Re: [PATCH] mtrr: s/suser/capable/

From: Matthew Kirkwood (
Date: Thu Aug 31 2000 - 06:35:51 EST

On Thu, 31 Aug 2000, Andi Kleen wrote:

> > > Clearly? How do MTRR changes relate to rawio ?
> >
> > RAWIO is about hardware level access not Stephens O_DIRECT stuff
> So why is /proc/kcore access SYS_RAWIO then ?

I kind of overloaded CAP_SYS_RAWIO to restrict access to bits
of arbitrary memory. Maybe this one should require CAP_PTRACE
and CAP_DAC_OVERRIDE instead.

> And why is nvram access not SYS_RAWIO ?

What level of interface does it offer? If it's a simple read/
write, then it's no more RAWIO than /dev/hda.

Once upon a time I had a big patch which caught a lot of these
things (funny devices, device setup ioctl()s, etc) but nobody
seemed interested in it. Really, I think that set of available
capabilities needs refactoring.


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