======================================
|
| [   31.604679][    C0] ------------[ cut here ]------------
| [   31.605171][    C0] kernel BUG at net/core/skbuff.c:2813!
| [   31.605491][    C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[   31.606169][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.606663][    C0] Workqueue: events mptcp_worker
[ 31.606921][ C0] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.607219][ C0] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 8e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9
All code
========
   0:	e9 52 f7 ff ff       	jmp    0xfffffffffffff757
   5:	48 8b 7c 24 38       	mov    0x38(%rsp),%rdi
   a:	be 02 00 00 00       	mov    $0x2,%esi
   f:	e8 8e 9c ff ff       	call   0xffffffffffff9ca2
  14:	48 83 c4 58          	add    $0x58,%rsp
  18:	31 c0                	xor    %eax,%eax
  1a:	5b                   	pop    %rbx
  1b:	41 5c                	pop    %r12
  1d:	41 5d                	pop    %r13
  1f:	41 5e                	pop    %r14
  21:	41 5f                	pop    %r15
  23:	5d                   	pop    %rbp
  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:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
  33:	00 00 
  35:	e9 dc fa ff ff       	jmp    0xfffffffffffffb16
  3a:	84 c9                	test   %cl,%cl
  3c:	0f                   	.byte 0xf
  3d:	84 4b f9             	test   %cl,-0x7(%rbx)

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 44 24 38 00 00 	movq   $0x0,0x38(%rsp)
   9:	00 00 
   b:	e9 dc fa ff ff       	jmp    0xfffffffffffffaec
  10:	84 c9                	test   %cl,%cl
  12:	0f                   	.byte 0xf
  13:	84 4b f9             	test   %cl,-0x7(%rbx)
[   31.608075][    C0] RSP: 0018:ffffc900000078a8 EFLAGS: 00010282
[   31.608377][    C0] RAX: 00000000fffffff2 RBX: ffff88800643bcb4 RCX: 0000000000000004
[   31.608737][    C0] RDX: dffffc0000000000 RSI: 1ffff11000c29571 RDI: ffff88800614ab88
[   31.609103][    C0] RBP: ffffc90000007928 R08: 0000000000000014 R09: ffff88800643bcfc
[   31.609463][    C0] R10: ffff88800643bd00 R11: ffff88800643bd00 R12: ffff88800643bc40
[   31.609833][    C0] R13: 0000000000000100 R14: 0000000000000000 R15: 1ffff92000000f3f
[   31.610201][    C0] FS:  0000000000000000(0000) GS:ffff88802f800000(0000) knlGS:0000000000000000
[   31.610630][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   31.610956][    C0] CR2: 00007f7147656ec8 CR3: 0000000002de2001 CR4: 0000000000770ef0
[   31.611325][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   31.611685][    C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   31.612046][    C0] PKRU: 55555554
[   31.612235][    C0] Call Trace:
[   31.612416][    C0]  <IRQ>
[ 31.612539][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[ 31.612728][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[ 31.612924][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.613167][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[ 31.613406][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.613657][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.613899][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213) 
[ 31.614141][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.614388][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[ 31.614634][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 31.614872][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 31.615109][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813) 
[ 31.615351][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 31.615615][ C0] tcp_v4_rcv (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:2181) 
[ 31.615865][ C0] ? raw_v4_input (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/ipv4/raw.c:189) 
[ 31.616097][ C0] ? raw_v4_input (net/ipv4/raw.c:165) 
[ 31.616308][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 31.616533][ C0] ? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2163) 
[ 31.616763][ C0] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) 
[ 31.617001][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 31.617232][ C0] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8)) 
[ 31.617486][ C0] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) 
[ 31.617721][ C0] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) 
[ 31.618105][ C0] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) 
[ 31.618337][ C0] ? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2654 net/ipv4/ip_input.c:372) 
[ 31.618621][ C0] ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[ 31.618796][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 31.619026][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 31.619404][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 31.619621][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) 
[ 31.619829][ C0] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[ 31.620083][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) 
[ 31.620371][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 31.620575][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) 
[ 31.620806][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) 
[ 31.621036][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703) 
[ 31.621451][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) 
[ 31.621597][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850) 
[ 31.621740][ C0] ? hlock_class (kernel/locking/lockdep.c:223) 
[ 31.621885][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 31.622108][ C0] __do_softirq (kernel/softirq.c:553) 
[ 31.622254][ C0] ? mptcp_send_ack (./include/net/sock.h:1769 ./include/net/sock.h:1759 net/mptcp/protocol.c:517 net/mptcp/protocol.c:525) 
[ 31.622398][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   31.622526][    C0]  </IRQ>
[   31.622599][    C0]  <TASK>
[ 31.622756][ C0] __local_bh_enable_ip (kernel/softirq.c:381) 
[ 31.622961][ C0] mptcp_send_ack (./include/net/sock.h:1769 ./include/net/sock.h:1759 net/mptcp/protocol.c:517 net/mptcp/protocol.c:525) 
[ 31.623102][ C0] ? __pfx_mptcp_send_ack (net/mptcp/protocol.c:521) 
[ 31.623242][ C0] ? trace_inet_sock_set_state (./include/trace/events/sock.h:140 (discriminator 44)) 
[ 31.623509][ C0] mptcp_check_data_fin.isra.0 (net/mptcp/protocol.c:615) 
[ 31.623689][ C0] ? __pfx_mptcp_check_data_fin.isra.0 (net/mptcp/protocol.c:570) 
[ 31.623870][ C0] mptcp_worker (./include/linux/instrumented.h:96 ./include/asm-generic/bitops/instrumented-atomic.h:85 net/mptcp/protocol.c:2749) 
[ 31.624010][ C0] ? __pfx_mptcp_worker (net/mptcp/protocol.c:2730) 
[ 31.624233][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 31.624373][ C0] ? process_one_work (kernel/workqueue.c:2609) 
[ 31.624522][ C0] process_one_work (kernel/workqueue.c:2633) 
[ 31.624672][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 31.624923][ C0] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 31.625067][ C0] ? assign_work (kernel/workqueue.c:1101) 
[ 31.625206][ C0] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 31.625354][ C0] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 31.625504][ C0] kthread (kernel/kthread.c:388) 
[ 31.625613][ C0] ? __pfx_kthread (kernel/kthread.c:341) 
[ 31.625757][ C0] ret_from_fork (arch/x86/kernel/process.c:147) 
[ 31.625900][ C0] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
__pskb_pull_tail:tcp_v4_rcv:ip_protocol_deliver_rcu:ip_local_deliver_finish