[Bug 1595312] Re: GRUB crashes on loading multiboot2 kernel

[Safayet Ahmed]

I pulled and built 2.02~beta3 and can confirm that the bug described
above no longer exists with the newer version of open-source GRUB.

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Title:
  GRUB crashes on loading multiboot2 kernel

Status in grub2 package in Ubuntu:
  New

Bug description:
  1) lsb_release -rd
  Description:	Ubuntu 14.04.4 LTS
  Release:	14.04

  2) apt-cache policy grub-common
  grub-common:
    Installed: 2.02~beta2-9ubuntu1.7
    Candidate: 2.02~beta2-9ubuntu1.7
    Version table:
   *** 2.02~beta2-9ubuntu1.7 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       2.02~beta2-9ubuntu1.6 0
          500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
       2.02~beta2-9 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  3) I attempted to boot a customized version of tboot in a UEFI
  environment (using the multiboot2 command) I expected the system to
  boot as usual.

  4) GRUB displayed the message that it was loading tboot and never went
  further.

  5) Further Details:

  After GRUB crashed, I set the "debug" environment variable to "all" in
  the GRUB configuration file and I tracked the problem to functions in
  "grub-core/lib/relocator.c" in the source.

  This bug was reported in the main GRUB repo:
  http://savannah.gnu.org/bugs/?41655

  The fix for this was posted back in 2014:
  http://git.savannah.gnu.org/cgit/grub.git/commit/?id=46b74dd3cbb3a97a7abeb7f0464de548006e0e3d

  I checked the GRUB source obtained through apt-get source and can
  confirm that the fix listed above was not integrated into Ubuntu's
  version of GRUB.

  Note: This fix was a part of the changes for 2.02-beta3 (released in
  February 2016). Ubuntu is currently running 2.02-beta2 (even for the
  newest Ubuntu releases).

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