Re: proxy memory objects patch

[Marcus Brinkmann]

On Wed, Nov 20, 2002 at 09:12:06PM -0500, Roland McGrath wrote:
> > here is my patch for proxy memory objects
> 
> Yowza!  Does it actually work?

Yes, it is tested.  I wrote two programs: One calling io_map and mapping the
memobjrd for writing, which is basically an exploit.  The other creates a
proxy memory object restricted to VM_PROT_READ from the memobjrd object, and
then any attempts to write tot he mapped region (mapped with
VM_PROT_READ|VM_PROT_WRITE) segfaults.

Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' GNU      http://www.gnu.org    marcus@gnu.org
Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de/