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[Rick Lavoie <rlavoie83@xxxxxxxxx>]

The 3.11.5-031105.201311251400_amd64
(6b8fe6d417f93fa628779b1afd9e7717bbcb0572) kernel is bad, I was able to
trigger the oops. However, the oops was only triggered after several
days of usage, making me uneasy that the cause of the oops might be
present in earlier kernels and I simply failed to trigger it.

In the meantime until I get a new kernel to test, I'll go back to some
previous kernels and test them a bit more to see if I can trigger
anything.

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https://bugs.launchpad.net/bugs/1249719

Title:
  Kernel oops - BUG: unable to handle kernel NULL pointer dereference at
  0000000000000030; IP: [<ffffffff811c07c7>] touch_atime+0x17/0x140

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Since 3.11.0-13-generic, I've been encountering the following kernel
  oops. I can trigger it quite reliably by watching full-screen videos
  on YouTube using google-chrome (Version 31.0.1650.48) for roughly 10
  minutes. Once the oops happens, the system remains up, but certain
  programs (like top) start hanging and a reboot is needed to restore
  full functionality.

  I've tried using 3.12.0-999-generic (3.12.0-999.201311080433), but get
  the same problem there. I don't get the oops when booting into
  3.11.0-12-generic, so I suspect the problem was introduced in
  3.11.0-13-generic (especially since I see there were some changes made
  related to the shmat system call).

  Attached is the oops from dmesg. The EIP location and stack-trace are
  identical for all the oops I've seen so far.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-13-generic 3.11.0-13.20
  ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
  Uname: Linux 3.11.0-13-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  rick       1421 F.... pulseaudio
   /dev/snd/controlC1:  rick       1421 F.... pulseaudio
   /dev/snd/controlC0:  rick       1421 F.... pulseaudio
  Date: Sat Nov  9 23:24:33 2013
  HibernationDevice: RESUME=UUID=0ad92a6e-2969-424f-b469-faaa9f2ec20f
  InstallationDate: Installed on 2012-10-19 (387 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. X58A-UD3R
  MarkForUpload: True
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=cf7d6665-f4a9-4be8-a12d-c72a985ea5eb ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-13-generic N/A
   linux-backports-modules-3.11.0-13-generic  N/A
   linux-firmware                             1.116
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to saucy on 2013-10-19 (22 days ago)
  dmi.bios.date: 03/11/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F5
  dmi.board.name: X58A-UD3R
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF5:bd03/11/2010:svnGigabyteTechnologyCo.,Ltd.:pnX58A-UD3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnX58A-UD3R:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: X58A-UD3R
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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