[Bug 1604499] Re: include loopback and squash4 modules in EFI binary

[Steve Langasek]

** Changed in: grub2 (Ubuntu)
   Importance: Undecided => Critical

** Also affects: grub2 (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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Title:
  include loopback and squash4 modules in EFI binary

Status in grub2 package in Ubuntu:
  New
Status in grub2 source package in Xenial:
  New

Bug description:
  Development versions of snappy Ubuntu Core leverage grub's squashfs
  support to load kernels and initramfs directly from the kernel snap
  (which is a squashfs-format archive).  This requires the loopback and
  the squash4 grub modules to be loaded.

  Currently, neither of these modules is included in the signed EFI
  binaries, therefore this boot strategy is not compatible with
  SecureBoot.

  We should verify that the loopback and squash4 modules are suitable
  for inclusion in the signed binary, and include them.

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