linux-kernel - Re: [PATCH v9 00/17] Kernel address sanitizer

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Message-id: <54C21EFD.6080900@samsung.com>
Date:	Fri, 23 Jan 2015 13:14:21 +0300
From:	Andrey Ryabinin <a.ryabinin@...sung.com>
To:	Sasha Levin <sasha.levin@...cle.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Konstantin Serebryany <kcc@...gle.com>,
	Dmitry Chernenkov <dmitryc@...gle.com>,
	Andrey Konovalov <adech.fo@...il.com>,
	Yuri Gribov <tetra2005@...il.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Michal Marek <mmarek@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	Vegard Nossum <vegard.nossum@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Dave Jones <davej@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH v9 00/17] Kernel address sanitizer - runtime memory
 debugger.

On 01/23/2015 12:46 AM, Sasha Levin wrote:
> Just to keep it going, here's a funny trace where kasan is catching issues
> in ubsan: :)
> 

Thanks, it turns out to be a GCC bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64741

As a workaround you could put kasan_disable_local()/kasan_enable_local()
into ubsan_prologue()/ubsan_epilogue().

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