In the Linux kernel, the following vulnerability has been resolved:
f2fs: compress: fix to cover {reserve,release}compressblocks() w/ cp_rwsem lock
It needs to cover {reserve,release}compressblocks() w/ cprwsem lock to avoid racing with checkpoint, otherwise, filesystem metadata including blkaddr in dnode, inode fields and .totalvalidblockcount may be corrupted after SPO case.