NFC: NULL out the dev->rfkill to prevent UAF
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.198 by commit fbf9c4c714d3cdeb98b6a18e4d057f931cad1d81, it was introduced in version v5.4.162 by commit 307d2e6cebfca9d92f86c8e2c8e3dd4a8be46ba6. For more details please see the references link.