[ 4845.118693] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 4845.119031] rcu: 	3-....: (4545903 ticks this GP) idle=0ad4/1/0x4000000000000000 softirq=90643/90646 fqs=1116369
[ 4845.119558] rcu: 	(t=4551094 jiffies g=163465 q=169 ncpus=4)
[ 4845.119855] CPU: 3 PID: 11 Comm: kworker/u8:0 Tainted: G        W          6.8.0-rc2-virtme #1
[ 4845.120294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 4845.120875] Workqueue: netns cleanup_net
[ 4845.121085] RIP: 0010:queued_spin_lock_slowpath+0x36/0x310
[ 4845.121373] Code: 54 55 48 89 fd 53 66 90 ba 01 00 00 00 8b 45 00 85 c0 75 14 f0 0f b1 55 00 85 c0 75 f0 5b 5d 41 5c 41 5d c3 cc cc cc cc f3 90 <eb> e1 81 fe 00 01 00 00 74 52 40 30 f6 85 f6 75 75 f0 0f ba 6d 00
[ 4845.122310] RSP: 0018:ffffad8700063a78 EFLAGS: 00000286
[ 4845.122584] RAX: 000000008602de00 RBX: ffff9b89848e1a08 RCX: 0000000000000000
[ 4845.122948] RDX: 0000000000000001 RSI: 000000008602de00 RDI: ffff9b89848e1a08
[ 4845.123315] RBP: ffff9b89848e1a08 R08: 0000000000000001 R09: 0000000000000000
[ 4845.123680] R10: 0000000000000000 R11: ffffffffa65507e8 R12: ffff9b89848e1a00
[ 4845.124048] R13: 0000000000000000 R14: ffff9b89848e1a08 R15: ffff9b89848e1a68
[ 4845.124414] FS:  0000000000000000(0000) GS:ffff9b89bed80000(0000) knlGS:0000000000000000
[ 4845.124829] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4845.125126] CR2: 00007f4acc4c3000 CR3: 000000001c860003 CR4: 0000000000770ef0
[ 4845.125489] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4845.125856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4845.126222] PKRU: 55555554
[ 4845.126366] Call Trace:
[ 4845.126498]  <IRQ>
[ 4845.126612]  ? rcu_dump_cpu_stacks+0xfa/0x180
[ 4845.126847]  ? rcu_sched_clock_irq+0x7bb/0x13d0
[ 4845.127086]  ? _raw_spin_unlock_irqrestore+0x27/0x50
[ 4845.127346]  ? timekeeping_advance+0x3b4/0x5d0
[ 4845.127581]  ? cpuacct_account_field+0x23/0xf0
[ 4845.127818]  ? update_process_times+0x5f/0x90
[ 4845.128047]  ? __pfx_tick_nohz_highres_handler+0x10/0x10
[ 4845.128329]  ? tick_sched_handle+0x33/0x50
[ 4845.128542]  ? tick_nohz_highres_handler+0x71/0x90
[ 4845.128794]  ? __hrtimer_run_queues+0x86/0x390
[ 4845.129029]  ? hrtimer_interrupt+0x100/0x240
[ 4845.129259]  ? __sysvec_apic_timer_interrupt+0x66/0x1a0
[ 4845.129533]  ? sysvec_apic_timer_interrupt+0x73/0x90
[ 4845.129794]  </IRQ>
[ 4845.129910]  <TASK>
[ 4845.130025]  ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 4845.130303]  ? queued_spin_lock_slowpath+0x36/0x310
[ 4845.130558]  do_raw_spin_lock+0x9b/0xa0
[ 4845.130762]  __mutex_lock+0x205/0x7a0
[ 4845.130958]  ? refcount_dec_and_mutex_lock+0x35/0x80
[ 4845.131218]  ? up_read+0x1b/0x30
[ 4845.131393]  ? tc_setup_cb_destroy+0x116/0x180
[ 4845.131629]  ? refcount_dec_and_mutex_lock+0x35/0x80
[ 4845.131889]  refcount_dec_and_mutex_lock+0x35/0x80
[ 4845.132140]  __tcf_action_put+0x1e/0x70
[ 4845.132345]  tcf_action_destroy+0x31/0x80
[ 4845.132555]  tcf_exts_destroy+0x20/0x40
[ 4845.132757]  __fl_destroy_filter+0x1e/0x80 [cls_flower]
[ 4845.133032]  __fl_delete+0x12d/0x180 [cls_flower]
[ 4845.133281]  fl_destroy+0xbd/0x140 [cls_flower]
[ 4845.133522]  tcf_proto_destroy+0x1f/0xc0
[ 4845.133729]  tcf_chain_flush+0xab/0x170
[ 4845.133933]  __tcf_block_put+0xd2/0x190
[ 4845.134138]  clsact_destroy+0xa0/0x380 [sch_ingress]
[ 4845.134398]  __qdisc_destroy+0x51/0x150
[ 4845.134602]  dev_shutdown+0x78/0x190
[ 4845.134792]  unregister_netdevice_many_notify+0x23e/0x7f0
[ 4845.135071]  cleanup_net+0x268/0x400
[ 4845.135262]  ? process_one_work+0x16c/0x4b0
[ 4845.135485]  process_one_work+0x1d6/0x4b0
[ 4845.135699]  worker_thread+0x1c1/0x3d0
[ 4845.135898]  ? __pfx_worker_thread+0x10/0x10
[ 4845.136127]  kthread+0xda/0x110
[ 4845.136296]  ? __pfx_kthread+0x10/0x10
[ 4845.136495]  ret_from_fork+0x31/0x50
[ 4845.136687]  ? __pfx_kthread+0x10/0x10
[ 4845.136886]  ret_from_fork_asm+0x1b/0x30
[ 4845.137094]  </TASK>
exit