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

[Launchpad Bug Tracker]

This bug was fixed in the package shim - 15.4-0ubuntu5

---------------
shim (15.4-0ubuntu5) hirsute; urgency=medium

  * Rebuild in hirsute to get a more stable target to keep shim reproducible
    for a longer time.

shim (15.4-0ubuntu3) impish; urgency=medium

  [ Steve Langasek ]
  * Use -Zxz compression, for compatibility with dpkg in older releases.
    LP: #1925673

  [ Julian Andres Klode ]
  * Stop addending vendor dbx to MokListXRT during MokListX mirroring. This
    is causing systems to run out of EFI storage space, or just hang up
    when trying to write it (LP: #1924605) (LP: #1928434)
  * Further relax the check for variable mirroring on non-secureboot systems
    avoiding boot failures on out of space conditons (pull request #372)

  [ Seth Forshee ]
  * Don't unhook ExitBootServices() when EBS protection is disabled (LP: #1931136)
    (pull request #378)

 -- Julian Andres Klode <juliank at ubuntu.com>  Wed, 16 Jun 2021 12:52:45
+0200

** Changed in: shim (Ubuntu)
       Status: Fix Committed => Fix Released

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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

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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