From a4642512df99b296d289b4089c18455d772820d0 Mon Sep 17 00:00:00 2001
From: Cristy <mikayla-grace@urban-warrior.org>
Date: Mon, 11 Feb 2019 19:58:52 -0500
Subject: [PATCH] =?utf8?q?Heap=20buffer-overflow=20when=20processing=20a?=
 =?utf8?q?=20SVG=20image=20including=20a=20broken=20comment=20like=20"/*"?=
 =?utf8?q?=20in=20an=20attribute=20value=20(credit=20Nicolas=20Gr=C3=A9goi?=
 =?utf8?q?re)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

---
 coders/svg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/coders/svg.c b/coders/svg.c
index cd2085378..0663f715e 100644
--- a/coders/svg.c
+++ b/coders/svg.c
@@ -678,12 +678,12 @@ static void SVGStripString(const MagickBooleanType trim,char *message)
     *q++=(*p);
   }
   *q='\0';
-  if (trim != MagickFalse)
+  length=strlen(message);
+  if ((trim != MagickFalse) && (length != 0))
     {
       /*
         Remove whitespace.
       */
-      length=strlen(message);
       p=message;
       while (isspace((int) ((unsigned char) *p)) != 0)
         p++;
-- 
2.40.0