invalid inflight: 1 state 5 cwnd 10 mss 21888
------------[ cut here ]------------
WARNING: CPU: 0 PID: 20549 at net/ipv4/tcp_output.c:2507 tcp_send_loss_probe.cold+0x7e/0x94 net/ipv4/tcp_output.c:2507
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 20549 Comm: syz-executor.1 Not tainted 4.14.144+ #0
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 panic+0x1ea/0x3d3 kernel/panic.c:182
 __warn.cold+0x2f/0x3a kernel/panic.c:546
 report_bug+0x20a/0x248 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bf/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:tcp_send_loss_probe.cold+0x7e/0x94 net/ipv4/tcp_output.c:2507
RSP: 0018:ffff8881db807ca8 EFLAGS: 00010286
RAX: 000000000000002d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffffa3e69f80 RDI: ffffed103b700f87
RBP: ffff8881a42c8000 R08: 000000000000002d R09: ffffed103b704ce9
R10: ffffed103b704ce8 R11: ffff8881db826747 R12: 0000000000005580
R13: 0000000000000001 R14: 000000000000000a R15: ffff8881a42c8000
 tcp_write_timer_handler+0x46b/0x780 net/ipv4/tcp_timer.c:575
 tcp_write_timer+0xc9/0x170 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279
 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318
 __run_timers kernel/time/timer.c:1634 [inline]
 run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1647
 __do_softirq+0x234/0x9ec kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x114/0x150 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:preempt_latency_start kernel/sched/core.c:3149 [inline]
RIP: 0010:preempt_count_add+0xe2/0x180 kernel/sched/core.c:3172
RSP: 0018:ffff8881a4407d28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff11038c45225 RSI: 0000000000000004 RDI: ffff8881c6229128
RBP: ffff8881a4407d38 R08: 0000000000000001 R09: ffffed103ae1e017
R10: ffffed103ae1e016 R11: ffff8881d70f00b3 R12: ffff8881c6228000
R13: ffff8881b1529a60 R14: ffffffffa3efbe00 R15: ffff8881b1529be0
 __raw_spin_lock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:152
 spin_lock include/linux/spinlock.h:317 [inline]
 inode_sb_list_del fs/inode.c:447 [inline]
 evict+0x170/0x5f0 fs/inode.c:543
 iput_final fs/inode.c:1516 [inline]
 iput fs/inode.c:1543 [inline]
 iput+0x385/0x7f0 fs/inode.c:1528
 do_unlinkat+0x376/0x5e0 fs/namei.c:4234
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459637
RSP: 002b:00007ffc3665edd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000459637
RDX: 00007ffc3665edf0 RSI: 00007ffc3665edf0 RDI: 00007ffc3665ee80
RBP: 000000000000073f R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc3665ff10
R13: 0000000000f66940 R14: 0000000000000000 R15: 00007ffc3665ff10
Kernel Offset: 0x21000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..