[Bug 1063061] Re: please backport support for EFI vars > 1KB

[Launchpad Bug Tracker]

** Branch linked: lp:debian/mountall

** Branch linked: lp:~ubuntu-branches/ubuntu/precise/mountall/precise-
proposed

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https://bugs.launchpad.net/bugs/1063061

Title:
  please backport support for EFI vars > 1KB

Status in “linux” package in Ubuntu:
  Fix Released
Status in “mountall” package in Ubuntu:
  Fix Released
Status in “sbsigntool” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  Triaged
Status in “mountall” source package in Precise:
  Fix Committed
Status in “sbsigntool” source package in Precise:
  Invalid
Status in “linux” source package in Quantal:
  Fix Released
Status in “mountall” source package in Quantal:
  Fix Released
Status in “sbsigntool” source package in Quantal:
  Fix Released

Bug description:
  [Impact]
  This is needed for full hardware enablement of 12.04 on SecureBoot systems.  Without this change, management of the SecureBoot revocation database is not possible from Ubuntu userspace (at least, not out of the box).

  [Test Case]
  On EFI-enabled hardware:
  1. verify that /sys/firmware/efi/efivars is not mounted at boot time.
  2. install both linux-image-generic-lts-quantal and mountall from proposed.
  3. reboot.
  4. verify that /sys/firmware/efi/efivars is now mounted.

  [Regression potential]
  Minimal; as this uses mountall's notion of 'optional' filesystems, the filesystem will simply be skipped if the mountpoint does not exist or the filesystem is not supported by the running kernel.

  As of Linux 3.5, it is not possible to update the SecureBoot database
  from userspace because the sysfs implementation only supports variable
  data up to 1KB in size and this is exceeded by even a minimum key
  database of one key.

  Matt Fleming has accepted a patch from Matthew Garrett to add a new
  filesystem that supports larger variables.  Please consider
  backporting this (as an SRU) to both quantal and precise.

     https://lkml.org/lkml/2012/10/5/22

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