https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7078

diff --git a/MagickCore/draw.c b/MagickCore/draw.c
index 811ff6da71f4647405db6a6dda5eeda8b9227f99..34cbdf6e5c5a585a9a915d6e1a711ecc729cf115 100644 (file)
--- a/MagickCore/draw.c
+++ b/MagickCore/draw.c
@@ -1521,7 +1521,7 @@ static MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
   for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
   number_vertices=(size_t) i;
   dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
-    (2UL*(number_vertices+3UL)+3UL),sizeof(*dash_polygon));
+    (2UL*(number_vertices+6UL)+6UL),sizeof(*dash_polygon));
   if (dash_polygon == (PrimitiveInfo *) NULL)
     return(MagickFalse);
   clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);