Message-id: <53BE4141.6060908@samsung.com>
Date: Thu, 10 Jul 2014 11:31:13 +0400
From: Andrey Ryabinin <a.ryabinin@samsung.com>
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To: Christoph Lameter <cl@gentwo.org>
Cc: linux-kernel@vger.kernel.org, Dmitry Vyukov <dvyukov@google.com>,
        Konstantin Serebryany <kcc@google.com>,
        Alexey Preobrazhensky <preobr@google.com>,
        Andrey Konovalov <adech.fo@gmail.com>,
        Yuri Gribov <tetra2005@gmail.com>,
        Konstantin Khlebnikov <koct9i@gmail.com>,
        Sasha Levin <sasha.levin@oracle.com>, Michal Marek <mmarek@suse.cz>,
        Russell King <linux@arm.linux.org.uk>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        Pekka Enberg <penberg@kernel.org>,
        David Rientjes <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kbuild@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        x86@kernel.org, linux-mm@kvack.org
Subject: Re: [RFC/PATCH RESEND -next 01/21] Add kernel address sanitizer
 infrastructure.
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 <alpine.DEB.2.11.1407090924030.1384@gentwo.org>
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On 07/09/14 18:26, Christoph Lameter wrote:
> On Wed, 9 Jul 2014, Andrey Ryabinin wrote:
> 
>> +
>> +Markers of unaccessible bytes could be found in mm/kasan/kasan.h header:
>> +
>> +#define KASAN_FREE_PAGE         0xFF  /* page was freed */
>> +#define KASAN_PAGE_REDZONE      0xFE  /* redzone for kmalloc_large allocations */
>> +#define KASAN_SLAB_REDZONE      0xFD  /* Slab page redzone, does not belong to any slub object */
> 
> We call these zones "PADDING". Redzones are associated with an object.
> Padding is there because bytes are left over, unusable or necessary for
> alignment.
> 
Goop point. I will change the name to make it less confusing.
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