BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 109 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_unbound btrfs_async_reclaim_data_space
Call trace:
 dump_backtrace+0x1c0/0x1ec 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+0xf4/0x15c 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+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb0 kernel/locking/spinlock.c:162
 debug_object_activate+0x80/0x4b8 lib/debugobjects.c:698
 debug_work_activate kernel/workqueue.c:510 [inline]
 __queue_work+0xca8/0x1234 kernel/workqueue.c:1519
 queue_work_on+0xc0/0x164 kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:512 [inline]
 loop_queue_work drivers/block/loop.c:893 [inline]
 loop_queue_rq+0x94c/0xa7c drivers/block/loop.c:1874
 __blk_mq_issue_directly block/blk-mq.c:2643 [inline]
 __blk_mq_try_issue_directly+0x408/0x67c block/blk-mq.c:2696
 blk_mq_request_issue_directly block/blk-mq.c:2730 [inline]
 blk_mq_plug_issue_direct+0x1fc/0x574 block/blk-mq.c:2750
 blk_mq_flush_plug_list+0x5e8/0xa6c block/blk-mq.c:2850
 __blk_flush_plug+0x340/0x3c0 block/blk-core.c:1179
 blk_finish_plug+0x68/0x90 block/blk-core.c:1203
 btrfs_write_and_wait_transaction+0xf8/0x204 fs/btrfs/transaction.c:1214
 btrfs_commit_transaction+0x1864/0x2884 fs/btrfs/transaction.c:2506
 flush_space+0x7d8/0xc94 fs/btrfs/space-info.c:855
 btrfs_async_reclaim_data_space+0x244/0x478 fs/btrfs/space-info.c:1360
 process_one_work+0x7f8/0x13a4 kernel/workqueue.c:2292
 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850