BUG: unable to handle kernel NULL pointer dereference at 0000000000000010

[Nicola]

During normal use, the system crashed reporting this message:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
I am attaching the kernel backtrace that was dumped to the console and to kern.log

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-54-generic 3.2.0-54.82
ProcVersionSignature: Ubuntu 3.2.0-54.82-generic 3.2.50
Uname: Linux 3.2.0-54-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nicola 2291 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xe2e60000 irq 47'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:111d76e7,10280492,00100102 HDA:80862805,80860101,00100000'
   Controls : 37
   Simple ctrls : 13
Date: Mon Sep 23 12:06:37 2013
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Dell Inc. Latitude E6320
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-54-generic root=UUID=1efb2c8a-140f-4f44-9a98-fe9c6810c31c ro crashkernel=384M-2G:64M,2G-:128M quiet splash drm_kms_helper.poll=0 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-54-generic N/A
 linux-backports-modules-3.2.0-54-generic N/A
 linux-firmware 1.79.6
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-08-27 (392 days ago)
dmi.bios.date: 03/07/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A17
dmi.board.name: 0GJF11
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA17:bd03/07/2013:svnDellInc.:pnLatitudeE6320:pvr01:rvnDellInc.:rn0GJF11:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6320
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a kernel version where you were not having this particular problem? This will help determine if the problem you are seeing is the result of the introduction of a regression, and when this regression was introduced. If this is a regression, we can perform a kernel bisect to identify the commit that introduced the problem.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.12 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc1-saucy/

[Nicola (nicobaldo)]

Hi Josep,

yes this bug appeared after an upgrade, I was previously using kernel 3.2.0-47 and this bug did not occur.
I am attaching another trace that I got again with kernel 3.2.0-54, the overall symptom is the same (system crashes) though the kernel log looks a bit different.

I'll give a try to the mainline kernel and let you know.

[Nicola (nicobaldo)]

I've been running 3.12.0-031200rc1-generic for about a month and the bug never occurred

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]