[ 30.514395][ C3] BUG: spinlock bad magic on CPU#3, kworker/u16:0/11 [ 30.514606][ C3] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 3 [ 30.514876][ C3] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 30.515076][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 30.515368][ C3] Workqueue: netns cleanup_net [ 30.515507][ C3] Call Trace: [ 30.515611][ C3] [ 30.515692][ C3] dump_stack_lvl+0xb0/0xd0 [ 30.515827][ C3] do_raw_spin_unlock+0x1ac/0x220 [ 30.515999][ C3] _raw_spin_unlock+0x23/0x40 [ 30.516135][ C3] net_tx_action+0x424/0x680 [ 30.516268][ C3] handle_softirqs+0x1f9/0x5c0 [ 30.516399][ C3] ? dev_deactivate_many+0x1e2/0x8d0 [ 30.516533][ C3] do_softirq+0x4d/0xa0 [ 30.516632][ C3] [ 30.516701][ C3] [ 30.516766][ C3] __local_bh_enable_ip+0xf6/0x120 [ 30.516894][ C3] dev_deactivate_many+0x1e7/0x8d0 [ 30.517022][ C3] __dev_close_many+0x12b/0x2d0 [ 30.517150][ C3] ? __pfx___dev_close_many+0x10/0x10 [ 30.517283][ C3] ? __lock_acquire+0xa70/0x1560 [ 30.517413][ C3] dev_close_many+0x202/0x650 [ 30.517542][ C3] ? lock_acquire.part.0+0xeb/0x330 [ 30.517668][ C3] ? default_device_exit_batch+0x81/0x2d0 [ 30.517800][ C3] ? __pfx_dev_close_many+0x10/0x10 [ 30.517929][ C3] ? fou_exit_net+0x2f/0xf0 [ 30.518058][ C3] ? __mutex_trylock_common+0xfa/0x260 [ 30.518187][ C3] unregister_netdevice_many_notify+0x8e5/0x1570 [ 30.518352][ C3] ? lock_acquire+0x32/0xc0 [ 30.518482][ C3] ? trace_contention_end+0xeb/0x150 [ 30.518612][ C3] ? __mutex_lock+0x170/0xac0 [ 30.518742][ C3] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 30.518907][ C3] ? __mutex_lock+0x170/0xac0 [ 30.519035][ C3] ? find_held_lock+0x2c/0x110 [ 30.519166][ C3] ? mutex_is_locked+0x17/0x50 [ 30.519297][ C3] ? rtnl_is_locked+0x15/0x20 [ 30.519428][ C3] ? unregister_netdevice_queue+0x70/0x410 [ 30.519590][ C3] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 30.519749][ C3] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 30.519912][ C3] default_device_exit_batch+0x234/0x2d0 [ 30.520056][ C3] ? __pfx_default_device_exit_batch+0x10/0x10 [ 30.520216][ C3] ? ops_exit_list+0xb4/0x170 [ 30.520349][ C3] cleanup_net+0x4ef/0xb10 [ 30.520476][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.520602][ C3] ? __pfx_cleanup_net+0x10/0x10 [ 30.520728][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 30.520856][ C3] ? process_one_work+0xdf1/0x1670 [ 30.520982][ C3] ? lock_acquire+0x32/0xc0 [ 30.521109][ C3] ? process_one_work+0xdf1/0x1670 [ 30.521236][ C3] process_one_work+0xe3b/0x1670 [ 30.521370][ C3] ? __pfx___lock_release+0x10/0x10 [ 30.521501][ C3] ? __pfx_process_one_work+0x10/0x10 [ 30.521628][ C3] ? assign_work+0x16c/0x240 [ 30.521756][ C3] worker_thread+0x587/0xce0 [ 30.521889][ C3] ? __pfx_worker_thread+0x10/0x10 [ 30.522017][ C3] kthread+0x28a/0x350 [ 30.522116][ C3] ? __pfx_kthread+0x10/0x10 [ 30.522244][ C3] ret_from_fork+0x31/0x70 [ 30.522379][ C3] ? __pfx_kthread+0x10/0x10 [ 30.522509][ C3] ret_from_fork_asm+0x1a/0x30 [ 30.522642][ C3]