ubusd_proto: fix crash when trying to subscribe to system objects

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/ubusd_proto.c b/ubusd_proto.c
index 53e507a..b591384 100644 (file)
--- a/ubusd_proto.c
+++ b/ubusd_proto.c
@@ -377,7 +377,7 @@ static int ubusd_handle_add_watch(struct ubus_client *cl, struct ubus_msg_buf *u
                return UBUS_STATUS_INVALID_ARGUMENT;
 
        target = ubusd_find_object(blob_get_u32(attr[UBUS_ATTR_TARGET]));
                return UBUS_STATUS_INVALID_ARGUMENT;
 
        target = ubusd_find_object(blob_get_u32(attr[UBUS_ATTR_TARGET]));

-       if (!target)
+       if (!target || !target->client)

                return UBUS_STATUS_NOT_FOUND;
 
        if (cl == target->client)
                return UBUS_STATUS_NOT_FOUND;
 
        if (cl == target->client)