BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6513 Comm: kworker/u4:202 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Workqueue: events_unbound flush_to_ldisc
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
 remove_entity_load_avg kernel/sched/fair.c:4246 [inline]
 migrate_task_rq_fair+0x118/0x784 kernel/sched/fair.c:7546
 set_task_cpu+0x134/0x660 kernel/sched/core.c:3158
 try_to_wake_up+0x384/0xc68 kernel/sched/core.c:4222
 wake_up_process+0x18/0x24 kernel/sched/core.c:4362
 wake_up_worker kernel/workqueue.c:859 [inline]
 insert_work+0x2a4/0x37c kernel/workqueue.c:1369
 __queue_work+0xcbc/0x1234 kernel/workqueue.c:1520
 queue_work_on+0xc0/0x164 kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:512 [inline]
 tty_insert_flip_string_and_push_buffer+0x2bc/0x308 drivers/tty/tty_buffer.c:634
 pty_write+0xac/0xe4 drivers/tty/pty.c:118
 tty_put_char+0x100/0x148 drivers/tty/tty_io.c:3141
 do_output_char+0x518/0x7c8 drivers/tty/n_tty.c:481
 __process_echoes+0x228/0xcbc drivers/tty/n_tty.c:727
 commit_echoes drivers/tty/n_tty.c:782 [inline]
 n_tty_receive_char+0x710/0xa14 drivers/tty/n_tty.c:1420
 n_tty_receive_buf_standard+0x430/0x4718 drivers/tty/n_tty.c:-1
 __receive_buf drivers/tty/n_tty.c:1623 [inline]
 n_tty_receive_buf_common+0x8dc/0x1060 drivers/tty/n_tty.c:1721
 n_tty_receive_buf2+0x40/0x54 drivers/tty/n_tty.c:1767
 tty_ldisc_receive_buf+0xa4/0x160 drivers/tty/tty_buffer.c:457
 tty_port_default_receive_buf+0x74/0xac drivers/tty/tty_port.c:39
 receive_buf drivers/tty/tty_buffer.c:515 [inline]
 flush_to_ldisc+0x25c/0x708 drivers/tty/tty_buffer.c:565
 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
F2FS-fs (loop5): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix.
F2FS-fs (loop5): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.