linux-kernel - Re: [PATCH v5] RO/NX protection for loadable kernel modules

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Date:	Sun, 12 Jul 2009 15:14:30 -0700
From:	Greg KH <greg@...ah.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, Ingo Molnar <mingo@...e.hu>,
	Siarhei Liakh <sliakh.lkml@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	James Morris <jmorris@...ei.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@....de>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, linux-cris-kernel@...s.com
Subject: Re: [PATCH v5] RO/NX protection for loadable kernel modules

On Sun, Jul 12, 2009 at 02:58:04PM -0700, Arjan van de Ven wrote:
> On Sun, 12 Jul 2009 10:33:29 -0700
> Greg KH <greg@...ah.com> wrote:
> 
> > > 
> > > 105 is also a sign that you picked a somewhat suboptimal config...
> > > that's of course your choice but it's a choice that has a small
> > > price, if you don't want to pay that price, changing the config to
> > > not be entirely insane is a good answer as well ;-)
> > 
> > But this is the "common" case in the world of Linux where the distros
> > are forced to build everything as modules. 
> 
> who's holding the stick?
> Really.

Stick?

> I've seen some of these case, where the distro kernel has something as
> a module, but the other parts of the distro the unconditionally load
> that module always. That makes no sense.
> If you have 105 different real devices in your system, that have
> different drivers, sure, I'll buy 105. Somehow I doubt Rusty's box has
> 105 ;)

Sure, and I agree that some distros do modularize stuff too much, and am
personally changing this on a distro that I can change.  But even then,
I expect a "normal" system will end up with about 20-50 different
modules, due to a variety of good reasons (legacy system and ability to
handle wierd configurations better being both of them.)

thanks,

greg k-h
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