systemd: Fix a systemd crash when doing "systemctl list-unit-files"

pkgs/os-specific/linux/systemd/default.nix

@@ -17,6 +17,7 @@ stdenv.mkDerivation rec {
     [ ./reexec.patch
       ./ignore-duplicates.patch
       ./crypt-devices-are-ready.patch
+      ./listunitfiles-abort.patch
     ];
 
   buildInputs =

pkgs/os-specific/linux/systemd/listunitfiles-abort.patch

@@ -0,0 +1,20 @@
+diff --git a/src/core/dbus-manager.c b/src/core/dbus-manager.c
+index ed9784b..6d045cc 100644
+--- a/src/core/dbus-manager.c
++++ b/src/core/dbus-manager.c
+@@ -491,7 +491,6 @@ static DBusMessage *message_from_file_changes(
+         return reply;
+ 
+ oom:
+-        dbus_message_unref(reply);
+         return NULL;
+ }
+ 
+@@ -1432,7 +1431,6 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
+                 r = unit_file_get_list(m->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, NULL, h);
+                 if (r < 0) {
+                         unit_file_list_free(h);
+-                        dbus_message_unref(reply);
+                         return bus_send_error_reply(connection, message, NULL, r);
+                 }
+