[Bug 2045384] Re: AppArmor patch for mq-posix interface is missing in jammy

[Ubuntu Kernel Bot]

This bug is awaiting verification that the linux-nvidia-
tegra/5.15.0-1022.22 kernel in -proposed solves the problem. Please test
the kernel and update this bug with the results. If the problem is
solved, change the tag 'verification-needed-jammy-linux-nvidia-tegra' to
'verification-done-jammy-linux-nvidia-tegra'. If the problem still
exists, change the tag 'verification-needed-jammy-linux-nvidia-tegra' to
'verification-failed-jammy-linux-nvidia-tegra'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-jammy-linux-nvidia-tegra-v2 verification-needed-jammy-linux-nvidia-tegra

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https://bugs.launchpad.net/bugs/2045384

Title:
  AppArmor patch for mq-posix interface is missing in jammy

Status in linux package in Ubuntu:
  Triaged
Status in livecd-rootfs package in Ubuntu:
  New
Status in linux source package in Jammy:
  Fix Released
Status in livecd-rootfs source package in Jammy:
  New

Bug description:
  [ Impact ]

  mq-posix snapd interface does not work on Ubuntu Core 22. It results
  in permission denied even all interfaces are connected.

  Our brandstore customer is using posix message queue for IPC between
  snaps. They added mq-posix interface and connected them properly but
  getting permission denied error.

  The AppArmor patch for posix message queue created for other customer
  did not land in the standard jammy kernel.

  Userspace support for AppArmor message queue handling is already
  present in Ubuntu Core 22, it is just missing from the kernel.

  [ Test Plan ]

   * Create snaps using the posix-mq snapd interface on Ubuntu Core 22 or Classic 22.04 with the standard kernel.
   * Example snaps for testing: https://code.launchpad.net/~itrue/+git/mqtest-provider and https://code.launchpad.net/~itrue/+git/mqtest-client

  [ Where problems could occur ]

   * The patches already exist for 5.15 and have been used on other
  private customer kernels and all kernels released after 22.04, so
  there is already a good track record for this patchset and it
  shouldn't create any issues.

  [ Other Info ]
   
   * This is a time-sensitive issue for a paying customer

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