[ 24.819500][ C2] BUG: spinlock bad magic on CPU#2, kworker/u16:0/11 [ 24.819706][ C2] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 2 [ 24.819995][ C2] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 24.820195][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 24.820480][ C2] Workqueue: netns cleanup_net [ 24.820617][ C2] Call Trace: [ 24.820732][ C2] [ 24.820803][ C2] dump_stack_lvl+0xb0/0xd0 [ 24.820937][ C2] do_raw_spin_unlock+0x1ac/0x220 [ 24.821068][ C2] _raw_spin_unlock+0x23/0x40 [ 24.821203][ C2] net_tx_action+0x424/0x680 [ 24.821335][ C2] handle_softirqs+0x1f9/0x5c0 [ 24.821464][ C2] ? dev_deactivate_many+0x1e2/0x8d0 [ 24.821596][ C2] do_softirq+0x4d/0xa0 [ 24.821692][ C2] [ 24.821756][ C2] [ 24.821827][ C2] __local_bh_enable_ip+0xf6/0x120 [ 24.821956][ C2] dev_deactivate_many+0x1e7/0x8d0 [ 24.822094][ C2] __dev_close_many+0x12b/0x2d0 [ 24.822227][ C2] ? __pfx___dev_close_many+0x10/0x10 [ 24.822356][ C2] ? __lock_acquire+0xa70/0x1560 [ 24.822486][ C2] dev_close_many+0x202/0x650 [ 24.822613][ C2] ? lock_acquire.part.0+0xeb/0x330 [ 24.822747][ C2] ? default_device_exit_batch+0x81/0x2d0 [ 24.822881][ C2] ? __pfx_dev_close_many+0x10/0x10 [ 24.823085][ C2] ? fou_exit_net+0x2f/0xf0 [ 24.823217][ C2] ? __mutex_trylock_common+0xfa/0x260 [ 24.823345][ C2] unregister_netdevice_many_notify+0x8e5/0x1570 [ 24.823500][ C2] ? lock_acquire+0x32/0xc0 [ 24.823705][ C2] ? trace_contention_end+0xeb/0x150 [ 24.823831][ C2] ? __mutex_lock+0x170/0xac0 [ 24.823959][ C2] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 24.824113][ C2] ? __mutex_lock+0x170/0xac0 [ 24.824246][ C2] ? find_held_lock+0x2c/0x110 [ 24.824374][ C2] ? mutex_is_locked+0x17/0x50 [ 24.824500][ C2] ? mutex_is_locked+0x17/0x50 [ 24.824624][ C2] ? rtnl_is_locked+0x15/0x20 [ 24.824823][ C2] ? unregister_netdevice_queue+0x70/0x410 [ 24.824980][ C2] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 24.825139][ C2] default_device_exit_batch+0x234/0x2d0 [ 24.825267][ C2] ? __pfx_default_device_exit_batch+0x10/0x10 [ 24.825499][ C2] ? ops_exit_list+0xb4/0x170 [ 24.825627][ C2] cleanup_net+0x4ef/0xb10 [ 24.825753][ C2] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.825879][ C2] ? __pfx_cleanup_net+0x10/0x10 [ 24.826075][ C2] ? trace_lock_acquire+0x14d/0x1f0 [ 24.826203][ C2] ? process_one_work+0xdf1/0x1670 [ 24.826328][ C2] ? lock_acquire+0x32/0xc0 [ 24.826455][ C2] ? process_one_work+0xdf1/0x1670 [ 24.826657][ C2] process_one_work+0xe3b/0x1670 [ 24.826786][ C2] ? __pfx___lock_release+0x10/0x10 [ 24.826914][ C2] ? __pfx_process_one_work+0x10/0x10 [ 24.827041][ C2] ? assign_work+0x16c/0x240 [ 24.827238][ C2] worker_thread+0x587/0xce0 [ 24.827368][ C2] ? __pfx_worker_thread+0x10/0x10 [ 24.827494][ C2] kthread+0x28a/0x350 [ 24.827593][ C2] ? __pfx_kthread+0x10/0x10 [ 24.827722][ C2] ret_from_fork+0x31/0x70 [ 24.827919][ C2] ? __pfx_kthread+0x10/0x10 [ 24.828046][ C2] ret_from_fork_asm+0x1a/0x30 [ 24.828179][ C2]