vlc assert failure: *** Error in `/usr/bin/vlc': free(): invalid next size (fast): 0x00007fa2c4cca3b0 ***

[Sslaxx]

Attempting to play some sound files through VLC (in particular, it seems ones only a few seconds long), causes VLC to crash, locking the program up (and taking up 100% of a CPU core).

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: vlc-nox 2.2.0~pre2-4build1
ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3
Uname: Linux 3.16.0-18-generic x86_64
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
AssertionMessage: *** Error in `/usr/bin/vlc': free(): invalid next size (fast): 0x00007fa2c4cca3b0 ***
CurrentDesktop: Unity
Date: Mon Sep 29 21:11:02 2014
ExecutablePath: /usr/bin/vlc
InstallationDate: Installed on 2014-07-05 (86 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcCmdline: /usr/bin/vlc --started-from-file /home/username/Data/Media/Sound/Games/DungeonsAndDragons/BaldursGate/1/OST/06-Gorions-Battle.ogg
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: vlc
StacktraceTop:
 __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fa315461a40 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
 malloc_printerr (ptr=<optimised out>, str=0x7fa315461be0 "free(): invalid next size (fast)", action=1) at malloc.c:4996
 _int_free (av=<optimised out>, p=<optimised out>, have_lock=0) at malloc.c:3840
 ?? () from /usr/lib/vlc/plugins/demux/libogg_plugin.so
 ?? () from /usr/lib/libvlccore.so.8
Title: vlc assert failure: *** Error in `/usr/bin/vlc': free(): invalid next size (fast): 0x00007fa2c4cca3b0 ***
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fa315461a40 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
 malloc_printerr (ptr=<optimized out>, str=0x7fa315461be0 "free(): invalid next size (fast)", action=1) at malloc.c:4996
 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3840
 Demux (p_demux=0x7fa2c4c2ae48) at demux/ogg.c:563
 demux_Demux (p_demux=0x7fa2c4c2ae48) at input/demux.h:44

[Rémi Denis-Courmont (rdenis)]

There has been a number of fixes to the Ogg demux plugin since 2.2.0-pre2. Please retry and provide a sample file if the problem still occurs.

[Launchpad Janitor (janitor)]

[Expired for vlc (Ubuntu) because there has been no activity for 60 days.]

[Jan Rathmann (kaiserclaudius)]

I'm seeing this crash under Wily and was redirected here by apport.

I could narrow the cause down to the following config option in my ~/.config/vlc/vlcrc:

avcodec-hw=vaapi_x11

If I comment out this option or set it to a another value, the crash does not happen and playback works fine.

Here are the steps to reproduce this in a clean guest session:

1. Start VLC
2. Select "Tools -> Preferences -> Show settings: "All" -> Input / Codec -> Video Codecs -> ffmpeg -> Hardware decoding -> VA-API video decoder via X11"
3. Close VLC
4. Download the following example video: http://medien.wdr.de/m/1444056885/menschenhautnah/wdr_fernsehen_menschen_hautnah_20151008.mp4
5. Try to play it with VLC. It will crash immediately.

This seems to happen only with MP4 videos encoded in a certain way, because most of the MP4 files I have tested do not crash with this setting.

Kind regards,
Jan

[Sebastian Ramacher (s-ramacher)]

This sound like a different issue to me. The original report report talked about sound files. So vaapi is not involved. Jan, if you still see this issue, please file a new bug report.

Marking as fixed. The Ogg fixes have been released.