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[Alberto Salvia Novella <es20490446e@xxxxxxxxx>]

** Changed in: lightdm (Ubuntu)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1504724

Title:
  lightdm crashed with SIGSEGV in munmap()

Status in lightdm package in Ubuntu:
  Confirmed

Bug description:
  crash at startup

  ProblemType: Crash
  DistroRelease: Ubuntu 15.10
  Package: lightdm 1.16.3-0ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-15.18-generic 4.2.3
  Uname: Linux 4.2.0-15-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.19.1-0ubuntu2
  Architecture: amd64
  Date: Fri Oct  9 23:46:03 2015
  ExecutablePath: /usr/sbin/lightdm
  LightdmGreeterLog:
   ** Message: Starting lightdm-gtk-greeter 2.0.1 (Aug  7 2015, 01:24:18)
   ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf.d/01_ubuntu.conf
   ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf.d/99_ubuntu-mate.conf
   ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf
   upstart: indicator-application main process (2433) terminated with status 1
  LightdmGreeterLogOld:
   ** Message: Starting lightdm-gtk-greeter 2.0.1 (Aug  7 2015, 01:24:18)
   ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf.d/01_ubuntu.conf
   ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf.d/99_ubuntu-mate.conf
   ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf
   upstart: indicator-application main process (2426) killed by TERM signal
  ProcCmdline: lightdm --session-child 12 19
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  SegvAnalysis:
   Segfault happened at: 0x7f8c59f0fb94 <_dl_fini+452>:	add    0x8(%rax),%r12
   PC (0x7f8c59f0fb94) ok
   source "0x8(%rax)" (0x7f8c4a545e08) not located in a known VMA region (needed readable region)!
   destination "%r12" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: lightdm
  StacktraceTop:
   munmap () at ../sysdeps/unix/syscall-template.S:81
   _dl_unmap_segments (l=0x1d2c910, l=0x1d2c910) at ./dl-unmap-segments.h:32
   _dl_unmap (map=map@entry=0x1d2c910) at ../sysdeps/x86_64/tlsdesc.c:140
   _dl_close_worker (map=map@entry=0x1d2c440) at dl-close.c:641
   _dl_close_worker (map=0x1d2c440) at dl-close.c:125
  Title: lightdm crashed with SIGSEGV in munmap()
  UpgradeStatus: No upgrade log present (probably fresh install)
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