Ok, I've tried it with only this change to /etc/apparmor.d/fusermount3 and Flatpak is working:
root@cube:/etc/apparmor.d# diff fusermount3 ~/fusermount3 11d10 < /run/mount/utab.lock rwk, The Logs are: Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.690:299): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110534 comm="fusermount3" capability=1 capname="dac_override" Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.690:300): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110534 comm="fusermount3" capability=7 capname="setuid" Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.690:301): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110535 comm="fusermount3" capability=7 capname="setuid" Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.813:302): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110546 comm="fusermount3" capability=1 capname="dac_override" Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.813:303): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110546 comm="fusermount3" capability=7 capname="setuid" Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.813:304): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110547 comm="fusermount3" capability=7 capname="setuid" Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.814:305): apparmor="DENIED" operation="mknod" class="file" profile="fusermount3" name="/run/mount/utab.act" pid=110547 comm="umount" requested_mask="c" denied_mask="c" fsuid=0 ouid=0 Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.814:306): apparmor="DENIED" operation="open" class="file" profile="fusermount3" name="/run/mount/utab" pid=110547 comm="umount" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.814:307): apparmor="DENIED" operation="open" class="file" profile="fusermount3" name="/run/mount/utab.event" pid=110547 comm="umount" requested_mask="wc" denied_mask="wc" fsuid=0 ouid=0 Sep 27 07:45:38 cube kernel: audit: type=1400 audit(1758923138.936:308): apparmor="DENIED" operation="capable" class="cap" profile="fusermount3" pid=110557 comm="fusermount3" capability=1 capname="dac_override" -- 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/2122161 Title: error: Failed to install org.gnome.Platform: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak- cache-4EB3B3/org.gnome.Platform-EM6KC3: Child process exited with code 1 Status in apparmor package in Ubuntu: Confirmed Status in flatpak package in Ubuntu: Confirmed Bug description: hi i am a bug tester and wanted to install a program but then i got this error here is my full log: Warning: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-4EB3B3/org.freedesktop.Platform.GL.default-FAB3B3: Child process exited with code 1 Warning: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-4EB3B3/org.freedesktop.Platform.GL.default-K8HAC3: Child process exited with code 1 Warning: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-4EB3B3/org.freedesktop.Platform.openh264-D0P4B3: Child process exited with code 1 Warning: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-4EB3B3/org.gnome.Platform.Locale-QP83B3: Child process exited with code 1 Warning: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-4EB3B3/org.gtk.Gtk3theme.Yaru-dark-M2N7B3: Child process exited with code 1 error: Failed to install org.gnome.Platform: Could not unmount revokefs-fuse filesystem at /var/tmp/flatpak-cache-4EB3B3/org.gnome.Platform-EM6KC3: Child process exited with code 1 ProblemType: Bug DistroRelease: Ubuntu 25.10 Package: flatpak 1.16.1-2ubuntu1 ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3 Uname: Linux 6.17.0-3-generic x86_64 NonfreeKernelModules: zfs ApportVersion: 2.33.1-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri Sep 5 20:07:19 2025 InstallationDate: Installed on 2025-09-04 (1 days ago) InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Daily amd64 (20250903) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: flatpak UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2122161/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
