uvcvideo: BUG: unable to handle kernel NULL pointer dereference

[Márton Németh]

There is a NULL pointer dereference when running the v4l-test SVN r47 available from http://v4l-test.sourceforge.net .

The problem happens on Acer Aspire 5310 series, Model JDW50. The laptop is equipped with the following webcam:
Bus 001 Device 002: ID 064e:a101 Suyin Corp. Acer CrystalEye Webcam

The problem happens when the following test case is executed:
  Test: VIDIOC_G_EXT_CTRLS with zero items to get, but with invalid count values ... Killed

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 2942 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd0440000 irq 22'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,1025012e,00100003 HDA:14f12c06,1025012e,00100000'
   Controls : 11
   Simple ctrls : 8
Date: Sun Dec 6 17:57:45 2009
DistroRelease: Ubuntu 9.10
Failure: oops
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: Acer Aspire 5310
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=hu console-setup/layoutcode?=hu
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-14-generic N/A
 linux-firmware 1.24
SourcePackage: linux
Tags: kernel-oops
Title: BUG: unable to handle kernel NULL pointer dereference at 00000010
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 07/17/2007
dmi.bios.vendor: Acer
dmi.bios.version: V1.50
dmi.board.name: Acadia
dmi.board.vendor: Acer
dmi.board.version: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvrV1.50:bd07/17/2007:svnAcer:pnAspire5310:pvrV1.50:rvnAcer:rnAcadia:rvrN/A:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5310
dmi.product.version: V1.50
dmi.sys.vendor: Acer

[Márton Németh (nm127-freemail)]

Maybe the following bug report is about the same problem: http://bugzilla.kernel.org/show_bug.cgi?id=13357

[Jeremy Foshee (jeremyfoshee)]

Hi Márton,

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 493246

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.]

[Brad Figg (brad-figg)]

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.