avcodec/mpeg12dec: check for overread in mpeg1_fast_decode_block_inter()

No speedloss meassured Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · 0a59055167
parent 746350ea0f
commit 0a59055167
1 changed files with 1 additions and 1 deletions
--- 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);
        }