======================================
| # TEST: IPv4 over geneve4: PMTU exceptions                            [ OK ]
| [   42.354795] ------------[ cut here ]------------
| [   42.355160] WARNING: CPU: 2 PID: 67 at drivers/net/geneve.c:1914 geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
| [   42.355913] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[   42.357317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   42.358255] Workqueue: netns cleanup_net
[   42.358632] RIP: 0010:geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 42.359128] Code: 75 27 48 8b 83 a8 00 00 00 48 8d 98 58 ff ff ff 48 39 04 24 75 d1 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 <0f> 0b 90 eb d3 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90
All code
========
   0:	75 27                	jne    0x29
   2:	48 8b 83 a8 00 00 00 	mov    0xa8(%rbx),%rax
   9:	48 8d 98 58 ff ff ff 	lea    -0xa8(%rax),%rbx
  10:	48 39 04 24          	cmp    %rax,(%rsp)
  14:	75 d1                	jne    0xffffffffffffffe7
  16:	48 83 c4 08          	add    $0x8,%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 d3                	jmp    0x2
  2f:	0f 1f 40 00          	nopl   0x0(%rax)
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	eb d3                	jmp    0xffffffffffffffd8
   5:	0f 1f 40 00          	nopl   0x0(%rax)
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   42.361240] RSP: 0018:ffffb9f14025bdb0 EFLAGS: 00010202
[   42.361673] RAX: ffff9a1e8258b3b0 RBX: ffff9a1e82701700 RCX: 0000000000000000
[   42.362349] RDX: ffff9a1e828b4008 RSI: ffffffffbcf7b8c0 RDI: ffff9a1e821a8aa0
[   42.363010] RBP: ffff9a1e8258b3a0 R08: 0000000000000001 R09: 0000000000000001
[   42.363676] R10: 0000000000000004 R11: 0000000000000001 R12: ffffb9f14025be08
[   42.364285] R13: ffff9a1e82a8a000 R14: ffff9a1e8258b350 R15: ffff9a1e8258b350
[   42.364916] FS:  0000000000000000(0000) GS:ffff9a1ebed00000(0000) knlGS:0000000000000000
[   42.365573] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.366141] CR2: 00007fff3e488fd0 CR3: 0000000002660002 CR4: 0000000000770ef0
[   42.366762] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   42.367388] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   42.368035] PKRU: 55555554
[   42.368275] Call Trace:
[   42.368512]  <TASK>
[   42.368687] ? __warn (kernel/panic.c:677) 
[   42.369018] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[   42.369406] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[   42.369619] ? handle_bug (arch/x86/kernel/traps.c:238) 
[   42.369976] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[   42.370266] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   42.370598] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[   42.371136] cleanup_net (net/core/net_namespace.c:630) 
[   42.371445] ? process_one_work (kernel/workqueue.c:2606) 
[   42.371867] process_one_work (kernel/workqueue.c:2633) 
[   42.372306] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   42.372683] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   42.373125] kthread (kernel/kthread.c:388) 
[   42.373440] ? __pfx_kthread (kernel/kthread.c:341) 
[   42.373805] ret_from_fork (arch/x86/kernel/process.c:147) 
[   42.374134] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
geneve_exit_batch_rtnl:cleanup_net:process_one_work:worker_thread