[ 2.248915] ip (250) used greatest stack depth: 12136 bytes left [ 15.103602] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 15.103696] #PF: supervisor write access in kernel mode [ 15.103749] #PF: error_code(0x0002) - not-present page [ 15.103800] PGD 0 P4D 0 [ 15.103825] Oops: Oops: 0002 [#1] SMP [ 15.103865] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 15.103963] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.104029] Workqueue: netns cleanup_net [ 15.104075] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 15.104135] 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 [ 15.104316] RSP: 0018:ffffb82b80067bb8 EFLAGS: 00010046 [ 15.104367] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000800 [ 15.104443] RDX: ffffb82b80067bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 15.104519] RBP: ffffb82b80067bf0 R08: ffff93d481393683 R09: 0000000000000002 [ 15.104597] R10: ffff93d4bec28640 R11: ffff93d481392e90 R12: 0000000000000000 [ 15.104673] R13: ffffb82b80067ce8 R14: 0000000000000020 R15: ffffb82b80067df0 [ 15.104753] FS: 0000000000000000(0000) GS:ffff93d517fd8000(0000) knlGS:0000000000000000 [ 15.104837] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.104902] CR2: 0000000000000000 CR3: 0000000018641001 CR4: 0000000000772ef0 [ 15.104979] PKRU: 55555554 [ 15.105003] Call Trace: [ 15.105031] [ 15.105058] __cancel_work+0x29/0xe0 [ 15.105101] ? queue_delayed_work_on+0x54/0x60 [ 15.105152] __cancel_work_sync+0x16/0x80 [ 15.105192] __dev_close_many+0x11b/0x280 [ 15.105230] netif_close_many+0x98/0x160 [ 15.105269] unregister_netdevice_many_notify+0x1d8/0xa50 [ 15.105321] ? unregister_netdevice_queue+0x29/0xe0 [ 15.105373] default_device_exit_batch+0x29b/0x300 [ 15.105426] ops_undo_list+0xec/0x1f0 [ 15.105464] cleanup_net+0x1b7/0x2b0 [ 15.105502] process_one_work+0x162/0x380 [ 15.105539] worker_thread+0x299/0x3c0 [ 15.105577] ? rescuer_thread+0x4c0/0x4c0 [ 15.105615] kthread+0x101/0x1f0 [ 15.105654] ? kthreads_online_cpu+0x110/0x110 [ 15.105705] ? kthreads_online_cpu+0x110/0x110 [ 15.105756] ret_from_fork+0x11c/0x140 [ 15.105796] ? kthreads_online_cpu+0x110/0x110 [ 15.105847] ret_from_fork_asm+0x11/0x20 [ 15.105885] [ 15.105909] Modules linked in: nft_redir nft_chain_nat nf_nat nf_conntrack_netlink nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables veth [ 15.106048] CR2: 0000000000000000 [ 15.106085] ---[ end trace 0000000000000000 ]--- [ 15.106135] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 15.106187] 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 [ 15.106364] RSP: 0018:ffffb82b80067bb8 EFLAGS: 00010046 [ 15.106415] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000800 [ 15.106492] RDX: ffffb82b80067bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 15.106566] RBP: ffffb82b80067bf0 R08: ffff93d481393683 R09: 0000000000000002 [ 15.106642] R10: ffff93d4bec28640 R11: ffff93d481392e90 R12: 0000000000000000 [ 15.106719] R13: ffffb82b80067ce8 R14: 0000000000000020 R15: ffffb82b80067df0 [ 15.106797] FS: 0000000000000000(0000) GS:ffff93d517fd8000(0000) knlGS:0000000000000000 [ 15.106876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.106938] CR2: 0000000000000000 CR3: 0000000018641001 CR4: 0000000000772ef0 [ 15.107016] PKRU: 55555554 [ 15.107042] note: kworker/u16:0[12] exited with irqs disabled