------------[ cut here ]------------
WARNING: CPU: 2 PID: 0 at net/ipv4/tcp_input.c:889 tcp_update_reordering+0x224/0x280 net/ipv4/tcp_input.c:889
Kernel panic - not syncing: panic_on_warn set ...

CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.14.0-rc5-next-20171018+ #8
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1c4/0x1e0 kernel/panic.c:546
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:tcp_update_reordering+0x224/0x280 net/ipv4/tcp_input.c:889
RSP: 0018:ffff88006de063c0 EFLAGS: 00010206
RAX: ffff88006daaa040 RBX: ffff880054397500 RCX: ffffffff841955c4
RDX: 0000000000000100 RSI: 00000000fffffffd RDI: ffff880054397500
RBP: ffff88006de063d8 R08: 0000000000000001 R09: 0000000000000002
R10: ffff880054397e64 R11: 00000000247c3ab2 R12: 00000000fffffffd
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff880054397500
 tcp_sacktag_write_queue+0x1760/0x2240 net/ipv4/tcp_input.c:1862
 tcp_ack+0x281b/0x5100 net/ipv4/tcp_input.c:3640
 tcp_rcv_state_process+0xc19/0x4850 net/ipv4/tcp_input.c:5899
 tcp_v4_do_rcv+0x55c/0x7d0 net/ipv4/tcp_ipv4.c:1482
 tcp_v4_rcv+0x24e5/0x2f80 net/ipv4/tcp_ipv4.c:1721
 ip_local_deliver_finish+0x2e2/0xba0 net/ipv4/ip_input.c:216
 NF_HOOK include/linux/netfilter.h:249 [inline]
 ip_local_deliver+0x1ce/0x6e0 net/ipv4/ip_input.c:257
 dst_input include/net/dst.h:465 [inline]
 ip_rcv_finish+0x887/0x19a0 net/ipv4/ip_input.c:397
 NF_HOOK include/linux/netfilter.h:249 [inline]
 ip_rcv+0xc3f/0x1820 net/ipv4/ip_input.c:493
 __netif_receive_skb_core+0x1a3e/0x34b0 net/core/dev.c:4477
 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4515
 process_backlog+0x203/0x740 net/core/dev.c:5194
 napi_poll net/core/dev.c:5592 [inline]
 net_rx_action+0x792/0x1910 net/core/dev.c:5658
 __do_softirq+0x2d7/0xb85 kernel/softirq.c:284
 invoke_softirq kernel/softirq.c:364 [inline]
 irq_exit+0x1cc/0x200 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:540 [inline]
 smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:577
 </IRQ>
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
RSP: 0018:ffff88006dab7da8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11
RAX: dffffc0000000000 RBX: 1ffff1000db56fb8 RCX: 0000000000000000
RDX: 1ffffffff0b58f3c RSI: 0000000000000001 RDI: ffffffff85ac79e0
RBP: ffff88006dab7da8 R08: ffffffff81628a29 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85ac79d0
R13: ffff88006dab7e60 R14: 0000000000000000 R15: ffffffff85ac79c0
 arch_safe_halt arch/x86/include/asm/paravirt.h:93 [inline]
 default_idle+0xbf/0x430 arch/x86/kernel/process.c:341
 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:332
 default_idle_call+0x36/0x90 kernel/sched/idle.c:98
 cpuidle_idle_call kernel/sched/idle.c:156 [inline]
 do_idle+0x249/0x3a0 kernel/sched/idle.c:245
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:350
 start_secondary+0x2dd/0x3e0 arch/x86/kernel/smpboot.c:279
 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:238
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..