linux-kernel - Re: [PATCH] x86-64, espfix: Don't leak bits 31:16 of %esp returning to 16-bit stack

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Message-ID: <536131F4.3040509@zytor.com>
Date:	Wed, 30 Apr 2014 10:25:08 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Lutomriski <amluto@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dirk Hohndel <dirk@...ndel.org>,
	Arjan van de Ven <arjan.van.de.ven@...el.com>,
	comex <comexk@...il.com>,
	Alexander van Heukelum <heukelum@...tmail.fm>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH] x86-64, espfix: Don't leak bits 31:16 of %esp returning
 to 16-bit stack

On 04/30/2014 10:16 AM, Borislav Petkov wrote:
> On Wed, Apr 30, 2014 at 09:33:55AM -0700, H. Peter Anvin wrote:
>> Heh. I think I might have used the wrong one, though... GPLv2+ vs
>> GPLv2.
> 
> Why is GPLv2+ wrong?
> 
> I thought as long as v2 is explicitly mentioned we're fine.
> 

Fine from a Linux kernel perspective, but it is a matter of which rights
the licensor (here, Intel) wants to grant.

	-hpa

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