BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 PID: 4143 Comm: kworker/u4:11 Not tainted 6.7.0-rc6-syzkaller-gaafe7ad77b91 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Workqueue: btrfs-endio-write btrfs_work_helper Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 lookup_chain_cache_add kernel/locking/lockdep.c:3816 [inline] validate_chain kernel/locking/lockdep.c:3837 [inline] __lock_acquire+0x1c58/0x763c kernel/locking/lockdep.c:5137 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] btrfs_add_reserved_bytes+0x70/0xd44 fs/btrfs/block-group.c:3664 find_free_extent+0x27c4/0x4eac fs/btrfs/extent-tree.c:4555 btrfs_reserve_extent+0x35c/0x674 fs/btrfs/extent-tree.c:4682 btrfs_alloc_tree_block+0x1b4/0x1324 fs/btrfs/extent-tree.c:5138 btrfs_force_cow_block+0x4b8/0x1a30 fs/btrfs/ctree.c:563 btrfs_cow_block+0x314/0xa0c fs/btrfs/ctree.c:741 btrfs_search_slot+0xb8c/0x29d8 btrfs_lookup_csum+0x164/0x500 fs/btrfs/file-item.c:222 btrfs_csum_file_blocks+0x2a4/0x1550 fs/btrfs/file-item.c:1071 add_pending_csums fs/btrfs/inode.c:2604 [inline] btrfs_finish_one_ordered+0x8d0/0x1298 fs/btrfs/inode.c:3128 btrfs_finish_ordered_io+0x124/0x138 fs/btrfs/inode.c:3237 finish_ordered_fn+0x20/0xa8 fs/btrfs/ordered-data.c:303 btrfs_work_helper+0x358/0x14f8 fs/btrfs/async-thread.c:315 process_one_work+0x694/0x1204 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2781 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857