ovl: fix tmpfile leak
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 v6.1.9 by commit caa0ea92503f8afa1941f6ac899e5c4e3f6ec8bb, it was introduced in version v6.1 by commit 2b1a77461f1602f870d6fe61fc65610bb8c8dd05. For more details please see the references link.