Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

CPU: 1 PID: 1 Comm: init Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xe9/0x14b lib/dump_stack.c:53
 panic+0x10e/0x2f8 kernel/panic.c:183
 find_child_reaper kernel/exit.c:578 [inline]
 forget_original_parent kernel/exit.c:674 [inline]
 exit_notify kernel/exit.c:710 [inline]
 do_exit+0x1045/0x1050 kernel/exit.c:889
 do_group_exit+0x60/0x100 kernel/exit.c:972
 get_signal+0x36c/0xad0 kernel/signal.c:2337
 do_signal+0x23/0x670 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x13c/0x160 arch/x86/entry/common.c:161
 prepare_exit_to_usermode+0x102/0x110 arch/x86/entry/common.c:195
 retint_user+0x8/0x18
RIP: 0033:          (null)
RSP: 002b:00007ffc853846f0 EFLAGS: 00010286
RAX: ffffffffffffffff RBX: 00007fa1270ed6a