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Date: Fri, 15 Jul 2011 00:00:37 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Mike Waychison <mikew@google.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>,
        Andrew Morton <akpm@linux-foundation.org>,
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Subject: Re: [PATCH 2/2] x86: Allow disabling of sys_iopl, sys_ioperm
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> > a) you can do this with a security module
> 
> I can?   How?   The whole LSM approach seems intractable to me.

It would certainly need some trivial tweaking (to be specific we'd need
to move from capable(x) to capable_syscall(x, syscall_code) for those
interfaces that mattered, but that would probably be a good thing anyway
from the point of view of beating the capability model into something more
flexible and would help stuff like SELinux as well I think.

We have an underlying separation of security from the other details - we
really should keep it clean that way.

Alan