[FFmpeg-cvslog] Check for out of bounds writes in the Delphine Software International CIN decoder .

[Laurent Aimar]

ffmpeg | branch: release/0.8 | Laurent Aimar <fenrir at videolan.org> | Fri Sep 30 00:05:51 2011 +0200| [6e774cf67e6f30feb9b3dec11713d6b6dc0b521c] | committer: Michael Niedermayer

Check for out of bounds writes in the Delphine Software International CIN decoder.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 3035c4034b6af3ad47f921e3385196e1b9d44ddf)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6e774cf67e6f30feb9b3dec11713d6b6dc0b521c
---

 libavcodec/dsicinav.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
index c33b3ed..faca821 100644
--- a/libavcodec/dsicinav.c
+++ b/libavcodec/dsicinav.c
@@ -220,6 +220,8 @@ static int cinvideo_decode_frame(AVCodecContext *avctx,
     if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
         return AVERROR_INVALIDDATA;
     if (palette_type == 0) {
+        if (palette_colors_count > 256)
+            return AVERROR_INVALIDDATA;
         for (i = 0; i < palette_colors_count; ++i) {
             cin->palette[i] = bytestream_get_le24(&buf);
             bitmap_frame_size -= 3;