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

CPU: 0 PID: 1 Comm: init Not tainted 4.4.128-gbd23e3a #20
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 e8de7696a1bf5661 ffff8801d9abfa08 ffffffff81e0daad
 ffffffff83a45140 000000000000000b ffff8801d9ad0010 dffffc0000000000
 ffff8801d9ad0010 ffff8801d9abfac8 ffffffff81409eb4 0000000041b58ab3
Call Trace:
 [<ffffffff81e0daad>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e0daad>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81409eb4>] panic+0x19e/0x38d kernel/panic.c:112
 [<ffffffff8140a43c>] find_child_reaper kernel/exit.c:478 [inline]
 [<ffffffff8140a43c>] forget_original_parent kernel/exit.c:567 [inline]
 [<ffffffff8140a43c>] exit_notify kernel/exit.c:603 [inline]
 [<ffffffff8140a43c>] do_exit.cold.21+0xed/0x2bb kernel/exit.c:780
 [<ffffffff8113b0c1>] do_group_exit+0x111/0x330 kernel/exit.c:889
 [<ffffffff8115e43c>] get_signal+0x4ec/0x14b0 kernel/signal.c:2317
 [<ffffffff8100e02b>] do_signal+0x8b/0x1d30 arch/x86/kernel/signal.c:712
 [<ffffffff8100360a>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:248
 [<ffffffff81006363>] prepare_exit_to_usermode+0xe3/0x100 arch/x86/entry/common.c:283
 [<ffffffff838bf308>] retint_user+0x8/0x3c
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..