From b7144222df85ff22f286041559bb6a293a5b4ecc Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Sun, 18 May 2014 21:09:22 +0000
Subject: [PATCH]

---
 MagickCore/blob.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index 91d04cb51..cbcae1bd5 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -3602,6 +3602,8 @@ MagickExport MagickOffsetType SeekBlob(Image *image,
       return(-1);
     case FileStream:
     {
+      if ((whence == SEEK_SET) && (offset < 0))
+        return(-1);
       if (fseek(image->blob->file_info.file,offset,whence) < 0)
         return(-1);
       image->blob->offset=TellBlob(image);
-- 
2.40.0