[selinux] Re: Conflict between local module and local fcontext
Simon Sekidde
ssekidde at redhat.com
Wed Jul 29 10:45:22 UTC 2015
----- Original Message -----
> From: "Robin Lee Powell" <rlpowell at digitalkingdom.org>
> To: "Lukas Vrabec" <lvrabec at redhat.com>, selinux at lists.fedoraproject.org
> Sent: Wednesday, July 29, 2015 6:29:16 AM
> Subject: Re: [selinux] Re: Conflict between local module and local fcontext
>
> I removed this line:
>
> /srv/lojban/irclogs(/.*)?
> system_u:object_r:lojban_logger_logs_t:s0
>
> from the module's .fc file, since that was the only other use of
> lojban_logger_logs_t , and that line was non-functional as
> previously described, and now the fcontext command works.
>
> Yay!, but I don't get it at all.
The purpose of that line in the .fc is to have you avoid running `semanage fcontext -a -t lojban_logger_logs_t '/srv/lojban/irclogs(/.*)?'` since the label for all files in that path dir has been predefined.
>
> On Wed, Jul 29, 2015 at 03:24:50AM -0700, Robin Lee Powell wrote:
> > rlpowell at jukni> rpm -q policycoreutils
> > policycoreutils-2.3-17.fc22.x86_64
> > rlpowell at jukni> rpm -q selinux-policy
> > selinux-policy-3.13.1-128.6.fc22.noarch
> > rlpowell at jukni> sudo semanage fcontext -a -t lojban_logger_logs_t
> > '/srv/lojban/irclogs(/.*)?'
> > libsemanage.dbase_llist_query: could not query record value (No such file
> > or directory).
> > OSError: No such file or directory
> > rlpowell at jukni>
> >
> > I've got other local mods installed, but I don't know how any of
> > them could be relevant.
> >
> > What does that error even *mean*?
> >
> > On Wed, Jul 29, 2015 at 10:32:25AM +0200, Lukas Vrabec wrote:
> > > Please could you update selinux-policy package and try it again?
> > > I tried reproduce it and I cannot see your issue.
> > >
> > > On 07/29/2015 10:01 AM, Robin Lee Powell wrote:
> > > >rlpowell at jukni> rpm -q selinux-policy
> > > >selinux-policy-3.13.1-128.1.fc22.noarch
> > > >rlpowell at jukni> rpm -q policycoreutils
> > > >policycoreutils-2.3-16.fc22.x86_64
> > > >rlpowell at jukni>
> > > >
> > > >On Wed, Jul 29, 2015 at 09:59:43AM +0200, Lukas Vrabec wrote:
> > > >>Hi Robin,
> > > >>Could you attach output of:
> > > >>$ rpm -q selinux-policy
> > > >>$ rpm -q policycoreutils
> > > >>
> > > >>Thank you!
> > > >>
> > > >>On 07/29/2015 09:03 AM, Robin Lee Powell wrote:
> > > >>>On Tue, Jul 28, 2015 at 12:07:51AM -0700, Robin Lee Powell wrote:
> > > >>>>On Mon, Jul 27, 2015 at 08:29:29PM -0700, Robin Lee Powell wrote:
> > > >>>>>On Mon, Jul 27, 2015 at 07:45:11PM -0400, Simon Sekidde wrote:
> > > >>>>>>----- Original Message -----
> > > >>>>>>>From: "Robin Lee Powell" <rlpowell at digitalkingdom.org>
> > > >>>>>>>To: selinux at lists.fedoraproject.org
> > > >>>>>>>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.
> > > >>>>Ah, I see what you're saying; that way at least I'd *have* a file
> > > >>>>type, that I could then add with semanage. I'll try that, thanks.
> > > >>>So I did that, and now:
> > > >>>
> > > >>>rlpowell at jukni> sudo semanage fcontext -a -t lojban_logger_logs_t
> > > >>>'/srv/lojban/irclogs(/.*)?'
> > > >>>libsemanage.dbase_llist_query: could not query record value (No such
> > > >>>file or directory).
> > > >>>OSError: No such file or directory
> > > >>>rlpowell at jukni>
> > > >>>
> > > >>>Here's the policy:
> > > >>>
> > > >>> policy_module(MYLOCAL_lojbanlogger, 1.6.0)
> > > >>> ########################################
> > > >>> #
> > > >>> # Declarations
> > > >>> #
> > > >>> type lojban_logger_t;
> > > >>> type lojban_logger_logs_t;
> > > >>> type lojban_logger_exec_t;
> > > >>> gen_require(`
> > > >>> type httpd_t;
> > > >>> type setfiles_t;
> > > >>> type unconfined_t;
> > > >>> type staff_t;
> > > >>> ')
> > > >>> #============= lojban_logger_t ==============
> > > >>> manage_dirs_pattern( lojban_logger_t, lojban_logger_logs_t,
> > > >>> lojban_logger_logs_t)
> > > >>> manage_files_pattern( lojban_logger_t, lojban_logger_logs_t,
> > > >>> lojban_logger_logs_t)
> > > >>> # Be a file type and a domain
> > > >>> application_domain( lojban_logger_t, lojban_logger_exec_t )
> > > >>> # File type
> > > >>> logging_log_file(lojban_logger_logs_t)
> > > >>> # Be an init/systemd daemon
> > > >>> init_daemon_domain(lojban_logger_t, lojban_logger_exec_t)
> > > >>> # connect to ircd
> > > >>> corenet_tcp_connect_ircd_port(lojban_logger_t)
> > > >>>--
> > > >>>selinux mailing list
> > > >>>selinux at lists.fedoraproject.org
> > > >>>https://admin.fedoraproject.org/mailman/listinfo/selinux
> > > >>--
> > > >>Lukas Vrabec
> > > >>SELinux Solutions
> > > >>Red Hat, Inc.
> > > >>
> > > >>--
> > > >>selinux mailing list
> > > >>selinux at lists.fedoraproject.org
> > > >>https://admin.fedoraproject.org/mailman/listinfo/selinux
> > >
> > > --
> > > Lukas Vrabec
> > > SELinux Solutions
> > > Red Hat, Inc.
> > >
> > > --
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> > > https://admin.fedoraproject.org/mailman/listinfo/selinux
> >
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--
Simon Sekidde * Red Hat, Inc. * Westford, MA
gpg: 5848 958E 73BA 04D3 7C06 F096 1BA1 2DBF 94BC 377E
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