From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 19 May 2018 18:45:48 +0000 (-0400)
Subject: ...
X-Git-Tag: 7.0.7-34~6
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0fc4c54c5490f2f3bdf8078e2340f44bed2fac6c;p=imagemagick

...
---

diff --git a/MagickCore/draw.c b/MagickCore/draw.c
index e6f3709d4..d7b835ebd 100644
--- a/MagickCore/draw.c
+++ b/MagickCore/draw.c
@@ -3273,7 +3273,7 @@ MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info,
                     continue;
                   break;
                 }
-                if ((size_t) (q-p-4+1) <= 0)
+                if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
                   {
                     status=MagickFalse;
                     break;