drm: Prevent drmcopyfield() to attempt copying a NULL pointer
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 v5.15.75 by commit ca163e389f0ae096a4e1e19f0a95e60ed80b4e31. For more details please see the references link.