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

[Brian Murray]

This is Fix Committed for xenial but I can't add a xenial task. :-(

** Changed in: shim-signed (Ubuntu)
       Status: New => Fix Committed

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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 Committed
Status in shim source package in Xenial:
  Fix Committed
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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