From d003f514dab2dbf1a66e11800a50aeaf039d036c Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 17 Dec 2013 01:02:13 +0100
Subject: [PATCH] core: always create /dev/kdbus/ns (and make it private 0700)
 after setting up the kdbus system bus

---
 src/core/manager.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/core/manager.c b/src/core/manager.c
index a2f3570bb..6a755975f 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -427,6 +427,12 @@ static int manager_setup_kdbus(Manager *m) {
         }
 
         log_debug("Successfully set up kdbus on %s", p);
+
+        /* Create the namespace directory here, so that the contents
+         * of that directory is not visible to non-root users. This is
+         * necessary to ensure that users cannot get access to busses
+         * of virtualized users when no UID namespacing is used. */
+        mkdir_p_label("/dev/kdbus/ns", 0700);
 #endif
 
         return 0;
-- 
2.30.2