Make sure CFDE_XMLSyntaxParser's buffer is null terminated.
BUG=chromium:614962
Review-Url: https://codereview.chromium.org/2017803002
diff --git a/xfa/fde/xml/fde_xml_imp.cpp b/xfa/fde/xml/fde_xml_imp.cpp
index d7b22e0..6a2c9fe 100644
--- a/xfa/fde/xml/fde_xml_imp.cpp
+++ b/xfa/fde/xml/fde_xml_imp.cpp
@@ -8,6 +8,7 @@
#include <algorithm>
+#include "core/fxcrt/include/fx_safe_types.h"
#include "xfa/fgas/crt/fgas_codepage.h"
#include "xfa/fgas/crt/fgas_system.h"
@@ -1474,7 +1475,15 @@
uint8_t bom[4];
m_iCurrentPos = m_pStream->GetBOM(bom);
ASSERT(m_pBuffer == NULL);
- m_pBuffer = FX_Alloc(FX_WCHAR, m_iXMLPlaneSize);
+
+ FX_SAFE_INT32 alloc_size_safe = m_iXMLPlaneSize;
+ alloc_size_safe += 1; // For NUL.
+ if (!alloc_size_safe.IsValid() || alloc_size_safe.ValueOrDie() <= 0) {
+ m_syntaxParserResult = FDE_XmlSyntaxResult::Error;
+ return;
+ }
+
+ m_pBuffer = FX_Alloc(FX_WCHAR, alloc_size_safe.ValueOrDie());
m_pStart = m_pEnd = m_pBuffer;
ASSERT(!m_BlockBuffer.IsInitialized());
m_BlockBuffer.InitBuffer();