From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S965296AbbI2Slw (ORCPT <rfc822;w@1wt.eu>);
	Tue, 29 Sep 2015 14:41:52 -0400
Received: from mail.skyhub.de ([78.46.96.112]:58159 "EHLO mail.skyhub.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S964839AbbI2Slo (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 29 Sep 2015 14:41:44 -0400
Date: Tue, 29 Sep 2015 20:41:41 +0200
From: Borislav Petkov <bp@alien8.de>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>, Dmitry Vyukov <dvyukov@google.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>,
        Denys Vlasenko <dvlasenk@redhat.com>,
        "x86@kernel.org" <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Kostya Serebryany <kcc@google.com>,
        Alexander Potapenko <glider@google.com>,
        Andrey Konovalov <andreyknvl@google.com>,
        Sasha Levin <sasha.levin@oracle.com>, Andi Kleen <ak@linux.intel.com>,
        kasan-dev <kasan-dev@googlegroups.com>
Subject: Re: [PATCH] arch/x86: fix out-of-bounds in get_wchan()
Message-ID: <20150929184141.GB18682@pd.tnic>
References: <1443430839-13225-1-git-send-email-dvyukov@google.com>
 <CAPAsAGwyUQc6UffyQ=vJSNwOYQWE9XMzK5dT__C4r5_+qEYfHA@mail.gmail.com>
 <CACT4Y+ZWgVz_4NEJbsZWYBHn91M7UNxMNUk_+SebtOfBAoN_LA@mail.gmail.com>
 <alpine.DEB.2.11.1509281830160.4500@nanos>
 <CALCETrWWsFB+aWKhadoaftNNjU=gRa15+7PXOR=3yrVzXuar6w@mail.gmail.com>
 <CALCETrW5-_JFO_9F9bt2F1s5N_dseffYxCTX_SHJL39UcMyrFQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <CALCETrW5-_JFO_9F9bt2F1s5N_dseffYxCTX_SHJL39UcMyrFQ@mail.gmail.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, Sep 29, 2015 at 11:30:33AM -0700, Andy Lutomirski wrote:
> Also, I like Borislav's READ_ONCE suggestion.  Let's avoid TOCTOU due
> to optimization.

Dmitry's original patch did READ_ONCE already.

> Re: a CVE: if anyone wants a CVE, ask oss-security. It's unclear to me
> exactly how one might exploit this.

I was just asking - it possibly leaking sensitive info and all.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.