From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 16 Mar 2018 16:05:31 +0000 (-0400)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6898
X-Git-Tag: 7.0.7-27~36
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9e3bc6c8ff29b8b0b52bfdb8ac9369f1cb6eefba;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6898
---

diff --git a/coders/wpg.c b/coders/wpg.c
index 8b7b09039..749eee924 100644
--- a/coders/wpg.c
+++ b/coders/wpg.c
@@ -1222,13 +1222,13 @@ static Image *ReadWPGImage(const ImageInfo *image_info,
                         image->colormap[1].blue = QuantumRange;
                     }
                 }
-
-              if(UnpackWPGRaster(image,bpp,exception) < 0)
-                /* The raster cannot be unpacked */
-                {
-                DecompressionFailed:
-                  ThrowReaderException(CoderError,"UnableToDecompressImage");
-                    }
+              if(!image_info->ping)
+                if(UnpackWPGRaster(image,bpp,exception) < 0)
+                  /* The raster cannot be unpacked */
+                  {
+                  DecompressionFailed:
+                    ThrowReaderException(CoderError,"UnableToDecompressImage");
+                  }
 
               if(Rec.RecType==0x14 && BitmapHeader2.RotAngle!=0 && !image_info->ping)
                 {