[lxc-devel] CGroup Namespaces (v4)
Serge E. Hallyn
serge at hallyn.com
Tue Nov 17 03:54:58 UTC 2015
On Mon, Nov 16, 2015 at 07:40:26PM -0600, Serge E. Hallyn wrote:
> On Mon, Nov 16, 2015 at 07:13:49PM -0600, Serge E. Hallyn wrote:
> > On Mon, Nov 16, 2015 at 04:24:27PM -0600, Eric W. Biederman wrote:
...
> > > Similary have you considered what it required to be able to safely set
> > > FS_USERNS_MOUNT?
> >
> > I think the only thing we need to do is
> >
> > 1. go through and make sure that any ability to change mount flags is under
> > capable() (which I have not yet done). The cgroup_mount() itself checks that
> > flags are not changed, but there may be some subtle way to effect a change
> > that I'm not aware of yet.
> >
>
> At least the ability to change the clone_children and release agent through
> remount need to be restricted to init_user_ns root.
No, they can only be changed on a new mount, so these are fine.
More information about the lxc-devel
mailing list