syzbot

BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 1563 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: btrfs-qgroup-rescan 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+0x140/0x2e0 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:2471 [inline]
 slab_free mm/slub.c:6670 [inline]
 kmem_cache_free+0x120/0x6e4 mm/slub.c:6781
 btrfs_free_extent_state+0x16c/0x38c fs/btrfs/extent-io-tree.c:182
 merge_prev_state fs/btrfs/extent-io-tree.c:353 [inline]
 merge_state+0x1e0/0x420 fs/btrfs/extent-io-tree.c:386
 insert_state_fast+0x1f4/0x25c fs/btrfs/extent-io-tree.c:486
 set_extent_bit+0x157c/0x1cd0 fs/btrfs/extent-io-tree.c:1103
 btrfs_set_extent_bit+0x54/0x6c fs/btrfs/extent-io-tree.c:1297
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:5113 [inline]
 btrfs_alloc_tree_block+0x754/0xe38 fs/btrfs/extent-tree.c:5162
 btrfs_force_cow_block+0x404/0x2058 fs/btrfs/ctree.c:517
 btrfs_cow_block+0x328/0x940 fs/btrfs/ctree.c:708
 btrfs_search_slot+0x96c/0x2228 fs/btrfs/ctree.c:2130
 update_qgroup_info_item fs/btrfs/qgroup.c:866 [inline]
 btrfs_run_qgroups+0x2f8/0x650 fs/btrfs/qgroup.c:3076
 commit_cowonly_roots+0x1b4/0x700 fs/btrfs/transaction.c:1363
 btrfs_commit_transaction+0x10e8/0x2d30 fs/btrfs/transaction.c:2477
 btrfs_qgroup_rescan_worker+0x12b8/0x19e8 fs/btrfs/qgroup.c:3796
 btrfs_work_helper+0x360/0xca8 fs/btrfs/async-thread.c:312
 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3421
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
BTRFS info (device loop4): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop1): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop2): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop4): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop1): qgroup scan completed (inconsistency flag cleared)