[Bug 1080521] [NEW] Assignment gnub_mm_base = NULL in relocator.c causes boot hang

[Aaron Haviland]

Public bug reported:

The statement in grub-core/lib/relocator.c:591:
     grub_mm_base = NULL;
causes my system to lock-up when booting in EFI mode. I have determined this through liberal placement of grub_dprintf's, and eventually by commenting out the offending line.

By commenting this line out, I am able to progress further in the boot
sequence.

At this point, I am still unable to boot in EFI mode, however, I'm not
sure whether this part is due to grub, or linux: it occurs much closer
to the hand-off, and I have yet to determine whether it's related to
this bug, or not.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: grub-efi-amd64 2.00-7ubuntu11
ProcVersionSignature:
 
Uname: Linux 3.7.0-rc4 x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Sun Nov 18 20:44:19 2012
MarkForUpload: True
ProcEnviron:
 TERM=screen-bce
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug quantal third-party-packages

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https://bugs.launchpad.net/bugs/1080521

Title:
  Assignment gnub_mm_base = NULL in relocator.c causes boot hang

Status in “grub2” package in Ubuntu:
  New

Bug description:
  The statement in grub-core/lib/relocator.c:591:
       grub_mm_base = NULL;
  causes my system to lock-up when booting in EFI mode. I have determined this through liberal placement of grub_dprintf's, and eventually by commenting out the offending line.

  By commenting this line out, I am able to progress further in the boot
  sequence.

  At this point, I am still unable to boot in EFI mode, however, I'm not
  sure whether this part is due to grub, or linux: it occurs much closer
  to the hand-off, and I have yet to determine whether it's related to
  this bug, or not.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: grub-efi-amd64 2.00-7ubuntu11
  ProcVersionSignature:
   
  Uname: Linux 3.7.0-rc4 x86_64
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  Date: Sun Nov 18 20:44:19 2012
  MarkForUpload: True
  ProcEnviron:
   TERM=screen-bce
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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