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[John Johansen <john.johansen@xxxxxxxxxxxxx>]

Can you please install the following test kernel and report whether it
fixes the issue

http://people.canonical.com/~jj/lp1430546/

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https://bugs.launchpad.net/bugs/1430546

Title:
  apparmor kernel BUG kills firefox

Status in linux package in Ubuntu:
  Triaged

Bug description:
  I got this kernel BUG last night and its happened a couple of times
  now since I upgraded to Utopic.  When it happens one of my firefoxs
  will becomes non-functional and I have to reboot to get it unstuck.

  I'm using encrypted home dir (ecryptfs) and the packaged firefox
  profile in enforce mode with a small
  /etc/apparmor.d/local/usr.bin.firefox.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-31-generic 3.16.0-31.41
  ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5
  Uname: Linux 3.16.0-31-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   james      3599 F...m pulseaudio
   /dev/snd/controlC0:  james      3599 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Mar 10 21:38:33 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-10-20 (1237 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: TOSHIBA TECRA R840
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-31-generic root=UUID=b59c3fb7-c197-4238-8dd3-f71d81bbb315 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-31-generic N/A
   linux-backports-modules-3.16.0-31-generic  N/A
   linux-firmware                             1.138.1
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2015-01-05 (64 days ago)
  dmi.bios.date: 07/12/2011
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 2.90
  dmi.board.asset.tag: 0000000000
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Version A0
  dmi.chassis.asset.tag: 0000000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: Version 1.0
  dmi.modalias: dmi:bvnTOSHIBA:bvrVersion2.90:bd07/12/2011:svnTOSHIBA:pnTECRAR840:pvrPT42GE-00N006EN:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: TECRA R840
  dmi.product.version: PT42GE-00N006EN
  dmi.sys.vendor: TOSHIBA

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