From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 2 Feb 2018 15:46:08 +0000 (-0500)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5638
X-Git-Tag: 7.0.7-23~189
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=337b11c3b483e51c35266c0790ef12e8ac1a0e94;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5638
---

diff --git a/MagickCore/token.c b/MagickCore/token.c
index 2f1bf4c53..cef1c00a8 100644
--- a/MagickCore/token.c
+++ b/MagickCore/token.c
@@ -309,8 +309,11 @@ MagickExport void GetNextToken(const char *start,const char **end,
       if (token[offset] == '#')
         offset++;
       i=(ssize_t) strlen(token);
-      (void) CopyMagickString(token,token+offset,MagickPathExtent);
-      token[i-offset-1]='\0';
+      if (i > offset)
+        {
+          (void) CopyMagickString(token,token+offset,MagickPathExtent);
+          token[i-offset-1]='\0';
+        }
     }
   while (isspace((int) ((unsigned char) *p)) != 0)
     p++;