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[Bug 1439849] Re: BUG: unable to handle kernel NULL pointer dereference at 0000000000000010


Do you have a proper kernel log with this bug? Or perhaps if you can
setup crashdump on your laptop and trigger this it may make it easier to
get information about the crash. Then identifying the delta may be

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  BUG: unable to handle kernel NULL pointer dereference at

Status in linux package in Ubuntu:

Bug description:
  I hit this bug as I'm logging in to an encrypted home account after
  booting with systemd. It results in a hung system immediately after
  the password authentication stage as pam_ecryptfs call mount.ecryptfs
  to mount the user's encrypted home directory.

  I can't reproduce it in a VM. Booting with upstart works fine. I was
  previously booting with systemd without any problem so this may be due
  to a change in the 219-6ubuntu1 systemd update.

  ProblemType: KernelOops
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-11-generic 3.19.0-11.11
  ProcVersionSignature: Ubuntu 3.19.0-11.11-generic 3.19.3
  Uname: Linux 3.19.0-11-generic x86_64
  Annotation: Your system might become unstablenow and might need to be restarted.
  ApportVersion: 2.17-0ubuntu1
  Architecture: amd64
   /dev/snd/controlC0:  tyhicks    3786 F.... pulseaudio
  Date: Thu Apr  2 14:19:21 2015
  DuplicateSignature: BUG: unable to handle kernel NULL pointer dereference at location RIP: 0010:location  location propagate_one+0xc7/0x1e0
  Failure: oops
  InstallationDate: Installed on 2011-08-23 (1318 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  MachineType: LENOVO 4286CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-11-generic root=UUID=bd144b12-0d78-4d1e-b69c-8d83ee663c8f ro quiet splash kaslr crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7 init=/sbin/upstart
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu8
  SourcePackage: linux
  Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
  UpgradeStatus: Upgraded to vivid on 2015-02-27 (34 days ago)
  dmi.bios.date: 04/11/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET68WW (1.38 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4286CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8DET68WW(1.38):bd04/11/2013:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4286CTO
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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