syzbot

BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 416 Comm: kworker/u8:6 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_nested+0x50/0x6c kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:639 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
 rq_lock kernel/sched/sched.h:1885 [inline]
 __schedule+0x370/0x2a7c kernel/sched/core.c:6768
 preempt_schedule_common+0xe0/0x194 kernel/sched/core.c:7047
 preempt_schedule+0x60/0x80 kernel/sched/core.c:7071
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irq+0x7c/0x80 kernel/locking/spinlock.c:202
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 loop_queue_work drivers/block/loop.c:864 [inline]
 loop_queue_rq+0x94c/0xaa8 drivers/block/loop.c:1890
 __blk_mq_issue_directly block/blk-mq.c:2715 [inline]
 blk_mq_request_issue_directly+0x2c0/0x560 block/blk-mq.c:2802
 blk_mq_issue_direct+0x254/0x558 block/blk-mq.c:2823
 blk_mq_dispatch_queue_requests+0x568/0x674 block/blk-mq.c:2898
 blk_mq_flush_plug_list+0x370/0x488 block/blk-mq.c:2981
 __blk_flush_plug+0x330/0x408 block/blk-core.c:1225
 blk_finish_plug+0x68/0x90 block/blk-core.c:1252
 btrfs_write_and_wait_transaction+0xe8/0x1e8 fs/btrfs/transaction.c:1273
 btrfs_commit_transaction+0x1a14/0x2d30 fs/btrfs/transaction.c:2551
 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 loop3): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop2): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop0): qgroup scan completed (inconsistency flag cleared)
BTRFS info (device loop2): qgroup scan completed (inconsistency flag cleared)