[    2.640243] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    2.640312] #PF: supervisor write access in kernel mode
[    2.640354] #PF: error_code(0x0002) - not-present page
[    2.640387] PGD 0 P4D 0 
[    2.640410] Oops: Oops: 0002 [#1] SMP
[    2.640443] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    2.640503] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.640550] Workqueue: netns cleanup_net
[    2.640587] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.640631] 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
[    2.640747] RSP: 0018:ffffaf2380067bb8 EFLAGS: 00010046
[    2.640785] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 000000000010000a
[    2.640835] RDX: ffffaf2380067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.640889] RBP: ffffaf2380067bf0 R08: 0000000000000000 R09: ffffffff97156300
[    2.640944] R10: ffff9e5e44104000 R11: 0000000000000001 R12: 0000000000000000
[    2.640997] R13: ffffaf2380067ce8 R14: 0000000000000020 R15: ffffaf2380067df0
[    2.641045] FS:  0000000000000000(0000) GS:ffff9e5ee7591000(0000) knlGS:0000000000000000
[    2.641103] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.641147] CR2: 0000000000000000 CR3: 00000000031d0004 CR4: 0000000000772ef0
[    2.641204] PKRU: 55555554
[    2.641225] Call Trace:
[    2.641243]  <TASK>
[    2.641259]  __cancel_work+0x29/0xe0
[    2.641289]  __cancel_work_sync+0x16/0x80
[    2.641318]  __dev_close_many+0x113/0x2b0
[    2.641349]  netif_close_many+0x98/0x160
[    2.641380]  ? rcu_barrier_entrain+0xb0/0xb0
[    2.641420]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    2.641459]  ? unregister_netdevice_queue+0x29/0xe0
[    2.641496]  default_device_exit_batch+0x29b/0x300
[    2.641535]  ? mutex_lock+0x12/0x30
[    2.641571]  ops_undo_list+0xec/0x1f0
[    2.641602]  cleanup_net+0x1b7/0x300
[    2.641634]  process_one_work+0x162/0x380
[    2.641666]  worker_thread+0x299/0x3c0
[    2.641699]  ? rescuer_thread+0x4c0/0x4c0
[    2.641729]  kthread+0x101/0x1f0
[    2.641760]  ? kthreads_online_cpu+0x110/0x110
[    2.641797]  ? kthreads_online_cpu+0x110/0x110
[    2.641836]  ret_from_fork+0x11c/0x140
[    2.641869]  ? kthreads_online_cpu+0x110/0x110
[    2.641908]  ret_from_fork_asm+0x11/0x20
[    2.641940]  </TASK>
[    2.641960] Modules linked in:
[    2.641985] CR2: 0000000000000000
[    2.642018] ---[ end trace 0000000000000000 ]---
[    2.642057] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.642097] 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
[    2.642215] RSP: 0018:ffffaf2380067bb8 EFLAGS: 00010046
[    2.642253] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 000000000010000a
[    2.642306] RDX: ffffaf2380067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.642352] RBP: ffffaf2380067bf0 R08: 0000000000000000 R09: ffffffff97156300
[    2.642400] R10: ffff9e5e44104000 R11: 0000000000000001 R12: 0000000000000000
[    2.642449] R13: ffffaf2380067ce8 R14: 0000000000000020 R15: ffffaf2380067df0
[    2.642503] FS:  0000000000000000(0000) GS:ffff9e5ee7591000(0000) knlGS:0000000000000000
[    2.642556] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.642600] CR2: 0000000000000000 CR3: 00000000031d0004 CR4: 0000000000772ef0
[    2.642656] PKRU: 55555554
[    2.642678] note: kworker/u16:0[12] exited with irqs disabled

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