[tests/selinux] pr775-checkpolicy-revdeps: test if fapolicyd can talk to D-bus daemon

[tests/selinux] pr775-checkpolicy-revdeps: test if fapolicyd can talk to D-bus daemon

[Milos Malik]

            A new commit has been pushed.

            Repo   : tests/selinux
            Branch : pr775-checkpolicy-revdeps
            Commit : 8c8d3ba91ee770cf4c3e14aceab39a7d412e4b45
            Author : Milos Malik <mmalik@redhat.com>
            Date   : 2020-10-20T19:09:39+00:00
            Stats  : +10/-0 in 2 file(s)
            URL    : https://src.fedoraproject.org/tests/selinux/c/8c8d3ba91ee770cf4c3e14aceab39a7d412e4b45?branch=pr775-checkpolicy-revdeps

            Log:
            test if fapolicyd can talk to D-bus daemon

Based on the content of reported SELinux denials, the fapolicyd
service (after its start) wants to communicate with D-bus daemon,
but SELinux policy does not allow that action. I believe this
behaviour is expected and it should be allowed in fapolicyd
SELinux module.

The automated TC looks for appropriate allow rules and it also
reproduces the issue.

The TC covers BZ#1874491.

---
diff --git a/selinux-policy/fapolicyd-and-similar/Makefile b/selinux-policy/fapolicyd-and-similar/Makefile
index d75d14e..aa9fa7a 100644
--- a/selinux-policy/fapolicyd-and-similar/Makefile
+++ b/selinux-policy/fapolicyd-and-similar/Makefile
@@ -64,6 +64,7 @@ $(METADATA): Makefile
 	@echo "Destructive:     no" >> $(METADATA)
 	@echo "Releases:        -RHEL4 -RHEL5 -RHEL6 -RHEL7" >> $(METADATA)
 	@echo "Bug:             1865818" >> $(METADATA) # RHEL-8
+	@echo "Bug:             1874491" >> $(METADATA) # Fedora 33
 
 	rhts-lint $(METADATA)
 

diff --git a/selinux-policy/fapolicyd-and-similar/runtest.sh b/selinux-policy/fapolicyd-and-similar/runtest.sh
index 3e69b01..f8ed470 100755
--- a/selinux-policy/fapolicyd-and-similar/runtest.sh
+++ b/selinux-policy/fapolicyd-and-similar/runtest.sh
@@ -63,6 +63,15 @@ rlJournalStart
         rlSESearchRule "allow ${PROCESS_CONTEXT} net_conf_t : lnk_file { getattr read } [ ]"
     rlPhaseEnd
 
+    rlPhaseStartTest "bz#1874491"
+        rlSEMatchPathCon "/usr/sbin/fapolicyd" ${FILE_CONTEXT}
+        rlSEMatchPathCon "/run/dbus/system_bus_socket" "system_dbusd_var_run_t"
+        rlSESearchRule "allow fapolicyd_t system_dbusd_var_run_t : sock_file { write } [ ]"
+        rlSESearchRule "allow fapolicyd_t system_dbusd_t : unix_stream_socket { connectto } [ ]"
+        rlSESearchRule "allow fapolicyd_t system_dbusd_t : dbus { send_msg } [ ]"
+        rlSESearchRule "allow system_dbusd_t fapolicyd_t : dbus { send_msg } [ ]"
+    rlPhaseEnd
+
     rlPhaseStartTest "real scenario -- standalone service"
         rlRun "echo ${ROOT_PASSWORD} | passwd --stdin root"
         if ! rlSEDefined ${PROCESS_CONTEXT} ; then