From: Cristy <urban-warrior@imagemagick.org>
Date: Tue, 18 Jun 2019 15:57:54 +0000 (-0400)
Subject: https://github.com/ImageMagick/ImageMagick/issues/1602
X-Git-Tag: 7.0.8-50~31
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=fe5f4b85e6b1b54d3b4588a77133c06ade46d891;p=imagemagick

https://github.com/ImageMagick/ImageMagick/issues/1602
---

diff --git a/coders/tiff.c b/coders/tiff.c
index 7efbb970b..97402f2cb 100644
--- a/coders/tiff.c
+++ b/coders/tiff.c
@@ -258,6 +258,12 @@ static MagickOffsetType TIFFSeekCustomStream(const MagickOffsetType offset,
     }
     case SEEK_CUR:
     {
+      if (((offset > 0) && (profile->offset > (SSIZE_MAX-offset))) ||
+          ((offset < 0) && (profile->offset < (-SSIZE_MAX-offset))))
+        {
+          errno=EOVERFLOW;
+          return(-1);
+        }
       if ((profile->offset+offset) < 0)
         return(-1);
       profile->offset+=offset;