From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 17 Dec 2013 00:02:13 +0000 (+0100)
Subject: core: always create /dev/kdbus/ns (and make it private 0700) after setting up the... 
X-Git-Tag: v209~885
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=d003f514dab2dbf1a66e11800a50aeaf039d036c

core: always create /dev/kdbus/ns (and make it private 0700) after setting up the kdbus system bus
---

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;