desktop-packages team mailing list archive

[Launchpad Bug Tracker <1529445@xxxxxxxxxxxxxxxxxx>]

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

** Changed in: gst-plugins-base1.0 (Ubuntu)
       Status: New => Confirmed

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gstreamer1.0 in Ubuntu.
https://bugs.launchpad.net/bugs/1529445

Title:
  Several memory/file descriptor leaks in gstreamer 1.6.0

Status in gst-plugins-base1.0 package in Ubuntu:
  Confirmed
Status in gstreamer1.0 package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 15.10 includes gstreamer 1.6.0. There were several important
  leak fixes in 1.6.1, some of which also meant holding references to
  file descriptors around, which can result in crashes once the fd limit
  is hit.

  Upstream bugs:

  https://bugzilla.gnome.org/show_bug.cgi?id=755867
  https://bugzilla.gnome.org/show_bug.cgi?id=756552
  https://bugzilla.gnome.org/show_bug.cgi?id=756611

  All of these were fixed in 1.6.1

  What motivated me to investigate this bug is a 'random' crash in
  pidgin after several hours of leaking file descriptors, which looks
  exactly like bug #1479715 but happened even after applying that patch.
  Turns out that it wasn't pidgin holding the references that kept those
  file descriptors open, but it was gstreamer itself.

  I'd fill the whole SRU template here but i'm afraid there are too many
  patches that need to be applied to fix these bugs properly (some of
  them in gst-plugins-base, some of them in libgstreamer, and I don't
  know exactly which ones are needed) and anything less than updating to
  1.6.1 or 1.6.2 would be wrong, IMO. The whole 1.6.x branch is bugfixes
  only.

  [Test Case]

   * Download https://bugzilla.gnome.org/attachment.cgi?id=313241 to
  playbin-leak.c

   * Optionally change the "a.ogg" uri to a valid path to a sound in the
  local system (maybe "file:///usr/share/sounds/alsa/Noise.wav"). Some
  leaks and warnings appear anyway even without changing this.

   * Build with:

  gcc -Wall $(pkg-config --cflags gstreamer-1.0 gtk+-3.0 glib-2.0)
  playbin-leak.c $(pkg-config --libs gstreamer-1.0 gtk+-3.0 glib-2.0)

   * Run as:

  GOBJECT_DEBUG=instance-count GTK_DEBUG=interactive ./a.out

  * Let it run, see warnings after some iterations, watch it leak.

  Alternatively, how i've been testing this so far, which roughly
  imitates the pidgin crash (but probably only applies to a subset of
  the leaks)

   * Get a ubuntu 15.10 VM without sound card (so that pulseaudio fails
  to play sounds)

   * Do this:

  cd /usr/share/sounds/alsa
  valgrind --track-fds=yes gst-play-1.0 --audiosink=pulsesink Noise.wav Noise.wav Noise.wav

   * File descriptors open at exit should be 4, not 10 (it leaks two for
  each time it plays)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gst-plugins-base1.0/+bug/1529445/+subscriptions