linux-kernel - Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels

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Message-ID: <5370FC3F.30609@linux.intel.com>
Date:	Mon, 12 May 2014 09:52:15 -0700
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Josh Boyer <jwboyer@...oraproject.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Sven Joachim <svenjoac@....de>,
	Alexandre Julliard <julliard@...ehq.org>,
	Brian Gerst <brgerst@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	stable <stable@...r.kernel.org>, info@...altwit.be
Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit
 kernels

On 05/12/2014 06:16 AM, Josh Boyer wrote:
> On Wed, May 7, 2014 at 12:57 PM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
>> On Wed, May 7, 2014 at 2:18 AM, Sven Joachim <svenjoac@....de> wrote:
>>>
>>> It seems that at least some 32-bit programs are also broken, since after
>>> upgrading the kernel to 3.14.3 I can no longer start my old chess
>>> database program:
> 
> Now that this has hit 3.14.y stable, we have another report of this
> commit breaking something in Wine, this time MS Access 2000:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1096725 (reporter now CC'd)
> 
>> So for backporting (and for 3.15) maybe this (TOTALLY UNTESTED) patch
>> would be acceptable.
> 
> I don't think your patch went anywhere.  I have no idea if you want to
> push that or revert or just tell people to run old apps in 32-bit
> guests at this point.  Just forwarding on the information.
> 

Linus is off the net at the moment.  Someone needs to take his patch and
test it/clean it up.

	-hpa


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