invalid inflight: 1 state 4 cwnd 10 mss 1428
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9573 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: 9573 Comm: syz-executor.1 Not tainted 4.14.143+ #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:ffff8881dba07ca8 EFLAGS: 00010286
RAX: 000000000000002c RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffffb0469f80 RDI: ffffed103b740f87
RBP: ffff88818da38000 R08: 000000000000002c R09: ffffed103b744ce9
R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: 0000000000000594
R13: 0000000000000001 R14: 000000000000000a R15: ffff88818da38000
 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:debug_lockdep_rcu_enabled.part.0+0x26/0x50 kernel/rcu/update.c:300
RSP: 0018:ffff88818da776a8 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8881aad90000 RCX: 1ffffffff6182a28
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881aad9082c
RBP: ffffea0006a956c0 R08: 0000000000000000 R09: 0000000000000001
R10: ffff8881aad90858 R11: d3c0ca05fa3dc1f6 R12: ffffea0006a956c0
R13: ffffea0006a956e0 R14: dead000000000100 R15: ffff888199e520a8
 rcu_read_lock include/linux/rcupdate.h:630 [inline]
 lock_page_memcg+0x3b/0x290 mm/memcontrol.c:1669
 page_remove_file_rmap mm/rmap.c:1211 [inline]
 page_remove_rmap+0x160/0x4c0 mm/rmap.c:1296
 zap_pte_range mm/memory.c:1342 [inline]
 zap_pmd_range mm/memory.c:1444 [inline]
 zap_pud_range mm/memory.c:1473 [inline]
 zap_p4d_range mm/memory.c:1494 [inline]
 unmap_page_range+0xa26/0x1320 mm/memory.c:1515
 unmap_single_vma+0x118/0x170 mm/memory.c:1560
 unmap_vmas+0x43/0xa0 mm/memory.c:1590
 exit_mmap+0x213/0x440 mm/mmap.c:3072
 __mmput kernel/fork.c:940 [inline]
 mmput+0xeb/0x370 kernel/fork.c:961
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x905/0x2a20 kernel/exit.c:862
 do_group_exit+0x100/0x2e0 kernel/exit.c:978
 get_signal+0x39f/0x1cc0 kernel/signal.c:2422
 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4598e9
RSP: 002b:00007fe02f8f1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffe0 RBX: 0000000000000006 RCX: 00000000004598e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000020000000 R09: 0000000000000010
R10: 0000000020000804 R11: 0000000000000246 R12: 00007fe02f8f26d4
R13: 00000000004c7874 R14: 00000000004dd170 R15: 00000000ffffffff
Kernel Offset: 0x2d600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..