Ok, people from the apparmor mailing list explained that ENOPROTOOPT error is returned when the kernel doesn't have "fine grained unix mediation", and that it still hasn't been merged upstream, so it's a patch that has to be manually merged.
I prepared a patch.
Ok, people from the apparmor mailing list explained that ENOPROTOOPT error is returned when the kernel doesn't have "fine grained unix mediation", and that it still hasn't been merged upstream, so it's a patch that has to be manually merged.
I prepared a patch.