linux-kernel - Re: [RFC/PATCH -next 00/21] Address sanitizer for kernel (kasan)

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Message-ID: <alpine.DEB.2.11.1407141012520.25405@gentwo.org>
Date:	Mon, 14 Jul 2014 10:13:56 -0500 (CDT)
From:	Christoph Lameter <cl@...two.org>
To:	Andrey Ryabinin <ryabinin.a.a@...il.com>
cc:	"H. Peter Anvin" <hpa@...or.com>,
	Andrey Ryabinin <a.ryabinin@...sung.com>,
	linux-kernel@...r.kernel.org, Dmitry Vyukov <dvyukov@...gle.com>,
	Konstantin Serebryany <kcc@...gle.com>,
	Alexey Preobrazhensky <preobr@...gle.com>,
	Andrey Konovalov <adech.fo@...il.com>,
	Yuri Gribov <tetra2005@...il.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Michal Marek <mmarek@...e.cz>,
	Russell King <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kbuild@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	x86@...nel.org, linux-mm@...ck.org
Subject: Re: [RFC/PATCH -next 00/21] Address sanitizer for kernel (kasan) -
 dynamic memory error detector.

On Sun, 13 Jul 2014, Andrey Ryabinin wrote:

> > How does that work when memory is sparsely populated?
> >
>
> Sparsemem configurations currently may not work with kasan.
> I suppose I will have to move shadow area to vmalloc address space and
> make it (shadow) sparse too if needed.

Well it seems to work with sparsemem / vmemmap? So non vmmemmapped configs
of sparsemem only. vmemmmap can also handle holes in memory.

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