linux-kernel - Re: [PATCH] slub: Potential stack overflow

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Message-ID: <alpine.DEB.2.00.1003241414270.14329@router.home>
Date:	Wed, 24 Mar 2010 14:16:01 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	Pekka J Enberg <penberg@...helsinki.fi>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] slub: Potential stack overflow

On Wed, 24 Mar 2010, Eric Dumazet wrote:

> I discovered that we can overflow stack if CONFIG_SLUB_DEBUG=y and use
> slabs with many objects, since list_slab_objects() and process_slab()
> use DECLARE_BITMAP(map, page->objects);

Maybe we better allocate the bitmap via kmalloc then.

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