From: Cristy <urban-warrior@imagemagick.org>
Date: Sat, 17 Mar 2018 12:15:16 +0000 (-0400)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6983
X-Git-Tag: 7.0.7-27~15
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=73358ebfef494fed27d5351fef328dbe36583ef3;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6983
---

diff --git a/coders/wpg.c b/coders/wpg.c
index 9ea2b1780..2b16c7e12 100644
--- a/coders/wpg.c
+++ b/coders/wpg.c
@@ -589,8 +589,9 @@ static int UnpackWPG2Raster(Image *image,int bpp,ExceptionInfo *exception)
             }
           break;
         case 0x7E:
-          (void) FormatLocaleFile(stderr,
-            "\nUnsupported WPG token XOR, please report!");
+          if (y == 0)
+            (void) FormatLocaleFile(stderr,
+              "\nUnsupported WPG token XOR, please report!");
           XorMe=!XorMe;
           break;
         case 0x7F:
@@ -1434,8 +1435,9 @@ static Image *ReadWPGImage(const ImageInfo *image_info,
                   }
                 case 1:    /*RLE for WPG2 */
                   {
-                    if( UnpackWPG2Raster(image,bpp,exception) < 0)
-                      goto DecompressionFailed;
+                    if (!image->ping)
+                      if( UnpackWPG2Raster(image,bpp,exception) < 0)
+                        goto DecompressionFailed;
                     break;
                   }
                 }