From f7a0d695b7e4f7b0dede23605ef449145aaa6d5a Mon Sep 17 00:00:00 2001
From: thestig <thestig@chromium.org>
Date: Thu, 29 Sep 2016 09:46:38 -0700
Subject: Check for negative page size in FindTextlineFlowOrientation()

BUG=pdfium:606

Review-Url: https://codereview.chromium.org/2378373002
---
 core/fpdftext/cpdf_textpage.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/fpdftext/cpdf_textpage.cpp b/core/fpdftext/cpdf_textpage.cpp
index d88464bfc4..b6eb87eea1 100644
--- a/core/fpdftext/cpdf_textpage.cpp
+++ b/core/fpdftext/cpdf_textpage.cpp
@@ -507,6 +507,9 @@ CPDF_TextPage::TextOrientation CPDF_TextPage::FindTextlineFlowOrientation()
 
   const int32_t nPageWidth = static_cast<int32_t>(m_pPage->GetPageWidth());
   const int32_t nPageHeight = static_cast<int32_t>(m_pPage->GetPageHeight());
+  if (nPageWidth <= 0 || nPageHeight <= 0)
+    return TextOrientation::Unknown;
+
   std::vector<bool> nHorizontalMask(nPageWidth);
   std::vector<bool> nVerticalMask(nPageHeight);
   FX_FLOAT fLineHeight = 0.0f;
-- 
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