======================================
| [  446.957801] #PF: supervisor read access in kernel mode
| [  446.957844] #PF: error_code(0x0000) - not-present page
| [  446.957885] PGD 0 P4D 0
| [  446.957909] Oops: Oops: 0000 [#1] SMP NOPTI
[  446.958009] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  446.958060] Workqueue: mld mld_ifc_work
[  446.958099] RIP: 0010:xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3181) 
[ 446.958144] Code: 41 57 45 89 cf 41 56 41 55 49 89 d5 41 54 49 89 fc 55 48 89 f5 53 44 89 c3 48 83 ec 40 65 48 8b 05 ca c4 54 01 48 89 44 24 38 <48> 8b 46 08 44 0f b7 30 48 85 c9 0f 84 f3 00 00 00 0f b6 41 12 48
All code
========
   0:	41 57                	push   %r15
   2:	45 89 cf             	mov    %r9d,%r15d
   5:	41 56                	push   %r14
   7:	41 55                	push   %r13
   9:	49 89 d5             	mov    %rdx,%r13
   c:	41 54                	push   %r12
   e:	49 89 fc             	mov    %rdi,%r12
  11:	55                   	push   %rbp
  12:	48 89 f5             	mov    %rsi,%rbp
  15:	53                   	push   %rbx
  16:	44 89 c3             	mov    %r8d,%ebx
  19:	48 83 ec 40          	sub    $0x40,%rsp
  1d:	65 48 8b 05 ca c4 54 	mov    %gs:0x154c4ca(%rip),%rax        # 0x154c4ef
  24:	01 
  25:	48 89 44 24 38       	mov    %rax,0x38(%rsp)
  2a:*	48 8b 46 08          	mov    0x8(%rsi),%rax		<-- trapping instruction
  2e:	44 0f b7 30          	movzwl (%rax),%r14d
  32:	48 85 c9             	test   %rcx,%rcx
  35:	0f 84 f3 00 00 00    	je     0x12e
  3b:	0f b6 41 12          	movzbl 0x12(%rcx),%eax
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 8b 46 08          	mov    0x8(%rsi),%rax
   4:	44 0f b7 30          	movzwl (%rax),%r14d
   8:	48 85 c9             	test   %rcx,%rcx
   b:	0f 84 f3 00 00 00    	je     0x104
  11:	0f b6 41 12          	movzbl 0x12(%rcx),%eax
  15:	48                   	rex.W
[  446.958273] RSP: 0018:ffffb9c180437808 EFLAGS: 00010282
[  446.958313] RAX: d0dc839d2e120100 RBX: 0000000000000006 RCX: ffff9cfe4105f8c0
[  446.958369] RDX: ffffb9c1804378d0 RSI: 0000000000000000 RDI: ffffffffa9f51300
[  446.958422] RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000000
[  446.958474] R10: 0000000000000040 R11: ffffffffa87f2e4c R12: ffffffffa9f51300
[  446.958534] R13: ffffb9c1804378d0 R14: 0000000000000000 R15: 0000000000000000
[  446.958606] FS:  0000000000000000(0000) GS:ffff9cfed4d9c000(0000) knlGS:0000000000000000
[  446.958666] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  446.958716] CR2: 0000000000000008 CR3: 000000002c042001 CR4: 0000000000772ef0
[  446.958773] PKRU: 55555554
[  446.958796] Call Trace:
[  446.958816]  <TASK>
[  446.958842] ? ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1231) 
[  446.958891] xfrm_lookup_route (net/xfrm/xfrm_policy.c:3351) 
[  446.958931] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:167 net/ipv6/ip6_udp_tunnel.c:135) ip6_udp_tunnel 
[  446.958983] ? __ip_finish_output (./include/linux/skbuff.h:5071 net/ipv4/ip_output.c:307) 
[  446.959029] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2537) vxlan 
[  446.959075] ? vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2806) vxlan 
[  446.959115] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2806) vxlan 
[  446.959158] ? __set_next_task_fair.part.0 (kernel/sched/fair.c:13302) 
[  446.959206] ? sched_balance_find_src_group (kernel/sched/fair.c:10395 kernel/sched/fair.c:11062 kernel/sched/fair.c:11321) 
[  446.959250] ? ___neigh_create (./include/linux/slab.h:909 ./include/linux/slab.h:1039 net/core/neighbour.c:488 net/core/neighbour.c:622) 
[  446.959285] ? dev_hard_start_xmit (./include/linux/netdevice.h:5219 ./include/linux/netdevice.h:5228 net/core/dev.c:3827 net/core/dev.c:3843) 
[  446.959326] dev_hard_start_xmit (./include/linux/netdevice.h:5219 ./include/linux/netdevice.h:5228 net/core/dev.c:3827 net/core/dev.c:3843) 
[  446.959361] __dev_queue_xmit (net/core/dev.h:370 net/core/dev.c:4714) 
[  446.959393] ? ndisc_constructor (net/ipv6/ndisc.c:360) 
[  446.959433] ? ___neigh_create (net/core/neighbour.c:703) 
[  446.959466] ? eth_header (net/ethernet/eth.c:85) 
[  446.959539] ip6_finish_output2 (./include/net/neighbour.h:547 net/ipv6/ip6_output.c:141) 
[  446.959576] ip6_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226 ./include/linux/netfilter.h:413 net/ipv6/ip6_output.c:248) 
[  446.959609] mld_sendpack (net/ipv6/mcast.c:1860) 
[  446.959645] mld_ifc_work (net/ipv6/mcast.c:2696) 
[  446.959676] ? __schedule (kernel/sched/core.c:6792) 
[  446.959709] process_one_work (kernel/workqueue.c:3243) 
[  446.959745] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[  446.959778] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[  446.959818] kthread (kernel/kthread.c:464) 
[  446.959850] ? __pfx_kthread (kernel/kthread.c:413) 
[  446.959883] ? __pfx_kthread (kernel/kthread.c:413) 
[  446.959910] ret_from_fork (arch/x86/kernel/process.c:154) 
[  446.959946] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
xfrm_lookup_with_ifid:xfrm_lookup_route:udp_tunnel6_dst_lookup:vxlan_xmit_one:vxlan_xmit