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From: Paul Moore <paul@paul-moore.com>
To: jwcart2 <jwcart2@tycho.nsa.gov>,
	Joshua Brindle <joshua.brindle@crunchydata.com>
Cc: selinux@vger.kernel.org
Subject: Re: [Non-DoD Source] [PATCH v4] Add default_range glblub support
Date: Wed, 11 Sep 2019 19:52:48 -0400
Message-ID: <CAHC9VhQXf=h2BhaWvnwdJkLMHUdEV8F5pL4TSqAu6UkL3_FWpg@mail.gmail.com> (raw)
In-Reply-To: <0ea96cc4-11bb-5c4a-5f0a-75411a58e546@tycho.nsa.gov>

On Tue, Sep 10, 2019 at 1:27 PM jwcart2 <jwcart2@tycho.nsa.gov> wrote:
> On 9/9/19 2:05 PM, Joshua Brindle wrote:
> > Policy developers can set a default_range default to glblub and
> > computed contexts will be the intersection of the ranges of the
> > source and target contexts. This can be used by MLS userspace
> > object managers to find the range of clearances that two contexts
> > have in common. An example usage is computing a transition between
> > the network context and the context of a user logging into an MLS
> > application.
> >
> > For example, one can add a default with
> > this cil:
> >
> > (defaultrange db_table glblub)
> >
> > or in te (base module only):
> >
> > default_range db_table glblub;
> >
> > and then test using the compute_create utility:
> >
> > $ ./compute_create system_u:system_r:kernel_t:s0:c1,c2,c5-s0:c1.c20 system_u:system_r:kernel_t:s0:c0.c20-s0:c0.c36 db_table
> > system_u:object_r:kernel_t:s0:c1,c2,c5-s0:c1.c20
> >
> > Some example range transitions are:
> >
> > User Permitted Range | Network Device Label | Computed Label
> > ---------------------|----------------------|----------------
> > s0-s1:c0.c12         | s0                   | s0
> > s0-s1:c0.c12         | s0-s1:c0.c1023       | s0-s1:c0.c12
> > s0-s4:c0.c512        | s1-s1:c0.c1023       | s1-s1:c0.c512
> > s0-s15:c0,c2         | s4-s6:c0.c128        | s4-s6:c0,c2
> > s0-s4                | s2-s6                | s2-s4
> > s0-s4                | s5-s8                | INVALID
> > s5-s8                | s0-s4                | INVALID
> >
> > Signed-off-by: Joshua Brindle <joshua.brindle@crunchydata.com>
>
> Merged.
> Thanks,
> Jim

Thanks guys.  We're at -rc8 for the kernel right now so it's a little
late to pull the corresponding kernel patch, but I'll do that after
the merge window closes.

-- 
paul moore
www.paul-moore.com

      reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-09 18:05 Joshua Brindle
2019-09-10 17:22 ` [Non-DoD Source] " jwcart2
2019-09-11 23:52   ` Paul Moore [this message]

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