[Bug 737886] New: [PATCH] crash when changing equalizer settings during playback

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=737886
  GStreamer | gst-plugins-good | git

           Summary: [PATCH] crash when changing equalizer settings during
                    playback
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: me at davidsansome.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Reported by a Clementine user:
https://github.com/clementine-player/Clementine/issues/4541

The problem is the gst_buffer_map (buf, &map, GST_MAP_READWRITE) in
gstiirequalizer.c - it's just switched out of passthrough mode, but the buffer
was allocated while the transform was still in passthrough mode and it's
read-only (GstBaseTransform just gives it a copy of the input buffer as an
optimisation).  It'll be writeable on the next call to transform_ip.

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