[Bug 1997795] Re: grub-multi-install offers wrong devices as ESP

[Steve Langasek]

Hello Julian, or anyone else affected,

Accepted grub2 into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/grub2/2.04-1ubuntu26.16 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-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. 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 Focal)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1997795

Title:
  grub-multi-install offers wrong devices as ESP

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2 source package in Focal:
  Fix Committed

Bug description:
  [Impact]
  grub-multi-install offers the wrong device as ESP if a previous partition was recognized, because it does not correctly reset state between loop iterations, causing people to be offered e.g. the entire disk device as an ESP, and then install to obviously fail.

  [Test plan]
  Launch a lxd VM, run
   dpkg-reconfigure shim-signed

  check that only the ESP appears.

  Before the update, /dev/sda itself would appear as well.

  [Where problems could occur]
  Most importantly, some firmware are less restrictive about ESPs than grub-multi-install is, and if we previously accidentally "recognized" the partition as an ESP and now no longer do, grub does not get updated.

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