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XERCESC-2188 - Use-after-free on external DTD scan #54

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XERCESC-2188 - Use-after-free on external DTD scan #54

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6 changes: 2 additions & 4 deletions src/xercesc/internal/DGXMLScanner.cpp
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Expand Up @@ -1052,13 +1052,12 @@ void DGXMLScanner::scanDocTypeDecl()
DTDEntityDecl* declDTD = new (fMemoryManager) DTDEntityDecl(gDTDStr, false, fMemoryManager);
declDTD->setSystemId(sysId);
declDTD->setIsExternal(true);
Janitor<DTDEntityDecl> janDecl(declDTD);

// Mark this one as a throw at end
reader->setThrowAtEnd(true);

// And push it onto the stack, with its pseudo name
fReaderMgr.pushReader(reader, declDTD);
fReaderMgr.pushReaderAdoptEntity(reader, declDTD);

// Tell it its not in an include section
dtdScanner.scanExtSubsetDecl(false, true);
Expand Down Expand Up @@ -2131,13 +2130,12 @@ Grammar* DGXMLScanner::loadDTDGrammar(const InputSource& src,
DTDEntityDecl* declDTD = new (fMemoryManager) DTDEntityDecl(gDTDStr, false, fMemoryManager);
declDTD->setSystemId(src.getSystemId());
declDTD->setIsExternal(true);
Janitor<DTDEntityDecl> janDecl(declDTD);

// Mark this one as a throw at end
newReader->setThrowAtEnd(true);

// And push it onto the stack, with its pseudo name
fReaderMgr.pushReader(newReader, declDTD);
fReaderMgr.pushReaderAdoptEntity(newReader, declDTD);

// If we have a doc type handler and advanced callbacks are enabled,
// call the doctype event.
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6 changes: 2 additions & 4 deletions src/xercesc/internal/IGXMLScanner.cpp
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Expand Up @@ -1535,13 +1535,12 @@ void IGXMLScanner::scanDocTypeDecl()
DTDEntityDecl* declDTD = new (fMemoryManager) DTDEntityDecl(gDTDStr, false, fMemoryManager);
declDTD->setSystemId(sysId);
declDTD->setIsExternal(true);
Janitor<DTDEntityDecl> janDecl(declDTD);

// Mark this one as a throw at end
reader->setThrowAtEnd(true);

// And push it onto the stack, with its pseudo name
fReaderMgr.pushReader(reader, declDTD);
fReaderMgr.pushReaderAdoptEntity(reader, declDTD);

// Tell it its not in an include section
dtdScanner.scanExtSubsetDecl(false, true);
Expand Down Expand Up @@ -3098,13 +3097,12 @@ Grammar* IGXMLScanner::loadDTDGrammar(const InputSource& src,
DTDEntityDecl* declDTD = new (fMemoryManager) DTDEntityDecl(gDTDStr, false, fMemoryManager);
declDTD->setSystemId(src.getSystemId());
declDTD->setIsExternal(true);
Janitor<DTDEntityDecl> janDecl(declDTD);

// Mark this one as a throw at end
newReader->setThrowAtEnd(true);

// And push it onto the stack, with its pseudo name
fReaderMgr.pushReader(newReader, declDTD);
fReaderMgr.pushReaderAdoptEntity(newReader, declDTD);

// If we have a doc type handler and advanced callbacks are enabled,
// call the doctype event.
Expand Down