[ 26.910811][ C0] TCP: request_sock_TCP: Possible SYN flooding on port 10.0.254.1:7010. Sending cookies. [ 29.050018][ C0] BUG: spinlock bad magic on CPU#0, kworker/u16:0/11 [ 29.050217][ C0] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: kworker/u16:0/11, .owner_cpu: 0 [ 29.050505][ C0] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.10.0-virtme #1 [ 29.050697][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 29.050987][ C0] Workqueue: netns cleanup_net [ 29.051133][ C0] Call Trace: [ 29.051237][ C0] [ 29.051309][ C0] dump_stack_lvl+0xb0/0xd0 [ 29.051450][ C0] do_raw_spin_unlock+0x1ac/0x220 [ 29.051587][ C0] _raw_spin_unlock+0x23/0x40 [ 29.051718][ C0] net_tx_action+0x402/0x660 [ 29.051864][ C0] handle_softirqs+0x1f9/0x5c0 [ 29.052002][ C0] ? dev_deactivate_many+0x1e2/0x8d0 [ 29.052143][ C0] do_softirq+0x4d/0xa0 [ 29.052247][ C0] [ 29.052346][ C0] [ 29.052425][ C0] __local_bh_enable_ip+0xf6/0x120 [ 29.052575][ C0] dev_deactivate_many+0x1e7/0x8d0 [ 29.052722][ C0] __dev_close_many+0x12b/0x2d0 [ 29.052879][ C0] ? __pfx___dev_close_many+0x10/0x10 [ 29.053027][ C0] dev_close_many+0x202/0x650 [ 29.053178][ C0] ? lock_acquire.part.0+0xeb/0x330 [ 29.053324][ C0] ? default_device_exit_batch+0x81/0x2d0 [ 29.053468][ C0] ? __pfx_dev_close_many+0x10/0x10 [ 29.053614][ C0] ? __mutex_trylock_common+0xfa/0x260 [ 29.053771][ C0] unregister_netdevice_many_notify+0x8e5/0x1570 [ 29.053954][ C0] ? lock_acquire+0x32/0xc0 [ 29.054098][ C0] ? trace_contention_end+0xeb/0x150 [ 29.054242][ C0] ? __mutex_lock+0x170/0xac0 [ 29.054398][ C0] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.054582][ C0] ? mark_lock+0x38/0x3e0 [ 29.054693][ C0] ? mutex_is_locked+0x17/0x50 [ 29.054839][ C0] ? rtnl_is_locked+0x15/0x20 [ 29.054991][ C0] ? unregister_netdevice_queue+0x70/0x410 [ 29.055250][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.055519][ C0] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.055707][ C0] default_device_exit_batch+0x234/0x2d0 [ 29.055858][ C0] ? __pfx_default_device_exit_batch+0x10/0x10 [ 29.056043][ C0] ? mutex_is_locked+0x17/0x50 [ 29.056193][ C0] ? nexthop_net_exit_batch_rtnl+0x83/0x210 [ 29.056515][ C0] cleanup_net+0x4ef/0x9d0 [ 29.056666][ C0] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.056831][ C0] ? __pfx_cleanup_net+0x10/0x10 [ 29.057061][ C0] ? trace_lock_acquire+0x14d/0x1f0 [ 29.057312][ C0] ? process_one_work+0xdf1/0x1670 [ 29.057463][ C0] ? lock_acquire+0x32/0xc0 [ 29.057612][ C0] ? process_one_work+0xdf1/0x1670 [ 29.057759][ C0] process_one_work+0xe3b/0x1670 [ 29.057908][ C0] ? __pfx___lock_release+0x10/0x10 [ 29.058053][ C0] ? __pfx_process_one_work+0x10/0x10 [ 29.058202][ C0] ? assign_work+0x16c/0x240 [ 29.058461][ C0] worker_thread+0x587/0xce0 [ 29.058621][ C0] ? __pfx_worker_thread+0x10/0x10 [ 29.058766][ C0] kthread+0x28a/0x350 [ 29.058863][ C0] ? __pfx_kthread+0x10/0x10 [ 29.059078][ C0] ret_from_fork+0x31/0x70 [ 29.059216][ C0] ? __pfx_kthread+0x10/0x10 [ 29.059357][ C0] ret_from_fork_asm+0x1a/0x30 [ 29.059517][ C0]