f2fs: let's avoid panic if extent_tree is not created
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 v6.1.8 by commit 1c38cdc747f00daf7394535eae5afc4c503c59bb. For more details please see the references link.