fix a heap overrun

diff --git a/proto-shell.c b/proto-shell.c
index 5937e52..555004e 100644 (file)
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -382,11 +382,11 @@ proto_shell_parse_config(struct config_param_list *config, json_object *obj)
        int str_len = 0;
        int i;
 
-       attrs = calloc(1, sizeof(*attrs));
+       config->n_params = json_object_array_length(obj);
+       attrs = calloc(1, sizeof(*attrs) * config->n_params);
        if (!attrs)
                return NULL;
 
-       config->n_params = json_object_array_length(obj);
        config->params = attrs;
        for (i = 0; i < config->n_params; i++) {
                json_object *cur, *name, *type;