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avidemux: verify size of INFO LIST to satisfy subsequent expectations

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This commit is contained in:
Mark Nauwelaerts 2009-08-04 11:32:27 +02:00
parent f4f8e8532c
commit 42bc085d95
1 changed files with 16 additions and 4 deletions
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20
gst/avi/gstavidemux.c
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@ -3019,13 +3019,19 @@ gst_avi_demux_stream_header_push (GstAviDemux * avi)
case GST_RIFF_LIST_INFO:
GST_DEBUG ("Found INFO chunk");
if (gst_avi_demux_peek_chunk (avi, &tag, &size)) {
GST_DEBUG ("got size %d", size);
avi->offset += 12;
gst_adapter_flush (avi->adapter, 12);
buf = gst_adapter_take_buffer (avi->adapter, size - 4);
gst_riff_parse_info (GST_ELEMENT (avi), buf, &avi->globaltags);
gst_buffer_unref (buf);
if (size > 4) {
buf = gst_adapter_take_buffer (avi->adapter, size - 4);
gst_riff_parse_info (GST_ELEMENT (avi), buf,
&avi->globaltags);
gst_buffer_unref (buf);
avi->offset += ((size + 1) & ~1) - 4;
avi->offset += ((size + 1) & ~1) - 4;
} else {
GST_DEBUG ("skipping INFO LIST prefix");
}
} else {
/* Need more data */
return GST_FLOW_OK;
@ -3319,6 +3325,12 @@ gst_avi_demux_stream_header_pull (GstAviDemux * avi)
goto pull_range_failed;
}
GST_DEBUG ("got size %u", GST_BUFFER_SIZE (buf));
if (size < 4) {
GST_DEBUG ("skipping INFO LIST prefix");
avi->offset += (4 - GST_ROUND_UP_2 (size));
gst_buffer_unref (buf);
continue;
}
sub = gst_buffer_create_sub (buf, 4, GST_BUFFER_SIZE (buf) - 4);
gst_riff_parse_info (element, sub, &avi->globaltags);