======================================
| [    1.984377] ip (258) used greatest stack depth: 12344 bytes left
| [    4.972638] ------------[ cut here ]------------
| [    4.972691] kernel BUG at net/core/skbuff.c:2813!
| [    4.972733] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[    4.972819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[    4.972890] Workqueue: events mptcp_worker
[    4.972923] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 4.972962] 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)
[    4.973068] RSP: 0018:ffffbcea000e8dc8 EFLAGS: 00010282
[    4.973102] RAX: 00000000fffffff2 RBX: 0000000000000014 RCX: 0000000000000014
[    4.973152] RDX: ffff992e026d61fc RSI: 0000000000000100 RDI: 0000000000000000
[    4.973195] RBP: ffffbcea000e8e08 R08: 00000000ffffffd0 R09: 0000000000000008
[    4.973245] R10: ffff992e0194f0c8 R11: 0000000000000018 R12: ffff992e0194f000
[    4.973295] R13: 0000000000000014 R14: ffff992e02575900 R15: 0000000000000002
[    4.973339] FS:  0000000000000000(0000) GS:ffff992e3ec80000(0000) knlGS:0000000000000000
[    4.973388] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.973429] CR2: 00007f325689e520 CR3: 000000000196c002 CR4: 0000000000770ef0
[    4.973485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    4.973534] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    4.973584] PKRU: 55555554
[    4.973599] Call Trace:
[    4.973624]  <IRQ>
[    4.973646] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[    4.973678] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[    4.973707] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[    4.973735] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[    4.973763] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[    4.973792] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[    4.973821] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[    4.973849] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[    4.973879] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[    4.973908] ? __pskb_pull_tail (net/core/skbuff.c:2813) 
[    4.973936] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) 
[    4.973967] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1139 ./include/net/dst_metadata.h:94 net/ipv4/ip_input.c:364) 
[    4.974007] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[    4.974035] ? ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[    4.974070] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[    4.974109] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) 
[    4.974135] __napi_poll (net/core/dev.c:6703) 
[    4.974166] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) 
[    4.974193] __do_softirq (kernel/softirq.c:553) 
[    4.974223] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[    4.974255]  </IRQ>
[    4.974275]  <TASK>
[    4.974290] __local_bh_enable_ip (kernel/softirq.c:381) 
[    4.974319] __dev_queue_xmit (net/core/dev.c:4400) 
[    4.974348] ip_finish_output2 (./include/linux/netdevice.h:3172 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) 
[    4.974377] ? __ip_finish_output (./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[    4.974411] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[    4.974440] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[    4.974473] ? kmalloc_reserve (net/core/skbuff.c:584) 
[    4.974499] tcp_rcv_state_process (net/ipv4/tcp_input.c:6669) 
[    4.974535] ? tcp_v4_connect (net/ipv4/tcp_ipv4.c:324) 
[    4.974564] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) 
[    4.974592] __release_sock (./include/net/sock.h:1106 net/core/sock.c:2984) 
[    4.974621] release_sock (net/core/sock.c:3552) 
[    4.974653] inet_stream_connect (net/ipv4/af_inet.c:752) 
[    4.974682] kernel_connect (net/socket.c:3625) 
[    4.974714] ? mptcp_crypto_key_sha (net/mptcp/crypto.c:38) 
[    4.974753] __mptcp_subflow_connect (net/mptcp/subflow.c:1578) 
[    4.974791] mptcp_pm_create_subflow_or_signal_addr (net/mptcp/pm_netlink.c:600 (discriminator 3)) 
[    4.974838] ? finish_task_switch.isra.0 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/sched/sched.h:1397 kernel/sched/core.c:5154 kernel/sched/core.c:5272) 
[    4.974877] ? __schedule (kernel/sched/core.c:6733) 
[    4.974905] ? __lock_sock (net/core/sock.c:2966) 
[    4.974932] mptcp_pm_nl_work (net/mptcp/pm_netlink.c:874) 
[    4.974959] mptcp_worker (net/mptcp/protocol.c:2745) 
[    4.974987] process_one_work (kernel/workqueue.c:2633) 
[    4.975015] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    4.975049] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[    4.975077] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[    4.975112] kthread (kernel/kthread.c:388) 
[    4.975139] ? __pfx_kthread (kernel/kthread.c:341) 
[    4.975167] ret_from_fork (arch/x86/kernel/process.c:147) 
[    4.975196] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core