File 0003-Fix-for-CVE-2017-5852-with-added-error-code.patch of Package podofo

Subject: Fix for CVE-2017-5852 with added error code
Url: https://sourceforge.net/p/podofo/code/1835/

--- a/podofo/trunk/src/base/PdfError.cpp
+++ b/podofo/trunk/src/base/PdfError.cpp
@@ -222,6 +222,9 @@
         case ePdfError_InvalidEnumValue:
             pszMsg = "ePdfError_InvalidEnumValue";
             break;
+        case ePdfError_BrokenFile:
+            pszMsg = "ePdfError_BrokenFile";
+            break;
         case ePdfError_PageNotFound:
             pszMsg = "ePdfError_PageNotFound";
             break;
@@ -396,6 +399,9 @@
             break;
         case ePdfError_InvalidEnumValue:
             pszMsg = "An invalid enum value was specified.";
+            break;
+        case ePdfError_BrokenFile:
+            pszMsg = "The file content is broken.";
             break;
         case ePdfError_PageNotFound:
             pszMsg = "The requested page could not be found in the PDF.";
--- a/podofo/trunk/src/base/PdfError.h
+++ b/podofo/trunk/src/base/PdfError.h
@@ -73,6 +73,7 @@
     ePdfError_ValueOutOfRange,          /**< The specified memory is out of the allowed range. */
     ePdfError_InternalLogic,            /**< An internal sanity check or assertion failed. */ 
     ePdfError_InvalidEnumValue,         /**< An invalid enum value was specified. */
+    ePdfError_BrokenFile,               /**< The file content is broken. */
 
     ePdfError_PageNotFound,             /**< The requested page could not be found in the PDF. */
 
--- a/podofo/trunk/src/doc/PdfPage.cpp
+++ b/podofo/trunk/src/doc/PdfPage.cpp
@@ -228,6 +228,14 @@
     if( inObject->GetDictionary().HasKey( "Parent" ) ) 
     {
         pObj = inObject->GetIndirectKey( "Parent" );
+        if( pObj == inObject )
+        {
+            std::ostringstream oss;
+            oss << "Object " << inObject->Reference().ObjectNumber() << " "
+                << inObject->Reference().GenerationNumber() << " references itself as Parent";
+            PODOFO_RAISE_ERROR_INFO( ePdfError_BrokenFile, oss.str().c_str() );
+        }
+
         if( pObj )
             pObj = GetInheritedKeyFromObject( inKey, pObj );
     }