Re: [CHECKER] pcmcia user-pointer dereference

[Mike Playle (mike@newdawn.uklinux.net)]

On Fri, May 30, 2003 at 01:40:27PM +0100, David Hinds wrote:
> On Thu, May 29, 2003 at 04:30:54PM -0500, Hollis Blanchard wrote:
> > 
> > That's true for pcmcia_get_mem_page. However pcmcia_map_mem_page writes 
> > into the structure it verifies. I think pcmcia_get_first/next_window 
> > could also be used to corrupt memory (*handle = win in 
> > pcmcia_get_window).
> 
> The map_mem_page ioctl can only be used by root.  The get_*_window
> ioctl's can't corrupt anything because they, like get_mem_page, only
> read the target data structures.
> 
> -- Dave

What about memory-mapped IO registers? Can this ioctl be used to cause
an unwanted read from a memory mapped device?

-- 
Mike
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