[ 50.367366][ C3] BUG: spinlock bad magic on CPU#3, kworker/u16:0/11 [ 50.367605][ C3] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 3 [ 50.367864][ C3] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 50.368057][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 50.368351][ C3] Workqueue: netns cleanup_net [ 50.368535][ C3] Call Trace: [ 50.368688][ C3] [ 50.368797][ C3] dump_stack_lvl+0xb0/0xd0 [ 50.369001][ C3] do_raw_spin_unlock+0x1ac/0x220 [ 50.369206][ C3] _raw_spin_unlock+0x23/0x40 [ 50.369411][ C3] net_tx_action+0x402/0x660 [ 50.369612][ C3] handle_softirqs+0x1f9/0x5c0 [ 50.369806][ C3] ? dev_deactivate_many+0x1e2/0x8d0 [ 50.370011][ C3] do_softirq+0x4d/0xa0 [ 50.370158][ C3] [ 50.370266][ C3] [ 50.370367][ C3] __local_bh_enable_ip+0xf6/0x120 [ 50.370563][ C3] dev_deactivate_many+0x1e7/0x8d0 [ 50.370760][ C3] __dev_close_many+0x12b/0x2d0 [ 50.370976][ C3] ? __pfx___dev_close_many+0x10/0x10 [ 50.371176][ C3] dev_close_many+0x202/0x650 [ 50.371372][ C3] ? lock_acquire.part.0+0xeb/0x330 [ 50.371575][ C3] ? default_device_exit_batch+0x81/0x2d0 [ 50.371777][ C3] ? __pfx_dev_close_many+0x10/0x10 [ 50.371983][ C3] ? __mutex_trylock_common+0xfa/0x260 [ 50.372193][ C3] unregister_netdevice_many_notify+0x8e5/0x1570 [ 50.372458][ C3] ? lock_acquire+0x32/0xc0 [ 50.372663][ C3] ? trace_contention_end+0xeb/0x150 [ 50.372871][ C3] ? __mutex_lock+0x170/0xac0 [ 50.373087][ C3] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 50.373353][ C3] ? mark_lock+0x38/0x3e0 [ 50.373517][ C3] ? mutex_is_locked+0x17/0x50 [ 50.373728][ C3] ? rtnl_is_locked+0x15/0x20 [ 50.373945][ C3] ? unregister_netdevice_queue+0x70/0x410 [ 50.374220][ C3] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 50.374476][ C3] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 50.374743][ C3] default_device_exit_batch+0x234/0x2d0 [ 50.374952][ C3] ? __pfx_default_device_exit_batch+0x10/0x10 [ 50.375223][ C3] ? mutex_is_locked+0x17/0x50 [ 50.375430][ C3] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 50.375693][ C3] cleanup_net+0x4ef/0x9d0 [ 50.375912][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 50.376122][ C3] ? __pfx_cleanup_net+0x10/0x10 [ 50.376338][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 50.376554][ C3] ? process_one_work+0xdf1/0x1670 [ 50.376762][ C3] ? lock_acquire+0x32/0xc0 [ 50.376970][ C3] ? process_one_work+0xdf1/0x1670 [ 50.377182][ C3] process_one_work+0xe3b/0x1670 [ 50.377392][ C3] ? __pfx___lock_release+0x10/0x10 [ 50.377613][ C3] ? __pfx_process_one_work+0x10/0x10 [ 50.377839][ C3] ? assign_work+0x16c/0x240 [ 50.378055][ C3] worker_thread+0x587/0xce0 [ 50.378270][ C3] ? __pfx_worker_thread+0x10/0x10 [ 50.378480][ C3] kthread+0x28a/0x350 [ 50.378639][ C3] ? __pfx_kthread+0x10/0x10 [ 50.378848][ C3] ret_from_fork+0x31/0x70 [ 50.379052][ C3] ? __pfx_kthread+0x10/0x10 [ 50.379265][ C3] ret_from_fork_asm+0x1a/0x30 [ 50.379494][ C3]