[ 2.353761] ip (257) used greatest stack depth: 12136 bytes left [ 8.764066] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 8.764144] #PF: supervisor write access in kernel mode [ 8.764189] #PF: error_code(0x0002) - not-present page [ 8.764227] PGD 0 P4D 0 [ 8.764250] Oops: Oops: 0002 [#1] SMP [ 8.764282] CPU: 0 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 8.764349] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 8.764396] Workqueue: netns cleanup_net [ 8.764435] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 8.764481] 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 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41 [ 8.764617] RSP: 0018:ffffbca400267bb8 EFLAGS: 00010046 [ 8.764658] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000c00 [ 8.764714] RDX: ffffbca400267bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 8.764767] RBP: ffffbca400267bf0 R08: ffffa095813a4d83 R09: 0000000000000002 [ 8.764826] R10: ffffa095bec28640 R11: ffffa095813a4590 R12: 0000000000000000 [ 8.764884] R13: ffffbca400267ce8 R14: 0000000000000020 R15: ffffbca400267df0 [ 8.764944] FS: 0000000000000000(0000) GS:ffffa09600dd8000(0000) knlGS:0000000000000000 [ 8.765011] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8.765063] CR2: 0000000000000000 CR3: 00000000031e5001 CR4: 0000000000772ef0 [ 8.765120] PKRU: 55555554 [ 8.765144] Call Trace: [ 8.765168] [ 8.765192] __cancel_work+0x29/0xe0 [ 8.765229] ? queue_delayed_work_on+0x54/0x60 [ 8.765268] __cancel_work_sync+0x16/0x80 [ 8.765298] __dev_close_many+0x11b/0x280 [ 8.765331] netif_close_many+0x98/0x160 [ 8.765364] unregister_netdevice_many_notify+0x1d8/0xa50 [ 8.765405] ? unregister_netdevice_queue+0x29/0xe0 [ 8.765450] default_device_exit_batch+0x29b/0x300 [ 8.765494] ops_undo_list+0xec/0x1f0 [ 8.765530] cleanup_net+0x1b7/0x2b0 [ 8.765560] process_one_work+0x162/0x380 [ 8.765593] worker_thread+0x299/0x3c0 [ 8.765624] ? rescuer_thread+0x4c0/0x4c0 [ 8.765660] kthread+0x101/0x1f0 [ 8.765693] ? kthreads_online_cpu+0x110/0x110 [ 8.765732] ? kthreads_online_cpu+0x110/0x110 [ 8.765770] ret_from_fork+0x11c/0x140 [ 8.765811] ? kthreads_online_cpu+0x110/0x110 [ 8.765850] ret_from_fork_asm+0x11/0x20 [ 8.765888] [ 8.765909] Modules linked in: nft_ct nf_conntrack_netlink veth nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables [ 8.766017] CR2: 0000000000000000 [ 8.766056] ---[ end trace 0000000000000000 ]--- [ 8.766094] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 8.766133] 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 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41 [ 8.766257] RSP: 0018:ffffbca400267bb8 EFLAGS: 00010046 [ 8.766296] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000c00 [ 8.766353] RDX: ffffbca400267bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 8.766410] RBP: ffffbca400267bf0 R08: ffffa095813a4d83 R09: 0000000000000002 [ 8.766473] R10: ffffa095bec28640 R11: ffffa095813a4590 R12: 0000000000000000 [ 8.766535] R13: ffffbca400267ce8 R14: 0000000000000020 R15: ffffbca400267df0 [ 8.766587] FS: 0000000000000000(0000) GS:ffffa09600dd8000(0000) knlGS:0000000000000000 [ 8.766648] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8.766698] CR2: 0000000000000000 CR3: 00000000031e5001 CR4: 0000000000772ef0 [ 8.766761] PKRU: 55555554 [ 8.766783] note: kworker/u16:1[69] exited with irqs disabled