[    2.059651] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    2.059739] #PF: supervisor write access in kernel mode
[    2.059781] #PF: error_code(0x0002) - not-present page
[    2.059826] PGD 0 P4D 0 
[    2.059851] Oops: Oops: 0002 [#1] SMP
[    2.059885] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    2.059958] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.060016] Workqueue: netns cleanup_net
[    2.060058] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.060101] 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
[    2.060234] RSP: 0018:ffffae43c0067bb8 EFLAGS: 00010046
[    2.060276] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.060337] RDX: ffffae43c0067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.060397] RBP: ffffae43c0067bf0 R08: ffffffffbd693e00 R09: 0000000000000101
[    2.060457] R10: ffffffffbe2080d8 R11: ffffae43c0003ff8 R12: 0000000000000000
[    2.060519] R13: ffffae43c0067ce8 R14: 0000000000000020 R15: ffffae43c0067df0
[    2.060578] FS:  0000000000000000(0000) GS:ffff9c5c00191000(0000) knlGS:0000000000000000
[    2.060640] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.060693] CR2: 0000000000000000 CR3: 0000000005c1a001 CR4: 0000000000772ef0
[    2.060755] PKRU: 55555554
[    2.060788] Call Trace:
[    2.060815]  <TASK>
[    2.060840]  __cancel_work+0x29/0xe0
[    2.060873]  ? dev_deactivate_many+0x2c9/0x300
[    2.060919]  __cancel_work_sync+0x16/0x80
[    2.060954]  __dev_close_many+0x113/0x2b0
[    2.060999]  netif_close_many+0x98/0x160
[    2.061036]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    2.061079]  default_device_exit_batch+0x29b/0x300
[    2.061121]  ? mutex_lock+0x12/0x30
[    2.061161]  ops_undo_list+0xec/0x1f0
[    2.061195]  cleanup_net+0x1b7/0x300
[    2.061230]  process_one_work+0x162/0x380
[    2.061264]  worker_thread+0x299/0x3c0
[    2.061298]  ? rescuer_thread+0x4c0/0x4c0
[    2.061339]  kthread+0x101/0x1f0
[    2.061373]  ? kthreads_online_cpu+0x110/0x110
[    2.061415]  ? kthreads_online_cpu+0x110/0x110
[    2.061458]  ret_from_fork+0x11c/0x140
[    2.061497]  ? kthreads_online_cpu+0x110/0x110
[    2.061540]  ret_from_fork_asm+0x11/0x20
[    2.061576]  </TASK>
[    2.061600] Modules linked in:
[    2.061635] CR2: 0000000000000000
[    2.061670] ---[ end trace 0000000000000000 ]---
[    2.061712] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.061753] 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
[    2.061881] RSP: 0018:ffffae43c0067bb8 EFLAGS: 00010046
[    2.061918] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.061981] RDX: ffffae43c0067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.062043] RBP: ffffae43c0067bf0 R08: ffffffffbd693e00 R09: 0000000000000101
[    2.062104] R10: ffffffffbe2080d8 R11: ffffae43c0003ff8 R12: 0000000000000000
[    2.062158] R13: ffffae43c0067ce8 R14: 0000000000000020 R15: ffffae43c0067df0
[    2.062218] FS:  0000000000000000(0000) GS:ffff9c5c00191000(0000) knlGS:0000000000000000
[    2.062281] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.062337] CR2: 0000000000000000 CR3: 0000000005c1a001 CR4: 0000000000772ef0
[    2.062394] PKRU: 55555554
[    2.062418] note: kworker/u16:0[12] exited with irqs disabled

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