[ 31.349688][ C0] BUG: spinlock bad magic on CPU#0, kworker/u16:0/11 [ 31.349893][ C0] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 0 [ 31.350161][ C0] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 31.350357][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 31.350632][ C0] Workqueue: netns cleanup_net [ 31.350769][ C0] Call Trace: [ 31.350875][ C0] [ 31.350941][ C0] dump_stack_lvl+0xb0/0xd0 [ 31.351078][ C0] do_raw_spin_unlock+0x1ac/0x220 [ 31.351214][ C0] _raw_spin_unlock+0x23/0x40 [ 31.351345][ C0] net_tx_action+0x424/0x680 [ 31.351474][ C0] handle_softirqs+0x1f9/0x5c0 [ 31.351607][ C0] ? dev_deactivate_many+0x1e2/0x8d0 [ 31.351736][ C0] do_softirq+0x4d/0xa0 [ 31.351833][ C0] [ 31.351902][ C0] [ 31.351968][ C0] __local_bh_enable_ip+0xf6/0x120 [ 31.352092][ C0] dev_deactivate_many+0x1e7/0x8d0 [ 31.352215][ C0] __dev_close_many+0x12b/0x2d0 [ 31.352345][ C0] ? __pfx___dev_close_many+0x10/0x10 [ 31.352479][ C0] ? __lock_acquire+0xa70/0x1560 [ 31.352610][ C0] dev_close_many+0x202/0x650 [ 31.352743][ C0] ? lock_acquire.part.0+0xeb/0x330 [ 31.352870][ C0] ? default_device_exit_batch+0x81/0x2d0 [ 31.352998][ C0] ? __pfx_dev_close_many+0x10/0x10 [ 31.353125][ C0] ? fou_exit_net+0x2f/0xf0 [ 31.353252][ C0] ? __mutex_trylock_common+0xfa/0x260 [ 31.353380][ C0] unregister_netdevice_many_notify+0x8e5/0x1570 [ 31.353539][ C0] ? lock_acquire+0x32/0xc0 [ 31.353659][ C0] ? trace_contention_end+0xeb/0x150 [ 31.353789][ C0] ? __mutex_lock+0x170/0xac0 [ 31.353921][ C0] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 31.354081][ C0] ? __mutex_lock+0x170/0xac0 [ 31.354207][ C0] ? find_held_lock+0x2c/0x110 [ 31.354336][ C0] ? mutex_is_locked+0x17/0x50 [ 31.354462][ C0] ? mutex_is_locked+0x17/0x50 [ 31.354595][ C0] ? rtnl_is_locked+0x15/0x20 [ 31.354719][ C0] ? unregister_netdevice_queue+0x70/0x410 [ 31.354873][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 31.355032][ C0] default_device_exit_batch+0x234/0x2d0 [ 31.355162][ C0] ? __pfx_default_device_exit_batch+0x10/0x10 [ 31.355320][ C0] ? ops_exit_list+0xb4/0x170 [ 31.355446][ C0] cleanup_net+0x4ef/0xb10 [ 31.355573][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 31.355700][ C0] ? __pfx_cleanup_net+0x10/0x10 [ 31.355826][ C0] ? trace_lock_acquire+0x14d/0x1f0 [ 31.355956][ C0] ? process_one_work+0xdf1/0x1670 [ 31.356081][ C0] ? lock_acquire+0x32/0xc0 [ 31.356219][ C0] ? process_one_work+0xdf1/0x1670 [ 31.356349][ C0] process_one_work+0xe3b/0x1670 [ 31.356478][ C0] ? __pfx___lock_release+0x10/0x10 [ 31.356609][ C0] ? __pfx_process_one_work+0x10/0x10 [ 31.356739][ C0] ? assign_work+0x16c/0x240 [ 31.356871][ C0] worker_thread+0x587/0xce0 [ 31.357000][ C0] ? __pfx_worker_thread+0x10/0x10 [ 31.357125][ C0] kthread+0x28a/0x350 [ 31.357226][ C0] ? __pfx_kthread+0x10/0x10 [ 31.357358][ C0] ret_from_fork+0x31/0x70 [ 31.357491][ C0] ? __pfx_kthread+0x10/0x10 [ 31.357619][ C0] ret_from_fork_asm+0x1a/0x30 [ 31.357749][ C0]