[ 62.343581][ C2] BUG: spinlock bad magic on CPU#2, kworker/u16:0/11 [ 62.343784][ C2] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 2 [ 62.344070][ C2] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 62.344301][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 62.344583][ C2] Workqueue: netns cleanup_net [ 62.344722][ C2] Call Trace: [ 62.344828][ C2] [ 62.344896][ C2] dump_stack_lvl+0xb0/0xd0 [ 62.345027][ C2] do_raw_spin_unlock+0x1ac/0x220 [ 62.345159][ C2] _raw_spin_unlock+0x23/0x40 [ 62.345301][ C2] net_tx_action+0x402/0x660 [ 62.345438][ C2] handle_softirqs+0x1f9/0x5c0 [ 62.345568][ C2] ? dev_deactivate_many+0x1e2/0x8d0 [ 62.345700][ C2] do_softirq+0x4d/0xa0 [ 62.345800][ C2] [ 62.345866][ C2] [ 62.345928][ C2] __local_bh_enable_ip+0xf6/0x120 [ 62.346064][ C2] dev_deactivate_many+0x1e7/0x8d0 [ 62.346189][ C2] __dev_close_many+0x12b/0x2d0 [ 62.346329][ C2] ? __pfx___dev_close_many+0x10/0x10 [ 62.346456][ C2] dev_close_many+0x202/0x650 [ 62.346582][ C2] ? lock_acquire.part.0+0xeb/0x330 [ 62.346706][ C2] ? default_device_exit_batch+0x81/0x2d0 [ 62.346831][ C2] ? __pfx_dev_close_many+0x10/0x10 [ 62.346955][ C2] ? __mutex_trylock_common+0xfa/0x260 [ 62.347082][ C2] unregister_netdevice_many_notify+0x8e5/0x1570 [ 62.347239][ C2] ? lock_acquire+0x32/0xc0 [ 62.347368][ C2] ? trace_contention_end+0xeb/0x150 [ 62.347497][ C2] ? __mutex_lock+0x170/0xac0 [ 62.347625][ C2] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 62.347778][ C2] ? mark_lock+0x38/0x3e0 [ 62.347872][ C2] ? mutex_is_locked+0x17/0x50 [ 62.347994][ C2] ? rtnl_is_locked+0x15/0x20 [ 62.348119][ C2] ? unregister_netdevice_queue+0x70/0x410 [ 62.348276][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 62.348470][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 62.348624][ C2] default_device_exit_batch+0x234/0x2d0 [ 62.348751][ C2] ? __pfx_default_device_exit_batch+0x10/0x10 [ 62.348905][ C2] ? mutex_is_locked+0x17/0x50 [ 62.349029][ C2] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 62.349185][ C2] cleanup_net+0x4ef/0x9d0 [ 62.349320][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 62.349448][ C2] ? __pfx_cleanup_net+0x10/0x10 [ 62.349571][ C2] ? trace_lock_acquire+0x14d/0x1f0 [ 62.349698][ C2] ? process_one_work+0xdf1/0x1670 [ 62.349822][ C2] ? lock_acquire+0x32/0xc0 [ 62.349948][ C2] ? process_one_work+0xdf1/0x1670 [ 62.350072][ C2] process_one_work+0xe3b/0x1670 [ 62.350197][ C2] ? __pfx___lock_release+0x10/0x10 [ 62.350330][ C2] ? __pfx_process_one_work+0x10/0x10 [ 62.350459][ C2] ? assign_work+0x16c/0x240 [ 62.350585][ C2] worker_thread+0x587/0xce0 [ 62.350710][ C2] ? __pfx_worker_thread+0x10/0x10 [ 62.350834][ C2] kthread+0x28a/0x350 [ 62.350928][ C2] ? __pfx_kthread+0x10/0x10 [ 62.351052][ C2] ret_from_fork+0x31/0x70 [ 62.351176][ C2] ? __pfx_kthread+0x10/0x10 [ 62.351303][ C2] ret_from_fork_asm+0x1a/0x30 [ 62.351450][ C2]