problems confining a process

[Dominick Grift]

No, but you could add the following to the .te file:

gen_require(` type unconfined_t; role unconfined_r; ')
CZtp_role(unconfined_r, unconfined_t)

.. Instead of what i suggested in my previous reply. Both methods should
make the domain transition happen.

On Sat, 2011-07-23 at 21:03 +0200, Michael Atighetchi wrote:
> One more point. Here is the .if file that sepolgen generated (see below 
> between {{{ and }}}).
> Should I manually add the gen_requie and domatrans_pattern lines you 
> suggested to that policy ?
> 
> Michael
> 
> {{{
> 
> ## <summary>policy for CZtp</summary>
> 
> 
> ########################################
> ## <summary>
> ##      Execute a domain transition to run CZtp.
> ## </summary>
> ## <param name="domain">
> ## <summary>
> ##      Domain allowed access.
> ## </summary>
> ## </param>
> #
> interface(`CZtp_domtrans',`
>          gen_require(`
>                  type CZtp_t, CZtp_exec_t;
>          ')
> 
>          domtrans_pattern($1, CZtp_exec_t, CZtp_t)
> ')
> 
> 
> ########################################
> ## <summary>
> ##      Execute CZtp in the CZtp domain, and
> ##      allow the specified role the CZtp domain.
> ## </summary>
> ## <param name="domain">
> ## <summary>
> ##      Domain allowed access
> ## </summary>
> ## </param>
> ## <param name="role">
> ## <summary>
> ##      The role to be allowed the CZtp domain.
> ## </summary>
> ## </param>
> #
> interface(`CZtp_run',`
>          gen_require(`
>                  type CZtp_t;
>          ')
> 
>          CZtp_domtrans($1)
>          role $2 types CZtp_t;
> ')
> 
> ########################################
> ## <summary>
> ##      Role access for CZtp
> ## </summary>
> ## <param name="role">
> ## <summary>
> ##      Role allowed access
> ## </summary>
> ## </param>
> ## <param name="domain">
> ## <summary>
> ##      User domain for the role
> ## </summary>
> ## </param>
> #
> interface(`CZtp_role',`
>          gen_require(`
>                type CZtp_t;
>          ')
> 
>          role $1 types CZtp_t;
> 
>          CZtp_domtrans($2)
> 
>          ps_process_pattern($2, CZtp_t)
>          allow $2 CZtp_t:process signal;
> ')
> 
> }}}
> 
> 
> 
> On 7/23/2011 8:43 PM, Dominick Grift wrote:
> > You are probably missing a domain type transition.
> >
> > running the following command you can see if unconfined_t has a domain
> > type transition defined when it runs executable files with type
> > CZtp_exec_t:
> >
> > sesearch -SCT --allow -s unconfined_t -t CZtp_exec_t
> >
> > if none is specified then you must specify that your calling domain
> > unconfined_t, domain type transitions to CZtp_t when a file with type
> > CZtp_exec_t is executed.
> >
> > You will also need to allow the unconfined_r role the CZtp_t domain.
> >
> > After that you may want to allow unconfined_t to interact with CZtp_t in
> > other ways as well but at least by then the type transition should
> > happen.
> >
> > The policy:
> >
> > gen_require(` type unconfined_t, CZtp_exec_t, CZtp_t; role unconfined_r;
> > ')
> > domtrans_pattern(unconfined_t, CZtp_exec_t, CZtp_t)
> > role unconfined_r types CZtp_t;
> >
> >
> > On Sat, 2011-07-23 at 20:32 +0200, Michael Atighetchi wrote:
> >> Hi,
> >>
> >> I'm trying to create a new policy for a constrained process (started by
> >> an unconstrainted user) and am stuck trying to get the process started
> >> in the right context.
> >>
> >> Here are the steps I followed:
> >>
> >> 0. confirm SELinux status
> >> [proxyuser at lime ~]$ sestatus
> >> SELinux status:                 enabled
> >> SELinuxfs mount:                /selinux
> >> Current mode:                   permissive
> >> Mode from config file:          permissive
> >> Policy version:                 24
> >> Policy from config file:        targeted
> >>
> >> [proxyuser at lime ~]$ cat /etc/redhat-release
> >> Fedora release 14 (Laughlin)
> >>
> >> [proxyuser at lime cz]$ id -Z
> >> unconfined_u:unconfined_r:unconfined_t:s0
> >>
> >> 1. create policy via
> >>
> >> sepolgen -t 3 /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
> >>
> >> Note that CZtp is a shell script which in turn calls the JVM.
> >>
> >> [proxyuser at lime cz]$ sudo ./CZtp.sh
> >> Building and Loading Policy
> >> + make -f /usr/share/selinux/devel/Makefile
> >> make: Nothing to be done for `all'.
> >> + /usr/sbin/semodule -i CZtp.pp
> >> + /sbin/restorecon -F -R -v
> >> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
> >> /sbin/restorecon reset
> >> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp context
> >> system_u:system_r:CZtp_exec_t:s0->system_u:object_r:CZtp_exec_t:s0
> >>
> >> 2. Verify that the the CZtp file is labeled properly:
> >> [proxyuser at lime cz]$ ls -lZ
> >> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
> >> -rwxr-xr-x. proxyuser proxyuser system_u:object_r:CZtp_exec_t:s0
> >> /home/proxyuser/trunk/aps-base/crumple-zone/target/CZtp
> >>
> >> 3. start process
> >> [proxyuser at lime cz]$ cd /home/proxyuser/trunk/aps-base/crumple-zone/target/
> >> [proxyuser at lime target]$ ./CZtp
> >>
> >> 4. Verify process context
> >> [proxyuser at lime ~]$ ps -efZ | grep -v grep | grep CZtp
> >> unconfined_u:unconfined_r:unconfined_t:s0 501 5789 5734  0 14:22 pts/0
> >> 00:00:00 /bin/sh ./CZtp
> >>
> >>
> >> Note that the process shows up as unconfined_t, although it was labeled
> >> with CZtp_exec_t.
> >>
> >> What am I missing?
> >>
> >>
> >>
> >> 4. check process context
> >>
> 
> 
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