linux-kernel - kernel panic: Attempted to kill init! (2)

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Message-ID: <001a1140792a4926cf05616305e6@google.com>
Date:   Thu, 28 Dec 2017 01:20:01 -0800
From:   syzbot <syzbot+bab350dcd3afb1945f4b@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, dave@...olabs.net,
        keescook@...omium.org, linux-kernel@...r.kernel.org,
        mingo@...nel.org, peterz@...radead.org, rppt@...ux.vnet.ibm.com,
        sds@...ho.nsa.gov, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: kernel panic: Attempted to kill init! (2)

Hello,

syzkaller hit the following crash on  
6084b576dca2e898f5c101baef151f7bfdbb606d
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+bab350dcd3afb1945f4b@...kaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for  
details.
If you forward the report, please keep this part and the footer.

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:00007ffe8c9df0b0 EFLAGS: 00010286
RAX: ffffffffffffffff

---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzkaller@...glegroups.com.

syzbot will keep track of this bug report.
If you forgot to add the Reported-by tag, once the fix for this bug is  
merged
into any tree, please reply to this email with:
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Note: if the crash happens again, it will cause creation of a new bug  
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