From 31b3a2b31a50f83ed100e01485013fd871399f45 Mon Sep 17 00:00:00 2001 From: Tom Sepez Date: Mon, 18 May 2015 14:18:08 -0700 Subject: Add safe FX_Alloc2D() macro This avoids unchecked multiplications when computing a size argument to malloc(). Such an overflow is very scary, and can result in exploitable bugs. Along the way, kill off some return checks, since we know this can't return NULL. R=thestig@chromium.org Review URL: https://codereview.chromium.org/1143663004 --- core/src/fpdftext/fpdf_text.cpp | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'core/src/fpdftext/fpdf_text.cpp') diff --git a/core/src/fpdftext/fpdf_text.cpp b/core/src/fpdftext/fpdf_text.cpp index 6c1e22563d..a0b01042e1 100644 --- a/core/src/fpdftext/fpdf_text.cpp +++ b/core/src/fpdftext/fpdf_text.cpp @@ -57,10 +57,9 @@ void CTextPage::ProcessObject(CPDF_PageObject* pObject) CPDF_TextObject* pText = (CPDF_TextObject*)pObject; CPDF_Font* pFont = pText->m_TextState.GetFont(); int count = pText->CountItems(); - FX_FLOAT* pPosArray = FX_Alloc(FX_FLOAT, count * 2); - if (pPosArray) { - pText->CalcCharPos(pPosArray); - } + FX_FLOAT* pPosArray = FX_Alloc2D(FX_FLOAT, count, 2); + pText->CalcCharPos(pPosArray); + FX_FLOAT fontsize_h = pText->m_TextState.GetFontSizeH(); FX_FLOAT fontsize_v = pText->m_TextState.GetFontSizeV(); FX_DWORD space_charcode = pFont->CharCodeFromUnicode(' '); -- cgit v1.2.3