linux-kernel - Re: [PATCH 1/2] slab: Generify kernel pointer validation

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Message-ID: <alpine.DEB.2.00.1004071145070.13261@router.home>
Date:	Wed, 7 Apr 2010 11:55:07 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Ingo Molnar <mingo@...e.hu>, Matt Mackall <mpm@...enic.com>,
	Nick Piggin <npiggin@...e.de>
Subject: Re: [PATCH 1/2] slab: Generify kernel pointer validation

On Wed, 7 Apr 2010, Pekka Enberg wrote:

> +int kern_ptr_validate(const void *ptr, unsigned long size)
> +{
> +	unsigned long addr = (unsigned long)ptr;
> +	unsigned long min_addr = PAGE_OFFSET;

Use the min_addr from the security subsystem?

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