linux-kernel - Re: [PATCH] ptrace: allow restriction of ptrace scope

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Message-Id: <E1FEE555-566E-4698-8FD8-240076A4F850@mit.edu>
Date:	Fri, 18 Jun 2010 06:54:57 -0400
From:	Theodore Tso <tytso@....EDU>
To:	Casey Schaufler <casey@...aufler-ca.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Kees Cook <kees.cook@...onical.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	James Morris <jmorris@...ei.org>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>,
	Dave Young <hidave.darkstar@...il.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Roland McGrath <roland@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	David Howells <dhowells@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-doc@...r.kernel.org, Stephen Smalley <sds@...ho.nsa.gov>,
	Daniel J Walsh <dwalsh@...hat.com>,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] ptrace: allow restriction of ptrace scope

i think we really need to have stacked LSM's, because there is a large set
of people who will never use SELinux.  Every few years, I take another 
look at SELinux, my head explodes with the (IMHO unneeded complexity),
and I go away again...

Yet I would really like a number of features such as this ptrace scope idea ---
which I think is a useful feature, and it may be that stacking is the only
way we can resolve this debate.   The SELinux people will never believe that
their system is too complicated, and I don't like using things that are impossible
for me to understand or configure, and that doesn't seem likely to change anytime
in the near future.

I mean, even IPSEC RFC's are easier for me to understand, and that's saying
a lot...

-- Ted

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