syzbot

sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0
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WARNING: CPU: 0 PID: 0 at net/ipv6/ip6_fib.c:1475 fib6_del+0x7a3/0xa30 net/ipv6/ip6_fib.c:1475
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.52-gc30c69c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801db207998 ffffffff81d93149 ffffffff83a46b40 ffff8801db207a70
 ffffffff83f47f00 ffffffff8346cd23 0000000000000009 ffff8801db207a60
 ffffffff8142e771 0000000041b58ab3 ffffffff84185358 ffffffff8142e5b5
Call Trace:
 <IRQ> [   42.702752]  [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [   42.702752]  [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e771>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff81131ed4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8113213c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff8346cd23>] fib6_del+0x7a3/0xa30 net/ipv6/ip6_fib.c:1475
 [<ffffffff8344ce50>] __ip6_del_rt+0x100/0x160 net/ipv6/route.c:2140
 [<ffffffff8346009a>] ip6_del_rt+0xca/0x110 net/ipv6/route.c:2153
 [<ffffffff83461513>] ip6_link_failure+0x243/0x3e0 net/ipv6/route.c:1339
 [<ffffffff83474f8e>] dst_link_failure include/net/dst.h:490 [inline]
 [<ffffffff83474f8e>] ndisc_error_report+0xae/0x190 net/ipv6/ndisc.c:671
 [<ffffffff82f5d275>] neigh_invalidate+0x225/0x530 net/core/neighbour.c:847
 [<ffffffff82f62c67>] neigh_timer_handler+0x597/0xa10 net/core/neighbour.c:933
 [<ffffffff812a5044>] call_timer_fn+0x164/0x700 kernel/time/timer.c:1321
 [<ffffffff812a5f33>] expire_timers kernel/time/timer.c:1361 [inline]
 [<ffffffff812a5f33>] __run_timers kernel/time/timer.c:1660 [inline]
 [<ffffffff812a5f33>] run_timer_softirq+0x693/0x1640 kernel/time/timer.c:1686
 [<ffffffff838af45d>] __do_softirq+0x22d/0x964 kernel/softirq.c:284
 [<ffffffff81147985>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff81147985>] irq_exit+0x165/0x190 kernel/softirq.c:405
 [<ffffffff838aecfb>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff838aecfb>] smp_apic_timer_interrupt+0x7b/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff838add9c>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:709
 <EOI> [   42.916524]  [<ffffffff838ab246>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
 [<ffffffff838aa875>] arch_safe_halt arch/x86/include/asm/paravirt.h:103 [inline]
 [<ffffffff838aa875>] default_idle+0x55/0x360 arch/x86/kernel/process.c:295
 [<ffffffff8106c44a>] arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:286
 [<ffffffff838ab696>] default_idle_call+0x36/0x60 kernel/sched/idle.c:97
 [<ffffffff8122612c>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff8122612c>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff8122612c>] cpu_startup_entry+0x30c/0x3d0 kernel/sched/idle.c:303
 [<ffffffff83897a44>] rest_init+0x184/0x190 init/main.c:408
 [<ffffffff84a658a7>] start_kernel+0x679/0x6ae init/main.c:662
 [<ffffffff84a6429d>] x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:196
 [<ffffffff84a643df>] x86_64_start_kernel+0x140/0x163 arch/x86/kernel/head64.c:177
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..