From owner-svn-src-head@freebsd.org  Tue Sep 27 12:03:34 2016
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Date: Tue, 27 Sep 2016 15:03:30 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Konstantin Belousov <kostikbel@gmail.com>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r306350 - head/sys/amd64/amd64
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References: <201609261722.u8QHMi7g065274@repo.freebsd.org>
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 <20160927115629.GI38409@kib.kiev.ua>
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On Tue, Sep 27, 2016 at 02:56:29PM +0300, Konstantin Belousov wrote:

> On Tue, Sep 27, 2016 at 12:28:28AM +0300, Slawa Olhovchenkov wrote:
> > On Mon, Sep 26, 2016 at 05:22:44PM +0000, Konstantin Belousov wrote:
> > 
> > > Author: kib
> > > Date: Mon Sep 26 17:22:44 2016
> > > New Revision: 306350
> > > URL: https://svnweb.freebsd.org/changeset/base/306350
> > > 
> > > Log:
> > >   For machines which support PCID but not have INVPCID instruction,
> > >   i.e. SandyBridge and IvyBridge, correct a race between pmap_activate()
> > >   and invltlb_pcid_handler().
> > >   
> > >   Reported by and tested by:	Slawa Olhovchenkov <slw@zxy.spb.ru>
> > >   MFC after:	1 week
> > 
> > Thanks!
> > Planed commit to releng? Or SA?
> 
> A notice on the errata page is planned.

EN, not SA?
I think this is exploitable.