linux-kernel - Re: [PATCH] arch/x86: fix out-of-bounds in get

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Message-ID: <20150929184141.GB18682@pd.tnic>
Date:	Tue, 29 Sep 2015 20:41:41 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...nel.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	"x86@...nel.org" <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Andrey Konovalov <andreyknvl@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Andi Kleen <ak@...ux.intel.com>,
	kasan-dev <kasan-dev@...glegroups.com>
Subject: Re: [PATCH] arch/x86: fix out-of-bounds in get_wchan()

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.
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