debugfs: Directory 'hsr0' with parent 'hsr' already present!
Cannot create hsr debugfs directory
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 6488 Comm: syz-executor Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 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:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162
 try_to_wake_up+0x60/0xa64 kernel/sched/core.c:4030
 wake_up_process+0x18/0x24 kernel/sched/core.c:4215
 swake_up_locked kernel/sched/swait.c:30 [inline]
 swake_up_one+0x70/0x134 kernel/sched/swait.c:53
 rcu_gp_kthread_wake kernel/rcu/tree.c:1481 [inline]
 rcu_report_qs_rsp+0x234/0x36c kernel/rcu/tree.c:2171
 rcu_report_unblock_qs_rnp kernel/rcu/tree.c:2275 [inline]
 rcu_preempt_deferred_qs_irqrestore+0x9ac/0xd60 kernel/rcu/tree_plugin.h:552
 rcu_read_unlock_special+0xac/0x428 kernel/rcu/tree_plugin.h:670
 __rcu_read_unlock+0xa4/0x108 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 sock_def_readable+0x230/0x278 net/core/sock.c:3096
 __netlink_sendskb net/netlink/af_netlink.c:1264 [inline]
 netlink_broadcast_deliver net/netlink/af_netlink.c:1401 [inline]
 do_one_broadcast net/netlink/af_netlink.c:1488 [inline]
 netlink_broadcast_filtered+0x980/0xe6c net/netlink/af_netlink.c:1532
 netlink_broadcast+0x50/0x68 net/netlink/af_netlink.c:1556
 uevent_net_broadcast_tagged lib/kobject_uevent.c:372 [inline]
 kobject_uevent_net_broadcast+0x4a4/0x53c lib/kobject_uevent.c:412
 kobject_uevent_env+0x548/0x888 lib/kobject_uevent.c:608
 kobject_uevent+0x2c/0x3c lib/kobject_uevent.c:657
 device_del+0x7d8/0x964 drivers/base/core.c:3610
 netdev_unregister_kobject+0x13c/0x204 net/core/net-sysfs.c:1980
 unregister_netdevice_many+0x121c/0x17d0 net/core/dev.c:11161
 unregister_netdevice_queue+0x2ac/0x2f8 net/core/dev.c:11067
 unregister_netdevice include/linux/netdevice.h:3020 [inline]
 lapbeth_free_device drivers/net/wan/lapbether.c:437 [inline]
 lapbeth_device_event+0x5ac/0x964 drivers/net/wan/lapbether.c:472
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2049 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2061 [inline]
 call_netdevice_notifiers net/core/dev.c:2075 [inline]
 unregister_netdevice_many+0xe10/0x17d0 net/core/dev.c:11134
 unregister_netdevice_queue+0x2ac/0x2f8 net/core/dev.c:11067
 unregister_netdevice include/linux/netdevice.h:3020 [inline]
 nsim_destroy+0x58/0x164 drivers/net/netdevsim/netdev.c:382
 __nsim_dev_port_del+0x144/0x1a4 drivers/net/netdevsim/dev.c:1349
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1362 [inline]
 nsim_dev_reload_destroy+0x144/0x204 drivers/net/netdevsim/dev.c:1561
 nsim_dev_remove+0x5c/0x108 drivers/net/netdevsim/dev.c:1577
 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:381
 __device_release_driver drivers/base/dd.c:1227 [inline]
 device_release_driver_internal+0x3c0/0x63c drivers/base/dd.c:1262
 device_release_driver+0x28/0x38 drivers/base/dd.c:1285
 bus_remove_device+0x294/0x388 drivers/base/bus.c:531
 device_del+0x568/0x964 drivers/base/core.c:3600
 device_unregister+0x2c/0xcc drivers/base/core.c:3633
 nsim_bus_dev_del drivers/net/netdevsim/bus.c:454 [inline]
 del_device_store+0x25c/0x33c drivers/net/netdevsim/bus.c:354
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:124
 sysfs_kf_write+0x1f8/0x278 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x320/0x478 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x7c8/0xa2c fs/read_write.c:594
 ksys_write+0x120/0x210 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:656
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584