videoroom: check participant before dereference (#3259)

Refs #3249
meetecho · Aug 29, 2023 · 2db954b · 2db954b
1 parent 7c7093e
commit 2db954b
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/plugins/janus_videoroom.c b/src/plugins/janus_videoroom.c
@@ -11606,6 +11606,12 @@ static void *janus_videoroom_handler(void *data) {
 			} else {
 				/* This is a new publisher, or an updated one */
 				participant = janus_videoroom_session_get_publisher(session);
+				if(participant == NULL) {
+					JANUS_LOG(LOG_ERR, "Invalid participant instance\n");
+					error_code = JANUS_VIDEOROOM_ERROR_UNKNOWN_ERROR;
+					g_snprintf(error_cause, 512, "Invalid participant instance");
+					goto error;
+				}
 				janus_videoroom *videoroom = participant->room;
 				int count = 0;
 				GHashTableIter iter;