BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 26975 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xa4/0xf4 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 add_chain_cache kernel/locking/lockdep.c:3773 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x1d4c/0x2380 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x310/0x38c kernel/locking/lockdep.c:5825 do_write_seqcount_begin_nested include/linux/seqlock.h:477 [inline] do_write_seqcount_begin include/linux/seqlock.h:503 [inline] psi_write_begin+0xc4/0x3b0 kernel/sched/psi.c:183 psi_task_change+0xb4/0x394 kernel/sched/psi.c:919 psi_enqueue kernel/sched/stats.h:166 [inline] enqueue_task+0x188/0x35c kernel/sched/core.c:2094 activate_task kernel/sched/core.c:2134 [inline] ttwu_do_activate+0x114/0x760 kernel/sched/core.c:3706 ttwu_queue kernel/sched/core.c:3969 [inline] try_to_wake_up+0x8e4/0x122c kernel/sched/core.c:4293 wake_up_process+0x18/0x24 kernel/sched/core.c:4424 kthread_insert_work kernel/kthread.c:1169 [inline] kthread_insert_work+0x2f0/0x3a8 kernel/kthread.c:1158 kthread_queue_work+0xf0/0x12c kernel/kthread.c:1192 synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:498 [inline] synchronize_rcu_expedited+0x2d8/0x3d8 kernel/rcu/tree_exp.h:967 synchronize_net+0x5c/0x88 net/core/dev.c:12117 dev_deactivate_many+0x6f0/0x800 net/sched/sch_generic.c:1378 __dev_close_many+0x130/0x5a4 net/core/dev.c:1739 netif_close_many+0x1a0/0x43c net/core/dev.c:1780 netif_close_many_and_unlock+0x24/0x1bc net/core/dev.c:12184 unregister_netdevice_many_notify+0x3bc/0x1b18 net/core/dev.c:12248 unregister_netdevice_many net/core/dev.c:12347 [inline] unregister_netdevice_queue+0x25c/0x324 net/core/dev.c:12161 unregister_netdevice include/linux/netdevice.h:3389 [inline] nsim_destroy+0x12c/0x5d4 drivers/net/netdevsim/netdev.c:1178 __nsim_dev_port_del+0x128/0x1d8 drivers/net/netdevsim/dev.c:1473 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline] nsim_dev_reload_destroy+0xd0/0x3a0 drivers/net/netdevsim/dev.c:1707 nsim_drv_remove+0x50/0x19c drivers/net/netdevsim/dev.c:1722 nsim_bus_remove+0x10/0x1c drivers/net/netdevsim/bus.c:419 device_remove+0xb0/0x14c drivers/base/dd.c:569 __device_release_driver drivers/base/dd.c:1274 [inline] device_release_driver_internal+0x310/0x47c drivers/base/dd.c:1297 device_release_driver+0x18/0x24 drivers/base/dd.c:1320 bus_remove_device+0x1a4/0x348 drivers/base/bus.c:579 device_del+0x2d0/0x7b4 drivers/base/core.c:3878 device_unregister+0x20/0xbc drivers/base/core.c:3919 nsim_bus_dev_del drivers/net/netdevsim/bus.c:483 [inline] del_device_store+0x28c/0x3b8 drivers/net/netdevsim/bus.c:244 bus_attr_store+0x60/0x9c drivers/base/bus.c:172 sysfs_kf_write+0xc4/0x10c fs/sysfs/file.c:142 kernfs_fop_write_iter+0x288/0x420 fs/kernfs/file.c:352 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x4b0/0xb88 fs/read_write.c:686 ksys_write+0xec/0x1d8 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x6c/0x9c fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x288 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596