BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.15.0-rc7-syzkaller-g187899f4124a #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: btrfs-delalloc btrfs_work_helper Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (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:3856 [inline] validate_chain kernel/locking/lockdep.c:3877 [inline] __lock_acquire+0xf50/0x3058 kernel/locking/lockdep.c:5235 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1693 btrfs_tree_lock_nested+0x44/0x2f4 fs/btrfs/locking.c:188 btrfs_tree_lock fs/btrfs/locking.h:179 [inline] btrfs_search_slot+0x1070/0x21f0 fs/btrfs/ctree.c:2186 btrfs_lookup_file_extent+0xd8/0x128 fs/btrfs/file-item.c:265 btrfs_drop_extents+0x348/0x21dc fs/btrfs/file.c:188 __cow_file_range_inline+0x1ec/0xf04 fs/btrfs/inode.c:631 cow_file_range_inline+0x27c/0x338 fs/btrfs/inode.c:690 cow_file_range+0x324/0xc68 fs/btrfs/inode.c:1310 run_delalloc_cow+0x88/0x11c fs/btrfs/inode.c:1702 submit_uncompressed_range+0x108/0x310 fs/btrfs/inode.c:1083 submit_one_async_extent fs/btrfs/inode.c:1135 [inline] submit_compressed_extents+0x620/0x1280 fs/btrfs/inode.c:1591 run_ordered_work fs/btrfs/async-thread.c:244 [inline] btrfs_work_helper+0x52c/0xca8 fs/btrfs/async-thread.c:323 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847