[Bug 1504724] [NEW] lightdm crashed with SIGSEGV in munmap()

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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 at entry=0x1d2c910) at ../sysdeps/x86_64/tlsdesc.c:140
 _dl_close_worker (map=map at 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)
UserGroups:

** Affects: pam (Ubuntu)
     Importance: Critical
         Status: Triaged


** Tags: amd64 apport-crash apport-failed-retrace wily
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lightdm crashed with SIGSEGV in munmap()
https://bugs.launchpad.net/bugs/1504724
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