Re: [CHECKER] pcmcia user-pointer dereference
Mike Playle (mike@newdawn.uklinux.net)
Fri, 30 May 2003 13:43:14 +0100
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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