Re: [selinux] Re: Conflict between local module and local fcontext

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On Mon, Jul 27, 2015 at 07:45:11PM -0400, Simon Sekidde wrote:
> 
> 
> ----- Original Message -----
> > From: "Robin Lee Powell" <rlpowell@xxxxxxxxxxxxxxxxxx>
> > To: selinux@xxxxxxxxxxxxxxxxxxxxxxx
> > Sent: Monday, July 27, 2015 6:05:51 PM
> > Subject: Conflict between local module and local fcontext
> > 
> > 
> > So I have a custom module that includes:
> > 
> >   type lojban_logger_t;
> >   type lojban_logger_exec_t;
> >   
> >   application_domain( lojban_logger_t, lojban_logger_exec_t)
> >   init_daemon_domain(lojban_logger_t, lojban_logger_exec_t)
> > 
> > (not sure if those are redundant?) and:
> > 
> >   /srv/lojban/irclogs(/.*)?      system_u:object_r:lojban_logger_t:s0
> > 
> > I've made a variety of changes with "semodule fcontext", including:
> > 
> >   /srv/lojban    system_u:object_r:httpd_user_content_t:s0
> >   /srv/lojban(/.*)?    system_u:object_r:httpd_user_content_t:s0
> > 
> > As a result, the changes in my module are ignored, and the files
> > end up with httpd_user_content_t
> > 
> > So I tried:
> > 
> >   $ sudo semanage fcontext -a -t lojban_logger_t '/srv/lojban/irclogs(/.*)?'
> >   ValueError: Type lojban_logger_t is invalid, must be a file or device type
> > 
> > Uhh.
> > 
> > I guess this means that the custom module's types can't be seen by
> > semanage?
> > 
> > So, what's the correct solution here?
> > 
> 
> 1) Define a new type that is usable for log files in the .te
> 
> type logjban_logger_log_t; 
> logging_log_type(logjban_logger_log_t)
> 
> 2) Add this label to the path in the .fc
> 
> /srv/lojban/irclogs(/.*)?      system_u:object_r:logjban_logger_log_t:s0

Unless I'm missing something, this won't help at all; the semanage
fcontext rule will win, and they'll end up with httpd_user_content_t
per the rule for /srv/lojban(/.*)? , because semanage fcontext rules
*always* win over module rules.

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