[ 66.069441][ C1] BUG: spinlock bad magic on CPU#1, kworker/u16:1/73 [ 66.069772][ C1] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:1/73, .owner_cpu: 1 [ 66.070186][ C1] CPU: 1 UID: 0 PID: 73 Comm: kworker/u16:1 Not tainted 6.10.0-virtme #1 [ 66.070463][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 66.070956][ C1] Workqueue: netns cleanup_net [ 66.071161][ C1] Call Trace: [ 66.071318][ C1] [ 66.071427][ C1] dump_stack_lvl+0xb0/0xd0 [ 66.071655][ C1] do_raw_spin_unlock+0x1ac/0x220 [ 66.071881][ C1] _raw_spin_unlock+0x23/0x40 [ 66.072075][ C1] net_tx_action+0x402/0x660 [ 66.072289][ C1] handle_softirqs+0x1f9/0x5c0 [ 66.072497][ C1] ? dev_deactivate_many+0x1e2/0x8d0 [ 66.072713][ C1] do_softirq+0x4d/0xa0 [ 66.072904][ C1] [ 66.073030][ C1] [ 66.073159][ C1] __local_bh_enable_ip+0xf6/0x120 [ 66.073369][ C1] dev_deactivate_many+0x1e7/0x8d0 [ 66.073576][ C1] __dev_close_many+0x12b/0x2d0 [ 66.073786][ C1] ? __pfx___dev_close_many+0x10/0x10 [ 66.073982][ C1] dev_close_many+0x202/0x650 [ 66.074179][ C1] ? lock_acquire.part.0+0xeb/0x330 [ 66.074381][ C1] ? default_device_exit_batch+0x81/0x2d0 [ 66.074576][ C1] ? __pfx_dev_close_many+0x10/0x10 [ 66.074784][ C1] ? __mutex_trylock_common+0xfa/0x260 [ 66.074993][ C1] unregister_netdevice_many_notify+0x8e5/0x1570 [ 66.075231][ C1] ? lock_acquire+0x32/0xc0 [ 66.075431][ C1] ? trace_contention_end+0xeb/0x150 [ 66.075630][ C1] ? __mutex_lock+0x170/0xac0 [ 66.075838][ C1] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 66.076101][ C1] ? mark_lock+0x38/0x3e0 [ 66.076267][ C1] ? mutex_is_locked+0x17/0x50 [ 66.076467][ C1] ? rtnl_is_locked+0x15/0x20 [ 66.076679][ C1] ? unregister_netdevice_queue+0x70/0x410 [ 66.076923][ C1] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 66.077174][ C1] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 66.077446][ C1] default_device_exit_batch+0x234/0x2d0 [ 66.077646][ C1] ? __pfx_default_device_exit_batch+0x10/0x10 [ 66.077884][ C1] ? mutex_is_locked+0x17/0x50 [ 66.078095][ C1] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 66.078345][ C1] cleanup_net+0x4ef/0x9d0 [ 66.078536][ C1] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 66.078721][ C1] ? __pfx_cleanup_net+0x10/0x10 [ 66.078921][ C1] ? trace_lock_acquire+0x14d/0x1f0 [ 66.079129][ C1] ? process_one_work+0xdf1/0x1670 [ 66.079316][ C1] ? lock_acquire+0x32/0xc0 [ 66.079513][ C1] ? process_one_work+0xdf1/0x1670 [ 66.079710][ C1] process_one_work+0xe3b/0x1670 [ 66.079918][ C1] ? __pfx___lock_release+0x10/0x10 [ 66.080110][ C1] ? __pfx_process_one_work+0x10/0x10 [ 66.080297][ C1] ? assign_work+0x16c/0x240 [ 66.080492][ C1] worker_thread+0x587/0xce0 [ 66.080701][ C1] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 66.080957][ C1] ? __pfx_worker_thread+0x10/0x10 [ 66.081152][ C1] ? __pfx_worker_thread+0x10/0x10 [ 66.081336][ C1] kthread+0x28a/0x350 [ 66.081477][ C1] ? __pfx_kthread+0x10/0x10 [ 66.081653][ C1] ret_from_fork+0x31/0x70 [ 66.081841][ C1] ? __pfx_kthread+0x10/0x10 [ 66.082042][ C1] ret_from_fork_asm+0x1a/0x30 [ 66.082247][ C1]