[Bug 1931136] Please test proposed package

[Steve Langasek]

Hello Julian, or anyone else affected,

Accepted shim-signed into hirsute-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/shim-
signed/1.48 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-
hirsute to verification-done-hirsute. If it does not fix the bug for
you, please add a comment stating that, and change the tag to
verification-failed-hirsute. 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.

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https://bugs.launchpad.net/bugs/1931136

Title:
  Don't unhook ExitBootServices() when EBS protection is disabled

Status in shim package in Ubuntu:
  Fix Released
Status in shim source package in Hirsute:
  Fix Committed

Bug description:
  [Impact]
  This is a regression in shim 15.4 that causes a crash in shim when chainbooting.

  Also, the machine resets when you exit grub, rather than going back to
  the EFI shell when launched from it.

  [Test plan]

  TODO for the chainboot, something similar to
  https://github.com/lxc/lxd/issues/8770

  For grub exit, we can easily launch VM and then EFI shell and then
  load shim from in there, type exit in grub and should be back to EFI
  shell.

  [Where problems could occur]
  In exiting shim, failure to boot, etc.

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