BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 6551 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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+0x14c/0x2e0 kernel/locking/lockdep.c:5868 do_write_seqcount_begin_nested include/linux/seqlock.h:477 [inline] do_write_seqcount_begin include/linux/seqlock.h:503 [inline] psi_write_begin+0x1b0/0x320 kernel/sched/psi.c:183 psi_task_change+0xd8/0x318 kernel/sched/psi.c:919 psi_dequeue kernel/sched/stats.h:191 [inline] dequeue_task+0x2a0/0x2bc kernel/sched/core.c:2115 deactivate_task+0x38/0x84 kernel/sched/core.c:2150 detach_task+0x150/0x2e8 kernel/sched/fair.c:9403 detach_tasks kernel/sched/fair.c:9539 [inline] sched_balance_rq+0x3a30/0x52f4 kernel/sched/fair.c:11714 sched_balance_newidle+0x520/0xce0 kernel/sched/fair.c:12762 pick_next_task_fair+0x48/0x804 kernel/sched/fair.c:8835 __pick_next_task kernel/sched/core.c:6001 [inline] pick_next_task kernel/sched/core.c:6520 [inline] __schedule+0x660/0x2864 kernel/sched/core.c:6902 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 synchronize_rcu_expedited+0x4a8/0x628 kernel/rcu/tree_exp.h:972 kern_unmount_array+0xb4/0x1a4 fs/namespace.c:6205 ovl_free_fs+0x2ec/0x584 fs/overlayfs/params.c:830 ovl_put_super+0x80/0xa8 fs/overlayfs/super.c:212 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_anon_super+0x4c/0x7c fs/super.c:1282 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xfc/0x168 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline] el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 XFS (loop3): Unmounting Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791