======================================
| # │ geneve │     4 │     4 │ inherit 0xd0 │  inherit 146 │ false │     OK │
| [  180.753322][   T11] ------------[ cut here ]------------
| [ 180.753721][ T11] WARNING: CPU: 3 PID: 11 at drivers/net/geneve.c:1914 geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
| [  180.754327][   T11] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel ip6_gre ip_gre gre
[  180.755342][   T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  180.756037][   T11] Workqueue: netns cleanup_net
[ 180.756337][ T11] RIP: 0010:geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 180.756754][ T11] Code: 00 48 8b 83 b8 00 00 00 48 8d 98 48 ff ff ff 48 39 44 24 10 75 a5 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 <0f> 0b 90 eb b9 e8 d2 9d 77 de e9 2d fe ff ff 48 89 cf 48 89 4c 24
All code
========
   0:	00 48 8b             	add    %cl,-0x75(%rax)
   3:	83 b8 00 00 00 48 8d 	cmpl   $0xffffff8d,0x48000000(%rax)
   a:	98                   	cwtl
   b:	48 ff                	rex.W (bad)
   d:	ff                   	(bad)
   e:	ff 48 39             	decl   0x39(%rax)
  11:	44 24 10             	rex.R and $0x10,%al
  14:	75 a5                	jne    0xffffffffffffffbb
  16:	48 83 c4 20          	add    $0x20,%rsp
  1a:	5b                   	pop    %rbx
  1b:	5d                   	pop    %rbp
  1c:	41 5c                	pop    %r12
  1e:	41 5d                	pop    %r13
  20:	41 5e                	pop    %r14
  22:	41 5f                	pop    %r15
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	eb b9                	jmp    0xffffffffffffffe8
  2f:	e8 d2 9d 77 de       	call   0xffffffffde779e06
  34:	e9 2d fe ff ff       	jmp    0xfffffffffffffe66
  39:	48 89 cf             	mov    %rcx,%rdi
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	4c                   	rex.WR
  3f:	24                   	.byte 0x24

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	eb b9                	jmp    0xffffffffffffffbe
   5:	e8 d2 9d 77 de       	call   0xffffffffde779ddc
   a:	e9 2d fe ff ff       	jmp    0xfffffffffffffe3c
   f:	48 89 cf             	mov    %rcx,%rdi
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	4c                   	rex.WR
  15:	24                   	.byte 0x24
[  180.757779][   T11] RSP: 0018:ffffc900000bfbe0 EFLAGS: 00010297
[  180.758102][   T11] RAX: ffff888029bd4008 RBX: ffff88800678cd80 RCX: 1ffff1100038091e
[  180.758536][   T11] RDX: 1ffff110005db066 RSI: 1ffff11006bc54be RDI: ffff888001c048f0
[  180.758954][   T11] RBP: ffff888002ed8330 R08: ffff888001c048f8 R09: fffffbfff486a078
[  180.759386][   T11] R10: ffffffffa43503c7 R11: ffff888035ffc508 R12: dffffc0000000000
[  180.759816][   T11] R13: fffffbfff444f027 R14: ffffffffa2965698 R15: ffff888002ed82d0
[  180.760264][   T11] FS:  0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000
[  180.760780][   T11] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  180.761146][   T11] CR2: 00007f55847530e0 CR3: 0000000003f02002 CR4: 00000000001706f0
[  180.761616][   T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  180.762062][   T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  180.762517][   T11] Call Trace:
[  180.762717][   T11]  <TASK>
[ 180.762883][ T11] ? __warn (kernel/panic.c:677) 
[ 180.763119][ T11] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 180.763516][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 180.763788][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 180.764022][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 180.764286][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 180.764569][ T11] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 180.764913][ T11] ? default_device_exit_batch_rtnl (net/core/dev.c:11626) 
[ 180.765262][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 180.765507][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 180.765808][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 180.766094][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 180.766366][ T11] ? process_one_work (kernel/workqueue.c:2609) 
[ 180.766666][ T11] process_one_work (kernel/workqueue.c:2638) 
[ 180.766940][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 180.767187][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 180.767502][ T11] ? assign_work (kernel/workqueue.c:1101) 
[ 180.767760][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 180.768029][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 180.768313][ T11] kthread (kernel/kthread.c:388) 
[ 180.768536][ T11] ? __pfx_kthread (kernel/kthread.c:341) 
[ 180.768784][ T11] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 180.769027][ T11] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
geneve_exit_batch_rtnl:cleanup_net:process_one_work:worker_thread