From: cristy <urban-warrior@git.imagemagick.org>
Date: Sat, 15 Jun 2013 00:41:21 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~3595
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ac1caa2006ba43a19dd25d3ad0db999f7b8eac16;p=imagemagick

---

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index edcd980af..1f925a348 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -2570,6 +2570,7 @@ MagickExport MagickBooleanType OpenBlob(const ImageInfo *image_info,
                 length=(size_t) properties->st_size;
                 if ((magick_info != (const MagickInfo *) NULL) &&
                     (GetMagickBlobSupport(magick_info) != MagickFalse) &&
+                    (length > MagickMaxBufferExtent) &&
                     (AcquireMagickResource(MapResource,length) != MagickFalse))
                   {
                     void
@@ -3821,11 +3822,11 @@ MagickPrivate MagickBooleanType SetBlobExtent(Image *image,
           offset=SeekBlob(image,offset,SEEK_SET);
           if (count != 1)
             return(MagickFalse);
+          (void) AcquireMagickResource(MapResource,extent);
           image->blob->data=(unsigned char*) MapBlob(fileno(
             image->blob->file_info.file),WriteMode,0,(size_t) extent);
           image->blob->extent=(size_t) extent;
           image->blob->length=(size_t) extent;
-          (void) AcquireMagickResource(MapResource,extent);
           (void) SyncBlob(image);
           break;
         }