On Llu, 2006-04-03 at 00:39 +0200, Arjan van de Ven wrote:
> is there any difference? I mean... if you can outb you for all intents
> and purposes are root anyway ;) (like you can overwrite any memory in
> the system etc etc)
There are two clear uses
#1 Its possible to write such a module to allow only some ports to be
accessed, eg to export a PCI device for learning purposes
#2 As root you can make mistakes and mess up a box. Having the ability
to do stuff and having the default as "its allowed" differ. Giving
someone iopl rights is a bit like giving someone sudo. The security
against active attack is unchanged, the security against screwups is
higher
Alan
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