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oggparse: Make gst_ogg_parse_submit_buffer() safe

Browse source 
By not passing zero-sized buffers to ogg_sync_buffer()
and checking the return values of libogg functions.

Fixes bug #639136.
This commit is contained in:
Yang Xichuan 2011-01-11 15:10:42 +08:00 committed by Sebastian Dröge
parent 876bf233fb
commit cb9607632f
1 changed files with 23 additions and 11 deletions
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34
ext/ogg/gstoggparse.c
View file

@ -281,29 +281,41 @@ gst_ogg_parse_dispose (GObject * object)
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/* submit the given buffer to the ogg sync.
*
* Returns the number of bytes submited.
*/
static gint
/* submit the given buffer to the ogg sync */
static GstFlowReturn
gst_ogg_parse_submit_buffer (GstOggParse * ogg, GstBuffer * buffer)
{
guint size;
guint8 *data;
gchar *oggbuffer;
GstFlowReturn ret = GST_FLOW_OK;
size = GST_BUFFER_SIZE (buffer);
data = GST_BUFFER_DATA (buffer);
/* We now have a buffer, submit it to the ogg sync layer */
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
memcpy (oggbuffer, data, size);
ogg_sync_wrote (&ogg->sync, size);
GST_DEBUG_OBJECT (ogg, "submitting %u bytes", size);
if (G_UNLIKELY (size == 0))
goto done;
/* We've copied all the neccesary data, so we're done with the buffer */
oggbuffer = ogg_sync_buffer (&ogg->sync, size);
if (G_UNLIKELY (oggbuffer == NULL)) {
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("failed to get ogg sync buffer"));
ret = GST_FLOW_ERROR;
goto done;
}
memcpy (oggbuffer, data, size);
if (G_UNLIKELY (ogg_sync_wrote (&ogg->sync, size) < 0)) {
GST_ELEMENT_ERROR (ogg, STREAM, DECODE,
(NULL), ("failed to write %d bytes to the sync buffer", size));
ret = GST_FLOW_ERROR;
}
done:
gst_buffer_unref (buffer);
return size;
return ret;
}
static void