virtiofs: fix memory leak in virtiofsprobe()
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 v5.12.3 by commit 5116e79fc6e6725b8acdad8b7e928a83ab7b47e6, it was introduced in version v5.4 by commit a62a8ef9d97da23762a588592c8b8eb50a8deb6a. For more details please see the references link.