[Bug 2089320] [NEW] Secure boot variables full, unable to boot

[Pedro Avalos]

Public bug reported:

Deploying 22.04 fills up the secure boot variable Forbidden Signatures.
The system is still able to boot, but there are warnings when booting.
However, deploying with 24.04 seems to fill the secure boot variable so
much that the Ubuntu install is unable to start.

This behavior was noticed when deploying through MAAS to a Supermicro -
SYS-6028U-TR4+
(https://www.supermicro.com/products/system/2u/6028/SYS-6028U-TR4_.cfm?parts=SHOW)
system.


This is the output I was able to capture from the terminal:

```
Could not create MokListTrustedRT: Volume full
Something has gone seriously wrong: import_mok_state() failed: Volume full
```

The error messages were similar to the ones found in this upstream
issue: https://github.com/rhboot/shim/issues/654.

** Affects: shim (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2089320

Title:
  Secure boot variables full, unable to boot

Status in shim package in Ubuntu:
  New

Bug description:
  Deploying 22.04 fills up the secure boot variable Forbidden
  Signatures. The system is still able to boot, but there are warnings
  when booting. However, deploying with 24.04 seems to fill the secure
  boot variable so much that the Ubuntu install is unable to start.

  This behavior was noticed when deploying through MAAS to a Supermicro
  - SYS-6028U-TR4+
  (https://www.supermicro.com/products/system/2u/6028/SYS-6028U-TR4_.cfm?parts=SHOW)
  system.

  
  This is the output I was able to capture from the terminal:

  ```
  Could not create MokListTrustedRT: Volume full
  Something has gone seriously wrong: import_mok_state() failed: Volume full
  ```

  The error messages were similar to the ones found in this upstream
  issue: https://github.com/rhboot/shim/issues/654.

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