tracker-extract crashed with SIGSEGV in gst_video_info_to_caps()

[MMALAIDURAI]

i need

ProblemType: Crash
DistroRelease: Ubuntu 15.10
Package: tracker-extract 1.4.1-1ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2
Uname: Linux 4.2.0-14-generic i686
ApportVersion: 2.19-0ubuntu1
Architecture: i386
CurrentDesktop: Unity
Date: Thu Oct 8 16:04:40 2015
ExecutablePath: /usr/lib/tracker/tracker-extract
InstallationDate: Installed on 2015-09-13 (25 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
ProcCmdline: /usr/lib/tracker/tracker-extract
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xad14eb08 <gst_video_info_to_caps+40>: mov (%eax),%eax
 PC (0xad14eb08) ok
 source "(%eax)" (0x0000007c) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: tracker
StacktraceTop:
 gst_video_info_to_caps () from /usr/lib/i386-linux-gnu/libgstvideo-1.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstlibav.so
 ?? () from /usr/lib/i386-linux-gnu/libavcodec-ffmpeg.so.56
 ?? () from /usr/lib/i386-linux-gnu/libavcodec-ffmpeg.so.56
 avcodec_decode_video2 () from /usr/lib/i386-linux-gnu/libavcodec-ffmpeg.so.56
Title: tracker-extract crashed with SIGSEGV in gst_video_info_to_caps()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 gst_video_info_to_caps (info=0xadaf4bdc) at video-info.c:509
 gst_ffmpegviddec_ensure_internal_pool (picture=0x8c15b20, ffmpegdec=0x8a4e520) at gstavviddec.c:719
 gst_ffmpegviddec_get_buffer2 (context=0x8c1a420, picture=0x8c15b20, flags=0) at gstavviddec.c:801
 get_buffer_internal (flags=0, frame=0x8c15b20, avctx=0x8c1a420) at /build/ffmpeg-1x9OvV/ffmpeg-2.7.2/libavcodec/utils.c:1026
 ff_get_buffer (avctx=0x8c1a420, frame=0x8c15b20, flags=0) at /build/ffmpeg-1x9OvV/ffmpeg-2.7.2/libavcodec/utils.c:1039

[Seth Arnold (seth-arnold)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[the_mechanical (mechanical)]

Still there in 16.10 Beta (Yaketty Yak)

[Rohith (rohithjyo)]

Still there in 16.04 LTS (Xenial Xerex)

[Lucas (lucasvam)]

Still there for me too in 16.10 Official Release (Yaketty Yak)

[Dave Shilson (daveshilson)]

+10 users affected here (16.04 LTS)

[Folkert (folkert-meeuw-n)]

Me too. And had an update on relevant security packages (16.04 LTS upgrade from 14.04 TLS)

[Glenn Brauen (glenn-q)]

I've had this start-up crash since upgrading to 16.04 LTS. Finally purged tracker-extract and this seems not to cause problems. Indexer already crashed on start-up every time so file search was useless anyway (find/grep in a terminal has always been reliable).

Can't purge tracker because of the dependencies (gnome-desktop) but taking out tracker-extract seems OK.

[Roger James (rogerjames99)]

Also happening in 17.04. Started happening after a fsck repair following a power failure. Could be related to lost/corrupt files.

Running tracker-extract manually on file shown in syslog gives the following.

roger@dragon:~/Documents/Old Stuff/Camtasia Studio$ tracker extract --verbosity=detailed visualimpact.avi
Tracker-Message: Starting tracker-extract 1.12.0
Tracker-Message: General options:
Tracker-Message: Verbosity ............................ 2
Tracker-Message: Sched Idle ........................... 1
Tracker-Message: Max bytes (per file) ................. 1048576
Setting priority nice level to 19
Loading extractor rules... (/usr/share/tracker/extract-rules)
Extractor rules loaded
MIME type guessed as 'video/x-msvideo' (from GIO)
gst_video_info_set_format: assertion 'format != GST_VIDEO_FORMAT_UNKNOWN' failed
gst_video_info_to_caps: assertion 'info->finfo->format != GST_VIDEO_FORMAT_UNKNOWN' failed

(tracker-extract:5311): GStreamer-CRITICAL **: gst_mini_object_unref: assertion 'mini_object != NULL' failed
Call to gst_discoverer_discover_uri(file:///home/roger/Documents/Old%20Stuff/Camtasia%20Studio/visualimpact.avi) failed: Unable to allocate memory
file:///home/roger/Documents/Old%20Stuff/Camtasia%20Studio/visualimpact.avi: No metadata or extractor modules found to handle this file

There is an interesting comment in the man page for tracker-extract.

"The actual extraction is done by a separate process. This is done to isolate the calling process from any memory leaks or crashes in the libraries Tracker uses to extract metadata."

[Roger James (rogerjames99)]

My workaround for ubuntu setups. Is to put a file called .trackerignore in any directories that contain avi files. The default configuration for tracker appears to set this.

gsettings get org.freedesktop.Tracker.Miner.Files ignored-directories-with-content
['.git', '.trackerignore']

The bug itself needs to be (re)raised with gnome.

[Roger James (rogerjames99)]

I have raised this on Gnome Bugzilla. Bug number #787645.

[Craig (craig-st)]

Looks like this bug should be reported on Gitlab rather than Gnome Bugzilla. There are several tracker subprojects on Gitlab. I'm guessing this bug should be reported on one of:

https://gitlab.gnome.org/GNOME/tracker-miners
or,
https://gitlab.gnome.org/GNOME/tracker