Debian's PAM configuration uses a patched pam_motd module that runs
files in /etc/update-motd.d/ in order to generate a dynamic Message Of
The Day (MOTD). By default, there is only one script:
$ cat /etc/update-motd.d/10-uname
#!/bin/sh
uname -snrvm
According to https://wiki.debian.org/motd, the script is executed
through run-parts:
if (!system("/usr/bin/env -i
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
run-parts --lsbsysinit /etc/update-motd.d >
/run/motd.dynamic.new"))
rename("/run/motd.dynamic.new", "/run/motd.dynamic");
This requires allowing pam_motd users to execute bin_t commands
(/usr/bin/env) and shells (/bin/sh), and to manage /run/motd.dynamic*
files.
Allow relevant accesses for Debian-based systems.
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
The type systemd_unit_t is actually declared in init.te.
Moved the file contexts to label transient systemd files with the
systemd_unit_t type from systemd.fc to init.fc.
Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
The type initrc_var_run_t is actually declared in init.te and moving it
removes a dependency of the base module (which files is a part) on a
module.
Moved the file contexts to label motd for debian systems with the
initrc_var_run_t type from files.fc to init.fc.
Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
I am seeing (on RHEL 7.4 w/systemd) that halting the system doesn't work. It took me a long time (and a lot of help from Steve L.) to figure out what was going on. It turns out in refpolicy the default label for /usr/lib/systemd/systemd-shutdown is bin_t. But when systemd tried to execve systemd-shutdown it fails because init_t isn't allowed file entrypoint for bin_t. When I labeled systemd-shutdown as init_exec_t shutting down the system works.
I was seeing the following log (from systemd) when I enabled systemd debug logging (which was very useful).
[ 59.745037] systemd[1]: Starting Final Step.
[ 59.746112] systemd[1]: Starting Power-Off...
[ 59.776320] systemd[1]: Shutting down.
[ 59.783559] systemd[1]: Failed to execute shutdown binary, freezing: Operation not permitted
At this point everything locks up instead of actually halting the system.
This is a patch to change the label for systemd-shutdown which solves the problem. I'm happy to go through and make a distinct type of systemd-shutdown if someone doesn't think it is a good idea to share the type with systemd. But based on what is going on, this might be reasonable.
Signed-off-by: Dave Sugar <dsugar@tresys.com>
Label RHEL specific systemd binaries /usr/lib/systemd/rhel* as initrc_exec_t.
Now in the proper location.
Signed-off-by: Dave Sugar <dsugar@tresys.com>
On systems such as Arch Linux, all programs which are usually located in
/bin, /sbin, /usr/bin and /usr/sbin are present in /usr/bin and the
other locations are symbolic links to this directory. With such a
configuration, the file contexts which define types for files in
/bin, /sbin and /usr/sbin need to be duplicated to provide definitions
for /usr/bin/...
As the "/bin vs. /usr/bin" part of the needed definitions has already
been done with the "usr merge" patches, the next step consists in
duplicating file contexts for /usr/sbin. This is what this patch does
for all modules which are not in contrib.
This is the second iteration of an idea I have previously posted on
http://oss.tresys.com/pipermail/refpolicy/2017-March/009176.html
Here's the latest version of my patch to remove all /var/run when it's not
needed. I have removed the subst thing from the patch, but kept a
distro_debian bit that relies on it. So with this patch the policy won't
install if you build it with distro_debian unless you have my subst patch.
Chris, if your automated tests require that it build and install with
distro_debian then skip the patch for sysnetwork.fc.
From Russell Coker
Some policy modules define file contexts in /bin, /sbin and /lib without
defining similar file contexts in the same directory under /usr.
Add these missing file contexts when there are outside ifdef blocks.
Remove file context aliases and update file context paths to use the /run filesystem path.
Add backward compatibility file context alias for /var/run using applications like https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=783321
Lock files are still seated at /var/lock
The Gentoo-specific runscripts in /sbin should not be marked as initrc_exec_t
anymore (just bin_t).
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Introduce the substitutions for the /usr/local/lib* locations (towards /usr/lib)
and /etc/init.d (towards /etc/rc.d/init.d).
Update the file contexts of the translated locations.
Rebased (collided with Guido's patch for commenting within the
file_contexts.subs_dist file) since v3.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Now that we have file_contexts.subs_dist, translations that were put in the file context definition files can now be
cleaned up.
Differences from v1:
- removes a few duplicate entries in the libraries.fc file, and
- removes the contrib references
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Within Gentoo, the init system (openrc) uses a single binary (/sbin/rc)
for all its functions, be it executing init scripts, managing runlevels,
checking state, etc. This binary is not allowed to be labeled
initrc_exec_t as that would trigger domain transitions where this isn't
necessary (or even allowed).
A suggested solution is to use a separate type declaration for /sbin/rc
(rc_exec_t) which transitions where necessary.
This patch includes support for the /sbin/rc rc_exec_t type and declares
the init_rc_exec() interface which allows domains to execute the binary
without transitioning.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Current policy sets /lib(32|64)?/rc/init.d to lib_t. This causes
problems for DHCP among other things, as the initrc domain does not
have permissions to perform some operations. Changing to
initrc_state_t (the labeling used for /var/lib/init.d by
the older baselayout-1) resolves some of these issues.
Signed-off-by: Chris Richards <gizmo@giz-works.com>
Chris PeBenito
Nicolas Iooss
James Carter
David Sugar
cgzones
Chris PeBenito
Laurent Bigonville
Sven Vermeulen
Guido Trentalancia
Chris Richards