From: cristy <urban-warrior@git.imagemagick.org>
Date: Sat, 20 Jun 2015 15:31:17 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~879
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3bb57969bbed49198dee0088e893afc5355b6209;p=imagemagick

---

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index dbc0b0367..cfdeec9bb 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -3717,6 +3717,8 @@ MagickExport MagickOffsetType SeekBlob(Image *image,
       return(-1);
     case FileStream:
     {
+      if ((offset < 0) && (whence == SEEK_SET))
+        return(-1);
       if (fseek(image->blob->file_info.file,offset,whence) < 0)
         return(-1);
       image->blob->offset=TellBlob(image);