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-rw-r--r--src/libsystemd-bus/bus-message.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c
index e68b43bbae..437f6dfd49 100644
--- a/src/libsystemd-bus/bus-message.c
+++ b/src/libsystemd-bus/bus-message.c
@@ -1347,14 +1347,29 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
switch (type) {
case SD_BUS_TYPE_STRING:
+ /* To make things easy we'll serialize a NULL string
+ * into the empty string */
+ p = strempty(p);
+
+ /* Fall through... */
case SD_BUS_TYPE_OBJECT_PATH:
+ if (!p) {
+ r = -EINVAL;
+ goto fail;
+ }
+
align = 4;
sz = 4 + strlen(p) + 1;
break;
case SD_BUS_TYPE_SIGNATURE:
+ if (!p) {
+ r = -EINVAL;
+ goto fail;
+ }
+
align = 1;
sz = 1 + strlen(p) + 1;
break;