Vulnerability Advisory : Bluetooth: hci_sync: fix leaks when hci_cmd_sync_queue_once fails with undefined Attack Complexity

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix leaks when hci_cmd_sync_queue_once fails When hci_cmd_sync_queue_once() returns with error, the destroy callback will not be called. Fix leaking references / memory on these failures.