[Bug 725134] hlsdemux null pointer deref if media playlist contains no media

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=725134
  GStreamer | gst-plugins-bad | git

Sebastian Dröge (slomo) <slomo> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|HEAD                        |1.3.1

--- Comment #9 from Sebastian Dröge (slomo) <slomo at coaxion.net> 2014-03-01 15:35:33 UTC ---
Thanks for updating the patch :)

commit b7ef52c515d9de53a08c450eef84492ba79796b3
Author: Alex Ashley <bugzilla at ashley-family.net>
Date:   Tue Feb 25 11:45:46 2014 +0000

    hlsdemux: Segfaults if playlist has no media files

    hlsdemux causes a null pointer dereference if the media playlist
    does not contain any media files. The gst_m3u8_client_get_duration
    function assumes that demux->client->current->files is valid when
    computing duration.

    gst_m3u8_client_update needed to be modified to check for the
    case of downloading an M3U8 file that doesn't contain any media
    files, and returning an error to gsthlsdemux.c

    This bug can be reproduced by creating a master m3u8 file that
    contains one media playlist that points back to the master m3u8
    file.  For example create a file called bug725134.m3u8:
      #EXTM3U
      #EXT-X-VERSION:4
      #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=1251135, CODECS="avc1.42001f
mp4a.40.2", RESOLUTIO
      bug725134.m3u8

    https://bugzilla.gnome.org/show_bug.cgi?id=725134

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