1 files changed, 4 insertions, 7 deletions
diff --git a/kpdf/xpdf/xpdf/Stream.cc b/kpdf/xpdf/xpdf/Stream.cc
index ab630241..20219522 100644
--- a/kpdf/xpdf/xpdf/Stream.cc
+++ b/kpdf/xpdf/xpdf/Stream.cc
@@ -410,15 +410,12 @@ StreamPredictor::StreamPredictor(Stream *strA, int predictorA,
   ok = gFalse;
 
   nVals = width * nComps;
-  if (width <= 0 || nComps <= 0 || nBits <= 0 ||
-      nComps > gfxColorMaxComps || nBits > 16 ||
-      width >= INT_MAX / nComps ||
-      nVals >= (INT_MAX - 7) / nBits) {
-    return;
-  }
   pixBytes = (nComps * nBits + 7) >> 3;
   rowBytes = ((nVals * nBits + 7) >> 3) + pixBytes;
-  if (rowBytes <= 0) {
+  if (width <= 0 || nComps <= 0 || nBits <= 0 ||
+      nComps > gfxColorMaxComps || nBits > 16 ||
+      width >= INT_MAX / nComps ||      // check for overflow in nVals
+      nVals >= (INT_MAX - 7) / nBits) { // check for overflow in rowBytes
     return;
   }
   predLine = (Guchar *)gmalloc(rowBytes);