BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 PID: 7299 Comm: kworker/u4:24 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: btrfs-endio-write btrfs_work_helper Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline] validate_chain kernel/locking/lockdep.c:3793 [inline] __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] btrfs_block_rsv_reserved fs/btrfs/block-rsv.h:125 [inline] need_preemptive_reclaim+0x40/0x5d0 fs/btrfs/space-info.c:850 __reserve_bytes+0xc8c/0x110c fs/btrfs/space-info.c:1693 btrfs_reserve_metadata_bytes+0x64/0x148 fs/btrfs/space-info.c:1730 btrfs_use_block_rsv+0x414/0x694 fs/btrfs/block-rsv.c:548 btrfs_alloc_tree_block+0x150/0x1158 fs/btrfs/extent-tree.c:5028 btrfs_force_cow_block+0x3a0/0x187c fs/btrfs/ctree.c:450 btrfs_cow_block+0x2d0/0x710 fs/btrfs/ctree.c:623 btrfs_search_slot+0xa54/0x2364 fs/btrfs/ctree.c:2087 btrfs_mark_extent_written+0x17c/0x1bb8 fs/btrfs/file.c:620 btrfs_finish_ordered_io+0x7dc/0x162c fs/btrfs/inode.c:3298 finish_ordered_fn+0x20/0x30 fs/btrfs/ordered-data.c:287 btrfs_work_helper+0x30c/0xccc fs/btrfs/async-thread.c:280 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850