BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 PID: 9022 Comm: kworker/u4:15 Not tainted 6.6.0-rc4-syzkaller-g19af4a4ed414 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: btrfs-endio-write btrfs_work_helper Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __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:3815 [inline] validate_chain kernel/locking/lockdep.c:3836 [inline] __lock_acquire+0x1c60/0x75e8 kernel/locking/lockdep.c:5136 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 __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:3678 find_free_extent+0x27b4/0x4eb4 fs/btrfs/extent-tree.c:4389 btrfs_reserve_extent+0x35c/0x674 fs/btrfs/extent-tree.c:4516 btrfs_alloc_tree_block+0x1b0/0x1444 fs/btrfs/extent-tree.c:4931 split_leaf+0x8d0/0x119c fs/btrfs/ctree.c:3853 search_leaf fs/btrfs/ctree.c:2043 [inline] btrfs_search_slot+0x220c/0x29d8 fs/btrfs/ctree.c:2230 btrfs_csum_file_blocks+0x3d0/0x1554 fs/btrfs/file-item.c:1122 add_pending_csums fs/btrfs/inode.c:2601 [inline] btrfs_finish_one_ordered+0xf1c/0x1770 fs/btrfs/inode.c:3121 btrfs_finish_ordered_io+0xf8/0x10c fs/btrfs/inode.c:3229 finish_ordered_fn+0x20/0xa8 fs/btrfs/ordered-data.c:303 btrfs_work_helper+0x340/0x1504 fs/btrfs/async-thread.c:314 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857