Re: Validating Pointers

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 26 Jul 2001 16:52:48 +0100 (BST)


> 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?

access_ok may do minimal checks, or no checking at all. The only point at
which you can validate a user point is when you use copy*user and
get/put_user to access the data.
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