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SubjectRe: Direct access to hardware
On 21 Jul 2000, Miquel van Smoorenburg wrote:

> In article <cistron.Pine.LNX.4.21.0007211543460.12570-100000@anime.net>,
> Dan Hollis <goemon@sasami.anime.net> wrote:
> >On Sat, 22 Jul 2000, Ville Herva wrote:
> >> So, would it be feasible to make it possible to disable direct hardware
> >> access (/dev/mem, /dev/nvram, HD ioctls, what else?) completely in kernel
> >> config?
> >
> >I would certainly feel better if this were possible, in which case Andre's
> >patch would be more reasonable.
>
> It _is_ possible. Check out "capabilities".

It isn't possible. Root can bypass them all completely, as long as
/dev/kmem etc. exist. Shall we delete capabilities on this basis? I think
not - so why apply that argument to Andre's bugfix?


James.


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