svq3: protect against negative quantizers.
authorRonald S. Bultje <rsbultje@gmail.com>
Tue, 6 Mar 2012 01:03:32 +0000 (17:03 -0800)
committerReinhard Tartler <siretart@tauware.de>
Thu, 8 Mar 2012 21:07:55 +0000 (22:07 +0100)
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit 11b940a1a8e7e5d5b212935a3ce78aeda577f5f2)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
libavcodec/svq3.c

index eeb8ed7..49ca456 100644 (file)
@@ -651,7 +651,7 @@ 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;
         }