linux-kernel - Re: [BUG] broken ebba638ae723d8a8fc2f7abce5ec18b688b791d7

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Message-ID: <4D475D6B.4030508@zytor.com>
Date:	Mon, 31 Jan 2011 17:10:03 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Kees Cook <kees.cook@...onical.com>
CC:	matthieu castet <castet.matthieu@...e.fr>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [BUG] broken ebba638ae723d8a8fc2f7abce5ec18b688b791d7

On 01/31/2011 03:52 PM, Kees Cook wrote:
>
> This worked, thanks! If this tests cleanly for you in qemu, we should get
> this committed.
>

This is wrong for at least one reason; possibly two:

a) it ignores the control to not reload the segment registers (not sure 
if anything still uses them, but...)

b) I'm not sure that init_thread_union is safe for the non-BSP CPU here.

	-hpa
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