linux-kernel - Re: [PATCH v2] kasan: avoid overflowing quarantine size on low memory systems

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Message-ID: <57A0C5C8.4030304@virtuozzo.com>
Date:	Tue, 2 Aug 2016 19:09:44 +0300
From:	Andrey Ryabinin <aryabinin@...tuozzo.com>
To:	Alexander Potapenko <glider@...gle.com>, <dvyukov@...gle.com>,
	<kcc@...gle.com>, <adech.fo@...il.com>, <cl@...ux.com>,
	<akpm@...ux-foundation.org>, <rostedt@...dmis.org>,
	<js1304@...il.com>, <iamjoonsoo.kim@....com>,
	<kuthonuzo.luruo@....com>
CC:	<kasan-dev@...glegroups.com>, <linux-kernel@...r.kernel.org>,
	<linux-mm@...ck.org>
Subject: Re: [PATCH v2] kasan: avoid overflowing quarantine size on low memory
 systems

On 08/02/2016 01:27 PM, Alexander Potapenko wrote:
> If the total amount of memory assigned to quarantine is less than the
> amount of memory assigned to per-cpu quarantines, |new_quarantine_size|
> may overflow. Instead, set it to zero.
> 
> Reported-by: Dmitry Vyukov <dvyukov@...gle.com>
> Fixes: 55834c59098d ("mm: kasan: initial memory quarantine
> implementation")
> Signed-off-by: Alexander Potapenko <glider@...gle.com>

Acked-by: Andrey Ryabinin <aryabinin@...tuozzo.com>