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

CPU: 1 PID: 1 Comm: init Not tainted 4.9.61-ga93e312 #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801da20fa08 ffffffff81d91589 ffffffff83a48a20 ffff8801da20fae0
 ffff8801da220000 dffffc0000000000 ffff8801da220010 ffff8801da20fad0
 ffffffff8142e391 0000000041b58ab3 ffffffff84185db0 ffffffff8142e1d5
Call Trace:
 [<ffffffff81d91589>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d91589>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e391>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8113ee37>] find_child_reaper kernel/exit.c:548 [inline]
 [<ffffffff8113ee37>] forget_original_parent kernel/exit.c:637 [inline]
 [<ffffffff8113ee37>] exit_notify kernel/exit.c:673 [inline]
 [<ffffffff8113ee37>] do_exit+0x2337/0x2a40 kernel/exit.c:855
 [<ffffffff811439f8>] do_group_exit+0x108/0x320 kernel/exit.c:937
 [<ffffffff811665e4>] get_signal+0x4d4/0x14e0 kernel/signal.c:2315
 [<ffffffff81052c87>] do_signal+0x87/0x1960 arch/x86/kernel/signal.c:807
 [<ffffffff81003a31>] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:156
 [<ffffffff81006188>] prepare_exit_to_usermode+0xc8/0xe0 arch/x86/entry/common.c:190
 [<ffffffff838aacf4>] retint_user+0x8/0x20
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..