From: Auke Kok <redacted>
Date: Thu, 28 Sep 2006 12:56:25 -0700

PHYS_ID pokes in hardware and makes it jump through hoops, in the case of some hardware 
this could create a local DOS attack (e1000 suffers fromt his, probably more if not all) 
where the NIC might stop receiving packets, or the big lock is help indefinately.

Not a good idea

The other ones are fine I think.

I've applied Stephen's patch with PHYS_ID removed from the
allowed list, thanks for the feedback.