[    2.046714] ip (261) used greatest stack depth: 12408 bytes left
[    2.130435] veth0: renamed from veth-rt-1
[    2.155861] ip (271) used greatest stack depth: 12136 bytes left
[    2.248691] veth0: renamed from veth-rt-2
[    3.561307] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    3.561388] #PF: supervisor write access in kernel mode
[    3.561428] #PF: error_code(0x0002) - not-present page
[    3.561468] PGD 0 P4D 0 
[    3.561494] Oops: Oops: 0002 [#1] SMP
[    3.561532] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    3.561598] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.561654] Workqueue: netns cleanup_net
[    3.561697] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    3.561744] 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
[    3.561878] RSP: 0018:ffffb7bdc0067bb8 EFLAGS: 00010046
[    3.561917] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004
[    3.561973] RDX: ffffb7bdc0067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    3.562029] RBP: ffffb7bdc0067bf0 R08: ffff9b8e413ab673 R09: 0000000000000002
[    3.562085] R10: ffff9b8e7ec28840 R11: ffff9b8e413aae90 R12: 0000000000000000
[    3.562140] R13: ffffb7bdc0067ce8 R14: 0000000000000020 R15: ffffb7bdc0067df0
[    3.562207] FS:  0000000000000000(0000) GS:ffff9b8ecf391000(0000) knlGS:0000000000000000
[    3.562269] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.562325] CR2: 0000000000000000 CR3: 000000000404d005 CR4: 0000000000772ef0
[    3.562382] PKRU: 55555554
[    3.562413] Call Trace:
[    3.562450]  <TASK>
[    3.562480]  __cancel_work+0x29/0xe0
[    3.562513]  ? queue_delayed_work_on+0x54/0x60
[    3.562558]  __cancel_work_sync+0x16/0x80
[    3.562587]  __dev_close_many+0x113/0x2b0
[    3.562618]  netif_close_many+0x98/0x160
[    3.562664]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    3.562706]  ? unregister_netdevice_queue+0x29/0xe0
[    3.562739]  default_device_exit_batch+0x29b/0x300
[    3.562774]  ? mutex_lock+0x12/0x30
[    3.562814]  ops_undo_list+0xec/0x1f0
[    3.562847]  cleanup_net+0x1b7/0x300
[    3.562878]  process_one_work+0x162/0x380
[    3.562909]  worker_thread+0x299/0x3c0
[    3.562939]  ? rescuer_thread+0x4c0/0x4c0
[    3.562971]  kthread+0x101/0x1f0
[    3.563006]  ? kthreads_online_cpu+0x110/0x110
[    3.563044]  ? kthreads_online_cpu+0x110/0x110
[    3.563086]  ret_from_fork+0x11c/0x140
[    3.563124]  ? kthreads_online_cpu+0x110/0x110
[    3.563172]  ret_from_fork_asm+0x11/0x20
[    3.563216]  </TASK>
[    3.563240] Modules linked in: ipt_rpfilter nft_compat nf_tables
[    3.563302] CR2: 0000000000000000
[    3.563342] ---[ end trace 0000000000000000 ]---
[    3.563381] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    3.563423] 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
[    3.563553] RSP: 0018:ffffb7bdc0067bb8 EFLAGS: 00010046
[    3.563593] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004
[    3.563659] RDX: ffffb7bdc0067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    3.563723] RBP: ffffb7bdc0067bf0 R08: ffff9b8e413ab673 R09: 0000000000000002
[    3.563785] R10: ffff9b8e7ec28840 R11: ffff9b8e413aae90 R12: 0000000000000000
[    3.563844] R13: ffffb7bdc0067ce8 R14: 0000000000000020 R15: ffffb7bdc0067df0
[    3.563906] FS:  0000000000000000(0000) GS:ffff9b8ecf391000(0000) knlGS:0000000000000000
[    3.563965] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.564011] CR2: 0000000000000000 CR3: 000000000404d005 CR4: 0000000000772ef0
[    3.564069] PKRU: 55555554
[    3.564089] note: kworker/u16:0[12] exited with irqs disabled