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

[Chris Wright]

* Paul Davis (paul@xxxxxxxxxxxxxxxxxxxxx) 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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/