else if (incl < 0)
return incl;
- if (!cblk->npasses)
- cblk->nonzerobits = expn[bandno] + numgbits - 1 -
- tag_tree_decode(s, prec->zerobits + cblkno,
- 100);
+ if (!cblk->npasses) {
+ int v = expn[bandno] + numgbits - 1 -
+ tag_tree_decode(s, prec->zerobits + cblkno, 100);
+ if (v < 0) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "nonzerobits %d invalid\n", v);
+ return AVERROR_INVALIDDATA;
+ }
+ cblk->nonzerobits = v;
+ }
if ((newpasses = getnpasses(s)) < 0)
return newpasses;
if ((llen = getlblockinc(s)) < 0)