systemd: fix segfault on shutdown

This applies upstream fixes to fix a segfault in systemd-logind on
shutdown.

[Fixes YOCTO #9265]

(From OE-Core rev: 4939402d8c67d68e20618cdfdd091bd8cc3f535a)

Signed-off-by: Bill Randle <william.c.randle@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/systemd/systemd/0023-backported-fixes-for-null-messages.patch

@@ -0,0 +1,101 @@
+From ce88232a1c8e914936e18edbee2551ab95fc4c1d Mon Sep 17 00:00:00 2001
+From: Bill Randle <william.c.randle@intel.com>
+Date: Mon, 21 Mar 2016 15:52:30 -0700
+Subject: [PATCH] backported fixes for null messages
+
+Apply upstream commits 5744f59a3ee883ef3a78214bd5236157acdc35ba,
+2cf088b56d72cb6a3243041524f1fbae7c1cb28e and
+c7430c3d1a0c14aed631864b9da504ba1a9352c2 to fix Yocto #9265.
+
+Upstream-Status: Backport
+
+Signed-off-by: Bill Randle <william.c.randle@intel.com>
+---
+ src/login/logind-dbus.c | 31 ++++++++++++++++++-------------
+ 1 file changed, 18 insertions(+), 13 deletions(-)
+
+diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
+index 5b2b36b..e433549 100644
+--- a/src/login/logind-dbus.c
++++ b/src/login/logind-dbus.c
+@@ -1339,8 +1339,7 @@ static int bus_manager_log_shutdown(
+                 InhibitWhat w,
+                 const char *unit_name) {
+ 
+-        const char *p;
+-        const char *q;
++        const char *p, *q;
+ 
+         assert(m);
+         assert(unit_name);
+@@ -1365,8 +1364,8 @@ static int bus_manager_log_shutdown(
+                 q = NULL;
+         }
+ 
+-        if (m->wall_message)
+-                p = strjoina(p, " (", m->wall_message, ")", NULL);
++        if (!isempty(m->wall_message))
++                p = strjoina(p, " (", m->wall_message, ")");
+ 
+         return log_struct(LOG_NOTICE,
+                           LOG_MESSAGE_ID(SD_MESSAGE_SHUTDOWN),
+@@ -1797,9 +1796,11 @@ static int update_schedule_file(Manager *m) {
+         if (r < 0)
+                 return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
+ 
+-        t = cescape(m->wall_message);
+-        if (!t)
+-                return log_oom();
++        if (!isempty(m->wall_message)) {
++                t = cescape(m->wall_message);
++                if (!t)
++                        return log_oom();
++        }
+ 
+         r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
+         if (r < 0)
+@@ -1815,7 +1816,7 @@ static int update_schedule_file(Manager *m) {
+                 m->enable_wall_messages,
+                 m->scheduled_shutdown_type);
+ 
+-        if (!isempty(m->wall_message))
++        if (t)
+                 fprintf(f, "WALL_MESSAGE=%s\n", t);
+ 
+         r = fflush_and_check(f);
+@@ -2294,7 +2295,7 @@ static int method_set_wall_message(
+         int r;
+         Manager *m = userdata;
+         char *wall_message;
+-        bool enable_wall_messages;
++        int enable_wall_messages;
+ 
+         assert(message);
+         assert(m);
+@@ -2310,15 +2311,19 @@ static int method_set_wall_message(
+                                     UID_INVALID,
+                                     &m->polkit_registry,
+                                     error);
+-
+         if (r < 0)
+                 return r;
+         if (r == 0)
+                 return 1; /* Will call us back */
+ 
+-        r = free_and_strdup(&m->wall_message, wall_message);
+-        if (r < 0)
+-                return log_oom();
++        if (isempty(wall_message))
++                m->wall_message = mfree(m->wall_message);
++        else {
++                r = free_and_strdup(&m->wall_message, wall_message);
++                if (r < 0)
++                        return log_oom();
++        }
++
+         m->enable_wall_messages = enable_wall_messages;
+ 
+         return sd_bus_reply_method_return(message, NULL);
+-- 
+2.5.0
+

meta/recipes-core/systemd/systemd_225.bb

@@ -46,6 +46,7 @@ SRC_URI = "git://github.com/systemd/systemd.git;protocol=git \
            file://init \
            file://run-ptest \
            file://rules-whitelist-hd-devices.patch \
+           file://0023-backported-fixes-for-null-messages.patch \
           "
 SRC_URI_append_qemuall = " file://qemuall_io_latency-core-device.c-Change-the-default-device-timeout-to-2.patch"