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

From: Chris Evans (
Date: Thu Aug 31 2000 - 07:10:17 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)...

Please don't put it back into write(). One of the powerful uses of passing
fds is across privilege boundaries. We don't want that to suddenly stop

Look at it this way: if anyone passes a privileged fd, they either know
what they are doing, or get what they deserve.


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