From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 13 Jan 2018 14:58:46 +0000 (-0500)
Subject: Return if the image does not have an associated blob
X-Git-Tag: 7.0.7-22~96
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7505482115a172466bed500482d00d4ac8cd5c83;p=imagemagick

Return if the image does not have an associated blob
---

diff --git a/MagickCore/compress.c b/MagickCore/compress.c
index 4ec95a6e5..33160220f 100644
--- a/MagickCore/compress.c
+++ b/MagickCore/compress.c
@@ -449,6 +449,8 @@ MagickExport MagickBooleanType HuffmanDecodeImage(Image *image,
   assert(image->signature == MagickCoreSignature);
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
+  if (image->blob == (BlobInfo *) NULL)
+    ThrowBinaryException(BlobError,"UnableToOpenBlob",image->filename);
   mb_hash=(HuffmanTable **) AcquireQuantumMemory(HashSize,sizeof(*mb_hash));
   mw_hash=(HuffmanTable **) AcquireQuantumMemory(HashSize,sizeof(*mw_hash));
   scanline=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,