nvmet: fix memory leak in nvmetallocctrl()
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 v5.12.7 by commit afb680ed7ecbb7fd66ddb43650e9b533fd8b4b9a, it was introduced in version v5.7 by commit 94a39d61f80fcd679debda11e1ca02b88d90e67e. For more details please see the references link.