[ 1112.498739] dummy0: entered promiscuous mode
[ 1113.600441] BUG: kernel NULL pointer dereference, address: 0000000000000858
[ 1113.600495] #PF: supervisor read access in kernel mode
[ 1113.600523] #PF: error_code(0x0000) - not-present page
[ 1113.600553] PGD 0 
[ 1113.600568] Oops: Oops: 0000 [#1] SMP
[ 1113.600590] CPU: 2 UID: 0 PID: 64 Comm: kworker/u16:1 Not tainted 7.2.0-rc1-virtme #1 PREEMPT(lazy) 
[ 1113.600638] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1113.600672] Workqueue: netns cleanup_net
[ 1113.600697] RIP: 0010:macvlan_port_release_mac+0x23/0x220
[ 1113.600728] Code: 10 eb d9 0f 1f 40 00 0f 1f 44 00 00 48 81 ec 88 00 00 00 65 48 8b 05 4c a1 6b 01 48 89 84 24 80 00 00 00 48 8b 87 00 01 00 00 <f6> 80 58 08 00 00 01 74 24 48 8b 10 48 8b 92 58 04 00 00 8b 0a 0f
[ 1113.600822] RSP: 0018:ff85add50023fc20 EFLAGS: 00010282
[ 1113.600850] RAX: 0000000000000000 RBX: ff2dbd3187b90000 RCX: 0000000000000000
[ 1113.600890] RDX: 0000000000000000 RSI: ff2dbd3187b90818 RDI: ff2dbd3184442000
[ 1113.600930] RBP: ff2dbd3187b90818 R08: 000001031890adce R09: 000000000021f9ce
[ 1113.600970] R10: 0000000000000001 R11: 0000000000000001 R12: ff2dbd3184442000
[ 1113.601013] R13: ff2dbd31862f7100 R14: ff2dbd31819c5d00 R15: 0000000000000003
[ 1113.601057] FS:  0000000000000000(0000) GS:ff2dbd3204b37000(0000) knlGS:0000000000000000
[ 1113.601099] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1113.601133] CR2: 0000000000000858 CR3: 000000003a847006 CR4: 0000000000771ef0
[ 1113.601174] PKRU: 55555554
[ 1113.601188] Call Trace:
[ 1113.601201]  <TASK>
[ 1113.601215]  ? enable_work+0x3a/0x100
[ 1113.601239]  ? cancel_work_sync+0x62/0x70
[ 1113.601259]  macvlan_port_destroy+0xa1/0xb0
[ 1113.601282]  unregister_netdevice_many_notify+0x685/0xa30
[ 1113.601312]  default_device_exit_batch+0x328/0x3a0
[ 1113.601339]  ops_undo_list+0x10b/0x240
[ 1113.601360]  cleanup_net+0x1d7/0x330
[ 1113.601381]  process_one_work+0x162/0x340
[ 1113.601401]  worker_thread+0x16e/0x2d0
[ 1113.601422]  ? rescuer_thread+0x500/0x500
[ 1113.601442]  kthread+0xe1/0x120
[ 1113.601463]  ? kthread_park+0xa0/0xa0
[ 1113.601483]  ret_from_fork+0x16d/0x250
[ 1113.601505]  ? kthread_park+0xa0/0xa0
[ 1113.601525]  ret_from_fork_asm+0x11/0x20
[ 1113.601547]  </TASK>
[ 1113.601561] Modules linked in: ip6t_rpfilter xfrm_interface nft_chain_nat xt_nat act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router netdevsim psample pktgen act_ct nf_flow_table nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 cls_bpf xt_HL amt xt_bpf xt_length sctp_diag sctp geneve ip6_gre ip_gre gre ipvtap ipvlan act_mirred cls_u32 ifb act_gact cls_flower sch_ingress vxlan xfrm_user xt_policy ip6t_REJECT nf_reject_ipv6 nft_compat nf_tables
[ 1113.601763] CR2: 0000000000000858
[ 1113.601785] ---[ end trace 0000000000000000 ]---
[ 1113.601811] RIP: 0010:macvlan_port_release_mac+0x23/0x220
[ 1113.601838] Code: 10 eb d9 0f 1f 40 00 0f 1f 44 00 00 48 81 ec 88 00 00 00 65 48 8b 05 4c a1 6b 01 48 89 84 24 80 00 00 00 48 8b 87 00 01 00 00 <f6> 80 58 08 00 00 01 74 24 48 8b 10 48 8b 92 58 04 00 00 8b 0a 0f
[ 1113.601926] RSP: 0018:ff85add50023fc20 EFLAGS: 00010282
[ 1113.601953] RAX: 0000000000000000 RBX: ff2dbd3187b90000 RCX: 0000000000000000
[ 1113.601998] RDX: 0000000000000000 RSI: ff2dbd3187b90818 RDI: ff2dbd3184442000
[ 1113.602037] RBP: ff2dbd3187b90818 R08: 000001031890adce R09: 000000000021f9ce
[ 1113.602077] R10: 0000000000000001 R11: 0000000000000001 R12: ff2dbd3184442000
[ 1113.602119] R13: ff2dbd31862f7100 R14: ff2dbd31819c5d00 R15: 0000000000000003
[ 1113.602160] FS:  0000000000000000(0000) GS:ff2dbd3204b37000(0000) knlGS:0000000000000000
[ 1113.602204] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1113.602238] CR2: 0000000000000858 CR3: 000000003a847006 CR4: 0000000000771ef0
[ 1113.602278] PKRU: 55555554
[ 1113.602292] note: kworker/u16:1[64] exited with irqs disabled