misc: fastrpc: Add missing lock before accessing find_vma()
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 v5.15 by commit f9a470db2736b01538ad193c316eb3f26be37d58, it was introduced in version v5.2 by commit 80f3afd72bd4149c57daf852905476b43bb47647. For more details please see the references link.