From f86ea9406910ac6da1dd84f2410ebddffbbdeed6 Mon Sep 17 00:00:00 2001
From: Simon McVittie <simon.mcvittie@collabora.co.uk>
Date: Mon, 26 Jan 2015 20:09:56 +0000
Subject: [PATCH 4/4] Prevent forged ActivationFailure messages from non-root
 processes

This is redundant with the code fix but is likely to be easier to
backport.
---
 bus/system.conf.in | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/bus/system.conf.in b/bus/system.conf.in
index c1541bf..f66ea40 100644
--- a/bus/system.conf.in
+++ b/bus/system.conf.in
@@ -73,6 +73,8 @@
           send_member="UpdateActivationEnvironment"/>
     <deny send_destination="org.freedesktop.DBus"
           send_interface="org.freedesktop.DBus.Debug.Stats"/>
+    <deny send_destination="org.freedesktop.DBus"
+          send_interface="org.freedesktop.systemd1.Activator"/>
   </policy>
 
   <!-- If the Stats interface was enabled at compile-time, root may use it.
@@ -83,6 +85,12 @@
            send_interface="org.freedesktop.DBus.Debug.Stats"/>
   </policy>
 
+  <!-- Only systemd, which runs as root, may report activation failures. -->
+  <policy user="root">
+    <allow send_destination="org.freedesktop.DBus"
+           send_interface="org.freedesktop.systemd1.Activator"/>
+  </policy>
+
   <!-- Config files are placed here that among other things, punch 
        holes in the above policy for specific services. -->
   <includedir>system.d</includedir>
-- 
2.1.4