linux-kernel - Re: request_module vs. modprobe blacklist (and security subsystem implications)

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Message-ID: <20091022004810.GS32470@one.firstfloor.org>
Date:	Thu, 22 Oct 2009 02:48:10 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Paris <eparis@...hat.com>
Cc:	linux-kernel@...r.kernel.org, arjan@...radead.org,
	randy.dunlap@...cle.com, rusty@...tcorp.com.au,
	andi@...stfloor.org, dhowells@...hat.com, akpm@...ux-foundation.org
Subject: Re: request_module vs. modprobe blacklist (and security subsystem implications)

> The problem is that a number of programs (sendmail, procmail, sshd, and
> more) have all been seen to do operations which tried to load the ipv6
> module.  These get into request_module(), hit the security hook, and are
> obviously denied since the security system doesn't see a need for those
> programs to be able to request a module be loaded.

What's the problem with being denied? After all the programs expect
this to error out

If you're worrying about the audit entries -- the obvious place
to fix that is somewhere in your security code. Don't make the rest
of the code uglier for this.

-Andi
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