[Bug 654604] New: Ring buffer race conition while activating causes critical

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=654604
  GStreamer | gst-plugins-base | git

           Summary: Ring buffer race conition while activating causes
                    critical
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: vincent.penquerch at collabora.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=191948)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=191948)
log excerpt showing the two threads sliced at an inopportune time

This seems to be a rare race condition, where a thread acquires a device, then
another releases it, leaving the original thread left with a released device
when it gets to using it.

I got it to happen twice when starting a call with meego-app-im and cancelling
it quickly.

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