[Bug 1786491] [NEW] grub2 verify signed kernel exists or abort upgrade

[Julian Andres Klode]

Public bug reported:

[Impact]
grub2 should fail to install if no signed kernels exist

[Test case]
TODO

[Regression potential]
Upgrades can break.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: grub2-signed (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: grub2 (Ubuntu Bionic)
     Importance: Undecided
         Status: Triaged

** Affects: grub2-signed (Ubuntu Bionic)
     Importance: Undecided
         Status: Triaged

** Affects: grub2 (Ubuntu Cosmic)
     Importance: Undecided
         Status: Fix Released

** Affects: grub2-signed (Ubuntu Cosmic)
     Importance: Undecided
         Status: Fix Released

** Also affects: grub2-signed (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: grub2 (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: grub2-signed (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Also affects: grub2 (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: grub2-signed (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Changed in: grub2-signed (Ubuntu Cosmic)
       Status: New => Fix Released

** Changed in: grub2 (Ubuntu Cosmic)
       Status: New => Fix Released

** Changed in: grub2-signed (Ubuntu Bionic)
       Status: New => Triaged

** Changed in: grub2 (Ubuntu Bionic)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1786491

Title:
  grub2 verify signed kernel exists or abort upgrade

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2-signed package in Ubuntu:
  Fix Released
Status in grub2 source package in Bionic:
  Triaged
Status in grub2-signed source package in Bionic:
  Triaged
Status in grub2 source package in Cosmic:
  Fix Released
Status in grub2-signed source package in Cosmic:
  Fix Released

Bug description:
  [Impact]
  grub2 should fail to install if no signed kernels exist

  [Test case]
  TODO

  [Regression potential]
  Upgrades can break.

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