BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 42 Comm: kworker/u8:3 Not tainted 6.16.0-rc2-syzkaller-g9aa9b43d689e #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: btrfs-delalloc btrfs_work_helper Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (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:3858 [inline] validate_chain kernel/locking/lockdep.c:3879 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5240 reacquire_held_locks+0x13c/0x1f8 kernel/locking/lockdep.c:5388 __lock_release kernel/locking/lockdep.c:5577 [inline] lock_release+0x198/0x39c kernel/locking/lockdep.c:5892 up_write+0x3c/0x5b4 kernel/locking/rwsem.c:1629 btrfs_tree_unlock+0xdc/0x298 fs/btrfs/locking.c:200 btrfs_tree_unlock_rw fs/btrfs/locking.h:216 [inline] btrfs_unlock_up_safe+0x164/0x31c fs/btrfs/locking.c:224 setup_items_for_insert+0x154/0x9c4 fs/btrfs/ctree.c:4179 btrfs_setup_item_for_insert+0xcc/0x114 fs/btrfs/ctree.c:4266 btrfs_drop_extents+0x1904/0x21e4 fs/btrfs/file.c:496 __cow_file_range_inline+0x1ec/0xf14 fs/btrfs/inode.c:631 cow_file_range_inline+0x27c/0x338 fs/btrfs/inode.c:690 compress_file_range+0x788/0xe28 fs/btrfs/inode.c:-1 btrfs_work_helper+0x380/0xca8 fs/btrfs/async-thread.c:312 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847