File ImageMagick-CVE-2017-11524.patch of Package ImageMagick.8768
--- a/magick/blob.c
+++ b/magick/blob.c
@@ -4436,11 +4436,11 @@ MagickExport ssize_t WriteBlob(Image *image,const size_t length,
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
- assert(data != (const unsigned char *) NULL);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
if (length == 0)
return(0);
+ assert(data != (const unsigned char *) NULL);
count=0;
p=data;
switch (image->blob->type)