[ 41.986657][ C2] BUG: spinlock bad magic on CPU#2, kworker/u16:0/11 [ 41.986928][ C2] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 2 [ 41.987206][ C2] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 41.987404][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 41.987686][ C2] Workqueue: netns cleanup_net [ 41.987825][ C2] Call Trace: [ 41.987924][ C2] [ 41.987993][ C2] dump_stack_lvl+0xb0/0xd0 [ 41.988132][ C2] do_raw_spin_unlock+0x1ac/0x220 [ 41.988271][ C2] _raw_spin_unlock+0x23/0x40 [ 41.988408][ C2] net_tx_action+0x402/0x660 [ 41.988543][ C2] handle_softirqs+0x1f9/0x5c0 [ 41.988676][ C2] ? dev_deactivate_many+0x1e2/0x8d0 [ 41.988811][ C2] do_softirq+0x4d/0xa0 [ 41.988908][ C2] [ 41.988976][ C2] [ 41.989042][ C2] __local_bh_enable_ip+0xf6/0x120 [ 41.989176][ C2] dev_deactivate_many+0x1e7/0x8d0 [ 41.989310][ C2] __dev_close_many+0x12b/0x2d0 [ 41.989444][ C2] ? __pfx___dev_close_many+0x10/0x10 [ 41.989592][ C2] dev_close_many+0x202/0x650 [ 41.989721][ C2] ? lock_acquire.part.0+0xeb/0x330 [ 41.989849][ C2] ? default_device_exit_batch+0x81/0x2d0 [ 41.989978][ C2] ? __pfx_dev_close_many+0x10/0x10 [ 41.990105][ C2] ? __mutex_trylock_common+0xfa/0x260 [ 41.990234][ C2] unregister_netdevice_many_notify+0x8e5/0x1570 [ 41.990392][ C2] ? lock_acquire+0x32/0xc0 [ 41.990529][ C2] ? trace_contention_end+0xeb/0x150 [ 41.990661][ C2] ? __mutex_lock+0x170/0xac0 [ 41.990791][ C2] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 41.990947][ C2] ? mark_lock+0x38/0x3e0 [ 41.991046][ C2] ? mutex_is_locked+0x17/0x50 [ 41.991172][ C2] ? rtnl_is_locked+0x15/0x20 [ 41.991309][ C2] ? unregister_netdevice_queue+0x70/0x410 [ 41.991471][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 41.991629][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 41.991792][ C2] default_device_exit_batch+0x234/0x2d0 [ 41.991917][ C2] ? __pfx_default_device_exit_batch+0x10/0x10 [ 41.992073][ C2] ? mutex_is_locked+0x17/0x50 [ 41.992203][ C2] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 41.992364][ C2] cleanup_net+0x4ef/0x9d0 [ 41.992492][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.992616][ C2] ? __pfx_cleanup_net+0x10/0x10 [ 41.992749][ C2] ? trace_lock_acquire+0x14d/0x1f0 [ 41.992878][ C2] ? process_one_work+0xdf1/0x1670 [ 41.993006][ C2] ? lock_acquire+0x32/0xc0 [ 41.993132][ C2] ? process_one_work+0xdf1/0x1670 [ 41.993261][ C2] process_one_work+0xe3b/0x1670 [ 41.993390][ C2] ? __pfx___lock_release+0x10/0x10 [ 41.993516][ C2] ? __pfx_process_one_work+0x10/0x10 [ 41.993644][ C2] ? assign_work+0x16c/0x240 [ 41.993784][ C2] worker_thread+0x587/0xce0 [ 41.993913][ C2] ? __pfx_worker_thread+0x10/0x10 [ 41.994040][ C2] kthread+0x28a/0x350 [ 41.994136][ C2] ? __pfx_kthread+0x10/0x10 [ 41.994262][ C2] ret_from_fork+0x31/0x70 [ 41.994395][ C2] ? __pfx_kthread+0x10/0x10 [ 41.994522][ C2] ret_from_fork_asm+0x1a/0x30 [ 41.994656][ C2]