From: Ian Campbell <ijc@hellion.org.uk>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Brian Gerst <brgerst@gmail.com>,
Christian Kujau <lists@nerdbynature.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Jeremy Fitzhardinge <jeremy@goop.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.33-rc2: Xen/Guest switching to user mode with no user page tables
Date: Sun, 10 Jan 2010 14:05:35 +0000 [thread overview]
Message-ID: <1263132335.2393.76.camel@cthulhu.hellion.org.uk> (raw)
In-Reply-To: <20100110134951.GD5189@lenovo>
On Sun, 2010-01-10 at 16:49 +0300, Cyrill Gorcunov wrote:
> On Sun, Jan 10, 2010 at 04:36:28PM +0300, Cyrill Gorcunov wrote:
> ...
> > >
> > > With just the CS RPL fix below I see a GPF at kernel_thread_helper with
> > > SS=3 (hence my hypothesis about NULL selectors and non-zero RPL above).
> > > With both the SS and CS fixes things work fine.
> >
> > any of CS,SS loaded with NULL descriptor should lead to #GP
> >
>
> though SS with RPL=0 is allowed to be NULL descriptor in 64bit mode
yes, that's what I meant.
Ian.
--
Ian Campbell
Tussman's Law:
Nothing is as inevitable as a mistake whose time has come.
next prev parent reply other threads:[~2010-01-10 14:11 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-06 1:03 Christian Kujau
2010-01-06 3:38 ` Jeremy Fitzhardinge
2010-01-06 3:48 ` Christian Kujau
2010-01-06 5:14 ` Jeremy Fitzhardinge
2010-01-06 11:06 ` Christian Kujau
2010-01-06 11:21 ` Cyrill Gorcunov
2010-01-06 12:43 ` Christian Kujau
2010-01-07 19:06 ` Christian Kujau
2010-01-07 19:20 ` Cyrill Gorcunov
2010-01-07 19:31 ` Christian Kujau
2010-01-07 19:34 ` Cyrill Gorcunov
2010-01-07 19:19 ` H. Peter Anvin
2010-01-07 19:30 ` Christian Kujau
2010-01-08 21:50 ` Cyrill Gorcunov
2010-01-09 23:55 ` Christian Kujau
2010-01-10 1:50 ` Brian Gerst
2010-01-10 8:09 ` Cyrill Gorcunov
2010-01-10 12:59 ` Ian Campbell
2010-01-10 13:36 ` Cyrill Gorcunov
2010-01-10 13:49 ` Cyrill Gorcunov
2010-01-10 14:05 ` Ian Campbell [this message]
2010-01-15 8:36 ` Christian Kujau
2010-01-15 11:29 ` Ian Campbell
2010-01-15 12:03 ` Cyrill Gorcunov
2010-01-15 12:00 ` Cyrill Gorcunov
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