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Date: Thu, 26 Jul 2001 12:45:30 -0300
From: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
To: "Cress, Andrew R" <andrew.r.cress@intel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Validating Pointers
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In-Reply-To: <9678C2B4D848D41187450090276D1FAE1008EAA8@FMSMSX32>; from andrew.r.cress@intel.com on Thu, Jul 26, 2001 at 08:36:49AM -0700
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Em Thu, Jul 26, 2001 at 08:36:49AM -0700, Cress, Andrew R escreveu:
> 
> Is there a general (correct) kernel subroutine to validate a pointer
> received in a routine as input from the outside world?  Is access_ok() a
> good one to use?

normally one uses get_user & friends and copy_from_user and friends
checking its return and returning -EFAULT if they fail