netdev - Re: [PATCH v2] cipso: handle CIPSO options correctly when NetLabel is disabled

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Message-Id: <20120601.141810.1973076676004541876.davem@davemloft.net>
Date:	Fri, 01 Jun 2012 14:18:10 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	pmoore@...hat.com
Cc:	netdev@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: [PATCH v2] cipso: handle CIPSO options correctly when NetLabel
 is disabled

From: Paul Moore <pmoore@...hat.com>
Date: Fri, 01 Jun 2012 11:54:56 -0400

> When NetLabel is not enabled, e.g. CONFIG_NETLABEL=n, and the system
> receives a CIPSO tagged packet it is dropped (cipso_v4_validate()
> returns non-zero).  In most cases this is the correct and desired
> behavior, however, in the case where we are simply forwarding the
> traffic, e.g. acting as a network bridge, this becomes a problem.
> 
> This patch fixes the forwarding problem by providing the basic CIPSO
> validation code directly in ip_options_compile() without the need for
> the NetLabel or CIPSO code.  The new validation code can not perform
> any of the CIPSO option label/value verification that
> cipso_v4_validate() does, but it can verify the basic CIPSO option
> format.
> 
> The behavior when NetLabel is enabled is unchanged.
> 
> CC: stable@...r.kernel.org
> Signed-off-by: Paul Moore <pmoore@...hat.com>
> 

I like this a lot better, applied, thanks Paul.
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