It does work for AppImages, but it is weird in that they don't have an
install location, so that has to be adjusted for where they are placed
on the system, or we have to set a security xattr on the executable at
the time it is chmoded to +x

Admittedly orcaslicer doesn't use unprivileged user namespaces, but for
it works for an example of how to put one of these on it.

abi <abi/4.0>,
include <tunables/global>

profile orcaslicer /home/jj/Desktop/OrcaSlicer_Linux_V1.8.1.AppImage 
flags=(unconfined) {
  userns,

  # Site-specific additions and overrides. See local/README for details.
  include if exists <local/orcaslicer>
}


or we could make that looser by doing something like

abi <abi/4.0>,
include <tunables/global>

profile orcaslicer @{bin}/OrcaSlicer_Linux_V1.8.1.AppImage flags=(unconfined) {
  userns,

  # Site-specific additions and overrides. See local/README for details.
  include if exists <local/orcaslicer>
}


or by setting the security.apparmor label on the binary

sudo setfattr -h -n security.apparmor -v orcaslicer /PATH/TO/APPIMAGE

and doing


abi <abi/4.0>,
include <tunables/global>

profile orcaslicer xattrs=(security.apparmor=orcaslicer) flags=(unconfined) {
  userns,

  # Site-specific additions and overrides. See local/README for details.
  include if exists <local/orcaslicer>
}

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to apparmor in Ubuntu.
https://bugs.launchpad.net/bugs/2046844

Title:
  AppArmor user namespace creation restrictions cause many applications
  to crash with SIGTRAP

Status in apparmor package in Ubuntu:
  Confirmed
Status in digikam package in Ubuntu:
  Confirmed
Status in epiphany-browser package in Ubuntu:
  Confirmed
Status in falkon package in Ubuntu:
  Confirmed
Status in qutebrowser package in Ubuntu:
  Confirmed

Bug description:
  Hi, I run Ubuntu development branch 24.04 and I have a problem with
  Epiphany browser 45.1-1 (Gnome Web): program doesn't launch, and I get
  this error

  $ epiphany
  bwrap: Creating new namespace failed: Permission denied

  ** (epiphany:12085): ERROR **: 14:44:35.023: Failed to fully launch 
dbus-proxy: Le processus fils s’est terminé avec le code 1
  Trappe pour point d'arrêt et de trace (core dumped)

  $ epiphany
  bwrap: Creating new namespace failed: Permission denied

  ** (epiphany:30878): ERROR **: 22:22:26.926: Failed to fully launch 
dbus-proxy: Le processus fils s’est terminé avec le code 1
  Trappe pour point d'arrêt et de trace (core dumped)

  Thanks for your help!

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2046844/+subscriptions


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