Public bug reported:

To support the use of AppArmor policies that specify features like
userns, add the new 4.0 ABI from upstream
https://gitlab.com/apparmor/apparmor/-/merge_requests/1061.

Note this should not be enabled by default (as the existing AppArmor
profiles have not been updated to account for this) but it will allow
easier testing of profiles that want to support this new ABI.

Also note this ABI is identical to that provided by the kernel in mantic
and lunar currently:

# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu Mantic Minotaur (development branch)
Release:        23.10
Codename:       mantic
# uname -a
Linux sec-mantic-amd64 6.3.0-7-generic #7-Ubuntu SMP PREEMPT_DYNAMIC Thu Jun  8 
16:02:30 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
# diff /etc/apparmor.d/abi/4.0 <(aa-features-abi -x)
# md5sum /etc/apparmor.d/abi/4.0 <(aa-features-abi -x)
f17b0a97806d733b5b884d8a1c2fea37  /etc/apparmor.d/abi/4.0
f17b0a97806d733b5b884d8a1c2fea37  /dev/fd/63

** Affects: apparmor (Ubuntu)
     Importance: Undecided
     Assignee: Alex Murray (alexmurray)
         Status: New

** Affects: apparmor (Ubuntu Mantic)
     Importance: Undecided
     Assignee: Alex Murray (alexmurray)
         Status: New

** Changed in: apparmor (Ubuntu)
     Assignee: (unassigned) => Alex Murray (alexmurray)

** Also affects: apparmor (Ubuntu Mantic)
   Importance: Undecided
     Assignee: Alex Murray (alexmurray)
       Status: New

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https://bugs.launchpad.net/bugs/2026227

Title:
  Backport 4.0 ABI for AppArmor 3 in mantic

Status in apparmor package in Ubuntu:
  New
Status in apparmor source package in Mantic:
  New

Bug description:
  To support the use of AppArmor policies that specify features like
  userns, add the new 4.0 ABI from upstream
  https://gitlab.com/apparmor/apparmor/-/merge_requests/1061.

  Note this should not be enabled by default (as the existing AppArmor
  profiles have not been updated to account for this) but it will allow
  easier testing of profiles that want to support this new ABI.

  Also note this ABI is identical to that provided by the kernel in
  mantic and lunar currently:

  # lsb_release -a
  No LSB modules are available.
  Distributor ID:       Ubuntu
  Description:  Ubuntu Mantic Minotaur (development branch)
  Release:      23.10
  Codename:     mantic
  # uname -a
  Linux sec-mantic-amd64 6.3.0-7-generic #7-Ubuntu SMP PREEMPT_DYNAMIC Thu Jun  
8 16:02:30 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
  # diff /etc/apparmor.d/abi/4.0 <(aa-features-abi -x)
  # md5sum /etc/apparmor.d/abi/4.0 <(aa-features-abi -x)
  f17b0a97806d733b5b884d8a1c2fea37  /etc/apparmor.d/abi/4.0
  f17b0a97806d733b5b884d8a1c2fea37  /dev/fd/63

To manage notifications about this bug go to:
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