[ 31.909778][ C2] BUG: spinlock bad magic on CPU#2, kworker/u16:1/74 [ 31.909985][ C2] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:1/74, .owner_cpu: 2 [ 31.910274][ C2] CPU: 2 UID: 0 PID: 74 Comm: kworker/u16:1 Not tainted 6.10.0-virtme #1 [ 31.910466][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 31.910747][ C2] Workqueue: netns cleanup_net [ 31.910880][ C2] Call Trace: [ 31.910982][ C2] [ 31.911047][ C2] dump_stack_lvl+0xb0/0xd0 [ 31.911181][ C2] do_raw_spin_unlock+0x1ac/0x220 [ 31.911313][ C2] _raw_spin_unlock+0x23/0x40 [ 31.911440][ C2] net_tx_action+0x424/0x680 [ 31.911568][ C2] handle_softirqs+0x1f9/0x5c0 [ 31.911699][ C2] ? dev_deactivate_many+0x1e2/0x8d0 [ 31.911829][ C2] do_softirq+0x4d/0xa0 [ 31.911924][ C2] [ 31.911998][ C2] [ 31.912061][ C2] __local_bh_enable_ip+0xf6/0x120 [ 31.912191][ C2] dev_deactivate_many+0x1e7/0x8d0 [ 31.912318][ C2] __dev_close_many+0x12b/0x2d0 [ 31.912461][ C2] ? __pfx___dev_close_many+0x10/0x10 [ 31.912594][ C2] ? __lock_acquire+0xa70/0x1560 [ 31.912724][ C2] dev_close_many+0x202/0x650 [ 31.912853][ C2] ? lock_acquire.part.0+0xeb/0x330 [ 31.912978][ C2] ? default_device_exit_batch+0x81/0x2d0 [ 31.913103][ C2] ? __pfx_dev_close_many+0x10/0x10 [ 31.913230][ C2] ? fou_exit_net+0x2f/0xf0 [ 31.913360][ C2] ? __mutex_trylock_common+0xfa/0x260 [ 31.913487][ C2] unregister_netdevice_many_notify+0x8e5/0x1570 [ 31.913641][ C2] ? lock_acquire+0x32/0xc0 [ 31.913765][ C2] ? trace_contention_end+0xeb/0x150 [ 31.913893][ C2] ? __mutex_lock+0x170/0xac0 [ 31.914022][ C2] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 31.914177][ C2] ? __mutex_lock+0x170/0xac0 [ 31.914308][ C2] ? find_held_lock+0x2c/0x110 [ 31.914435][ C2] ? mutex_is_locked+0x17/0x50 [ 31.914566][ C2] ? rtnl_is_locked+0x15/0x20 [ 31.914692][ C2] ? unregister_netdevice_queue+0x70/0x410 [ 31.914849][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 31.915004][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 31.915164][ C2] default_device_exit_batch+0x234/0x2d0 [ 31.915299][ C2] ? __pfx_default_device_exit_batch+0x10/0x10 [ 31.915470][ C2] ? ops_exit_list+0xb4/0x170 [ 31.915600][ C2] cleanup_net+0x4ef/0xb10 [ 31.915727][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 31.915853][ C2] ? __pfx_cleanup_net+0x10/0x10 [ 31.915980][ C2] ? trace_lock_acquire+0x14d/0x1f0 [ 31.916108][ C2] ? process_one_work+0xdf1/0x1670 [ 31.916235][ C2] ? lock_acquire+0x32/0xc0 [ 31.916360][ C2] ? process_one_work+0xdf1/0x1670 [ 31.916484][ C2] process_one_work+0xe3b/0x1670 [ 31.916681][ C2] ? __pfx___lock_release+0x10/0x10 [ 31.916807][ C2] ? __pfx_process_one_work+0x10/0x10 [ 31.916935][ C2] ? assign_work+0x16c/0x240 [ 31.917064][ C2] worker_thread+0x587/0xce0 [ 31.917303][ C2] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 31.917460][ C2] ? __pfx_worker_thread+0x10/0x10 [ 31.917584][ C2] ? __pfx_worker_thread+0x10/0x10 [ 31.917708][ C2] kthread+0x28a/0x350 [ 31.917803][ C2] ? __pfx_kthread+0x10/0x10 [ 31.917928][ C2] ret_from_fork+0x31/0x70 [ 31.918064][ C2] ? __pfx_kthread+0x10/0x10 [ 31.918190][ C2] ret_from_fork_asm+0x1a/0x30 [ 31.918320][ C2]