[ 70.989649][ C0] BUG: spinlock bad magic on CPU#0, kworker/u16:0/11 [ 70.989862][ C0] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 0 [ 70.990161][ C0] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 70.990373][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 70.990702][ C0] Workqueue: netns cleanup_net [ 70.990855][ C0] Call Trace: [ 70.990969][ C0] [ 70.991043][ C0] dump_stack_lvl+0xb0/0xd0 [ 70.991194][ C0] do_raw_spin_unlock+0x1ac/0x220 [ 70.991342][ C0] _raw_spin_unlock+0x23/0x40 [ 70.991490][ C0] net_tx_action+0x402/0x660 [ 70.991639][ C0] handle_softirqs+0x1f9/0x5c0 [ 70.991785][ C0] ? dev_deactivate_many+0x1e2/0x8d0 [ 70.991929][ C0] do_softirq+0x4d/0xa0 [ 70.992043][ C0] [ 70.992114][ C0] [ 70.992185][ C0] __local_bh_enable_ip+0xf6/0x120 [ 70.992338][ C0] dev_deactivate_many+0x1e7/0x8d0 [ 70.992483][ C0] __dev_close_many+0x12b/0x2d0 [ 70.992621][ C0] ? __pfx___dev_close_many+0x10/0x10 [ 70.992768][ C0] dev_close_many+0x202/0x650 [ 70.992912][ C0] ? lock_acquire.part.0+0xeb/0x330 [ 70.993057][ C0] ? default_device_exit_batch+0x81/0x2d0 [ 70.993194][ C0] ? __pfx_dev_close_many+0x10/0x10 [ 70.993333][ C0] ? __mutex_trylock_common+0xfa/0x260 [ 70.993477][ C0] unregister_netdevice_many_notify+0x8e5/0x1570 [ 70.993657][ C0] ? lock_acquire+0x32/0xc0 [ 70.993800][ C0] ? trace_contention_end+0xeb/0x150 [ 70.993942][ C0] ? __mutex_lock+0x170/0xac0 [ 70.994091][ C0] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 70.994270][ C0] ? mark_lock+0x38/0x3e0 [ 70.994371][ C0] ? mutex_is_locked+0x17/0x50 [ 70.994520][ C0] ? mutex_is_locked+0x17/0x50 [ 70.994666][ C0] ? rtnl_is_locked+0x15/0x20 [ 70.994804][ C0] ? unregister_netdevice_queue+0x70/0x410 [ 70.994984][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 70.995161][ C0] default_device_exit_batch+0x234/0x2d0 [ 70.995305][ C0] ? __pfx_default_device_exit_batch+0x10/0x10 [ 70.995469][ C0] ? mutex_is_locked+0x17/0x50 [ 70.995610][ C0] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 70.995796][ C0] cleanup_net+0x4ef/0x9d0 [ 70.995934][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 70.996082][ C0] ? __pfx_cleanup_net+0x10/0x10 [ 70.996220][ C0] ? trace_lock_acquire+0x14d/0x1f0 [ 70.996366][ C0] ? process_one_work+0xdf1/0x1670 [ 70.996515][ C0] ? lock_acquire+0x32/0xc0 [ 70.996662][ C0] ? process_one_work+0xdf1/0x1670 [ 70.996809][ C0] process_one_work+0xe3b/0x1670 [ 70.996956][ C0] ? __pfx___lock_release+0x10/0x10 [ 70.997104][ C0] ? __pfx_process_one_work+0x10/0x10 [ 70.997250][ C0] ? assign_work+0x16c/0x240 [ 70.997398][ C0] worker_thread+0x587/0xce0 [ 70.997546][ C0] ? __pfx_worker_thread+0x10/0x10 [ 70.997693][ C0] kthread+0x28a/0x350 [ 70.997804][ C0] ? __pfx_kthread+0x10/0x10 [ 70.997955][ C0] ret_from_fork+0x31/0x70 [ 70.998102][ C0] ? __pfx_kthread+0x10/0x10 [ 70.998246][ C0] ret_from_fork_asm+0x1a/0x30 [ 70.998399][ C0]