[    2.364907] veth0: renamed from veth-rt-1
[    2.473201] veth0: renamed from veth-rt-2
[    3.115803] ip (338) used greatest stack depth: 12072 bytes left
[   30.089037] BUG: kernel NULL pointer dereference, address: 0000000000000000
[   30.089112] #PF: supervisor write access in kernel mode
[   30.089150] #PF: error_code(0x0002) - not-present page
[   30.089187] PGD 0 P4D 0 
[   30.089209] Oops: Oops: 0002 [#1] SMP
[   30.089246] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[   30.089310] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   30.089354] Workqueue: netns cleanup_net
[   30.089395] RIP: 0010:work_grab_pending+0x2f/0x1b0
[   30.089439] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 <f0> 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41
[   30.089578] RSP: 0018:ffff98a2c0067b88 EFLAGS: 00010046
[   30.089616] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004
[   30.089670] RDX: ffff98a2c0067bc0 RSI: 0000000000000000 RDI: 0000000000000000
[   30.089724] RBP: ffff98a2c0067bc0 R08: ffff89650139cd73 R09: ffffffff93671c80
[   30.089778] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   30.089826] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000001
[   30.089876] FS:  0000000000000000(0000) GS:ffff8965aae11000(0000) knlGS:0000000000000000
[   30.089928] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.089976] CR2: 0000000000000000 CR3: 00000000031aa001 CR4: 0000000000772ef0
[   30.090024] PKRU: 55555554
[   30.090046] Call Trace:
[   30.090067]  <TASK>
[   30.090089]  __cancel_work+0x29/0xe0
[   30.090121]  ? linkwatch_urgent_event+0x2f/0xb0
[   30.090157]  __cancel_work_sync+0x16/0x80
[   30.090190]  __dev_close_many+0x113/0x2b0
[   30.090232]  __dev_change_flags+0xed/0x220
[   30.090264]  netif_change_flags+0x25/0x60
[   30.090297]  dev_change_flags+0x40/0xa0
[   30.090327]  cycle_netdev+0x36/0x70
[   30.090362]  vrf_dellink+0x5c/0xa0
[   30.090393]  default_device_exit_batch+0x246/0x300
[   30.090431]  ? mutex_lock+0x12/0x30
[   30.090477]  ops_undo_list+0xec/0x1f0
[   30.090505]  cleanup_net+0x1b7/0x300
[   30.090533]  process_one_work+0x162/0x380
[   30.090578]  worker_thread+0x299/0x3c0
[   30.090612]  ? rescuer_thread+0x4c0/0x4c0
[   30.090641]  kthread+0x101/0x1f0
[   30.090672]  ? kthreads_online_cpu+0x110/0x110
[   30.090711]  ? kthreads_online_cpu+0x110/0x110
[   30.090750]  ret_from_fork+0x11c/0x140
[   30.090787]  ? kthreads_online_cpu+0x110/0x110
[   30.090825]  ret_from_fork_asm+0x11/0x20
[   30.090861]  </TASK>
[   30.090884] Modules linked in:
[   30.090915] CR2: 0000000000000000
[   30.090944] ---[ end trace 0000000000000000 ]---
[   30.090981] RIP: 0010:work_grab_pending+0x2f/0x1b0
[   30.091020] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 <f0> 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41
[   30.091137] RSP: 0018:ffff98a2c0067b88 EFLAGS: 00010046
[   30.091176] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004
[   30.091222] RDX: ffff98a2c0067bc0 RSI: 0000000000000000 RDI: 0000000000000000
[   30.091269] RBP: ffff98a2c0067bc0 R08: ffff89650139cd73 R09: ffffffff93671c80
[   30.091315] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   30.091361] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000001
[   30.091420] FS:  0000000000000000(0000) GS:ffff8965aae11000(0000) knlGS:0000000000000000
[   30.091483] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.091527] CR2: 0000000000000000 CR3: 00000000031aa001 CR4: 0000000000772ef0
[   30.091589] PKRU: 55555554
[   30.091611] note: kworker/u16:0[12] exited with irqs disabled