CBlog

There is this old quote from LKML:

Get back there in front of the computer NOW. Christmas can wait.
[Linus "the Grinch" Torvalds, 24 Dec 2000 on linux-kernel]

The AppArmor developers followed this advise - John released AppArmor 2.12 yesterday (Dec 25), and I just submitted updated packages to openSUSE Tumbleweed (SR 560017).

The most visible changes in 2.12 are support for "owner" rules in aa-logprof and upstreaming of the aa-logprof --json interface (used by YaST). Of course that's only the tip of the christmas cookie ;-) - see the Release Notes for all details.

One important change in the openSUSE packages is that I intentionally broke "systemctl stop apparmor". The reason for this is "systemctl restart apparmor" - systemd maps this to stop, followed by start. This resulted in unloading all AppArmor profiles by the "stop" part and, even if they get loaded again a second later, running processes will stay unconfined unless you restart them. The systemd developers were unwilling to implement the proposed ExecRestart= option for unit files, therefore breaking "stop" is the best thing I can do. (See boo#996520 and boo#853019 for more details.)

"systemctl reload apparmor" will continue to work and is still the recommended way to reload the AppArmor profiles, but accidently typing "restart" instead of "reload" can easily happen. Therefore I chose to break "stop" - that's annoying, but more secure than accidently removing the AppArmor confinement from running processes.

If you really want to unload all AppArmor profiles, you can use the new "aa-teardown" command which does what "systemctl stop apparmor" did before - but who would do that? ;-)

Note that the above (except the recommendation to use "reload") only applies to Tumbleweed and Leap 15.