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

CPU: 1 PID: 1 Comm: init Not tainted 4.18.0-rc8+ #33
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+0x17c/0x1c0 lib/dump_stack.c:113
 panic+0x3c3/0x9a0 kernel/panic.c:184
 find_child_reaper kernel/exit.c:579 [inline]
 forget_original_parent kernel/exit.c:671 [inline]
 exit_notify kernel/exit.c:707 [inline]
 do_exit+0x3888/0x3890 kernel/exit.c:887
 do_group_exit+0x1a0/0x350 kernel/exit.c:970
 get_signal+0x1425/0x1ef0 kernel/signal.c:2468
 do_signal+0x120/0x2090 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline]
 prepare_exit_to_usermode+0x273/0x410 arch/x86/entry/common.c:197
 syscall_return_slowpath+0xdb/0x700 arch/x86/entry/common.c:268
 do_syscall_64+0x1ab/0x220 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x7f6557669dd3
Code: Bad RIP value.
RSP: 002b:00007fffe23143f8 EFLAGS: 00000346 ORIG_RAX: 0000000000000017
RAX: 0000000000000000 RBX: 00007fffe23145a0 RCX: 00007f6557669dd3
RDX: 0000000000000000 RSI: 00007fffe2314750 RDI: 000000000000000b
RBP: 00007fffe2314750 R08: 00007fffe23147d0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000346 R12: 00000000ffffffff
R13: 00007fffe2314b30 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..