Ubuntu
linux package

BUG: unable to handle kernel NULL pointer dereference at (null)

Bug #745362 reported by Massimiliano Forner on 2011-03-29

This bug report is a duplicate of: Bug #775138: Kernel Oops - unable to handle kernel paging request; EIP is at vhba_ctl_read+0x1fe/0x2e0 [vhba]. Edit Remove

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	cdemu	Triaged	Undecided	CDEmu
	linux (Ubuntu)	Invalid	Low	Unassigned

Bug Description

11.04 Alpha Release

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic 2.6.38-7.39
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
NonfreeKernelModules: openafs nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: massimiliano 3929 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf8400000 irq 47'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,103c30cc,00100003 HDA:10573055,10573055,00100700'
   Controls : 21
   Simple ctrls : 13
Date: Wed Mar 30 01:04:37 2011
Failure: oops
Frequency: Once a day.
HibernationDevice: RESUME=UUID=40cb1a91-6429-4fa6-8f5b-8952fe377fc2
MachineType: Hewlett-Packard HP Pavilion dv6500 Notebook PC
ProcKernelCmdLine: root=UUID=e069f758-844f-4aa6-8530-6df59c525938 ro quiet splash vga=792
RelatedPackageVersions:
linux-restricted-modules-2.6.38-7-generic N/A
linux-backports-modules-2.6.38-7-generic N/A
linux-firmware 1.49
SourcePackage: linux
Title: BUG: unable to handle kernel NULL pointer dereference at (null)
UpgradeStatus: Upgraded to natty on 2011-03-29 (0 days ago)
WpaSupplicantLog:

dmi.bios.date: 10/03/2007
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.23
dmi.board.name: 30D2
dmi.board.vendor: Quanta
dmi.board.version: 79.22
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.23:bd10/03/2007:svnHewlett-Packard:pnHPPaviliondv6500NotebookPC:pvrRev1:rvnQuanta:rn30D2:rvr79.22:cvnQuanta:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv6500 Notebook PC
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard

Tags:

Revision history for this message

Massimiliano Forner (ced-assistenza) wrote on 2011-03-29:

AcpiTables.txt Edit (182.3 KiB, text/plain; charset="utf-8")
AlsaDevices.txt Edit (644 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (385 bytes, text/plain; charset="utf-8")
ArecordDevices.txt Edit (268 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (54.5 KiB, text/plain; charset="utf-8")
CRDA.txt Edit (257 bytes, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (2.5 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.0.txt Edit (8.7 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.1.txt Edit (159 bytes, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (3.9 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (1.9 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (346 bytes, text/plain; charset="utf-8")
Lspci.txt Edit (32.1 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (571 bytes, text/plain; charset="utf-8")
OopsText.txt Edit (2.2 KiB, text/plain; charset="utf-8")
PciMultimedia.txt Edit (2.3 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcCpuinfo_.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.7 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (3.4 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (120 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (85.9 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (263.7 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (231.7 KiB, text/plain; charset="utf-8")

Revision history for this message

Seth Forshee (sforshee) wrote on 2011-03-31:

The invalid memory access comes from the vhba module, which seems to be associated with cdemu and afaict isn't supported in natty. Is this something you installed yourself?

Changed in linux (Ubuntu):
status:	New → Incomplete

Revision history for this message

Massimiliano Forner (ced-assistenza) wrote on 2011-04-01:

cdemu was uninstalled by the upgrade process. I don't know about afaict.

Revision history for this message

Seth Forshee (sforshee) wrote on 2011-04-01:

Sorry, afaict="as far as I can tell".

That module is from cdemu, and you have a process named cdemud, so something to do with cdemu is still on your system and running. Maybe try running 'sudo dpkg --purge cdemu' in a terminal?

If that doesn't work, try running 'dpkg -S cdemud' and/or 'dpkg -S vhba.ko', which should tell you which installed packages (if any) are installing the files. Then you can remove the offending packages, or if it's a maintained package we can assign this bug appropriately.

Revision history for this message

Cyrille Duverne (cyrille-duverne-nexen) wrote on 2011-04-24:

Hello,

I'm facing the same issue, when running 'sudo dpkg --purge cdemu' -> No return
But when running 'dpkg -S cdemud' I'm getting the following list :

cdemu-daemon: /etc/dbus-1/system.d/cdemud-dbus.conf
cdemu-daemon: /usr/share/man/man8/cdemud.8.gz
cdemu-daemon: /usr/bin/cdemud

Does this mean that I have to remove 'cdemu-daemon' ?

Kind regards
CYD

Revision history for this message

Cyrille Duverne (cyrille-duverne-nexen) wrote on 2011-04-24:

For more details,

I'm running 11.04 beta on a DELL LATITUDE E5410.

Revision history for this message

Seth Forshee (sforshee) wrote on 2011-04-28:

@Cyrille, the problem isn't cdemu-daemon itself, it's the vhba module. So you ought to run 'dpkg -S vhba.ko' and remove the identified package. That may be the same package, and even if it's not it seems likely that cdemud won't function without it.

Please report back here whether or not removing the package providing vhba.ko eliminates the issue. Thanks!

Changed in linux (Ubuntu):
assignee:	nobody → Seth Forshee (sforshee)
importance:	Undecided → Low

Brian Murray (brian-murray) on 2011-06-29

tags:

added: vhba

Brian Murray (brian-murray) on 2011-07-14

tags:

added: kernel-driver-vhba

Revision history for this message

Seth Forshee (sforshee) wrote on 2011-09-16:

There's been no response for a while, and the problem doesn't seem to be with the kernel anyway. Thus I'm changing the status to invalid.

Changed in linux (Ubuntu):
status:	Incomplete → Invalid

Henrik S. (henrik-hw0) on 2012-04-09

Changed in cdemu:
status:	New → Triaged
assignee:	nobody → CDEmu (cdemu)

Henrik S. (henrik-hw0) on 2012-04-10

Changed in linux (Ubuntu):
assignee:	Seth Forshee (sforshee) → nobody

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