BUG: unable to handle kernel NULL pointer dereference while stopping apparmor, kvm related?

Bug #444365 reported by Arnd on 2009-10-06
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

I was using kvm, while noticing a huge number of messages like this:

[662434.587171] type=1502 audit(1254817836.448:1893215): operation="file_perm" pid=1717 parent=1 profile="/usr/sbin/libvirtd//null-e//null-10" requested_mask="::w" denied_mask="::w" fsuid=0 ouid=1000 name="/home/arnd/kvm/windowsxpsp3.qcow2"

I decided to stop apparmoer by issuing:
sudo /etc/init.d/apparmor stop

Maybe there is a problem with concurrent calls of apparmor (triggering audit messages by kvm) and stopping apparmor?

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: amd64
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
 /dev/dsp: root 1716 F.... kvm
 /dev/snd/controlC0: arnd 2464 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
 Card hw:0 'Intel'/'HDA Intel at 0xd0620000 irq 22'
   Mixer name : 'Analog Devices AD1882'
   Components : 'HDA:11d41882,80861003,00100300'
   Controls : 41
   Simple ctrls : 24
Date: Tue Oct 6 10:30:46 2009
DistroRelease: Ubuntu 9.10
Failure: oops
HibernationDevice: RESUME=/dev/sdb3
Package: linux-image-2.6.31-11-generic 2.6.31-11.36
ProcCmdLine: root=UUID=861603ac-5155-4707-ab0b-f3e756bdcd67 ro quiet splash quiet
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
 linux-backports-modules-2.6.31-11-generic N/A
 linux-firmware 1.19

SourcePackage: linux
Tags: kernel-oops
Title: [662439.535407] BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
Uname: Linux 2.6.31-11-generic x86_64

dmi.bios.date: 11/27/2008
dmi.bios.vendor: Intel Corp.
dmi.bios.version: CBQ4510H.86A.0067.2008.1127.1732
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DQ45CB
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE30148-205
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrCBQ4510H.86A.0067.2008.1127.1732:bd11/27/2008:svn:pn:pvr:rvnIntelCorporation:rnDQ45CB:rvrAAE30148-205:cvn:ct3:cvr:

Arnd (arnd-arndnet) wrote :
Jeremy Foshee (jeremyfoshee) wrote :

Hi Arnd,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 444365

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags: added: needs-kernel-logs
tags: added: needs-upstream-testing
tags: added: kj-triage
Changed in linux (Ubuntu):
status: New → Incomplete
Jeremy Foshee (jeremyfoshee) wrote :

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags: added: kj-expired
Changed in linux (Ubuntu):
status: Incomplete → Expired
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