[FFmpeg-cvslog] avcodec/mpeg12dec: check for overread in mpeg1_fast_decode_block_inter()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Jan 24 16:46:43 2014 +0100| [0a59055167eea3087a36d9091501d3bb52ed8ebe] | committer: Michael Niedermayer

avcodec/mpeg12dec: check for overread in mpeg1_fast_decode_block_inter()

No speedloss meassured

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0a59055167eea3087a36d9091501d3bb52ed8ebe
---

 libavcodec/mpeg12dec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 91346bf..a4ff5d6 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -335,7 +335,7 @@ static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, int16_t *bloc
             }
 
             block[j] = level;
-            if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+            if (((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF || i >= 64)
                 break;
             UPDATE_CACHE(re, &s->gb);
         }