BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 5450 Comm: kworker/u4:8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
Workqueue: xfs_iwalk-7910 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
 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
 ktime_get+0xe4/0x1d8 kernel/time/timekeeping.c:846
 ktime_get_ns include/linux/timekeeping.h:154 [inline]
 bio_issue_init include/linux/blk_types.h:239 [inline]
 blkcg_bio_issue_init block/blk-cgroup.h:381 [inline]
 submit_bio_noacct_nocheck+0xd8/0xa14 block/blk-core.c:677
 submit_bio_noacct+0xcc0/0x16bc block/blk-core.c:808
 submit_bio+0x29c/0x3d0 block/blk-core.c:853
 xfs_buf_ioapply_map+0x494/0x600 fs/xfs/xfs_buf.c:1510
 _xfs_buf_ioapply+0x174/0x518 fs/xfs/xfs_buf.c:1592
 __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_bmap_longest_free_extent+0x124/0x200 fs/xfs/libxfs/xfs_bmap.c:3197
 xfs_bmap_btalloc_nullfb+0x1c4/0x4e0 fs/xfs/libxfs/xfs_bmap.c:3267
 xfs_bmap_btalloc+0x9c4/0x1854 fs/xfs/libxfs/xfs_bmap.c:3591
 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+0x3e8/0x560 fs/xfs/xfs_qm.c:1211
 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