Issue after the last update (14.0)

[Banhogato]

Got this in my terminal after updating it today (18/11/2024):

AppArmor parser error for /etc/apparmor.d/mullvad-browser in profile /etc/apparm
or.d/mullvad-browser at line 6: Could not open 'abi/4.0': inexistent file or directory

I'm using the APT repository for Debian.

[golden-hippo-42]

Yes, I also get this issue using Debian stable.

It appears to be the apparmor version on Debian isn't the most recent version. On Debian it's on the major version of 3, where as this profile is for version 4 which released about 7 months ago. Also version 4 isn't available in Debian Sid either.

As Debian Bookworm was released in June 2023, I won't expect this to be present until the next stable version at the least sometime mid 2025, due to the feature freezes.

Also this results in the SystemD Apparmor service failing.

[golden-hippo-42]

Linked issues on the Tor Project Gitlab for reference:
https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41243
https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/merge_requests/1070

[ruihildt]

I can confirm I could reproduce this in a Debian 12.8 VM.

Also this results in the SystemD Apparmor service failing.

Since I'm not very familiar with Apparmor, how does that manifest and what is the impact from a user perspective?

[boklm]

Since the AppArmor profile is not useful on Debian stable (it's only useful starting with Ubuntu 24.04 to enable user namespaces), you can remove `/etc/apparmor.d/mullvad-browser` as a workaround. I've opened https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41311.