debugfs: Directory 'hsr0' with parent 'hsr' already present! Cannot create hsr debugfs directory netdevsim netdevsim6 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 8232 Comm: syz-executor Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (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:3858 [inline] validate_chain kernel/locking/lockdep.c:3879 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 debug_object_activate+0x7c/0x460 lib/debugobjects.c:818 debug_hrtimer_activate kernel/time/hrtimer.c:445 [inline] debug_activate kernel/time/hrtimer.c:484 [inline] enqueue_hrtimer+0x40/0x42c kernel/time/hrtimer.c:1088 __hrtimer_start_range_ns kernel/time/hrtimer.c:1270 [inline] hrtimer_start_range_ns+0x884/0xc98 kernel/time/hrtimer.c:1329 hrtimer_start include/linux/hrtimer.h:263 [inline] task_non_contending+0x7bc/0xbe4 kernel/sched/deadline.c:495 dequeue_dl_entity+0x524/0x7f0 kernel/sched/deadline.c:2113 dl_server_stop+0x4c/0xa4 kernel/sched/deadline.c:1680 dequeue_entities+0xcb8/0xf64 kernel/sched/fair.c:7158 dequeue_task_fair+0x1d0/0x3ec kernel/sched/fair.c:7193 dequeue_task+0x1f8/0x2bc kernel/sched/core.c:2116 block_task kernel/sched/core.c:2149 [inline] try_to_block_task kernel/sched/core.c:6618 [inline] __schedule+0x4f8/0x2a28 kernel/sched/core.c:6734 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6878 synchronize_rcu_expedited+0x4a8/0x628 kernel/rcu/tree_exp.h:1013 synchronize_net net/core/dev.c:11927 [inline] unregister_netdevice_many_notify+0x1c40/0x1fac net/core/dev.c:12119 unregister_netdevice_many net/core/dev.c:12140 [inline] unregister_netdevice_queue+0x2b4/0x300 net/core/dev.c:11984 unregister_netdevice include/linux/netdevice.h:3379 [inline] nsim_destroy+0x1c0/0x59c drivers/net/netdevsim/netdev.c:1069 __nsim_dev_port_del+0x13c/0x19c drivers/net/netdevsim/dev.c:1428 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline] nsim_dev_reload_destroy+0x240/0x43c drivers/net/netdevsim/dev.c:1661 nsim_drv_remove+0x5c/0x154 drivers/net/netdevsim/dev.c:1676 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:398 device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x3a8/0x658 drivers/base/dd.c:1295 device_release_driver+0x28/0x38 drivers/base/dd.c:1318 bus_remove_device+0x310/0x3b0 drivers/base/bus.c:579 device_del+0x47c/0x808 drivers/base/core.c:3881 device_unregister+0x2c/0xcc drivers/base/core.c:3922 nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline] del_device_store+0x27c/0x31c drivers/net/netdevsim/bus.c:226 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145 kernfs_fop_write_iter+0x314/0x488 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x62c/0x97c fs/read_write.c:686 ksys_write+0x120/0x210 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+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 netdevsim netdevsim6 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim6 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim6 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim6 netdevsim0: renamed from eth0 netdevsim netdevsim6 netdevsim1: renamed from eth1 netdevsim netdevsim6 netdevsim2: renamed from eth2 netdevsim netdevsim6 netdevsim3: renamed from eth3 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device batadv0 veth0_vlan: entered promiscuous mode veth1_vlan: entered promiscuous mode veth0_macvtap: entered promiscuous mode veth1_macvtap: entered promiscuous mode batman_adv: batadv0: Interface activated: batadv_slave_0 batman_adv: batadv0: Interface activated: batadv_slave_1 netdevsim netdevsim6 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim6 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim6 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim6 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 ieee80211 phy117: Selected rate control algorithm 'minstrel_ht' ieee80211 phy118: Selected rate control algorithm 'minstrel_ht'