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matroska: Add size checks to the parsing of FLAC headers

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This commit is contained in:
Sebastian Dröge 2016-11-22 20:01:20 +02:00
parent fec77de8cb
commit c0da05df38
1 changed files with 6 additions and 3 deletions
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9
gst/matroska/matroska-ids.c
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@ -283,15 +283,18 @@ gst_matroska_parse_flac_stream_headers (gpointer codec_data,
/* skip fLaC marker */
off = 4;
/* FIXME: check size remaining */
while (off < codec_data_size) {
while (off < codec_data_size - 3) {
len = GST_READ_UINT8 (pdata + off + 1) << 16;
len |= GST_READ_UINT8 (pdata + off + 2) << 8;
len |= GST_READ_UINT8 (pdata + off + 3);
GST_DEBUG ("header packet: len=%u bytes, flags=0x%02x", len, pdata[off]);
/* FIXME: check size remaining */
if (off + len > codec_data_size) {
gst_buffer_list_unref (list);
return NULL;
}
hdr = gst_buffer_new_wrapped (g_memdup (pdata + off, len + 4), len + 4);
gst_buffer_list_add (list, hdr);