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SubjectRe: Direct access to hardware
In <> Dan Hollis ( 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.

> If you can't bit-bang hardware directly, and kernel API is the only access
> to devices, then it's easier to secure.

> As long as raw hardware access is possible, no amount of kernel API
> parameter checking will protect you from malicious programs. (I think,
> this is a point the GGI guys try to make)

> What userspace programs still require direct raw access to hardware? Only
> X servers?

X servers, DOSEMU, VMWare (it installes kernel module so perhaps it's userspace
part does not need such access).

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