netdevsim netdevsim6 netdevsim2 (unregistering): unset [1, 0] type 2 fam
netdevsim netdevsim6 netdevsim2 (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: 11806 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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+0xfdc/0x2ebc kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868
 do_write_seqcount_begin_nested include/linux/seqlock.h:478 [inline]
 do_write_seqcount_begin include/linux/seqlock.h:504 [inline]
 psi_write_begin+0x1b4/0x320 kernel/sched/psi.c:183
 psi_account_irqtime+0x1c8/0x420 kernel/sched/psi.c:1030
 __schedule+0x1328/0x2db8 kernel/sched/core.c:7182
 preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7370
 preempt_schedule+0x60/0x78 kernel/sched/core.c:7394
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
 _raw_spin_unlock_irqrestore+0x94/0x98 kernel/locking/spinlock.c:198
 debug_object_activate+0x1a4/0x23c lib/debugobjects.c:863
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3116 [inline]
 call_rcu+0x54/0x75c kernel/rcu/tree.c:3251
 kernfs_put+0x234/0x540 fs/kernfs/dir.c:618
 kernfs_remove_by_name_ns+0x78/0xd0 fs/kernfs/dir.c:1799
 kernfs_remove_by_name include/linux/kernfs.h:639 [inline]
 remove_files+0x90/0x184 fs/sysfs/group.c:28
 sysfs_remove_group+0x98/0x160 fs/sysfs/group.c:328
 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:352
 device_remove_groups drivers/base/core.c:2844 [inline]
 device_remove_attrs+0x188/0x238 drivers/base/core.c:2974
 device_del+0x3e4/0x71c drivers/base/core.c:3894
 netdev_unregister_kobject+0x2a8/0x39c net/core/net-sysfs.c:2314
 unregister_netdevice_many_notify+0x13d8/0x18f4 net/core/dev.c:12456
 unregister_netdevice_many net/core/dev.c:12484 [inline]
 unregister_netdevice_queue+0x274/0x30c net/core/dev.c:12294
 unregister_netdevice include/linux/netdevice.h:3444 [inline]
 nsim_destroy+0x240/0x5f0 drivers/net/netdevsim/netdev.c:1193
 __nsim_dev_port_del+0x13c/0x1ec drivers/net/netdevsim/dev.c:1547
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline]
 nsim_dev_reload_destroy+0x13c/0x210 drivers/net/netdevsim/dev.c:1785
 nsim_drv_remove+0x5c/0x114 drivers/net/netdevsim/dev.c:1800
 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:427
 device_remove+0xc4/0x134 drivers/base/dd.c:619
 __device_release_driver drivers/base/dd.c:1352 [inline]
 device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1375
 device_release_driver+0x28/0x38 drivers/base/dd.c:1398
 bus_remove_device+0x2d0/0x400 drivers/base/bus.c:657
 device_del+0x3ec/0x71c drivers/base/core.c:3895
 device_unregister+0x2c/0xf0 drivers/base/core.c:3936
 nsim_bus_dev_del+0x60/0x8c drivers/net/netdevsim/bus.c:491
 del_device_store+0x24c/0x2d4 drivers/net/netdevsim/bus.c:244
 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:688
 ksys_write+0x12c/0x228 fs/read_write.c:740
 __do_sys_write fs/read_write.c:751 [inline]
 __se_sys_write fs/read_write.c:748 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:748
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
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