linux-kernel - Re: [PATCH 2/2] mm: fix NULL ptr dereference in move

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Message-ID: <alpine.DEB.2.00.1204130851470.10789@router.home>
Date:	Fri, 13 Apr 2012 08:52:05 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Sasha Levin <levinsasha928@...il.com>
cc:	akpm@...ux-foundation.org, hughd@...gle.com,
	dave@...ux.vnet.ibm.com, ebiederm@...ssion.com, davej@...hat.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] mm: fix NULL ptr dereference in move_pages

On Fri, 13 Apr 2012, Sasha Levin wrote:

> Commit 3268c63 ("mm: fix move/migrate_pages() race on task struct") has added
> an odd construct where 'mm' is checked for being NULL, and if it is, it would
> get dereferenced anyways by mput()ing it.

Acked-by: Christoph Lameter <cl@...ux.com>

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