This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 2040194
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Mantic)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2040194
Title:
apparmor restricts read access of user namespace mediation sysctls to
root
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Mantic:
Incomplete
Bug description:
lxc and lxd currently need to determine if the apparmor restriction
on unprivileged user namespaces are being enforced, so that apparmor
restrictions won't break lxc/d, and they won't clutter the logs
by doing something like
unshare true
to test if the restrictions are being enforced.
Ideally access to this information would be restricted so that any
unknown access would be logged, but lxc/d currently aren't ready for
this so in order to _not_ force lxc/d to probe whether enforcement is
enabled, open up read access to the sysctls for unprivileged user
namespace mediation.
https://github.com/canonical/lxd/issues/11920#issuecomment-1756110109
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