[ 27.796310][ C0] BUG: spinlock bad magic on CPU#0, kworker/u16:0/11 [ 27.796533][ C0] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 0 [ 27.796833][ C0] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 27.797052][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 27.797370][ C0] Workqueue: netns cleanup_net [ 27.797527][ C0] Call Trace: [ 27.797651][ C0] [ 27.797726][ C0] dump_stack_lvl+0xb0/0xd0 [ 27.797881][ C0] do_raw_spin_unlock+0x1ac/0x220 [ 27.798034][ C0] _raw_spin_unlock+0x23/0x40 [ 27.798183][ C0] net_tx_action+0x424/0x680 [ 27.798331][ C0] handle_softirqs+0x1f9/0x5c0 [ 27.798482][ C0] ? dev_deactivate_many+0x1e2/0x8d0 [ 27.798629][ C0] do_softirq+0x4d/0xa0 [ 27.798740][ C0] [ 27.798815][ C0] [ 27.798888][ C0] __local_bh_enable_ip+0xf6/0x120 [ 27.799036][ C0] dev_deactivate_many+0x1e7/0x8d0 [ 27.799185][ C0] __dev_close_many+0x12b/0x2d0 [ 27.799328][ C0] ? __pfx___dev_close_many+0x10/0x10 [ 27.799471][ C0] ? __lock_acquire+0xa70/0x1560 [ 27.799615][ C0] dev_close_many+0x202/0x650 [ 27.799755][ C0] ? lock_acquire.part.0+0xeb/0x330 [ 27.799898][ C0] ? default_device_exit_batch+0x81/0x2d0 [ 27.800041][ C0] ? __pfx_dev_close_many+0x10/0x10 [ 27.800190][ C0] ? fou_exit_net+0x2f/0xf0 [ 27.800346][ C0] ? __mutex_trylock_common+0xfa/0x260 [ 27.800487][ C0] unregister_netdevice_many_notify+0x8e5/0x1570 [ 27.800666][ C0] ? lock_acquire+0x32/0xc0 [ 27.800801][ C0] ? trace_contention_end+0xeb/0x150 [ 27.800946][ C0] ? __mutex_lock+0x170/0xac0 [ 27.801084][ C0] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 27.801258][ C0] ? __mutex_lock+0x170/0xac0 [ 27.801419][ C0] ? find_held_lock+0x2c/0x110 [ 27.801570][ C0] ? mutex_is_locked+0x17/0x50 [ 27.801703][ C0] ? rtnl_is_locked+0x15/0x20 [ 27.801854][ C0] ? unregister_netdevice_queue+0x70/0x410 [ 27.802024][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 27.802196][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 27.802367][ C0] default_device_exit_batch+0x234/0x2d0 [ 27.802504][ C0] ? __pfx_default_device_exit_batch+0x10/0x10 [ 27.802693][ C0] ? ops_exit_list+0xb4/0x170 [ 27.802835][ C0] cleanup_net+0x4ef/0xb10 [ 27.802972][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 27.803112][ C0] ? __pfx_cleanup_net+0x10/0x10 [ 27.803261][ C0] ? trace_lock_acquire+0x14d/0x1f0 [ 27.803403][ C0] ? process_one_work+0xdf1/0x1670 [ 27.803539][ C0] ? lock_acquire+0x32/0xc0 [ 27.803682][ C0] ? process_one_work+0xdf1/0x1670 [ 27.803823][ C0] process_one_work+0xe3b/0x1670 [ 27.803964][ C0] ? __pfx___lock_release+0x10/0x10 [ 27.804107][ C0] ? __pfx_process_one_work+0x10/0x10 [ 27.804244][ C0] ? assign_work+0x16c/0x240 [ 27.804386][ C0] worker_thread+0x587/0xce0 [ 27.804528][ C0] ? __pfx_worker_thread+0x10/0x10 [ 27.804666][ C0] kthread+0x28a/0x350 [ 27.804783][ C0] ? __pfx_kthread+0x10/0x10 [ 27.804924][ C0] ret_from_fork+0x31/0x70 [ 27.805073][ C0] ? __pfx_kthread+0x10/0x10 [ 27.805214][ C0] ret_from_fork_asm+0x1a/0x30 [ 27.805367][ C0]