invalid inflight: 1 state 5 cwnd 10 mss 21888
------------[ cut here ]------------
WARNING: CPU: 0 PID: 22202 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: 22202 Comm: syz-executor.2 Not tainted 4.14.145+ #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: 000000000000002d RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffffaaa69f80 RDI: ffffed103b740f87
RBP: ffff8881d2d01600 R08: 000000000000002d R09: ffffed103b744ce9
R10: ffffed103b744ce8 R11: ffff8881dba26747 R12: 0000000000005580
R13: 0000000000000001 R14: 000000000000000a R15: ffff8881d2d01600
 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_acquire+0x170/0x360 kernel/locking/lockdep.c:3994
RSP: 0018:ffff8881a1857838 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000007 RBX: ffff8881d3882f00 RCX: 1ffff1103a7106f4
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000246
RBP: ffffffffab0d4260 R08: 0000000000000000 R09: 0000000000000002
R10: ffff8881d3883780 R11: 35b2c3184ea1274e R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:242 [inline]
 rcu_read_lock include/linux/rcupdate.h:629 [inline]
 count_memcg_event_mm include/linux/memcontrol.h:654 [inline]
 handle_mm_fault+0x11d/0x6da mm/memory.c:4130
 __do_page_fault+0x477/0xbb0 arch/x86/mm/fault.c:1420
 page_fault+0x22/0x50 arch/x86/entry/entry_64.S:1122
RIP: 0010:copy_user_enhanced_fast_string+0x7/0x10 arch/x86/lib/copy_user_64.S:181
RSP: 0018:ffff8881a1857a48 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000001eb0 RCX: 00000000000017b0
RDX: 0000000000001eb0 RSI: 0000000020237000 RDI: ffff8881a01ee850
RBP: 0000000020236900 R08: ffffed103403e000 R09: 0000000000000000
R10: ffffed103403dfff R11: ffff8881a01effff R12: ffff8881a01ee150
R13: 00007ffffffff000 R14: 00000000202387b0 R15: ffff8881a01ee150
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 copyin+0x99/0xc0 lib/iov_iter.c:146
 _copy_from_iter_full+0x195/0x680 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1881 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1907 [inline]
 tcp_sendmsg_locked+0x24a4/0x2f50 net/ipv4/tcp.c:1360
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
 inet_sendmsg+0x15b/0x520 net/ipv4/af_inet.c:760
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb7/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1de/0x2f0 net/socket.c:1731
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459a09
RSP: 002b:00007f106f89dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459a09
RDX: 00000000fffffdda RSI: 0000000020000200 RDI: 0000000000000009
RBP: 000000000075bf20 R08: 0000000000000000 R09: 00000000fffffee0
R10: 000000008dffffff R11: 0000000000000246 R12: 00007f106f89e6d4
R13: 00000000004c79b8 R14: 00000000004dd418 R15: 00000000ffffffff
Kernel Offset: 0x27c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..