[Bug 2116199] Re: apparmor feature mismatch for 6.14 HWE kernel

[Timo Aaltonen]

Hello Bryan, or anyone else affected,

Accepted livecd-rootfs into plucky-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/livecd-
rootfs/25.04.27 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
plucky to verification-done-plucky. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-plucky. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: livecd-rootfs (Ubuntu Plucky)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-plucky

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https://bugs.launchpad.net/bugs/2116199

Title:
  apparmor feature mismatch for 6.14 HWE kernel

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Noble:
  Fix Committed
Status in livecd-rootfs source package in Oracular:
  Won't Fix
Status in livecd-rootfs source package in Plucky:
  Fix Committed
Status in livecd-rootfs source package in Questing:
  Fix Released

Bug description:
  Preseeding with the HWE 6.14 kernel fails due to AppArmor feature
  mismatch.

  [ Impact ]

  When building Ubuntu images with the HWE 6.14 kernel using livecd-
  rootfs, snap preseeding fails since there is a mismatch between the
  kernel's AppArmor capabilities and the capabilities listed in livecd-
  rootfs. As a result, these images have slower boot times as snaps are
  being seeded at first boot instead of image creation.

  [ Test Plan ]

  * Build an image with livecd-rootfs
  * Register the image on the cloud
  * Boot into the image
  * Check that "snap debug seeding" output doesn't contain the "seed-restart-system-key" key. Otherwise, check the `seed-restart-system-key` to see what features are missing.

  [ Where problems could occur ]

  The risk of regressions is minimal since we have previously backported
  similar changes a couple of times, and there should not be any runtime
  changes for end-users. One potential problem is if the proposed
  changes do not properly rectify the mismatch in the AppArmor features,
  which will cause the slow boot times to remain.

  [ Other Info ]
  * This bug affects both Noble and Questing
  * a similar SRU we did already is https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/2037567

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