ubus: duplicate request buffer to avoid memory corruption with multiple requests

diff --git a/ubus.c b/ubus.c
index 303f05e..d035439 100644 (file)
--- a/ubus.c
+++ b/ubus.c
@@ -368,10 +368,12 @@ static bool parse_json_rpc(struct rpc_data *d, struct blob_attr *data)
        if (!cur)
                return true;
 
-       d->params = cur;
+       d->params = blob_memdup(cur);
+       if (!d->params)
+               return false;
 
        blobmsg_parse_array(data_policy, ARRAY_SIZE(data_policy), tb2,
-                           blobmsg_data(cur), blobmsg_data_len(cur));
+                           blobmsg_data(d->params), blobmsg_data_len(d->params));
 
        if (tb2[0])
                d->object = blobmsg_data(tb2[0]);
@@ -465,11 +467,11 @@ static void uh_ubus_handle_request_object(struct client *cl, struct json_object
                }
 
                uh_ubus_send_request(cl, obj, data.data);
-               return;
+               goto out;
        }
        else if (!strcmp(data.method, "list")) {
                uh_ubus_send_list(cl, obj, data.params);
-               return;
+               goto out;
        }
        else {
                err = ERROR_METHOD;
@@ -478,6 +480,9 @@ static void uh_ubus_handle_request_object(struct client *cl, struct json_object
 
 error:
        uh_ubus_json_error(cl, err);
+out:
+       if (data.params)
+               free(data.params);
 }
 
 static void __uh_ubus_next_batched_request(struct uloop_timeout *timeout)