[ 30.400426][ C1] BUG: spinlock bad magic on CPU#1, kworker/u16:1/75 [ 30.400638][ C1] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:1/75, .owner_cpu: 1 [ 30.400920][ C1] CPU: 1 UID: 0 PID: 75 Comm: kworker/u16:1 Not tainted 6.10.0-virtme #1 [ 30.401121][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 30.401425][ C1] Workqueue: netns cleanup_net [ 30.401572][ C1] Call Trace: [ 30.401679][ C1] [ 30.401753][ C1] dump_stack_lvl+0xb0/0xd0 [ 30.401899][ C1] do_raw_spin_unlock+0x1ac/0x220 [ 30.402039][ C1] _raw_spin_unlock+0x23/0x40 [ 30.402178][ C1] net_tx_action+0x424/0x680 [ 30.402323][ C1] handle_softirqs+0x1f9/0x5c0 [ 30.402457][ C1] ? dev_deactivate_many+0x1e2/0x8d0 [ 30.402596][ C1] do_softirq+0x4d/0xa0 [ 30.402698][ C1] [ 30.402764][ C1] [ 30.402829][ C1] __local_bh_enable_ip+0xf6/0x120 [ 30.402957][ C1] dev_deactivate_many+0x1e7/0x8d0 [ 30.403093][ C1] __dev_close_many+0x12b/0x2d0 [ 30.403227][ C1] ? __pfx___dev_close_many+0x10/0x10 [ 30.403363][ C1] ? __lock_acquire+0xa70/0x1560 [ 30.403499][ C1] dev_close_many+0x202/0x650 [ 30.403634][ C1] ? lock_acquire.part.0+0xeb/0x330 [ 30.403767][ C1] ? default_device_exit_batch+0x81/0x2d0 [ 30.403905][ C1] ? __pfx_dev_close_many+0x10/0x10 [ 30.404034][ C1] ? fou_exit_net+0x2f/0xf0 [ 30.404167][ C1] ? __mutex_trylock_common+0xfa/0x260 [ 30.404301][ C1] unregister_netdevice_many_notify+0x8e5/0x1570 [ 30.404465][ C1] ? lock_acquire+0x32/0xc0 [ 30.404597][ C1] ? trace_contention_end+0xeb/0x150 [ 30.404738][ C1] ? __mutex_lock+0x170/0xac0 [ 30.404875][ C1] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 30.405037][ C1] ? __mutex_lock+0x170/0xac0 [ 30.405174][ C1] ? find_held_lock+0x2c/0x110 [ 30.405306][ C1] ? mutex_is_locked+0x17/0x50 [ 30.405444][ C1] ? rtnl_is_locked+0x15/0x20 [ 30.405578][ C1] ? unregister_netdevice_queue+0x70/0x410 [ 30.405736][ C1] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 30.405899][ C1] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 30.406069][ C1] default_device_exit_batch+0x234/0x2d0 [ 30.406232][ C1] ? __pfx_default_device_exit_batch+0x10/0x10 [ 30.406393][ C1] ? ops_exit_list+0xb4/0x170 [ 30.406546][ C1] cleanup_net+0x4ef/0xb10 [ 30.406683][ C1] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.406819][ C1] ? __pfx_cleanup_net+0x10/0x10 [ 30.406953][ C1] ? trace_lock_acquire+0x14d/0x1f0 [ 30.407090][ C1] ? process_one_work+0xdf1/0x1670 [ 30.407225][ C1] ? lock_acquire+0x32/0xc0 [ 30.407360][ C1] ? process_one_work+0xdf1/0x1670 [ 30.407497][ C1] process_one_work+0xe3b/0x1670 [ 30.407633][ C1] ? __pfx___lock_release+0x10/0x10 [ 30.407765][ C1] ? __pfx_process_one_work+0x10/0x10 [ 30.407901][ C1] ? assign_work+0x16c/0x240 [ 30.408038][ C1] worker_thread+0x587/0xce0 [ 30.408181][ C1] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 30.408353][ C1] ? __pfx_worker_thread+0x10/0x10 [ 30.408489][ C1] ? __pfx_worker_thread+0x10/0x10 [ 30.408704][ C1] kthread+0x28a/0x350 [ 30.408805][ C1] ? __pfx_kthread+0x10/0x10 [ 30.408939][ C1] ret_from_fork+0x31/0x70 [ 30.409073][ C1] ? __pfx_kthread+0x10/0x10 [ 30.409204][ C1] ret_from_fork_asm+0x1a/0x30 [ 30.409344][ C1]