linux-kernel - Re: [PATCH] mm: fix devision by 0 in percpu_pagelist

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Message-ID: <4F9DF93F.30403@kernel.org>
Date:	Mon, 30 Apr 2012 11:30:23 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Sasha Levin <levinsasha928@...il.com>
CC:	akpm@...ux-foundation.org, rohit.seth@...el.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: fix devision by 0 in percpu_pagelist_fraction

On 04/28/2012 11:25 PM, Sasha Levin wrote:

> percpu_pagelist_fraction_sysctl_handler() has only considered -EINVAL as a possible error
> from proc_dointvec_minmax(). If any other error is returned, it would proceed to divide by
> zero since percpu_pagelist_fraction wasn't getting initialized at any point. For example,
> writing 0 bytes into the proc file would trigger the issue.
> 
> Signed-off-by: Sasha Levin <levinsasha928@...il.com>


Reviewed-by: Minchan Kim <minchan@...nel.org>

-- 
Kind regards,
Minchan Kim
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