userfaultfd: release page in error path to avoid BUG_ON
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 v5.12.5 by commit 2d59a0ed8b26b8f3638d8afc31f839e27759f1f6, it was introduced in version v4.11 by commit cb658a453b9327ce96ce5222c24d162b5b65b564. For more details please see the references link.