Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000013

CPU: 0 PID: 1 Comm: init Not tainted 4.9.71-g2506378 #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801da217a08 ffffffff81d922b9 ffffffff83a48b80 ffff8801da217ae0
 ffff8801da228000 dffffc0000000000 ffff8801da228010 ffff8801da217ad0
 ffffffff8142d741 0000000041b58ab3 ffffffff84188580 ffffffff8142d585
Call Trace:
 [<ffffffff81d922b9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d922b9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142d741>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8113c057>] find_child_reaper kernel/exit.c:548 [inline]
 [<ffffffff8113c057>] forget_original_parent kernel/exit.c:637 [inline]
 [<ffffffff8113c057>] exit_notify kernel/exit.c:673 [inline]
 [<ffffffff8113c057>] do_exit+0x2337/0x2a40 kernel/exit.c:855
 [<ffffffff81140c18>] do_group_exit+0x108/0x320 kernel/exit.c:937
 [<ffffffff81163a44>] get_signal+0x4d4/0x14e0 kernel/signal.c:2315
 [<ffffffff81052c87>] do_signal+0x87/0x1a00 arch/x86/kernel/signal.c:807
 [<ffffffff81003a31>] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:156
 [<ffffffff81006340>] prepare_exit_to_usermode arch/x86/entry/common.c:190 [inline]
 [<ffffffff81006340>] syscall_return_slowpath+0x1a0/0x1e0 arch/x86/entry/common.c:259
 [<ffffffff838af026>] entry_SYSCALL_64_fastpath+0xc4/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..