[ 39.222236][ C0] BUG: spinlock bad magic on CPU#0, kworker/u16:1/75 [ 39.222483][ C0] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:1/75, .owner_cpu: 0 [ 39.222822][ C0] CPU: 0 UID: 0 PID: 75 Comm: kworker/u16:1 Not tainted 6.10.0-virtme #1 [ 39.223080][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 39.223456][ C0] Workqueue: netns cleanup_net [ 39.223638][ C0] Call Trace: [ 39.223764][ C0] [ 39.223848][ C0] dump_stack_lvl+0xb0/0xd0 [ 39.224015][ C0] do_raw_spin_unlock+0x1ac/0x220 [ 39.224181][ C0] _raw_spin_unlock+0x23/0x40 [ 39.224341][ C0] net_tx_action+0x402/0x660 [ 39.224503][ C0] handle_softirqs+0x1f9/0x5c0 [ 39.224664][ C0] ? dev_deactivate_many+0x1e2/0x8d0 [ 39.224830][ C0] do_softirq+0x4d/0xa0 [ 39.224952][ C0] [ 39.225040][ C0] [ 39.225121][ C0] __local_bh_enable_ip+0xf6/0x120 [ 39.225280][ C0] dev_deactivate_many+0x1e7/0x8d0 [ 39.225440][ C0] __dev_close_many+0x12b/0x2d0 [ 39.225598][ C0] ? __pfx___dev_close_many+0x10/0x10 [ 39.225759][ C0] dev_close_many+0x202/0x650 [ 39.225922][ C0] ? lock_acquire.part.0+0xeb/0x330 [ 39.226082][ C0] ? default_device_exit_batch+0x81/0x2d0 [ 39.226244][ C0] ? __pfx_dev_close_many+0x10/0x10 [ 39.226400][ C0] ? __mutex_trylock_common+0xfa/0x260 [ 39.226559][ C0] unregister_netdevice_many_notify+0x8e5/0x1570 [ 39.226765][ C0] ? lock_acquire+0x32/0xc0 [ 39.226920][ C0] ? trace_contention_end+0xeb/0x150 [ 39.227095][ C0] ? __mutex_lock+0x170/0xac0 [ 39.227254][ C0] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 39.227461][ C0] ? mutex_is_locked+0x17/0x50 [ 39.227615][ C0] ? rtnl_is_locked+0x15/0x20 [ 39.227773][ C0] ? unregister_netdevice_queue+0x70/0x410 [ 39.227967][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 39.228158][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 39.228352][ C0] default_device_exit_batch+0x234/0x2d0 [ 39.228506][ C0] ? __pfx_default_device_exit_batch+0x10/0x10 [ 39.228699][ C0] ? mutex_is_locked+0x17/0x50 [ 39.228856][ C0] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 39.229054][ C0] cleanup_net+0x4ef/0x9d0 [ 39.229215][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.229369][ C0] ? __pfx_cleanup_net+0x10/0x10 [ 39.229521][ C0] ? trace_lock_acquire+0x14d/0x1f0 [ 39.229679][ C0] ? process_one_work+0xdf1/0x1670 [ 39.229832][ C0] ? lock_acquire+0x32/0xc0 [ 39.229984][ C0] ? process_one_work+0xdf1/0x1670 [ 39.230139][ C0] process_one_work+0xe3b/0x1670 [ 39.230294][ C0] ? __pfx___lock_release+0x10/0x10 [ 39.230450][ C0] ? __pfx_process_one_work+0x10/0x10 [ 39.230606][ C0] ? assign_work+0x16c/0x240 [ 39.230767][ C0] worker_thread+0x587/0xce0 [ 39.230926][ C0] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 39.231124][ C0] ? __pfx_worker_thread+0x10/0x10 [ 39.231287][ C0] ? __pfx_worker_thread+0x10/0x10 [ 39.231441][ C0] kthread+0x28a/0x350 [ 39.231559][ C0] ? __pfx_kthread+0x10/0x10 [ 39.231714][ C0] ret_from_fork+0x31/0x70 [ 39.231869][ C0] ? __pfx_kthread+0x10/0x10 [ 39.232023][ C0] ret_from_fork_asm+0x1a/0x30 [ 39.232183][ C0]