From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 29 Dec 2017 00:55:30 +0000 (-0500)
Subject: Exit early on bad file descriptor
X-Git-Tag: 7.0.7-19~10
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=eacbdd623be13633c083fd2831eeb79e5381e089;p=imagemagick

Exit early on bad file descriptor
---

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index f6a7384e1..917fc0bdc 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -3108,6 +3108,11 @@ MagickExport MagickBooleanType OpenBlob(const ImageInfo *image_info,
       *fileMode =(*type);
       fileMode[1]='\0';
       blob_info->file_info.file=fdopen(StringToLong(filename+3),fileMode);
+      if (blob_info->file_info.file == (FILE *) NULL)
+        {
+          ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
+          return(MagickFalse);
+        }
 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
       if (strchr(type,'b') != (char *) NULL)
         setmode(fileno(blob_info->file_info.file),_O_BINARY);