linux-kernel - Re: [PATCH] slub: fix a memory leak in get_partial

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Message-ID: <alpine.LFD.2.02.1205160935340.1763@tux.localdomain>
Date:	Wed, 16 May 2012 09:35:40 +0300 (EEST)
From:	Pekka Enberg <penberg@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
cc:	Joonsoo Kim <js1304@...il.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org
Subject: Re: [PATCH] slub: fix a memory leak in get_partial_node()

<On Tue, 15 May 2012, Christoph Lameter wrote:

> On Wed, 16 May 2012, Joonsoo Kim wrote:
> 
> > In the case which is below,
> >
> > 1. acquire slab for cpu partial list
> > 2. free object to it by remote cpu
> > 3. page->freelist = t
> >
> > then memory leak is occurred.
> 
> Hmmm... Ok so we cannot assign page->freelist in get_partial_node() for
> the cpu partial slabs. It must be done in the cmpxchg transition.
> 
> Acked-by: Christoph Lameter <cl@...ux.com>

Joonsoo, can you please fix up the stable submission format, add 
Christoph's ACK and resend?

			Pekka
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