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From: Chris Wright <chrisw@osdl.org>
To: Con Kolivas <kernel@kolivas.org>
Cc: Arjan van de Ven <arjan@infradead.org>,
	linux kernel mailing list <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@elte.hu>, ck list <ck@vds.kolivas.org>
Subject: Re: [PATCH] Sample fix for hyperthread exploit
Date: Wed, 1 Jun 2005 10:25:05 -0700	[thread overview]
Message-ID: <20050601172505.GM23013@shell0.pdx.osdl.net> (raw)
In-Reply-To: <200506012213.25445.kernel@kolivas.org>

* Con Kolivas (kernel@kolivas.org) wrote:
> On Wed, 1 Jun 2005 22:06, Arjan van de Ven wrote:
> > > Comments?
> >
> > I don't think it's really worth it, but if you go this way I'd rather do
> > this via a prctl() so that apps can tell the kernel "I'd like to run
> > exclusive on a core". That'd be much better than blindly isolating all
> > applications.
> 
> I agree, and this is where we (could) implement the core isolation. I'm still 
> under the impression (as you appear to be) that this theoretical exploit is 
> not worth trying to work around.

Also, uid is not sufficient.  Something more comprehensive (like ability
to ptrace) would be appropriate.

thanks,
-chris

  reply	other threads:[~2005-06-01 17:25 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-06-01 11:58 Con Kolivas
2005-06-01 12:06 ` Arjan van de Ven
2005-06-01 12:13   ` Con Kolivas
2005-06-01 17:25     ` Chris Wright [this message]
2005-06-01 19:29       ` Arjan van de Ven
2005-06-02  2:49         ` Ingo Molnar
2005-06-02  2:57           ` Con Kolivas
2005-06-02  6:28           ` Amit Shah

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