Andreas, you are right that this is related to LP: #2121552. I'll try to explain:
This is a unix operation, and as Seth mentioned, we crosscheck -at the same time- if 1. sender is allowed to send to receiver 2. receiver is allowed to receive from sender That's why unix rules have a peer component to them: unix (receive) peer=(label=unconfined), This rule is included in abstractions/base, so rsyslog is allowed to receive unix sockets from unconfined, which is the case here. There's another detail though: since this is a named unix socket, AppArmor also does a filesystem check using file rules. That's the denial we are seeing due to the bug in 2121552. Since systemd-journald (owner of the unix socket and unconfined) is running in the container in a (apparmor) virtualized stack, rsyslog is not being allowed delegation of the unconfined fd by default as expected. This will require a kernel fix for a permanent solution. Meanwhile, /run/systemd/journal/dev-log r, in rsyslog should allow it. -- 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/2123821 Title: bad restriction: apparmor="DENIED" [...] namespace="root//lxd-n_<var- snap-lxd-common-lxd>" profile="rsyslogd" name="/run/systemd/journal/dev-log" Status in apparmor package in Ubuntu: New Status in rsyslog package in Ubuntu: Confirmed Bug description: On my Questing system running LXD containers, my kernel log is full of messages like: [ 129.551382] audit: type=1400 audit(1757925628.229:1005): apparmor="DENIED" operation="sendmsg" class="file" namespace="root//lxd-q_<var-snap-lxd-common-lxd>" profile="rsyslogd" name="/run/systemd/journal/dev-log" pid=5370 comm="systemd-journal" requested_mask="r" denied_mask="r" fsuid=1000000 ouid=1000000 One of my containers is named "q", hence the "root//lxd-q...". Some actual functionality is likely broken in the container. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/2123821/+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
