commit d27726f2b29f1588b1cd0037ca20cd365d716824
author Cristy <urban-warrior@imagemagick.org> Thu Jul 19 16:05:57 2018 -0400
committer Cristy <urban-warrior@imagemagick.org> Thu Jul 19 16:05:57 2018 -0400
tree 97304b0092592a26355eb52fbcbc763f615e3320
parent 889476accfe650fb93981772fd47aa76b5723c21

...

coders/mvg.c

diff --git a/coders/mvg.c b/coders/mvg.c
index 55afec6..53e8209 100644
--- a/coders/mvg.c
+++ b/coders/mvg.c
@@ -211,13 +211,20 @@
     draw_info->primitive=FileToString(image->filename,~0UL,exception);
   else
     {
-      draw_info->primitive=(char *) AcquireMagickMemory(GetBlobSize(image)+1);
-      if (draw_info->primitive != (char *) NULL)
+      MagickSizeType
+        length;
+
+      length=GetBlobSize(image);
+      if (length == (MagickSizeType) ((size_t) length))
         {
-          memcpy(draw_info->primitive,GetBlobStreamData(image),
-            GetBlobSize(image));
-          draw_info->primitive[GetBlobSize(image)]='\0';
-        }
+          draw_info->primitive=(char *) AcquireMagickMemory((size_t) length+1);
+          if (draw_info->primitive != (char *) NULL)
+            {
+              memcpy(draw_info->primitive,GetBlobStreamData(image),(size_t)
+                length);
+              draw_info->primitive[length]='\0';
+            }
+         }
      }
   if (draw_info->primitive == (char *) NULL)
     {