[FFmpeg-cvslog] indeo5: check quant_mat

[Michael Niedermayer]

ffmpeg | branch: release/0.11 | Michael Niedermayer <michaelni at gmx.at> | Thu May 31 05:01:28 2012 +0200| [ddb92c6df12748154e218a12c0aef6096341ad76] | committer: Michael Niedermayer

indeo5: check quant_mat

prevents out of array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 8aaa00c3012d425ce50efffadb813ad62d1ff3d5)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ddb92c6df12748154e218a12c0aef6096341ad76
---

 libavcodec/indeo5.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/indeo5.c b/libavcodec/indeo5.c
index 3c7242a..e989690 100644
--- a/libavcodec/indeo5.c
+++ b/libavcodec/indeo5.c
@@ -199,6 +199,10 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
             }
 
             if (band->blk_size == 8) {
+                if(quant_mat >= 5){
+                    av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
+                    return -1;
+                }
                 band->intra_base  = &ivi5_base_quant_8x8_intra[quant_mat][0];
                 band->inter_base  = &ivi5_base_quant_8x8_inter[quant_mat][0];
                 band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];