--- pixman/pixman-bits-image.c.old	2013-09-06 10:10:45.660258660 +0200
+++ pixman/pixman-bits-image.c	2013-09-06 10:10:55.610258786 +0200
@@ -1695,7 +1695,7 @@ create_bits (pixman_format_code_t format
     if (_pixman_multiply_overflows_size (height, stride))
 	return NULL;
 
-    buf_size = height * stride;
+    buf_size = (size_t)height * stride;
 
     if (rowstride_bytes)
 	*rowstride_bytes = stride;