File ImageMagick-CVE-2019-17540.patch of Package ImageMagick.30956

Index: ImageMagick-6.8.8-1/coders/ps.c
===================================================================
--- ImageMagick-6.8.8-1.orig/coders/ps.c
+++ ImageMagick-6.8.8-1/coders/ps.c
@@ -572,9 +572,9 @@ static Image *ReadPSImage(const ImageInf
           Read Photoshop profile.
         */
         count=(ssize_t) sscanf(command,PhotoshopProfile " %lu",&extent);
-        if (count != 1)
+        if ((count != 1) || (extent == 0))
           continue;
-        length=extent;
+        length=(size_t) extent;
         if (length > GetBlobSize(image))
           ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
         profile=BlobToStringInfo((const void *) NULL,length);