BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 2564 Comm: kworker/u8:7 Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: btrfs-endio-write 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 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 debug_object_activate+0x7c/0x460 lib/debugobjects.c:818 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline] __call_rcu_common kernel/rcu/tree.c:3067 [inline] call_rcu+0x50/0x96c kernel/rcu/tree.c:3202 release_extent_buffer+0x1dc/0x2dc fs/btrfs/extent_io.c:3453 free_extent_buffer_stale+0x14c/0x1ec fs/btrfs/extent_io.c:3502 btrfs_force_cow_block+0xcec/0x1bb8 fs/btrfs/ctree.c:594 btrfs_cow_block+0x3f8/0x838 fs/btrfs/ctree.c:688 btrfs_search_slot+0x9c0/0x21f0 fs/btrfs/ctree.c:2088 btrfs_lookup_file_extent+0xd8/0x128 fs/btrfs/file-item.c:265 btrfs_drop_extents+0x348/0x21dc fs/btrfs/file.c:188 insert_reserved_file_extent+0x254/0x7a4 fs/btrfs/inode.c:2969 insert_ordered_extent_file_extent fs/btrfs/inode.c:3073 [inline] btrfs_finish_one_ordered+0x91c/0x17f8 fs/btrfs/inode.c:3191 btrfs_finish_ordered_io+0x120/0x134 fs/btrfs/inode.c:3333 finish_ordered_fn+0x20/0x30 fs/btrfs/ordered-data.c:331 btrfs_work_helper+0x380/0xca8 fs/btrfs/async-thread.c:313 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:862