--- old/src/java.desktop/unix/native/libawt_xawt/awt/multiVis.c	2019-09-19 16:57:27.000000000 +0100
+++ new/src/java.desktop/unix/native/libawt_xawt/awt/multiVis.c	2019-09-19 16:57:26.000000000 +0100
@@ -218,7 +218,11 @@
      XColor *colors ;
 
      ncolors = (unsigned) src_vis->map_entries ;
-     *src_colors = colors = (XColor *)malloc(ncolors * sizeof(XColor) ) ;
+/* JDK modification.
+ * use calloc instead of malloc to initialize allocated memory
+ *   *src_colors = colors = (XColor *)malloc(ncolors * sizeof(XColor) ) ;
+ */
+     *src_colors = colors = (XColor *)calloc(ncolors, sizeof(XColor));
 
      if(src_vis->class != TrueColor && src_vis->class != DirectColor)
      {