[Bug 1900774] Re: [arm64] EFI stub: ERROR: FIRMWARE BUG: efi_loaded_image_t::image_base has bogus value

[Łukasz Zemczak]

Hello dann, or anyone else affected,

Accepted grub2 into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/grub2/2.02~beta2-36ubuntu3.29 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
xenial to verification-done-xenial. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-xenial. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: grub2 (Ubuntu Xenial)
       Status: New => Fix Committed

** Tags added: verification-needed-xenial

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https://bugs.launchpad.net/bugs/1900774

Title:
  [arm64] EFI stub: ERROR: FIRMWARE BUG: efi_loaded_image_t::image_base
  has bogus value

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2 source package in Xenial:
  Fix Committed
Status in grub2 source package in Bionic:
  Fix Committed
Status in grub2 source package in Focal:
  Fix Committed
Status in grub2 source package in Groovy:
  Fix Committed
Status in grub2 source package in Hirsute:
  Fix Released

Bug description:
  [Impact]
  When booting a kernel >= 5.7 via GRUB on an arm64 server, the EFI stub falsely reports a firmware bug:

  EFI stub: Booting Linux Kernel...
  EFI stub: EFI_RNG_PROTOCOL unavailable, no randomness supplied
  EFI stub: ERROR: FIRMWARE BUG: efi_loaded_image_t::image_base has bogus value
  EFI stub: Using DTB from configuration table
  EFI stub: Exiting boot services and installing virtual address map...
  [    0.000000] Booting Linux on physical CPU 0x0000000000 [0x431f0a10]

  [Test Case]
  Boot the arm64 groovy kernel, or any other kernel >= 5.7.
  Regression test on an EFI based x86 system (e.g. lxc --vm)

  [Fix]
  https://github.com/rhboot/grub2/commit/1d5ef08216edec4d31d0e10cfdb30b5ebfef7a45

  [Where Problems Could Occur]
  The fix is in GRUB's EFI loader, so problems would likely appear early in the boot of the kernel (during EFI stub processing).

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