======================================
| [   16.568559] pm_nl_ctl (745) used greatest stack depth: 12152 bytes left
| [   31.952369] ------------[ cut here ]------------
| [   31.952417] kernel BUG at net/core/skbuff.c:2813!
| [   31.952455] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[   31.952532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.952596] Workqueue: events mptcp_worker
[   31.952627] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.952661] Code: 44 24 10 e8 ed 38 83 ff 49 8b be c0 00 00 00 44 8b 44 24 10 41 8b 8e bc 00 00 00 e9 f4 fc ff ff 4c 8d 48 ff e9 41 fd ff ff 90 <0f> 0b 48 c7 44 24 10 00 00 00 00 e9 99 fe ff ff 41 f6 44 24 7e 20
All code
========
   0:	44 24 10             	rex.R and $0x10,%al
   3:	e8 ed 38 83 ff       	call   0xffffffffff8338f5
   8:	49 8b be c0 00 00 00 	mov    0xc0(%r14),%rdi
   f:	44 8b 44 24 10       	mov    0x10(%rsp),%r8d
  14:	41 8b 8e bc 00 00 00 	mov    0xbc(%r14),%ecx
  1b:	e9 f4 fc ff ff       	jmp    0xfffffffffffffd14
  20:	4c 8d 48 ff          	lea    -0x1(%rax),%r9
  24:	e9 41 fd ff ff       	jmp    0xfffffffffffffd6a
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 c7 44 24 10 00 00 	movq   $0x0,0x10(%rsp)
  33:	00 00 
  35:	e9 99 fe ff ff       	jmp    0xfffffffffffffed3
  3a:	41 f6 44 24 7e 20    	testb  $0x20,0x7e(%r12)

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 44 24 10 00 00 	movq   $0x0,0x10(%rsp)
   9:	00 00 
   b:	e9 99 fe ff ff       	jmp    0xfffffffffffffea9
  10:	41 f6 44 24 7e 20    	testb  $0x20,0x7e(%r12)
[   31.952758] RSP: 0018:ffffabaf80114dc8 EFLAGS: 00010282
[   31.952790] RAX: 00000000fffffff2 RBX: 0000000000000014 RCX: 0000000000000014
[   31.952835] RDX: ffff88aec27356c4 RSI: 0000000000000100 RDI: 0000000000000000
[   31.952880] RBP: ffffabaf80114e08 R08: 00000000ffffffd8 R09: 0000000000000008
[   31.952925] R10: ffff88aec40660c8 R11: 0000000000000020 R12: ffff88aec4066000
[   31.952969] R13: 0000000000000014 R14: ffff88aec2639700 R15: 0000000000000002
[   31.953010] FS:  0000000000000000(0000) GS:ffff88aefed00000(0000) knlGS:0000000000000000
[   31.953066] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.953104] CR2: 00007f05e2869000 CR3: 0000000031a44005 CR4: 0000000000770ef0
[   31.953164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.953207] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.953246] PKRU: 55555554
[   31.953259] Call Trace:
[   31.953276]  <IRQ>
[   31.953296] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[   31.953325] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[   31.953350] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   31.953376] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[   31.953401] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   31.953425] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[   31.953465] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   31.953487] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   31.953513] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   31.953551] ? __pskb_pull_tail (net/core/skbuff.c:2813) 
[   31.953576] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) 
[   31.953603] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1139 ./include/net/dst_metadata.h:94 net/ipv4/ip_input.c:364) 
[   31.953640] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[   31.953664] ? ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[   31.953696] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[   31.953729] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) 
[   31.953753] __napi_poll (net/core/dev.c:6703) 
[   31.953780] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) 
[   31.953804] __do_softirq (kernel/softirq.c:553) 
[   31.953835] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   31.953873]  </IRQ>
[   31.953891]  <TASK>
[   31.953904] __local_bh_enable_ip (kernel/softirq.c:381) 
[   31.953929] __dev_queue_xmit (net/core/dev.c:4400) 
[   31.953955] ? ip6_dst_check (net/ipv6/route.c:2770) 
[   31.953980] ? tcp_ack_update_rtt (./include/net/tcp.h:747 net/ipv4/tcp_input.c:990 net/ipv4/tcp_input.c:3169) 
[   31.954011] ? __slab_free (mm/slub.c:4148) 
[   31.954040] ip_finish_output2 (./include/linux/netdevice.h:3172 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[   31.954068] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[   31.954091] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[   31.954118] ? skb_release_data (net/core/skbuff.c:1153) 
[   31.954157] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[   31.954182] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[   31.954214] __tcp_close (net/ipv4/tcp.c:2842) 
[   31.954241] __mptcp_close_ssk (./arch/x86/include/asm/atomic.h:103 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:327 ./include/linux/refcount.h:348 ./include/net/sock.h:782 net/mptcp/protocol.c:2467) 
[   31.954266] ? lock_timer_base (kernel/time/timer.c:999) 
[   31.954293] mptcp_destroy_common (net/mptcp/protocol.c:3353) 
[   31.954327] mptcp_destroy (./include/net/sock.h:1480 net/mptcp/protocol.c:3380) 
[   31.954351] __mptcp_destroy_sock (net/mptcp/protocol.c:2999) 
[   31.954383] mptcp_worker (net/mptcp/protocol.c:2759) 
[   31.954408] process_one_work (kernel/workqueue.c:2633) 
[   31.954447] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   31.954477] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[   31.954503] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[   31.954534] kthread (kernel/kthread.c:388) 
[   31.954559] ? __pfx_kthread (kernel/kthread.c:341) 
[   31.954584] ret_from_fork (arch/x86/kernel/process.c:147) 
[   31.954610] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core