linux-kernel - Re: AppArmor FAQ

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Message-ID: <p73abx66fme.fsf@bingen.suse.de>
Date:	17 Apr 2007 20:05:29 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Karl MacMillan <kmacmill@...hat.com>
Cc:	David Safford <safford@...son.ibm.com>,
	James Morris <jmorris@...ei.org>,
	John Johansen <jjohansen@...e.de>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: AppArmor FAQ

Karl MacMillan <kmacmill@...hat.com> writes:
 
> No - the real fix is to change the applications or to run under a policy
> that confines all applications. Most of the problems with resolv.conf,
> mtab, etc. stem from admin processes (e.g., editors or shell scripts)
> all running under the same unconfined domain.
> 
> In some cases applications need modification as only the application has
> enough information to determine the correct label. Usually this means
> preserving labels from input files or separating the output into
> distinct directories so type transitions or label inheritance will work.
> 
> restorecond is just a hack not a requirement or a sign that something is
> wrong with the model. That is why it is a userspace application and not
> integrated into the kernel mechanism.

You nicely show one of the major disadvantages of the label model vs the path 
model here: it requires modification of a lot of applications. 

Maybe John can borrow your statement for new versions of his FAQ @)

-Andi
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