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

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Message-ID: <20140412193541.GA30697@pd.tnic>
Date:	Sat, 12 Apr 2014 21:35:41 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Brian Gerst <brgerst@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	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>
Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on
 64-bit kernels

On Sat, Apr 12, 2014 at 10:18:25AM -0700, H. Peter Anvin wrote:
> So Wine regressed and noone noticed? They doesn't sound like an active
> user base.

Btw, wouldn't this obscure use case simply work in a KVM guest with a
kernel <= 3.14?

Because if so, we simply cut it at 3.14, everything newer has the leak
fix and people who still want to play phone games on a x86 machine, can
do so in a guest with an older kernel. Everybody's happy.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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