Please be careful!
I’ve got heavy F2FS filesystem corruption on 5.18.3 on two of my machines. With 5.18.3 installed, lots of smaller files became inaccessible (it worked OK on both 5.17.9 and 5.18.1 taken from unstable branch).
The error says “the structure needs cleanup”
Fortunately the damage is not permanent and all files are accessible again when kernel is downgraded.
Not all F2FS partitions are affected, but 2 out of 5 are.