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

[Launchpad Bug Tracker]

This bug was fixed in the package livecd-rootfs - 25.10.15

---------------
livecd-rootfs (25.10.15) questing; urgency=medium

  * Add missing components to 6.14 kernel apparmor features' preseeds.
    (LP: #2116199)

 -- Bryan Alexander <bryan.alexander at canonical.com>  Thu, 17 Jul 2025
13:27:17 -0700

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

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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:
  In Progress
Status in livecd-rootfs source package in Oracular:
  Won't Fix
Status in livecd-rootfs source package in Plucky:
  In Progress
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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