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 v4.14.237 by commit 17dab9326ff263c62dab1dbac4492e2938a049e4. For more details please see the references link.