======================================
| [   78.831041][  T754] ------------[ cut here ]------------
| [   78.831251][  T754] DEBUG_LOCKS_WARN_ON(1)
| [   78.831273][  T754] WARNING: CPU: 0 PID: 754 at kernel/locking/lockdep.c:4976 lockdep_init_map_type (kernel/locking/lockdep.c:4976 (discriminator 7))
| [   78.831980][  T754] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel netdevsim [last unloaded: netdevsim]
[   78.832885][  T754] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   78.833147][  T754] RIP: 0010:lockdep_init_map_type (kernel/locking/lockdep.c:4976 (discriminator 7))
[   78.833415][  T754] Code: ff 4c 89 e6 48 c7 c7 70 82 de a8 e8 ee c9 01 00 e9 3d ff ff ff 90 48 c7 c6 b1 42 d8 a8 48 c7 c7 fe 3e d8 a8 e8 c5 89 e9 ff 90 <0f> 0b 90 90 e9 47 ff ff ff 90 48 c7 c6 ed 43 d8 a8 48 c7 c7 fe 3e
All code
========
   0:	ff 4c 89 e6          	decl   -0x1a(%rcx,%rcx,4)
   4:	48 c7 c7 70 82 de a8 	mov    $0xffffffffa8de8270,%rdi
   b:	e8 ee c9 01 00       	call   0x1c9fe
  10:	e9 3d ff ff ff       	jmp    0xffffffffffffff52
  15:	90                   	nop
  16:	48 c7 c6 b1 42 d8 a8 	mov    $0xffffffffa8d842b1,%rsi
  1d:	48 c7 c7 fe 3e d8 a8 	mov    $0xffffffffa8d83efe,%rdi
  24:	e8 c5 89 e9 ff       	call   0xffffffffffe989ee
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 47 ff ff ff       	jmp    0xffffffffffffff7a
  33:	90                   	nop
  34:	48 c7 c6 ed 43 d8 a8 	mov    $0xffffffffa8d843ed,%rsi
  3b:	48                   	rex.W
  3c:	c7                   	.byte 0xc7
  3d:	c7                   	(bad)
  3e:	fe                   	(bad)
  3f:	3e                   	ds

