[ 45.096818][ C1] BUG: spinlock bad magic on CPU#1, kworker/u16:1/73 [ 45.097036][ C1] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:1/73, .owner_cpu: 1 [ 45.097348][ C1] CPU: 1 UID: 0 PID: 73 Comm: kworker/u16:1 Not tainted 6.10.0-virtme #1 [ 45.097554][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 45.097845][ C1] Workqueue: netns cleanup_net [ 45.097983][ C1] Call Trace: [ 45.098089][ C1] [ 45.098162][ C1] dump_stack_lvl+0xb0/0xd0 [ 45.098303][ C1] do_raw_spin_unlock+0x1ac/0x220 [ 45.098435][ C1] _raw_spin_unlock+0x23/0x40 [ 45.098562][ C1] net_tx_action+0x402/0x660 [ 45.098712][ C1] handle_softirqs+0x1f9/0x5c0 [ 45.098850][ C1] ? dev_deactivate_many+0x1e2/0x8d0 [ 45.098983][ C1] do_softirq+0x4d/0xa0 [ 45.099083][ C1] [ 45.099152][ C1] [ 45.099221][ C1] __local_bh_enable_ip+0xf6/0x120 [ 45.099357][ C1] dev_deactivate_many+0x1e7/0x8d0 [ 45.099489][ C1] __dev_close_many+0x12b/0x2d0 [ 45.099616][ C1] ? __pfx___dev_close_many+0x10/0x10 [ 45.099753][ C1] dev_close_many+0x202/0x650 [ 45.099878][ C1] ? lock_acquire.part.0+0xeb/0x330 [ 45.100008][ C1] ? default_device_exit_batch+0x81/0x2d0 [ 45.100134][ C1] ? __pfx_dev_close_many+0x10/0x10 [ 45.100267][ C1] ? __mutex_trylock_common+0xfa/0x260 [ 45.100399][ C1] unregister_netdevice_many_notify+0x8e5/0x1570 [ 45.100563][ C1] ? lock_acquire+0x32/0xc0 [ 45.100687][ C1] ? trace_contention_end+0xeb/0x150 [ 45.100818][ C1] ? __mutex_lock+0x170/0xac0 [ 45.100962][ C1] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 45.101121][ C1] ? mark_lock+0x38/0x3e0 [ 45.101228][ C1] ? mutex_is_locked+0x17/0x50 [ 45.101357][ C1] ? mutex_is_locked+0x17/0x50 [ 45.101484][ C1] ? rtnl_is_locked+0x15/0x20 [ 45.101611][ C1] ? unregister_netdevice_queue+0x70/0x410 [ 45.101767][ C1] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 45.101926][ C1] default_device_exit_batch+0x234/0x2d0 [ 45.102050][ C1] ? __pfx_default_device_exit_batch+0x10/0x10 [ 45.102210][ C1] ? mutex_is_locked+0x17/0x50 [ 45.102334][ C1] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 45.102498][ C1] cleanup_net+0x4ef/0x9d0 [ 45.102652][ C1] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.102795][ C1] ? __pfx_cleanup_net+0x10/0x10 [ 45.102926][ C1] ? trace_lock_acquire+0x14d/0x1f0 [ 45.103053][ C1] ? process_one_work+0xdf1/0x1670 [ 45.103182][ C1] ? lock_acquire+0x32/0xc0 [ 45.103312][ C1] ? process_one_work+0xdf1/0x1670 [ 45.103436][ C1] process_one_work+0xe3b/0x1670 [ 45.103566][ C1] ? __pfx___lock_release+0x10/0x10 [ 45.103687][ C1] ? __pfx_process_one_work+0x10/0x10 [ 45.103816][ C1] ? assign_work+0x16c/0x240 [ 45.103950][ C1] worker_thread+0x587/0xce0 [ 45.104076][ C1] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 45.104231][ C1] ? __pfx_worker_thread+0x10/0x10 [ 45.104357][ C1] ? __pfx_worker_thread+0x10/0x10 [ 45.104486][ C1] kthread+0x28a/0x350 [ 45.104586][ C1] ? __pfx_kthread+0x10/0x10 [ 45.104710][ C1] ret_from_fork+0x31/0x70 [ 45.104847][ C1] ? __pfx_kthread+0x10/0x10 [ 45.104975][ C1] ret_from_fork_asm+0x1a/0x30 [ 45.105107][ C1]