[Bug 759547] dashdemux: insufficient validation of UTCtiming element

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=759547

Sebastian Dröge (slomo) <slomo at coaxion.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |slomo at coaxion.net
         Resolution|---                         |FIXED

--- Comment #2 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
commit b2e689890f046d9679932347e08648b4bc2f3d93
Author: Florin Apostol <florin.apostol at oregan.net>
Date:   Wed Dec 16 13:59:18 2015 +0000

    dashdemux: improve validation of UTCtiming element

    gst_mpdparser_parse_utctiming_node does not validate the parsed values
completely. The following scenarios are incorrectly accepted:
    - elements with no schemeIdUri property should be rejected
    - elements with unrecognized UTCTiming scheme should be rejected
    - elements with empty values should be rejected

    The last one triggers a division by 0 in gst_dash_demux_poll_clock_drift:
    clock_drift->selected_url = clock_drift->selected_url % g_strv_length
(urls);
    because it urls is a valid pointer to an empty array.

    https://bugzilla.gnome.org/show_bug.cgi?id=759547

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