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[Dominic Raferd <1418286@xxxxxxxxxxxxxxxxxx>]

I am using the 3.19.0-031900 kernel with Ubuntu 14.04 and I am seeing
the 'Magrathea' message in dmesg:

$ dmesg -T|grep -E "(319|Magra)"
[Sat Mar  7 11:39:12 2015] Linux version 3.19.0-031900-generic (kernel@tangerine) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201502091451 SMP Mon Feb 9 14:52:52 UTC 2015
[Sat Mar  7 11:39:12 2015] Command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-031900-generic root=UUID=034f0162-ec48-4103-8f24-b15f1fd1a08d ro find_preseed=/preseed.cfg noprompt quiet
[Sat Mar  7 11:39:12 2015] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-031900-generic root=UUID=034f0162-ec48-4103-8f24-b15f1fd1a08d ro find_preseed=/preseed.cfg noprompt quiet
[Sat Mar  7 11:39:13 2015] usb usb1: Manufacturer: Linux 3.19.0-031900-generic ehci_hcd
[Sat Mar  7 11:39:13 2015] usb usb2: Manufacturer: Linux 3.19.0-031900-generic uhci_hcd
[Sat Mar  7 11:39:13 2015] Loaded X.509 cert 'Magrathea: Glacier signing key: 7271576a09d86ef244371b0633e47abb75b89d'
[Sat Mar  7 11:39:13 2015] Request for unknown module key 'Magrathea: Glacier signing key: 007271576a09d86ef244371b0633e47abb75b89d' err -11
[... Magrathea message repeated many many times! ...]

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https://bugs.launchpad.net/bugs/1418286

Title:
  kernel BUG at /build/buildd/linux-3.18.0/mm/slub.c:3334!

Status in linux package in Ubuntu:
  Triaged

Bug description:
  This is a fresh install. On the first boot, I did an `apt-get update
  && apt-get dist-upgrade", then this error has been showing up on every
  boot since.

  ProblemType: KernelOops
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.18.0-12-generic 3.18.0-12.13
  ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4
  Uname: Linux 3.18.0-12-generic x86_64
  Annotation: Your system might become unstablenow and might need to be restarted.
  ApportVersion: 2.15.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  vader      2429 F.... pulseaudio
   /dev/snd/controlC1:  vader      2429 F.... pulseaudio
  Date: Wed Feb  4 18:34:37 2015
  Failure: oops
  HibernationDevice: RESUME=UUID=11449e64-6ee6-4d54-b336-bce8608c56c9
  InstallationDate: Installed on 2015-02-04 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20141218)
  MachineType: ASUSTeK COMPUTER INC. Q501LA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.18.0-12-generic root=UUID=3f2d8fd8-7c79-4d11-ae2d-b0cd1b27db9c ro quiet splash vt.handoff=7
  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: kernel BUG at /build/buildd/linux-3.18.0/mm/slub.c:3334!
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/19/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: Q501LA.207
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: Q501LA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrQ501LA.207:bd06/19/2013:svnASUSTeKCOMPUTERINC.:pnQ501LA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnQ501LA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: Q501LA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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