls : 21
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown'
   Mixer name : 'ThinkPad EC (unknown)'
   Components : ''
   Controls : 2
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
   Playback channels: Mono
   Limits: Playback 0 - 14
   Mono: Playback 11 [79%] [on]
CurrentDmesg: [ 134.745634] init: plymouth-stop pre-start process (2871) terminated with status 1
Date: Mon Apr 16 16:32:30 2012
Failure: oops
HibernationDevice: RESUME=UUID=811d2f88-f148-421c-90de-7d9be5a9e7c0
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: IBM 2652C4U
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   no card
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=9d6945f6-edff-4395-9c0d-9bd84bc0d23e ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-1ubuntu18
RfKill:

SourcePackage: linux
StagingDrivers: r8712u lirc_igorplugusb
Title: [171365.913830] BUG: unable to handle kernel NULL pointer dereference at 0000009c
UpgradeStatus: Upgraded to precise on 2012-01-28 (79 days ago)
dmi.bios.date: 08/23/2002
dmi.bios.vendor: IBM
dmi.bios.version: 1GET32WW (1.04 )
dmi.board.name: 2652C4U
dmi.board.vendor: IBM
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: IBM
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnIBM:bvr1GET32WW(1.04):bd08/23/2002:svnIBM:pn2652C4U:pvrNotAvailable:rvnIBM:rn2652C4U:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
dmi.product.name: 2652C4U
dmi.product.version: Not Available
dmi.sys.vendor: IBM