f2fs: fix dereference of stale list iterator after loop body
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 v5.4.198 by commit 5e47a7add3dda7f236548c5ec3017776dc2a729f, it was introduced in version v4.12 by commit 8c242db9b8c01b252290e23827163787f07e01d1. For more details please see the references link.