------------[ cut here ]------------
WARNING: CPU: 1 PID: 3000 at net/ipv6/ip6_fib.c:1477 fib6_del+0x947/0xca0 net/ipv6/ip6_fib.c:1477
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3000 Comm: syz-fuzzer Not tainted 4.13.0-rc7+ #62
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+0x947/0xca0 net/ipv6/ip6_fib.c:1477
RSP: 0000:ffff8801db3074d8 EFLAGS: 00010206
RAX: ffff8801d1c36180 RBX: ffff8801d8d281c0 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffff8801db307650 RDI: ffff8801d8d28224
RBP: ffff8801db3075f0 R08: ffffffff86df1808 R09: 0000000000000002
R10: ffff8801db3074b8 R11: 1ffff1003a386e8b R12: dffffc0000000000
R13: ffff8801db307650 R14: ffff8801d8602240 R15: 1ffff1003b660ea5
 __ip6_del_rt+0xc7/0x120 net/ipv6/route.c:2136
 ip6_del_rt+0x132/0x1a0 net/ipv6/route.c:2149
 ip6_link_failure+0x244/0x380 net/ipv6/route.c:1359
 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:lock_release+0x505/0xa40 kernel/locking/lockdep.c:3877
RSP: 0000:ffff8801d32dfa90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8801d1c36180 RCX: 1ffff1003a386d3e
RDX: 1ffffffff0b59371 RSI: 0000000000000002 RDI: 0000000000000286
RBP: ffff8801d32dfbc0 R08: 0000000000000001 R09: 1ffff1003a65bf5b
R10: 0000000000000000 R11: 0000000000000001 R12: 6d3f988a3e52ee07
R13: ffff8801d1c36180 R14: ffff8801d32dfad8 R15: 1ffff1003a65bf57
 </IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x1a/0x30 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:339 [inline]
 do_anonymous_page mm/memory.c:2989 [inline]
 handle_pte_fault mm/memory.c:3749 [inline]
 __handle_mm_fault+0x2349/0x3860 mm/memory.c:3869
 handle_mm_fault+0x3bb/0x860 mm/memory.c:3906
 __do_page_fault+0x4f6/0xb60 arch/x86/mm/fault.c:1445
 do_page_fault+0x54/0x70 arch/x86/mm/fault.c:1508
 page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1007
RIP: 0033:0x45e813
RSP: 002b:00007ffcd6066688 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000004000 RCX: 0000000000006000
RDX: 0000000000000002 RSI: 000000000000001b RDI: 000000c435c96000
RBP: 00007ffcd60666d0 R08: 000000c000000000 R09: 000000000000ae4c
R10: 0000000000b613e0 R11: 0000000000000006 R12: 0000000000000000
R13: 00000000000000f2 R14: 0000000000000032 R15: 0000000000000011
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..