Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000005

CPU: 0 PID: 1 Comm: init Not tainted 4.18.0-next-20180813+ #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 find_child_reaper kernel/exit.c:579 [inline]
 forget_original_parent.cold.21+0x7b/0xd5 kernel/exit.c:675
 exit_notify kernel/exit.c:712 [inline]
 do_exit+0x1b54/0x26e0 kernel/exit.c:891
 do_group_exit+0x177/0x440 kernel/exit.c:974
 get_signal+0x851/0x18e0 kernel/signal.c:2513
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f16b893ddd3
Code: Bad RIP value.
RSP: 002b:00007ffe3b68a828 EFLAGS: 00000346 ORIG_RAX: 0000000000000017
RAX: 0000000000000000 RBX: 00007ffe3b68a9d0 RCX: 00007f16b893ddd3
RDX: 0000000000000000 RSI: 00007ffe3b68ab80 RDI: 000000000000000b
RBP: 00007ffe3b68ab80 R08: 00007ffe3b68ac00 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000346 R12: 00000000ffffffff
R13: 00007ffe3b68af60 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..