drm: Fix use-after-free read in drm_getunique()
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 v4.19.195 by commit 7d233ba700ceb593905ea82b42dadb4ec8ef85e9. For more details please see the references link.