Advice needed for packaging local SELinux policy

[John Florian]

From: devel-bounces at lists.fedoraproject.org [mailto:devel-bounces at lists.fedoraproject.org] On Behalf Of Daniel J Walsh
Sent: Tuesday, July 22, 2014 14:12
To: Development discussions related to Fedora
Subject: Re: Advice needed for packaging local SELinux policy


On 07/22/2014 01:42 PM, John Florian wrote:
I have a locally maintained package for private use that among other things constrains proliferation of files in the following directory:

# ls -lZd /var/lib/puppet/reports/
drwxr-x---. puppet puppet system_u:object_r:puppet_var_lib_t:s0 /var/lib/puppet/reports/

My rpm contains a script that uses the tmpwatch tool to do some of the work and is called by cron and ran as the puppet user.  Using the standard selinux-policy-targeted, I get this AVC (and perhaps others):

type=AVC msg=audit(1405588621.722:37432): avc:  denied  { read } for  pid=15113 comm="tmpwatch" name="puppet" dev="vda3" ino=260273 scontext=system_u:system_r:tmpreaper_t:s0-s0:c0.c1023 tcontext=system_u:object_r:puppet_var_lib_t:s0 tclass=dir

I could change the job to run as root and am familiar with using audit2allow to make a local policy exception.  However, I’d like to resolve the issue via my rpm directly.  I’ve not been successful in finding any guidelines in how to best approach that task.  Do I package a bit of SEL policy or is there a way to have my script run with the puppet_var_lib_t context?
--
John Florian



Then you should add a custom policy to allow tmpreaper_t to manage puppet_var_lib_t.



Okay, that makes sense and is much as I suspected.  Can you (or anyone else) point me to a trivial example spec file that compiles the te to pp, installs (presumably in %post) and uninstalls (in %preun) so that I might avoid common pitfalls and leverage any macros or aids to do this easily and correctly?  Many thanks in advance!

--
John Florian


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