From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Stone <michael@laptop.org>
Subject: Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)
Date: Sun, 10 Jan 2010 20:45:30 -0500
Message-ID: <20100111014530.GB4070@heat>
References: <201001111007.EAG82373.VHFQSLFOFMOOJt@I-love.SAKURA.ne.jp>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	Andi Kleen <andi@firstfloor.org>, David Lang <david@lang.hm>,
	Oliver Hartkopp <socketcan@hartkopp.net>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Valdis Kletnieks <Valdis.Kletnieks@vt.edu>,
	Bryan Donlan <bdonlan@gmail.com>,
	Evgeniy Polyakov <zbr@ioremap.net>,
	"C. Scott Ananian" <cscott@cscott.net>,
	James Morris <jmorris@namei.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Bernie Innocenti <bernie@codewiz.org>,
	Mark Seaborn <mrs@mythic-beasts.com>,
	Randy Dunlap <randy.dunlap@oracle.com>,
	=?iso-8859-1?Q?Am=E9rico?= Wang <xiyou.wangcong@gmail.com>,
	Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
	Samir Bellabes <sam@synack.fr>,
	Casey Schaufler <casey@schaufler-ca.com>,
	"Serge E. Hallyn" <serue@us.ibm.com>, Pavel Machek <pavel@ucw.cz>,
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Return-path: <linux-security-module-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <201001111007.EAG82373.VHFQSLFOFMOOJt@I-love.SAKURA.ne.jp>
Sender: linux-security-module-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

Tetsuo Handa wrote:

>Michael Stone wrote:
>> Examples of software that I want to be able to gain privileges normally include:
>> 
>>    rainbow, which requires privilege in order to add new accounts to the system
>>    and in order to call setuid() but which does not require networking
>>    privileges.
>
> If the system is not using local files (i.e. /etc/passwd and /etc/shadow),
> the process who wants to add new accounts to the system might need network
> access (e.g. to LDAP server), doesn't it?

General purpose account manipulation tools might need network access but
rainbow handles all its account manipulations via state stored in
/var/spool/rainbow/2. This state is made available to the rest of the system
via libnss_rainbow.

Michael