WARNING: CPU: 0 PID: 4526 at net/ipv4/tcp_input.c:1958 tcp_enter_loss+0xfa0/0x1680 net/ipv4/tcp_input.c:1958
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4526 Comm: syz-executor431 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 panic+0x39d/0x940 kernel/panic.c:183
 __warn+0x40f/0x580 kernel/panic.c:547
 report_bug+0x72a/0x880 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x1aa/0x600 arch/x86/kernel/traps.c:297
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:tcp_enter_loss+0xfa0/0x1680 net/ipv4/tcp_input.c:1958
RSP: 0018:ffff88021fc0fa70 EFLAGS: 00010206
RAX: ffffffff884e09c0 RBX: 0000000000000000 RCX: ffff880198308000
RDX: 0000000000000100 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
RBP: ffff88021fc0fb38 R08: 0000000000000000 R09: ffff8801ce3d2ed8
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cd3bae94
R13: ffff8801cd3badfc R14: 0000000000000002 R15: 0000000000000003
 tcp_retransmit_timer+0x2179/0x4260 net/ipv4/tcp_timer.c:486
 tcp_write_timer_handler+0x38f/0xed0 net/ipv4/tcp_timer.c:573
 tcp_write_timer+0x13d/0x290 net/ipv4/tcp_timer.c:593
 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x56d/0x93d kernel/softirq.c:285
 invoke_softirq kernel/softirq.c:365 [inline]
 irq_exit+0x202/0x240 kernel/softirq.c:405
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:541
 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857
 </IRQ>
RIP: 0010:finish_lock_switch+0x38/0x50 kernel/sched/core.c:2632
RSP: 0018:ffff8801ae09fc08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12
RAX: ffff88021f0dab00 RBX: ffff880198308918 RCX: ffff880000000000
RDX: ffff88021f0dbb00 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
RBP: ffff8801ae09fc20 R08: 0000000001080020 R09: 0000000000000002
R10: ffffffff7fffffff R11: 0000000000000000 R12: ffff88021fc3eb00
R13: 0000000000000001 R14: 0000000000000000 R15: ffff88021f0dab00
 finish_task_switch+0xdb/0x230 kernel/sched/core.c:2719
 context_switch kernel/sched/core.c:2869 [inline]
 __schedule+0x68e/0x730 kernel/sched/core.c:3446
 schedule+0x1cc/0x2f0 kernel/sched/core.c:3505
 exit_to_usermode_loop arch/x86/entry/common.c:152 [inline]
 prepare_exit_to_usermode+0x1cc/0x3a0 arch/x86/entry/common.c:196
 syscall_return_slowpath+0xe9/0x700 arch/x86/entry/common.c:265
 do_syscall_64+0x36d/0x430 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x441bc9
RSP: 002b:00007fff062b39e8 EFLAGS: 00000207 ORIG_RAX: 0000000000000001
RAX: 0000000000000012 RBX: 0000000000000036 RCX: 0000000000441bc9
RDX: 0000000000000012 RSI: 00000000004a3895 RDI: 0000000000000001
RBP: 00000000006cd018 R08: 0000000000000000 R09: 0000000000000000
R10: 000000002000023b R11: 0000000000000207 R12: 0000000000402810
R13: 00000000004028a0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..