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 47 ff ff ff       	jmp    0xffffffffffffff50
   9:	90                   	nop
   a:	48 c7 c6 ed 43 d8 a8 	mov    $0xffffffffa8d843ed,%rsi
  11:	48                   	rex.W
  12:	c7                   	.byte 0xc7
  13:	c7                   	(bad)
  14:	fe                   	(bad)
  15:	3e                   	ds
[   78.834145][  T754] RSP: 0018:ffffc90000b87018 EFLAGS: 00010282
[   78.834400][  T754] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   78.834728][  T754] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[   78.835045][  T754] RBP: ffffe8ffffc03230 R08: 0000000000000000 R09: fffffbfff523e10c
[   78.835360][  T754] R10: 0000000000000003 R11: 0000000000000004 R12: ffff88800a5e2e60
[   78.835679][  T754] R13: 0000000000000000 R14: ffffe8ffffc03018 R15: ffffe8ffffc02fc0
[   78.835989][  T754] FS:  00007f212c281800(0000) GS:ffff88808bbfc000(0000) knlGS:0000000000000000
[   78.836320][  T754] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   78.836558][  T754] CR2: 00000000004e6e00 CR3: 0000000008a22002 CR4: 0000000000772ef0
[   78.836849][  T754] PKRU: 55555554
[   78.837004][  T754] Call Trace:
[   78.837144][  T754]  <TASK>
[   78.837238][  T754]  gro_cells_init (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-atomic.h:28 net/core/gro_cells.c:93 net/core/gro_cells.c:78)
[   78.837434][  T754] vxlan_init (drivers/net/vxlan/vxlan_core.c:2899) vxlan
[   78.837635][  T754]  ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:69 mm/kasan/common.c:78)
[   78.837851][  T754]  register_netdevice (net/core/dev.c:11309)
[   78.838064][  T754]  ? vxlan_vni_in_use (drivers/net/vxlan/vxlan_core.c:3680) vxlan
[   78.838273][  T754]  ? unregister_netdevice_queue (net/core/dev.c:11272)
[   78.838529][  T754]  ? vxlan_config_apply (drivers/net/vxlan/vxlan_core.c:3890) vxlan
[   78.838792][  T754] __vxlan_dev_create (drivers/net/vxlan/vxlan_core.c:3948) vxlan
[   78.839017][  T754]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   78.839222][  T754]  ? vxlan_changelink (drivers/net/vxlan/vxlan_core.c:3934) vxlan
[   78.839439][  T754] vxlan_newlink (drivers/net/vxlan/vxlan_core.c:4370) vxlan
[   78.839656][  T754]  ? vxlan_dev_create (drivers/net/vxlan/vxlan_core.c:4370) vxlan
[   78.839874][  T754]  ? rtnl_create_link (net/core/rtnetlink.c:3657)
[   78.840087][  T754]  rtnl_newlink_create (net/core/rtnetlink.c:3843)
[   78.840288][  T754]  ? rtnl_create_link (net/core/rtnetlink.c:3806)
[   78.840487][  T754]  ? __dev_get_by_name (net/core/dev.c:865)
[   78.840693][  T754]  ? rtnl_dev_get (net/core/rtnetlink.c:3419)
[   78.840912][  T754]  ? rtnl_validate_mdb_entry_del_bulk (net/core/rtnetlink.c:3419)
[   78.841169][  T754]  ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4071)
[   78.841366][  T754]  ? reacquire_held_locks (kernel/locking/lockdep.c:5385)
[   78.841568][  T754]  __rtnl_newlink (net/core/rtnetlink.c:3957)
[   78.841782][  T754]  rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4073)
[   78.841992][  T754]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   78.842196][  T754]  ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/core/rtnetlink.c:6956)
[   78.842396][  T754]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   78.842598][  T754]  ? __rtnl_newlink (net/core/rtnetlink.c:3963)
[   78.842818][  T754]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6958)
[   78.843029][  T754]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   78.843228][  T754]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.843449][  T754]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[   78.843654][  T754]  ? rtnl_port_fill (net/core/rtnetlink.c:6861)
[   78.843959][  T754]  ? netlink_ack (net/netlink/af_netlink.c:2527)
[   78.844169][  T754]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/netlink/af_netlink.c:340)
[   78.844375][  T754]  ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[   78.844604][  T754]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[   78.844818][  T754]  ? netlink_attachskb (net/netlink/af_netlink.c:1329)
[   78.845030][  T754]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.845235][  T754]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[   78.845445][  T754]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   78.845649][  T754]  ? __import_iovec (lib/iov_iter.c:1346 lib/iov_iter.c:1361)
[   78.845862][  T754]  ? netlink_unicast (net/netlink/af_netlink.c:1813)
[   78.846074][  T754]  ____sys_sendmsg (net/socket.c:727 net/socket.c:742 net/socket.c:2630)
[   78.846285][  T754]  ? get_timestamp.constprop.0 (net/socket.c:2576)
[   78.846542][  T754]  ? __copy_msghdr (net/socket.c:2556)
[   78.846764][  T754]  ___sys_sendmsg (net/socket.c:2686)
[   78.846978][  T754]  ? kasan_record_aux_stack (mm/kasan/generic.c:559)
[   78.847181][  T754]  ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3125)
[   78.847446][  T754]  ? copy_msghdr_from_user (net/socket.c:2673)
[   78.847650][  T754]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.847865][  T754]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   78.848083][  T754]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   78.848288][  T754]  ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 ./include/linux/mmzone.h:2197 arch/x86/mm/physaddr.c:65)
[   78.848502][  T754]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   78.848710][  T754]  __sys_sendmsg (net/socket.c:2716)
[   78.848944][  T754]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3148)
[   78.849198][  T754]  ? __sys_sendmsg_sock (net/socket.c:2701)
[   78.849419][  T754]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   78.849619][  T754]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   78.849835][  T754]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   78.850092][  T754] RIP: 0033:0x7f212c44f1d7
[   78.850306][  T754] Code: Unable to access opcode bytes at 0x7f212c44f1ad.

Code starting with the faulting instruction
===========================================
[   78.850573][  T754] RSP: 002b:00007ffdb36ec038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   78.850896][  T754] RAX: ffffffffffffffda RBX: 00007ffdb36ec760 RCX: 00007f212c44f1d7
[   78.851216][  T754] RDX: 0000000000000000 RSI: 00007ffdb36ec0a0 RDI: 0000000000000005
[   78.851526][  T754] RBP: 0000000000000008 R08: 0000000000000068 R09: 0000000000000000
[   78.851839][  T754] R10: 00007f212c4ddac0 R11: 0000000000000246 R12: 00007ffdb36ec778


Finger prints:
lockdep_init_map_type:gro_cells_init:vxlan_init:register_netdevice:__vxlan_dev_create