[Bug 1329680]

[Apport retracing service]

StacktraceTop:
 find_first_parent (path=0x7575757575757575 <error: Cannot access memory at address 0x7575757575757575>) at upstart-file-bridge.c:1728
 delete_handler (dir=0x7f186b8d1f10, watch=<optimized out>, path=0x7f186b8cfef0 "/var/run/avahi-daemon/disabled-for-unicast-local") at upstart-file-bridge.c:1230
 nih_watch_handle (cookie=<optimized out>, caught_free=0x7fffa4c53ee4, name=0x7f186b8db7b0 'u' <repeats 200 times>..., events=512, handle=<optimized out>, watch=0x7f186b8d2290) at watch.c:618
 nih_watch_reader (watch=0x7f186b8d2290, io=0x7f186b8d2720, buf=0x7f186b8db7a0 'u' <repeats 200 times>..., len=<optimized out>) at watch.c:462
 nih_io_watcher (io=0x7f186b8d2720, watch=0x7f186b8d2930, events=NIH_IO_READ) at io.c:947

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https://bugs.launchpad.net/bugs/1329680

Title:
  upstart-file-bridge crashed with SIGSEGV in find_first_parent()

Status in “upstart” package in Ubuntu:
  New

Bug description:
  This crash occurred while my system was connecting to a new Wifi
  network.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: upstart 1.12.1-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  Date: Fri Jun 13 10:00:10 2014
  EcryptfsInUse: Yes
  ExecutablePath: /sbin/upstart-file-bridge
  ProcCmdline: upstart-file-bridge --daemon --user
  SegvAnalysis:
   Segfault happened at: 0x7f186aef9c42:	cmpb   $0x2f,(%rdi)
   PC (0x7f186aef9c42) ok
   source "$0x2f" ok
   destination "(%rdi)" (0x7575757575757575) not located in a known VMA region (needed writable region)!
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: upstart
  StacktraceTop:
   ?? ()
   ?? ()
   ?? () from /lib/x86_64-linux-gnu/libnih.so.1
   ?? () from /lib/x86_64-linux-gnu/libnih.so.1
   nih_io_handle_fds () from /lib/x86_64-linux-gnu/libnih.so.1
  Title: upstart-file-bridge crashed with SIGSEGV in nih_io_handle_fds()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UpstartBugCategory: Session
  UserGroups: adm autopilot cdrom dip fuse libvirtd lpadmin plugdev sambashare staff sudo
  upstart.upstart-event-bridge.log: upstart-event-bridge: Disconnected from Upstart

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