diff --git a/common/app.c b/common/app.c
line changes: +5/-0
index 2fad96e..01d5768
--- a/common/app.c
+++ b/common/app.c

@@ -42,6 +42,11 @@ int parse_url_info(const char *url, struct url_info *info) {
 }
 
 int parse_auth_cookie(const char *str, struct auth_cookie *cookie) {
+	if (str == NULL)
+		return 0;
+	if (cookie == NULL)
+		return 0;
+
 	char *token_begin = strchr(str, '/');
 	if (token_begin == NULL) {
 		return 0;