------------[ cut here ]------------
WARNING: CPU: 1 PID: 3750 at net/ipv6/ip6_fib.c:1490 fib6_del+0x9d7/0xd50 net/ipv6/ip6_fib.c:1490
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3750 Comm: syz-executor1 Not tainted 4.13.0-rc7+ #65
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:180
 __warn+0x1c4/0x1d9 kernel/panic.c:541
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846
RIP: 0010:fib6_del+0x9d7/0xd50 net/ipv6/ip6_fib.c:1490
RSP: 0018:ffff8801db307498 EFLAGS: 00010206
RAX: ffff8801c5bf8500 RBX: ffff8801cc5ca8c0 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffff8801cea19a30 RDI: ffff8801cc5ca924
RBP: ffff8801db3075b0 R08: ffffffff86df14a8 R09: 0000000000000002
R10: ffff8801db307478 R11: 1ffff10038b7f2fb R12: dffffc0000000000
R13: ffff8801db307610 R14: ffff88019d5c81c0 R15: 1ffff1003b660e9d
 __ip6_del_rt+0xc7/0x120 net/ipv6/route.c:2146
 ip6_del_rt+0x132/0x1a0 net/ipv6/route.c:2159
 ip6_link_failure+0x1a6/0x580 net/ipv6/route.c:1362
 dst_link_failure include/net/dst.h:454 [inline]
 ndisc_error_report+0xae/0x180 net/ipv6/ndisc.c:682
 neigh_invalidate+0x225/0x530 net/core/neighbour.c:883
 neigh_timer_handler+0x883/0xca0 net/core/neighbour.c:969
 call_timer_fn+0x233/0x830 kernel/time/timer.c:1281
 expire_timers kernel/time/timer.c:1320 [inline]
 __run_timers+0x7fd/0xb90 kernel/time/timer.c:1620
 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1646
 __do_softirq+0x2f5/0xba3 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:638 [inline]
 smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:1044
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:702
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:814 [inline]
RIP: 0010:rmqueue mm/page_alloc.c:2852 [inline]
RIP: 0010:get_page_from_freelist+0x262c/0x3430 mm/page_alloc.c:3160
RSP: 0018:ffff8801c5c46b38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: 000000000000000f RCX: 0000000000000000
RDX: 1ffffffff0b59371 RSI: 0000000000000001 RDI: 0000000000000286
RBP: ffff8801c5c47220 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffea000718e600 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffed0038b88dbf R15: ffff8801c5c471f8
 </IRQ>
 __alloc_pages_nodemask+0x516/0xd40 mm/page_alloc.c:4115
 __alloc_pages include/linux/gfp.h:471 [inline]
 __alloc_pages_node include/linux/gfp.h:484 [inline]
 alloc_pages_node include/linux/gfp.h:498 [inline]
 alloc_thread_stack_node kernel/fork.c:235 [inline]
 dup_task_struct kernel/fork.c:517 [inline]
 copy_process.part.35+0x441/0x4bd0 kernel/fork.c:1583
 copy_process kernel/fork.c:1554 [inline]
 _do_fork+0x1ef/0xfb0 kernel/fork.c:2035
 SYSC_clone kernel/fork.c:2145 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2139
 do_syscall_64+0x26c/0x800 arch/x86/entry/common.c:284
 entry_SYSCALL64_slow_path+0x25/0x25
RIP: 0033:0x4547e9
RSP: 002b:0000000000a6f738 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f31c5cde700 RCX: 00000000004547e9
RDX: 00007f31c5cde9d0 RSI: 00007f31c5cdddb0 RDI: 00000000003d0f00
RBP: 0000000000a6f870 R08: 00007f31c5cde700 R09: 00007f31c5cde700
R10: 00007f31c5cde9d0 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000a6f7ef R14: 00007f31c5cde9c0 R15: 0000000000000008
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..