From: "Ahmed S. Darwish" <darwish.07@gmail.com>
To: Casey Schaufler <casey@schaufler-ca.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Stephen Smalley <sds@tycho.nsa.gov>,
James Morris <jmorris@namei.org>,
Eric Paris <eparis@parisplace.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH BUGFIX -rc3] Smack: Don't register smackfs if we're not loaded
Date: Wed, 5 Mar 2008 14:44:45 +0200
Message-ID: <20080305124445.GA19549@ubuntu> (raw)
In-Reply-To: <521493.30745.qm@web36606.mail.mud.yahoo.com>
On Tue, Mar 04, 2008 at 09:45:04AM -0800, Casey Schaufler wrote:
> ----- Original Message ----
> > From: Linus Torvalds <torvalds@linux-foundation.org>
> > To: Ahmed S. Darwish <darwish.07@gmail.com>
> > Cc: Casey Schaufler <casey@schaufler-ca.com>; LKML <linux-kernel@vger.kernel.org>
> > Sent: Tuesday, March 4, 2008 9:21:19 AM
> > Subject: Re: [PATCH BUGFIX -rc3] Smack: Don't register smackfs if we're not loaded
> >
> >
> >
> > On Tue, 4 Mar 2008, Ahmed S. Darwish wrote:
> > >
> > > Smackfs initialization without an enabled Smack leads to
> > > an early Oops that renders the system unusable.
> >
> > I really think this is bogus. Global enables like this are just wrong, and
> > a sign that something else bad is going on.
> >
> > What is the oops? Why does it happen?
...
>
> One solution would be to tighten the smackfs code so that it
> handles the uninitialized LSM case properly.
>
IMHO no smackfs code should ever execute if smack isn't loaded.
This means catching it from the very fist step where it registers
itself in init_smk_fs instead of doing several if(we're enabled) cases
in the code path.
The solution should be a _general_ solution, _not_ a SMACK one cause
SELinux sufferes from exactly the same problem.
a.k.a:
LSMs need a scalable way to know if they're enabled that makes
everyone happy ( especially Linus ;) ).
Regads to all,
--
"Better to light a candle, than curse the darkness"
Ahmed S. Darwish
Homepage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com
next prev parent reply index
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-04 17:45 Casey Schaufler
2008-03-04 18:12 ` Linus Torvalds
2008-03-05 0:58 ` James Morris
2008-03-05 12:12 ` Ahmed S. Darwish
2008-03-05 12:44 ` Ahmed S. Darwish [this message]
2008-03-05 12:51 ` Ahmed S. Darwish
-- strict thread matches above, loose matches on Subject: below --
2008-03-04 16:42 Casey Schaufler
2008-03-04 13:10 Ahmed S. Darwish
2008-03-04 17:21 ` Linus Torvalds
2008-03-04 18:24 ` Ahmed S. Darwish
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