CVE-2026-89833

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to avoid potential deadloop in f2fs_fsync_node_pages()

There is potential deadloop in race condition:

Thread A Thread B

- fsync

- f2fs_do_sync_file

- f2fs_fsync_node_pages

- last_fsync_dnode

- folio_get(last_folio)

- f2fs_setattr

- f2fs_truncate

- f2fs_truncate_blocks

- f2fs_do_truncate_blocks

- f2fs_truncate_inode_blocks

- truncate_dnode

- truncate_node

- invalidate_mapping_pages

- folio->mapping = NULL

- is_node_folio alwasy return false

- atomic && !marked is always true,

then goto retry