BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 1985 Comm: kworker/u8:9 Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: btrfs-endio-write btrfs_work_helper
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 dump_stack+0x1c/0x28 lib/dump_stack.c:123
 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+0x248/0x73c kernel/locking/lockdep.c:5754
 down_read+0x58/0x2fc kernel/locking/rwsem.c:1526
 find_free_extent+0x13d8/0x4bd4 fs/btrfs/extent-tree.c:4484
 btrfs_reserve_extent+0x35c/0x674 fs/btrfs/extent-tree.c:4717
 btrfs_alloc_tree_block+0x1b4/0x11e8 fs/btrfs/extent-tree.c:5173
 btrfs_force_cow_block+0x4c0/0x1a58 fs/btrfs/ctree.c:571
 btrfs_cow_block+0x318/0xa3c fs/btrfs/ctree.c:749
 btrfs_search_slot+0xba0/0x2a00
 btrfs_lookup_csum+0x164/0x500 fs/btrfs/file-item.c:218
 btrfs_csum_file_blocks+0x29c/0x1548 fs/btrfs/file-item.c:1067
 add_pending_csums fs/btrfs/inode.c:2633 [inline]
 btrfs_finish_one_ordered+0x8ac/0x13ec fs/btrfs/inode.c:3162
 btrfs_finish_ordered_io+0x124/0x138 fs/btrfs/inode.c:3286
 finish_ordered_fn+0x20/0xa8 fs/btrfs/ordered-data.c:302
 btrfs_work_helper+0x37c/0xda4 fs/btrfs/async-thread.c:314
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3254
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3416
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860