From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Thu, 14 Feb 2019 10:59:13 +0900
Subject: login: add a missing error check for session_set_leader()

session_set_leader() may fail. If it fails, then manager_start_scope()
will trigger assertion.

This may be related to RHBZ#1663704.

(cherry picked from commit fe3ab8458b9c0ead4b3e14ac25b342d8c34376fe)
---
 src/login/logind-dbus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 8ab498f..b9ea370 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -790,7 +790,9 @@ static int method_create_session(sd_bus_message *message, void *userdata, sd_bus
                 goto fail;
 
         session_set_user(session, user);
-        session_set_leader(session, leader);
+        r = session_set_leader(session, leader);
+        if (r < 0)
+                goto fail;
 
         session->type = t;
         session->class = c;