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-- 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: [SRU] 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 Flatpak: Fix Released Status in Release Notes for Ubuntu: Fix Released Status in apparmor package in Ubuntu: Confirmed Status in flatpak package in Ubuntu: Confirmed Status in apparmor source package in Questing: Fix Released Bug description: [ Impact ] fusermount3 (and umount, which is invoked by it with the same confinement) on the current Ubuntu Questing requires additional privileges in order to work properly. In particular, the lack of these privileges broke flatpak because it was newly no longer able to unmount revokefs-fuse. (This is a distinct failure from a previous one reported at LP: #2100295.) [ Test Plan ] On a Questing machine, - Install flatpak following the instructions at https://flathub.org/en/setup/Ubuntu: - `sudo apt install flatpak` - `flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo - Reboot - Attempt to install a flatpak, e.g. `flatpak install flathub com.github.huluti.Coulr` - If installation is successful, attempt to run the flatpak with `flatpak run com.github.huluti.Coulr` - Without the fix: - The flatpak installation fails and generates error messages about being unable to unmount revokefs-fuse - AppArmor generates denial logs relating to file accesses in /run/mount/utab and related files /run/mount/utab.* - With the fix: the installation succeeds - AppArmor still generates denial logs relating to denials of the DAC_OVERRIDE and SETUID capabilities. However, as flatpak still seems to work properly even with these capabilities denied, we do not grant fusermount3 these capabilities [ Where problems could occur ] The additions to the fusermount3 profile are loosening confinement. However, if a user manually modified the installed profiles, then the package upgrade would cause conflicts, and rejection of the incoming changes (either by hand during an interactive upgrade or automatically during an batch unattended upgrade) would result in end users not getting the packaged fix. [ Other Info ] Original bug report: 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/flatpak/+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
