[Bug 1931136] Re: Don't unhook ExitBootServices() when EBS protection is disabled

[Łukasz Zemczak]

Hello Julian, or anyone else affected,

Accepted shim-signed into bionic-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/shim-
signed/1.37~18.04.9 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-
bionic to verification-done-bionic. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-bionic. 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: shim-signed (Ubuntu Bionic)
       Status: New => Fix Committed

** Tags added: verification-needed-bionic

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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-signed package in Ubuntu:
  Fix Released
Status in shim source package in Xenial:
  Fix Committed
Status in shim-signed source package in Bionic:
  Fix Committed
Status in shim source package in Focal:
  Fix Committed
Status in shim-signed source package in Focal:
  Fix Committed
Status in shim source package in Hirsute:
  Fix Released

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]

  Boot an Ubuntu hirsute image in Secure Boot mode. While this issue was
  originally seen while chainbooting in
  https://github.com/lxc/lxd/issues/8770 - it was shown to be also
  reproducible just by booting a hirsute instance.

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

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