[Bug 1222705] Re: init assert failure: alloc.c:633: Assertion failed in nih_unref: ref != NULL

[Steve Langasek]

Have just reproduced this bug here with Ubuntu Touch running on an
emulator.  When it happened, I was interacting with the upstart session
bus from the commandline.  I ran 'initctl list | grep app' to get the
pid for an instance of the application-click job, so that I could
manually kill it instead of having to construct the 'stop' command with
all of the variables etc.  So then I ran 'kill $pid', and saw that the
process didn't immediately die, so sent 'kill -9 $pid'.

Then I checked 'initctl list' output again and saw that the job was in
the post-stop script.  Then I checked 'initctl list' again, and found
that the connection was refused on the dbus socket because the upstart
session init had died.

My backtrace matches that of Saviq in comment #12 (i.e., nothing
interesting before the nih_unref() call).

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Title:
  init assert failure: alloc.c:633: Assertion failed in nih_unref: ref
  != NULL

Status in Upstart:
  New
Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  Occurred immediately after bug 1222702 happened.

  ProblemType: Crash
  DistroRelease: Ubuntu 13.10
  Package: upstart 1.10-0ubuntu1 [modified: usr/share/upstart/sessions/upstart-file-bridge.conf]
  ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
  Uname: Linux 3.11.0-4-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.1-0ubuntu3
  Architecture: i386
  AssertionMessage: alloc.c:633: Assertion failed in nih_unref: ref != NULL
  Date: Mon Sep  9 09:44:34 2013
  ExecutablePath: /sbin/init
  InstallationDate: Installed on 2010-10-21 (1054 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MarkForUpload: True
  ProcCmdline: init --user
  ProcEnviron:
   LANGUAGE=en_GB
   PATH=(custom, user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  Signal: 6
  SourcePackage: upstart
  StacktraceTop:
   nih_unref () from /lib/i386-linux-gnu/libnih.so.1
   ?? ()
   ?? ()
   ?? ()
   nih_child_poll () from /lib/i386-linux-gnu/libnih.so.1
  Title: init assert failure: alloc.c:633: Assertion failed in nih_unref: ref != NULL
  UpgradeStatus: Upgraded to saucy on 2013-06-23 (77 days ago)
  UpstartBugCategory: Session
  UpstartRunningSessionCount: 1
  UpstartRunningSessionVersion: init (upstart 1.10)
  UpstartRunningSystemVersion: init (upstart 1.10)
  UserGroups: adm admin audio cdrom dialout kvm libvirtd lpadmin plugdev sambashare sbuild vboxusers
  upstart.shutdown.override: manual

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