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

From: Matthew Kirkwood (
Date: Thu Aug 31 2000 - 05:34:50 EST

On Thu, 31 Aug 2000, Tigran Aivazian wrote:

> Actually, microcode driver checks CAP_SYS_RAWIO only on open() so it
> would allow access to the receiver of fd even he has no CAP_SYS_RAWIO
> privilege. Hmmm, maybe I should put it back into write() method, as
> Linus (or someone else) did at some point (and I removed it)...

Surely that's correct. Observe that root can send me
an fd to /etc/shadow or /dev/kmem if it so chooses.

Granted, the mtrr and microcode drivers aren't hugely
useful to non-root code, but I see no reason why this
should be a special case.


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