Public bug reported:

[Impact]

KFENCE devs are changing CONFIG_KFENCE_STATIC_KEYS to be disabled by
default, because it's introducing more problems than benefits:

https://lore.kernel.org/all/[email protected]/T/#u

This also seems to trigger QEMU bugs during the systemd autopkgtest, like:
https://bugs.launchpad.net/qemu/+bug/1920934

[Test case]

Run systemd autopkgtest.

[Fix]

Disable CONFIG_KFENCE_STATIC_KEYS.

[Regression potential]

We may experience an overall performance regression for not using static
branches in the KFENCE code.

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

** Affects: linux (Ubuntu Jammy)
     Importance: Undecided
         Status: New

** Also affects: linux (Ubuntu Jammy)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1948038

Title:
  disable CONFIG_KFENCE_STATIC_KEYS in linux 5.15

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