https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7535

diff --git a/MagickCore/draw.c b/MagickCore/draw.c
index 54f173e19d09cb8184e29ee5a9ed490c92a50c33..ae8eece7412b5200b20de7373c0cad1366fbb744 100644 (file)
--- a/MagickCore/draw.c
+++ b/MagickCore/draw.c
@@ -1531,7 +1531,7 @@ 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+6UL)+6UL),sizeof(*dash_polygon));
+    (2UL*number_vertices+32UL),sizeof(*dash_polygon));
   if (dash_polygon == (PrimitiveInfo *) NULL)
     return(MagickFalse);
   clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);