Public bug reported:
I'm seeing memory-related crashes when playing videos sliced (with
ffmpeg -c copy) from mp4 streams (downloaded with youtube-dl). I'm
attaching a sample clip which, granted, is pretty useless for a video,
but which produces these crashes with 100% certainty for me; I just
edited it down to a reasonable size and non-infringing content.
The errors reported just before core is dumped are (mostly) "double free
or corruption (fasttop)" or (less often) "malloc_consolidate(): invalid
chunk size".
To be clear, my expectation here is not for the problematic clips to
have useful content, or even to play back; just that vlc didn't crash.
(Totem for instance does not seem to crash with the same files.)
I'll attach logs for both the double free and malloc_consolidate cases
(which I'm producing by running LC_ALL=C vlc -vvv out.mp4 in a loop).
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: vlc 3.0.3-1-1ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 20 18:14:25 2018
InstallationDate: Installed on 2016-10-13 (737 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fi_FI.UTF-8
SHELL=/bin/bash
SourcePackage: vlc
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: vlc (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
** Attachment added: "short example mp4 file to reproduce the crash"
https://bugs.launchpad.net/bugs/1798973/+attachment/5203358/+files/out.mp4
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https://bugs.launchpad.net/bugs/1798973
Title:
Crashes with "double free" or "invalid chunk size" with some mp4 files
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