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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1403999

Title:
  libcrc32c: module verification failed: signature and/or  required key
  missing - tainting kernel

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hello, I updated Ubuntu yesterday w/ the following packages:

  Start-Date: 2014-12-17  16:46:20
  Commandline: aptdaemon role='role-commit-packages' sender=':1.406'
  Upgrade: linux-headers-3.16.0-28:amd64 (3.16.0-28.37, 3.16.0-28.38), linux-tools-common:amd64 (3.16.0-28.37, 3.16.0-28.38), linux-image-3.16.0-28-generic:amd64 (3.16.0-28.37, 3.16.0-28.38), linux-tools-3.16.0-28-generic:amd64 (3.16.0-28.37, 3.16.0-28.38), language-pack-gnome-en:amd64 (14.10+20141020, 14.10+20141205), linux-headers-3.16.0-28-generic:amd64 (3.16.0-28.37, 3.16.0-28.38), linux-tools-3.16.0-28:amd64 (3.16.0-28.37, 3.16.0-28.38), linux-image-extra-3.16.0-28-generic:amd64 (3.16.0-28.37, 3.16.0-28.38), linux-signed-image-3.16.0-28-generic:amd64 (3.16.0-28.37, 3.16.0-28.38), language-pack-gnome-en-base:amd64 (14.10+20141020, 14.10+20141205), linux-libc-dev:amd64 (3.16.0-28.37, 3.16.0-28.38)
  End-Date: 2014-12-17  16:47:03

  After the update, I noticed the following lines in dmesg:

  [450533.640533] Request for unknown module key 'Magrathea: Glacier signing key: af30e7f37b41301c96f985f4789da5f4373e9e92' err -11
  [450533.640575] libcrc32c: module verification failed: signature and/or  required key missing - tainting kernel

  
  Should I be worried? I didn't reboot yet but I have secure boot disabled so I don't think that I would have any issue bug I'm wondering why I got hat msg.

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