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wavparse: clip chunk length to available data (when known)

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This prevents silly chunk lengths from possibly overflowing
(at least when we know the actual data length).

https://bugzilla.gnome.org/show_bug.cgi?id=722567
This commit is contained in:
Vincent Penquerc'h 2015-03-20 09:07:35 +00:00
parent bf95f93c01
commit 3ac119bbe2
1 changed files with 8 additions and 2 deletions
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10
gst/wavparse/gstwavparse.c
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@ -1261,8 +1261,14 @@ gst_wavparse_stream_headers (GstWavParse * wav)
}
GST_INFO_OBJECT (wav,
"Got TAG: %" GST_FOURCC_FORMAT ", offset %" G_GUINT64_FORMAT,
GST_FOURCC_ARGS (tag), wav->offset);
"Got TAG: %" GST_FOURCC_FORMAT ", offset %" G_GUINT64_FORMAT ", size %"
G_GUINT32_FORMAT, GST_FOURCC_ARGS (tag), wav->offset, size);
/* Clip to upstream size if known */
if (wav->datasize > 0 && size + wav->offset > wav->datasize) {
GST_WARNING_OBJECT (wav, "Clipping chunk size to file size");
size = wav->datasize - wav->offset;
}
/* wav is a st00pid format, we don't know for sure where data starts.
* So we have to go bit by bit until we find the 'data' header