[ 2.858473] ip (332) used greatest stack depth: 12072 bytes left [ 3.225835] ip (371) used greatest stack depth: 11928 bytes left [ 30.661691] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 30.661796] #PF: supervisor write access in kernel mode [ 30.661839] #PF: error_code(0x0002) - not-present page [ 30.661872] PGD 0 P4D 0 [ 30.661896] Oops: Oops: 0002 [#1] SMP [ 30.661936] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) [ 30.662007] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.662053] Workqueue: netns cleanup_net [ 30.662089] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 30.662133] 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 [ 30.662255] RSP: 0018:ffffa37d40257bb8 EFLAGS: 00010046 [ 30.662305] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000800 [ 30.662361] RDX: ffffa37d40257bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 30.662409] RBP: ffffa37d40257bf0 R08: ffff8cb6813a4d83 R09: 0000000000000002 [ 30.662459] R10: ffff8cb6bec28640 R11: ffff8cb6813a4590 R12: 0000000000000000 [ 30.662511] R13: ffffa37d40257ce8 R14: 0000000000000020 R15: ffffa37d40257df0 [ 30.662563] FS: 0000000000000000(0000) GS:ffff8cb704bd8000(0000) knlGS:0000000000000000 [ 30.662618] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.662665] CR2: 0000000000000000 CR3: 0000000003b6a006 CR4: 0000000000772ef0 [ 30.662715] PKRU: 55555554 [ 30.662737] Call Trace: [ 30.662766] [ 30.662794] __cancel_work+0x29/0xe0 [ 30.662827] ? queue_delayed_work_on+0x54/0x60 [ 30.662865] __cancel_work_sync+0x16/0x80 [ 30.662895] __dev_close_many+0x11b/0x280 [ 30.662935] netif_close_many+0x98/0x160 [ 30.662964] ? rcu_barrier_entrain+0xb0/0xb0 [ 30.663011] unregister_netdevice_many_notify+0x1d8/0xa50 [ 30.663051] ? unregister_netdevice_queue+0x29/0xe0 [ 30.663090] default_device_exit_batch+0x29b/0x300 [ 30.663129] ops_undo_list+0xec/0x1f0 [ 30.663162] cleanup_net+0x1b7/0x2b0 [ 30.663186] process_one_work+0x162/0x380 [ 30.663215] worker_thread+0x299/0x3c0 [ 30.663246] ? rescuer_thread+0x4c0/0x4c0 [ 30.663286] kthread+0x101/0x1f0 [ 30.663319] ? kthreads_online_cpu+0x110/0x110 [ 30.663361] ? kthreads_online_cpu+0x110/0x110 [ 30.663398] ret_from_fork+0x11c/0x140 [ 30.663432] ? kthreads_online_cpu+0x110/0x110 [ 30.663470] ret_from_fork_asm+0x11/0x20 [ 30.663502] [ 30.663523] Modules linked in: tcp_diag inet_diag nft_masq nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables veth [ 30.663621] CR2: 0000000000000000 [ 30.663650] ---[ end trace 0000000000000000 ]--- [ 30.663684] RIP: 0010:work_grab_pending+0x2f/0x1b0 [ 30.663722] 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 [ 30.663845] RSP: 0018:ffffa37d40257bb8 EFLAGS: 00010046 [ 30.663888] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000800 [ 30.663949] RDX: ffffa37d40257bf0 RSI: 0000000000000000 RDI: 0000000000000000 [ 30.664002] RBP: ffffa37d40257bf0 R08: ffff8cb6813a4d83 R09: 0000000000000002 [ 30.664054] R10: ffff8cb6bec28640 R11: ffff8cb6813a4590 R12: 0000000000000000 [ 30.664103] R13: ffffa37d40257ce8 R14: 0000000000000020 R15: ffffa37d40257df0 [ 30.664152] FS: 0000000000000000(0000) GS:ffff8cb704bd8000(0000) knlGS:0000000000000000 [ 30.664206] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.664273] CR2: 0000000000000000 CR3: 0000000003b6a006 CR4: 0000000000772ef0 [ 30.664328] PKRU: 55555554 [ 30.664350] note: kworker/u16:1[67] exited with irqs disabled