From: cristy <urban-warrior@git.imagemagick.org>
Date: Sat, 2 May 2015 21:12:52 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~1076
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e4ec2a105a7ccde449a4de175ba5e1c6dd757d73;p=imagemagick

---

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index 8b9e6d366..c2a1b9028 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -125,6 +125,7 @@ struct _BlobInfo
 
   MagickBooleanType
     exempt,
+    immutable,
     synchronize,
     status,
     temporary;
@@ -453,6 +454,7 @@ MagickExport BlobInfo *CloneBlobInfo(const BlobInfo *blob_info)
   clone_info->offset=blob_info->offset;
   clone_info->size=blob_info->size;
   clone_info->exempt=blob_info->exempt;
+  clone_info->immutable=blob_info->immutable;
   clone_info->status=blob_info->status;
   clone_info->temporary=blob_info->temporary;
   clone_info->type=blob_info->type;
@@ -692,6 +694,7 @@ MagickExport void *DetachBlob(BlobInfo *blob_info)
   blob_info->offset=0;
   blob_info->eof=MagickFalse;
   blob_info->exempt=MagickFalse;
+  blob_info->immutable=MagickFalse;
   blob_info->type=UndefinedStream;
   blob_info->file_info.file=(FILE *) NULL;
   data=blob_info->data;
@@ -2407,6 +2410,7 @@ MagickExport MagickBooleanType OpenBlob(const ImageInfo *image_info,
     {
       if (image_info->stream != (StreamHandler) NULL)
         image->blob->stream=(StreamHandler) image_info->stream;
+      image->immutable=MagickTrue;
       AttachBlob(image->blob,image_info->blob,image_info->length);
       return(MagickTrue);
     }
@@ -3767,7 +3771,8 @@ MagickExport MagickOffsetType SeekBlob(Image *image,
           image->blob->eof=MagickFalse;
           break;
         }
-      if (image->blob->mapped != MagickFalse)
+      if ((image->blob->mapped != MagickFalse) &&
+          (image->blob->immutable != MagickFalse))
         {
           image->blob->eof=MagickTrue;
           return(-1);