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authorNicolas Pena <npm@chromium.org>2018-04-13 20:17:26 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-04-13 20:17:26 +0000
commitaf2ee2cc2e41709df7afc8f49f11ed2e8cf6dedf (patch)
tree7f97695aede6f525846e77d25af5410051828196 /core/fpdfapi/font/cpdf_font.cpp
parent97b47dc407e772a82782d5d64de5560992df2bf9 (diff)
downloadpdfium-af2ee2cc2e41709df7afc8f49f11ed2e8cf6dedf.tar.xz
Fix integer overflow in CPDF_Font::FallbackFontFromCharcode
Bug: chromium:831583 Change-Id: Idc980ef47cdd942bddc75d9b7fe4a56bdeacdc1a Reviewed-on: https://pdfium-review.googlesource.com/30670 Commit-Queue: Nicolás Peña Moreno <npm@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org>
Diffstat (limited to 'core/fpdfapi/font/cpdf_font.cpp')
-rw-r--r--core/fpdfapi/font/cpdf_font.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/core/fpdfapi/font/cpdf_font.cpp b/core/fpdfapi/font/cpdf_font.cpp
index f636e9397a..ad7eeea264 100644
--- a/core/fpdfapi/font/cpdf_font.cpp
+++ b/core/fpdfapi/font/cpdf_font.cpp
@@ -452,9 +452,11 @@ const char* CPDF_Font::GetAdobeCharName(
uint32_t CPDF_Font::FallbackFontFromCharcode(uint32_t charcode) {
if (m_FontFallbacks.empty()) {
m_FontFallbacks.push_back(pdfium::MakeUnique<CFX_Font>());
+ pdfium::base::CheckedNumeric<int> safeWeight = m_StemV;
+ safeWeight *= 5;
m_FontFallbacks[0]->LoadSubst("Arial", IsTrueTypeFont(), m_Flags,
- m_StemV * 5, m_ItalicAngle, 0,
- IsVertWriting());
+ safeWeight.ValueOrDefault(FXFONT_FW_NORMAL),
+ m_ItalicAngle, 0, IsVertWriting());
}
return 0;
}