BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6226 Comm: kworker/u4:13 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: xfs_iwalk-7405 xfs_pwork_work
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
 _xfs_buf_ioapply+0x344/0x518 fs/xfs/xfs_buf.c:1598
 __xfs_buf_submit+0x2f0/0x7f0 fs/xfs/xfs_buf.c:1676
 xfs_buf_submit fs/xfs/xfs_buf.c:60 [inline]
 _xfs_buf_read fs/xfs/xfs_buf.c:757 [inline]
 xfs_buf_read_map+0x3b8/0x9f8 fs/xfs/xfs_buf.c:821
 xfs_trans_read_buf_map+0x204/0xaec fs/xfs/xfs_trans_buf.c:289
 xfs_trans_read_buf fs/xfs/xfs_trans.h:212 [inline]
 xfs_read_agf+0x250/0x5fc fs/xfs/libxfs/xfs_alloc.c:3102
 xfs_alloc_read_agf+0x188/0xc68 fs/xfs/libxfs/xfs_alloc.c:3134
 xfs_alloc_fix_freelist+0x498/0xffc fs/xfs/libxfs/xfs_alloc.c:2676
 xfs_alloc_vextent+0xb0c/0x1c00 fs/xfs/libxfs/xfs_alloc.c:3309
 xfs_bmap_btalloc+0xad4/0x1854 fs/xfs/libxfs/xfs_bmap.c:3662
 xfs_bmapi_allocate+0x568/0xbd0 fs/xfs/libxfs/xfs_bmap.c:-1
 xfs_bmapi_write+0x698/0xf1c fs/xfs/libxfs/xfs_bmap.c:4462
 xfs_dquot_disk_alloc+0x3f8/0xa24 fs/xfs/xfs_dquot.c:329
 xfs_qm_dqread+0x158/0x6dc fs/xfs/xfs_dquot.c:665
 xfs_qm_dqget+0x180/0x510 fs/xfs/xfs_dquot.c:869
 xfs_qm_quotacheck_dqadjust+0xc8/0x658 fs/xfs/xfs_qm.c:1085
 xfs_qm_dqusage_adjust+0x390/0x560 fs/xfs/xfs_qm.c:1204
 xfs_iwalk_ag_recs+0x42c/0x848 fs/xfs/xfs_iwalk.c:220
 xfs_iwalk_run_callbacks+0x1bc/0x3b0 fs/xfs/xfs_iwalk.c:376
 xfs_iwalk_ag+0x6a8/0x820 fs/xfs/xfs_iwalk.c:482
 xfs_iwalk_ag_work+0xfc/0x1a8 fs/xfs/xfs_iwalk.c:624
 xfs_pwork_work+0x80/0x1a0 fs/xfs/xfs_pwork.c:47
 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