Public bug reported:
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
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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:
New
Status in linux source package in Mantic:
New
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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