SUNRPC: Ensure we flush any closed sockets before xsxprtfree()
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 v5.16.20 by commit 7a0921a23cae42e9fa5ce964f6907181b6dc80d8, it was introduced in version v5.1 by commit a73881c96d73ee72b7dbbd38a6eeef66182a8ef7. For more details please see the references link.