BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 3470 Comm: kworker/u8:14 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: btrfs-endio-write btrfs_work_helper Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 local_lock_acquire+0x4c/0x19c include/linux/local_lock_internal.h:41 __folio_batch_add_and_move+0x1c4/0x590 mm/swap.c:-1 folio_add_lru+0xc0/0x150 mm/swap.c:511 filemap_add_folio+0x584/0x814 mm/filemap.c:982 attach_eb_folio_to_filemap fs/btrfs/extent_io.c:3314 [inline] alloc_extent_buffer+0x544/0x2128 fs/btrfs/extent_io.c:3444 btrfs_find_create_tree_block+0x3c/0x50 fs/btrfs/disk-io.c:614 btrfs_init_new_buffer fs/btrfs/extent-tree.c:5049 [inline] btrfs_alloc_tree_block+0x1b4/0xe38 fs/btrfs/extent-tree.c:5162 btrfs_force_cow_block+0x404/0x2058 fs/btrfs/ctree.c:517 btrfs_cow_block+0x328/0x940 fs/btrfs/ctree.c:708 btrfs_search_slot+0x96c/0x2228 fs/btrfs/ctree.c:2130 btrfs_lookup_file_extent+0xd8/0x128 fs/btrfs/file-item.c:266 btrfs_drop_extents+0x330/0x245c fs/btrfs/file.c:186 insert_reserved_file_extent+0x254/0x7a4 fs/btrfs/inode.c:2985 insert_ordered_extent_file_extent fs/btrfs/inode.c:3087 [inline] btrfs_finish_one_ordered+0xb7c/0x1b48 fs/btrfs/inode.c:3208 btrfs_finish_ordered_io+0x120/0x134 fs/btrfs/inode.c:3350 finish_ordered_fn+0x20/0x30 fs/btrfs/ordered-data.c:347 btrfs_work_helper+0x360/0xca8 fs/btrfs/async-thread.c:312 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844