svq3: protect against negative quantizers.
authorRonald S. Bultje <rsbultje@gmail.com>
Tue, 6 Mar 2012 01:03:32 +0000 (17:03 -0800)
committerRonald S. Bultje <rsbultje@gmail.com>
Tue, 6 Mar 2012 18:47:42 +0000 (10:47 -0800)
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
libavcodec/svq3.c

index caafc49..99c1dec 100644 (file)
@@ -650,7 +650,7 @@ static int svq3_decode_mb(SVQ3Context *svq3, unsigned int mb_type)
     if (IS_INTRA16x16(mb_type) || (s->pict_type != AV_PICTURE_TYPE_I && s->adaptive_quant && cbp)) {
         s->qscale += svq3_get_se_golomb(&s->gb);
 
-        if (s->qscale > 31){
+        if (s->qscale > 31u){
             av_log(h->s.avctx, AV_LOG_ERROR, "qscale:%d\n", s->qscale);
             return -1;
         }