======================================
| [  764.245894][   T12] netdevsim netdevsim733 eni733np1: unset [0, 0] type 1 family 0 port 4789 - 0
| [  764.526434][   T12] netdevsim netdevsim733 eni733np1: set [0, 0] type 1 family 0 port 4789 - 0
| [  764.530282][ T6307] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
| [  764.530763][ T6307] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
[  764.531492][ T6307] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  764.531748][ T6307] Workqueue: mld mld_ifc_work
[ 764.531971][ T6307] RIP: 0010:xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3181) 
[ 764.532243][ T6307] Code: f1 f1 f1 c7 40 04 00 00 f2 f2 c7 40 08 00 00 f3 f3 65 48 8b 05 aa 13 e6 02 48 89 84 24 a8 00 00 00 31 c0 48 89 f8 48 c1 e8 03 <80> 3c 10 00 0f 85 cb 08 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b
All code
========
   0:	f1                   	int1
   1:	f1                   	int1
   2:	f1                   	int1
   3:	c7 40 04 00 00 f2 f2 	movl   $0xf2f20000,0x4(%rax)
   a:	c7 40 08 00 00 f3 f3 	movl   $0xf3f30000,0x8(%rax)
  11:	65 48 8b 05 aa 13 e6 	mov    %gs:0x2e613aa(%rip),%rax        # 0x2e613c3
  18:	02 
  19:	48 89 84 24 a8 00 00 	mov    %rax,0xa8(%rsp)
  20:	00 
  21:	31 c0                	xor    %eax,%eax
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
  2a:*	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1)		<-- trapping instruction
  2e:	0f 85 cb 08 00 00    	jne    0x8ff
  34:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  3b:	fc ff df 
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1)
   4:	0f 85 cb 08 00 00    	jne    0x8d5
   a:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  11:	fc ff df 
  14:	48                   	rex.W
  15:	8b                   	.byte 0x8b
[  764.532965][ T6307] RSP: 0018:ffffc90002b27230 EFLAGS: 00010202
[  764.533224][ T6307] RAX: 0000000000000001 RBX: 1ffff92000564e4c RCX: ffff88800f848040
[  764.533531][ T6307] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000008
[  764.533829][ T6307] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  764.534124][ T6307] R10: ffffc90002b27430 R11: ffffffffb6b796a0 R12: 0000000000000006
[  764.534430][ T6307] R13: ffff88800f848040 R14: ffffc90002b27430 R15: ffffffffb95cd9c0
[  764.534739][ T6307] FS:  0000000000000000(0000) GS:ffff88807db49000(0000) knlGS:0000000000000000
[  764.535085][ T6307] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  764.535367][ T6307] CR2: 0000560cfa255dec CR3: 000000001fb36005 CR4: 0000000000772ef0
[  764.535679][ T6307] PKRU: 55555554
[  764.535832][ T6307] Call Trace:
[  764.535985][ T6307]  <TASK>
[ 764.536090][ T6307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 764.536297][ T6307] ? __pfx_xfrm_lookup_with_ifid (net/xfrm/xfrm_policy.c:3177) 
[ 764.536555][ T6307] ? dst_release (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcuref.h:174 net/core/dst.c:167) 
[ 764.536754][ T6307] ? ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1231) 
[ 764.537068][ T6307] xfrm_lookup_route (net/xfrm/xfrm_policy.c:3351) 
[ 764.537303][ T6307] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1271) 
[ 764.537536][ T6307] ? __pfx_ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1271) 
[ 764.537735][ T6307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 764.537936][ T6307] ? __pfx_ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1271) 
[ 764.538133][ T6307] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) ip6_udp_tunnel 
[ 764.538385][ T6307] ? __pfx_udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:144) ip6_udp_tunnel 
[ 764.538678][ T6307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 764.538878][ T6307] ? lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 764.539076][ T6307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 764.539282][ T6307] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2537 (discriminator 4)) vxlan 
[ 764.539504][ T6307] ? vxlan_fdb_clear_offload (drivers/net/vxlan/vxlan_core.c:537 drivers/net/vxlan/vxlan_core.c:524) vxlan 
[ 764.539766][ T6307] ? __pfx_vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2330) vxlan 
[ 764.540022][ T6307] ? vxlan_find_mac_rcu (./include/linux/rhashtable.h:648 drivers/net/vxlan/vxlan_core.c:392) vxlan 
[ 764.540277][ T6307] ? __pfx_vxlan_find_mac_rcu (drivers/net/vxlan/vxlan_core.c:382) vxlan 
[ 764.540544][ T6307] ? vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2806) vxlan 
[ 764.540754][ T6307] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2806) vxlan 
[ 764.540968][ T6307] ? __pfx_vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2698) vxlan 
[ 764.541175][ T6307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 764.541373][ T6307] ? __pfx_skb_network_protocol (net/core/dev.c:3637) 
[ 764.541599][ T6307] dev_hard_start_xmit (./include/linux/netdevice.h:5219 ./include/linux/netdevice.h:5228 net/core/dev.c:3827 net/core/dev.c:3843) 
[ 764.541800][ T6307] __dev_queue_xmit (net/core/dev.h:370 net/core/dev.c:4714) 
[ 764.542000][ T6307] ? __pfx___dev_queue_xmit (net/core/dev.c:4621) 
[ 764.542197][ T6307] ? eth_header (net/ethernet/eth.c:100) 
[ 764.542400][ T6307] ? neigh_resolve_output (./include/linux/netdevice.h:3412 net/core/neighbour.c:1556 net/core/neighbour.c:1541) 
[ 764.542611][ T6307] ip6_finish_output2 (./include/net/neighbour.h:547 net/ipv6/ip6_output.c:141) 
[ 764.542809][ T6307] ip6_finish_output.constprop.0 (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
[ 764.543062][ T6307] ? icmp6_dst_alloc (net/ipv6/route.c:3344) 
[ 764.543260][ T6307] mld_sendpack (net/ipv6/mcast.c:1860) 
[ 764.543460][ T6307] ? __pfx_mld_sendpack (net/ipv6/mcast.c:1817) 
[ 764.543667][ T6307] ? mld_send_cr (net/ipv6/mcast.c:2132 (discriminator 11)) 
[ 764.543868][ T6307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 764.544065][ T6307] mld_ifc_work (net/ipv6/mcast.c:2696) 
[ 764.544262][ T6307] process_one_work (kernel/workqueue.c:3238) 
[ 764.544463][ T6307] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 764.544672][ T6307] ? assign_work (kernel/workqueue.c:1200) 
[ 764.544870][ T6307] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 764.545067][ T6307] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 764.545261][ T6307] kthread (kernel/kthread.c:464) 
[ 764.545415][ T6307] ? __pfx_kthread (kernel/kthread.c:413) 
[ 764.545618][ T6307] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 764.545816][ T6307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 764.546013][ T6307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 764.546209][ T6307] ? __pfx_kthread (kernel/kthread.c:413) 
[ 764.546406][ T6307] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 764.546610][ T6307] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
xfrm_lookup_with_ifid:xfrm_lookup_route:ip6_dst_lookup_flow:udp_tunnel6_dst_lookup:vxlan_xmit_one