BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 360 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: btrfs-endio-write btrfs_work_helper Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline] debug_check_no_obj_freed+0x148/0x470 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2454 [inline] slab_free mm/slub.c:6611 [inline] kmem_cache_free+0x128/0x6dc mm/slub.c:6721 btrfs_put_delayed_ref fs/btrfs/delayed-ref.c:1163 [inline] drop_delayed_ref+0x264/0x3b8 fs/btrfs/delayed-ref.c:380 insert_delayed_ref fs/btrfs/delayed-ref.c:625 [inline] add_delayed_ref+0x12f8/0x1990 fs/btrfs/delayed-ref.c:1056 btrfs_add_delayed_data_ref+0x94/0x148 fs/btrfs/delayed-ref.c:1105 btrfs_free_extent+0x248/0x284 fs/btrfs/extent-tree.c:3545 btrfs_drop_extents+0x1094/0x245c fs/btrfs/file.c:428 insert_reserved_file_extent+0x254/0x7a4 fs/btrfs/inode.c:2965 insert_ordered_extent_file_extent fs/btrfs/inode.c:3067 [inline] btrfs_finish_one_ordered+0xb7c/0x1b48 fs/btrfs/inode.c:3188 btrfs_finish_ordered_io+0x120/0x134 fs/btrfs/inode.c:3330 finish_ordered_fn+0x20/0x30 fs/btrfs/ordered-data.c:347 btrfs_work_helper+0x380/0xca8 fs/btrfs/async-thread.c:312 process_one_work+0x7e8/0x155c kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50