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

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Message-ID: <CA+5PVA4i1Qu_Hbz4npMCo10KdjUWTtvS4=GmYmdiMHSO8QZp2Q@mail.gmail.com>
Date:	Mon, 12 May 2014 09:16:08 -0400
From:	Josh Boyer <jwboyer@...oraproject.org>
To:	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>,
	"H. Peter Anvin" <hpa@...ux.intel.com>, info@...altwit.be
Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on
 64-bit kernels

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.

josh
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