Re: [PATCH] [request for inclusion] Realtime LSM

Chris Wright
2005-01-11T23:13:31Z

* Paul Davis (paul@linuxaudiosystems.com) wrote:
> >On Tue, Jan 11, 2005 at 04:38:14PM -0500, Lee Revell wrote:
> >> Yes but a bug in an app running as root can trash the filesystem. The
> >> worst you can do with RT privileges is lock up the machine.
> >
> >several filesystem and IO threads run at prio -10 but not RT.
> >That makes me a bit less sure of your statement....
>
> Its completely orthogonal. Lee didn't say "tasks running without RT
> can't mess up filesystems". He said "tasks running as root can trash
> the filesystem" and "tasks running as RT can lock up the
> machine". obviously, the intersection point (a root, RT task) is
> double trouble.

This is straying from the core issue... But, Arjan's saying that an RT
(non-root) task could trash the filesystem if it deadlocks the machine
(because those important fs and IO threads don't run).

thanks,
-chris
--
Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net