BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 1567 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: xfs_iwalk-12809 xfs_pwork_work 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 xfs_buf_submit_bio fs/xfs/xfs_buf.c:1365 [inline] xfs_buf_submit+0x680/0xa5c fs/xfs/xfs_buf.c:1471 _xfs_buf_read fs/xfs/xfs_buf.c:642 [inline] xfs_buf_read_map+0x2fc/0x9e8 fs/xfs/xfs_buf.c:709 xfs_trans_read_buf_map+0x1bc/0x990 fs/xfs/xfs_trans_buf.c:304 xfs_trans_read_buf fs/xfs/xfs_trans.h:210 [inline] xfs_read_agf+0x220/0x58c fs/xfs/libxfs/xfs_alloc.c:3376 xfs_alloc_read_agf+0x14c/0xb78 fs/xfs/libxfs/xfs_alloc.c:3411 xfs_alloc_fix_freelist+0x45c/0x1008 fs/xfs/libxfs/xfs_alloc.c:2875 xfs_alloc_vextent_prepare_ag+0xd4/0x6a4 fs/xfs/libxfs/xfs_alloc.c:3566 xfs_alloc_vextent_iterate_ags+0x130/0x9bc fs/xfs/libxfs/xfs_alloc.c:3750 xfs_alloc_vextent_start_ag+0x2d4/0x78c fs/xfs/libxfs/xfs_alloc.c:3839 xfs_bmap_btalloc_best_length fs/xfs/libxfs/xfs_bmap.c:3619 [inline] xfs_bmap_btalloc fs/xfs/libxfs/xfs_bmap.c:3663 [inline] xfs_bmapi_allocate+0x12c0/0x2500 fs/xfs/libxfs/xfs_bmap.c:3938 xfs_bmapi_write+0x698/0xfb8 fs/xfs/libxfs/xfs_bmap.c:4267 xfs_dquot_disk_alloc+0x404/0x964 fs/xfs/xfs_dquot.c:381 xfs_qm_dqread+0x138/0x5f4 fs/xfs/xfs_dquot.c:720 xfs_qm_dqget+0x13c/0x404 fs/xfs/xfs_dquot.c:922 xfs_qm_quotacheck_dqadjust+0xc4/0x594 fs/xfs/xfs_qm.c:1261 xfs_qm_dqusage_adjust+0x428/0x5b0 fs/xfs/xfs_qm.c:1390 xfs_iwalk_ag_recs+0x404/0x7c8 fs/xfs/xfs_iwalk.c:209 xfs_iwalk_run_callbacks+0x1c0/0x3e8 fs/xfs/xfs_iwalk.c:370 xfs_iwalk_ag+0x6ac/0x82c fs/xfs/xfs_iwalk.c:473 xfs_iwalk_ag_work+0xf8/0x1a0 fs/xfs/xfs_iwalk.c:620 xfs_pwork_work+0x80/0x1a4 fs/xfs/xfs_pwork.c:47 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