linux-kernel - Re: [RFC][PATCH v3] Unprivileged: Disable raising of privileges

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Message-ID: <hhioif$j9t$3@taverner.cs.berkeley.edu>
Date:	Thu, 31 Dec 2009 17:55:27 +0000 (UTC)
From:	daw@...berkeley.edu (David Wagner)
To:	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH v3] Unprivileged: Disable raising of privileges

Alan Cox  wrote:
>Removing specific features from a specific piece of code
>generally isn't a security feature -

You lost me there.  The ability of a specific piece of code to voluntarily
relinquish privileges can be a big benefit to security.  It enables
privilege-separated software architectures, which are a powerful way to
reduce risk.  That's the motivation for the disablenetwork proposal that
has stimulated all this discussion.  I hope this is obvious?  Does it
need elaboration?
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