BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 9323 Comm: syz.6.387 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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_enqueue kernel/sched/stats.h:166 [inline] enqueue_task+0x250/0x2f4 kernel/sched/core.c:2094 activate_task kernel/sched/core.c:2134 [inline] ttwu_do_activate+0x1a4/0x764 kernel/sched/core.c:3706 ttwu_queue kernel/sched/core.c:3969 [inline] try_to_wake_up+0x4c4/0xe24 kernel/sched/core.c:4293 wake_up_process+0x18/0x24 kernel/sched/core.c:4424 kick_pool+0x3e0/0x58c kernel/workqueue.c:1285 __queue_work+0xdbc/0x1210 kernel/workqueue.c:2342 queue_work_on+0xdc/0x18c kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:669 [inline] tty_buffer_restart_work+0x54/0x68 drivers/tty/tty_buffer.c:616 n_tty_kick_worker+0x198/0x1f4 drivers/tty/n_tty.c:209 n_tty_flush_buffer+0xdc/0x208 drivers/tty/n_tty.c:354 tty_ldisc_hangup+0xb4/0x494 drivers/tty/tty_ldisc.c:699 __tty_hangup+0x3a4/0x67c drivers/tty/tty_io.c:621 tty_vhangup+0x24/0x34 drivers/tty/tty_io.c:691 pty_close+0x2ac/0x438 drivers/tty/pty.c:79 tty_release+0x2d0/0x1208 drivers/tty/tty_io.c:1745 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:227 get_signal+0x112c/0x12f8 kernel/signal.c:2807 arch_do_signal_or_restart+0x274/0x4414 arch/arm64/kernel/signal.c:1619 exit_to_user_mode_loop+0x7c/0x178 kernel/entry/common.c:40 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:747 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596