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qtdemux: prevent buffer flow if any stream failed to be exposed

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In some cases the stream configuration can fail, for instance if the
stream is protected and no decryptor was found. For those situations
the demuxer shouldn't emit any data on the corresponding source pad of
the stream and bail out.

https://bugzilla.gnome.org/show_bug.cgi?id=762516
This commit is contained in:
Philippe Normand 2016-02-24 11:28:09 +01:00 committed by Sebastian Dröge
parent fb5d50cd07
commit 67f3fc1748
1 changed files with 29 additions and 6 deletions
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35
gst/isomp4/qtdemux.c
View file

@ -7145,6 +7145,7 @@ static gboolean
gst_qtdemux_add_stream (GstQTDemux * qtdemux,
QtDemuxStream * stream, GstTagList * list)
{
gboolean ret = TRUE;
/* consistent default for push based mode */
gst_segment_init (&stream->segment, GST_FORMAT_TIME);
@ -7155,7 +7156,13 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
gst_pad_new_from_static_template (&gst_qtdemux_videosrc_template, name);
g_free (name);
gst_qtdemux_configure_stream (qtdemux, stream);
if (!gst_qtdemux_configure_stream (qtdemux, stream)) {
gst_object_unref (stream->pad);
stream->pad = NULL;
ret = FALSE;
goto done;
}
qtdemux->n_video_streams++;
} else if (stream->subtype == FOURCC_soun) {
gchar *name = g_strdup_printf ("audio_%u", qtdemux->n_audio_streams);
@ -7163,7 +7170,12 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
stream->pad =
gst_pad_new_from_static_template (&gst_qtdemux_audiosrc_template, name);
g_free (name);
gst_qtdemux_configure_stream (qtdemux, stream);
if (!gst_qtdemux_configure_stream (qtdemux, stream)) {
gst_object_unref (stream->pad);
stream->pad = NULL;
ret = FALSE;
goto done;
}
qtdemux->n_audio_streams++;
} else if (stream->subtype == FOURCC_strm) {
GST_DEBUG_OBJECT (qtdemux, "stream type, not creating pad");
@ -7174,7 +7186,12 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
stream->pad =
gst_pad_new_from_static_template (&gst_qtdemux_subsrc_template, name);
g_free (name);
gst_qtdemux_configure_stream (qtdemux, stream);
if (!gst_qtdemux_configure_stream (qtdemux, stream)) {
gst_object_unref (stream->pad);
stream->pad = NULL;
ret = FALSE;
goto done;
}
qtdemux->n_sub_streams++;
} else if (stream->caps) {
gchar *name = g_strdup_printf ("video_%u", qtdemux->n_video_streams);
@ -7182,7 +7199,12 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
stream->pad =
gst_pad_new_from_static_template (&gst_qtdemux_videosrc_template, name);
g_free (name);
gst_qtdemux_configure_stream (qtdemux, stream);
if (!gst_qtdemux_configure_stream (qtdemux, stream)) {
gst_object_unref (stream->pad);
stream->pad = NULL;
ret = FALSE;
goto done;
}
qtdemux->n_video_streams++;
} else {
GST_DEBUG_OBJECT (qtdemux, "unknown stream type");
@ -7211,7 +7233,7 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
done:
if (list)
gst_tag_list_unref (list);
return TRUE;
return ret;
}
/* find next atom with @fourcc starting at @offset */
@ -10606,7 +10628,8 @@ qtdemux_expose_streams (GstQTDemux * qtdemux)
stream->pending_tags = NULL;
if (oldpad)
oldpads = g_slist_prepend (oldpads, oldpad);
gst_qtdemux_add_stream (qtdemux, stream, list);
if (!gst_qtdemux_add_stream (qtdemux, stream, list))
return GST_FLOW_ERROR;
}
gst_qtdemux_guess_bitrate (qtdemux);