** Description changed:

- This application crashed immediately when I put in a DVD with region
- code 1 in my code 2 laptop and selected "Open with VLC". No idea though
- whether the region has any influence on this problem.
+ [Impact]
+ VLC (and Totem) crash in dvdnav_describe_title_chapters() when attempting to 
play DVDs with a different region code than the player, and perhaps under other 
circumstances.
+ 
+ [Test Case]
+ Verify player is set to play one specific region code.
+ Insert DVD with a differing (unsupported) region code.
+ Launch VLC and open the DVD.
+ 
+ [Regression Potential]
+ This just adds a check that the cell ID is not 0.  0 is not a valid ID.
+ Upstream reviewed and accepted this patch, so it's had wide testing.
+ 
+ [Original Report]
+ This application crashed immediately when I put in a DVD with region code 1 
in my code 2 laptop and selected "Open with VLC". No idea though whether the 
region has any influence on this problem.
  
  There was no user input.
  
  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: vlc-nox 2.0.0~unix-0ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
  Uname: Linux 3.2.0-16-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.91-0ubuntu1
  Architecture: amd64
  CheckboxSubmission: 05c436e63dfa019ccd464d7387e4a841
  CheckboxSystem: b845c366ea09c60efa3a45c1b5b21525
  CrashCounter: 1
  Date: Fri Feb 17 21:18:01 2012
  ExecutablePath: /usr/bin/vlc
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110824)
  ProcCmdline: /usr/bin/vlc /media/MOON_MACHINES
  SegvAnalysis:
-  Segfault happened at: 0x7f3eb81166e5 <dvdnav_describe_title_chapters+659>:   
movzbl (%rax),%eax
-  PC (0x7f3eb81166e5) ok
-  source "(%rax)" (0xffffffffffffffff) not located in a known VMA region 
(needed readable region)!
-  destination "%eax" ok
-  Stack memory exhausted (SP below stack segment)
+  Segfault happened at: 0x7f3eb81166e5 <dvdnav_describe_title_chapters+659>:   
movzbl (%rax),%eax
+  PC (0x7f3eb81166e5) ok
+  source "(%rax)" (0xffffffffffffffff) not located in a known VMA region 
(needed readable region)!
+  destination "%eax" ok
+  Stack memory exhausted (SP below stack segment)
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: vlc
  StacktraceTop:
-  dvdnav_describe_title_chapters () from /usr/lib/libdvdnav.so.4
-  ?? () from /usr/lib/vlc/plugins/access/libdvdnav_plugin.so
-  vlc_module_load () from /usr/lib/libvlccore.so.5
-  ?? () from /usr/lib/libvlccore.so.5
-  ?? () from /usr/lib/libvlccore.so.5
+  dvdnav_describe_title_chapters () from /usr/lib/libdvdnav.so.4
+  ?? () from /usr/lib/vlc/plugins/access/libdvdnav_plugin.so
+  vlc_module_load () from /usr/lib/libvlccore.so.5
+  ?? () from /usr/lib/libvlccore.so.5
+  ?? () from /usr/lib/libvlccore.so.5
  Title: vlc crashed with SIGSEGV in dvdnav_describe_title_chapters()
  UpgradeStatus: Upgraded to precise on 2012-02-17 (0 days ago)
  UserGroups: adm admin cdrom debian-tor dialout lpadmin plugdev sambashare

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https://bugs.launchpad.net/bugs/934471

Title:
  vlc crashed with SIGSEGV in dvdnav_describe_title_chapters()

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