avcodec/mpc8: check for overread earlier and abort decoding frame

Signed-off-by: Paul B Mahol <onemda@gmail.com>
7 years ago · cc40228255
parent 11f8f9547d
commit cc40228255
1 changed files with 5 additions and 0 deletions
--- a/libavcodec/mpc8.c
+++ b/libavcodec/mpc8.c
@ -273,6 +273,11 @@ static int mpc8_decode_frame(AVCodecContext * avctx, void *data,
        if(maxband > 32) maxband -= 33;
    }

+    if (get_bits_left(gb) < 0) {
+        *got_frame_ptr = 0;
+        return buf_size;
+    }
+
    if(maxband > c->maxbands + 1) {
        av_log(avctx, AV_LOG_ERROR, "maxband %d too large\n",maxband);
        return AVERROR_INVALIDDATA;