issue loading dev dashboard with selinux on

[johrstrom]

I'm currently getting the error: stringio.so: failed to map segment from shared object while trying to boot the dev dashboard in our dev system that uses selinux.

The audit.log message is below.

type=AVC msg=audit(1764177815.282:1457597): avc:  denied  { execute } for  pid=1714881 comm="ruby" path="/users/PZS0714/johrstrom/ondemand/src/apps/dashboard/vendor/bundle/ruby/3.3.0/gems/stringio-3.1.8/lib/stringio.so" dev="0:49" ino=4376752 scontext=system_u:system_r:ood_pun_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=file permissive=0

Not sure if we can fix for 4.1 - I certainly can't.

[treydock]

This needs ondemand_use_nfs and use_nfs_home_dirs booleans enabled https://osc.github.io/ood-documentation/latest/installation/modify-system-security.html

[treydock]

Those booleans are supposed to be enabled by default however. So maybe there is a gap. Run the command in docs:

cat /var/log/audit/audit.log | audit2allow -M ood

And share ood.te contents.

[johrstrom]

Here's the output of that command. I don't see any reference to ood.te.

******************** IMPORTANT ***********************
To make this policy package active, execute:

semodule -i ood.pp

[treydock]

It should be in same CWD as ood.pp. If you leave off -M ood it should print the policy but the policy with -M ood should have been written to ood.te in same directory as ood.pp.

[johrstrom]

🤦‍♂️ didn't realize that command wrote files out. Here's the ood.te:

Details

module ood 1.0;

require {
        type sysfs_t;
        type systemd_userdbd_runtime_t;
        type nfs_t;
        type ood_apps_public_t;
        type httpd_t;
        type var_lib_t;
        type ood_pun_t;
        type admin_home_t;
        class file { execute map read };
        class dir { create read };
}

#============= httpd_t ==============

#!!!! This avc can be allowed using the boolean 'domain_can_mmap_files'
allow httpd_t ood_apps_public_t:file map;

#============= ood_pun_t ==============
allow ood_pun_t admin_home_t:dir create;
allow ood_pun_t nfs_t:file execute;
allow ood_pun_t sysfs_t:file read;
allow ood_pun_t systemd_userdbd_runtime_t:dir read;
allow ood_pun_t var_lib_t:file read;

[treydock]

module ood 1.0;

require {
        type sysfs_t;
        type systemd_userdbd_runtime_t;
        type nfs_t;
        type ood_apps_public_t;
        type httpd_t;
        type var_lib_t;
        type ood_pun_t;
        type admin_home_t;
        class file { execute map read };
        class dir { create read };
}

#============= ood_pun_t ==============
allow ood_pun_t nfs_t:file execute;

Try making that file then do:

make -f /usr/share/selinux/devel/Makefile
semodule -i ood.pp

Then see if that solves the problem. The other denials might just be noise but would need to see the auditd logs to know. Is this on OSC host where I can look or somewhere else?

[treydock]

diff --git a/packaging/rpm/ondemand-selinux.te b/packaging/rpm/ondemand-selinux.te
index ef3ecbd46..c9b46fd79 100644
--- a/packaging/rpm/ondemand-selinux.te
+++ b/packaging/rpm/ondemand-selinux.te
@@ -149,14 +149,11 @@ tunable_policy(`ondemand_manage_vmblock',`
 gen_tunable(ondemand_use_nfs, true)

 tunable_policy(`ondemand_use_nfs && use_nfs_home_dirs',`
-  require {
-    type nfs_t;
-  }
   fs_list_auto_mountpoints(ood_pun_t)
        fs_manage_nfs_dirs(ood_pun_t)
+  fs_exec_nfs_files(ood_pun_t)
        fs_manage_nfs_files(ood_pun_t)
        fs_manage_nfs_symlinks(ood_pun_t)
-  allow ood_pun_t nfs_t:file { map };
 ')
 optional_policy(`
     tunable_policy(`ondemand_use_nfs && use_nfs_home_dirs',`

I think this will solve the execute issue.