[    2.346623] iptables (258) used greatest stack depth: 12488 bytes left
[    3.145494] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    3.145566] #PF: supervisor write access in kernel mode
[    3.145602] #PF: error_code(0x0002) - not-present page
[    3.145644] PGD 0 P4D 0 
[    3.145668] Oops: Oops: 0002 [#1] SMP
[    3.145701] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    3.145773] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.145837] Workqueue: netns cleanup_net
[    3.145883] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    3.145928] 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
[    3.146070] RSP: 0000:ffffb912c025fbb8 EFLAGS: 00010046
[    3.146118] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    3.146177] RDX: ffffb912c025fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    3.146231] RBP: ffffb912c025fbf0 R08: ffffffffa8c6d160 R09: 0000000000000101
[    3.146298] R10: ffffffffa94080d8 R11: ffffb912c0003ff8 R12: 0000000000000000
[    3.146363] R13: ffffb912c025fce8 R14: 0000000000000020 R15: ffffb912c025fdf0
[    3.146423] FS:  0000000000000000(0000) GS:ffff8dc254fd8000(0000) knlGS:0000000000000000
[    3.146484] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.146542] CR2: 0000000000000000 CR3: 0000000004cba003 CR4: 0000000000772ef0
[    3.146599] PKRU: 55555554
[    3.146627] Call Trace:
[    3.146646]  <TASK>
[    3.146671]  __cancel_work+0x29/0xe0
[    3.146705]  ? dev_deactivate_many+0x2c9/0x300
[    3.146751]  __cancel_work_sync+0x16/0x80
[    3.146789]  __dev_close_many+0x11b/0x280
[    3.146820]  netif_close_many+0x98/0x160
[    3.146852]  unregister_netdevice_many_notify+0x10c/0xa50
[    3.146894]  default_device_exit_batch+0x29b/0x300
[    3.146947]  ops_undo_list+0xec/0x1f0
[    3.146993]  cleanup_net+0x1b7/0x2b0
[    3.147034]  process_one_work+0x162/0x380
[    3.147072]  worker_thread+0x299/0x3c0
[    3.147102]  ? rescuer_thread+0x4c0/0x4c0
[    3.147136]  kthread+0x101/0x1f0
[    3.147173]  ? kthreads_online_cpu+0x110/0x110
[    3.147211]  ? kthreads_online_cpu+0x110/0x110
[    3.147253]  ret_from_fork+0x11c/0x140
[    3.147294]  ? kthreads_online_cpu+0x110/0x110
[    3.147342]  ret_from_fork_asm+0x11/0x20
[    3.147385]  </TASK>
[    3.147408] Modules linked in: ts_kmp ts_bm xt_string nft_compat nf_tables x_tables dummy
[    3.147469] CR2: 0000000000000000
[    3.147501] ---[ end trace 0000000000000000 ]---
[    3.147558] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    3.147602] 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
[    3.147741] RSP: 0000:ffffb912c025fbb8 EFLAGS: 00010046
[    3.147786] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    3.147846] RDX: ffffb912c025fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    3.147904] RBP: ffffb912c025fbf0 R08: ffffffffa8c6d160 R09: 0000000000000101
[    3.147975] R10: ffffffffa94080d8 R11: ffffb912c0003ff8 R12: 0000000000000000
[    3.148041] R13: ffffb912c025fce8 R14: 0000000000000020 R15: ffffb912c025fdf0
[    3.148102] FS:  0000000000000000(0000) GS:ffff8dc254fd8000(0000) knlGS:0000000000000000
[    3.148158] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.148207] CR2: 0000000000000000 CR3: 0000000004cba003 CR4: 0000000000772ef0
[    3.148266] PKRU: 55555554
[    3.148296] note: kworker/u16:1[68] exited with irqs disabled