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authorLei Zhang <thestig@chromium.org>2015-11-24 11:29:36 -0800
committerLei Zhang <thestig@chromium.org>2015-11-24 11:29:36 -0800
commitd03bc01003ae2603dafdc07b901ffef0a509a2b9 (patch)
tree978be82850771bb717c19218c5431a45afd75876 /core/src/fxcodec
parent3b1bd5cbbcc1a606275fe98e813a37531572f374 (diff)
downloadpdfium-d03bc01003ae2603dafdc07b901ffef0a509a2b9.tar.xz
Fix a NULL pointer crash in the CJBig2_Image copy constructor.
Also change the copy ctor to take a const ref. BUG=560520 R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1472113002 .
Diffstat (limited to 'core/src/fxcodec')
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Image.cpp2
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Image.h9
-rw-r--r--core/src/fxcodec/jbig2/JBig2_SddProc.cpp4
3 files changed, 8 insertions, 7 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_Image.cpp b/core/src/fxcodec/jbig2/JBig2_Image.cpp
index a2a0acfe95..074458744d 100644
--- a/core/src/fxcodec/jbig2/JBig2_Image.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Image.cpp
@@ -36,7 +36,7 @@ CJBig2_Image::CJBig2_Image(int32_t w,
m_pData = pBuf;
m_bNeedFree = FALSE;
}
-CJBig2_Image::CJBig2_Image(CJBig2_Image& im) {
+CJBig2_Image::CJBig2_Image(const CJBig2_Image& im) {
m_nWidth = im.m_nWidth;
m_nHeight = im.m_nHeight;
m_nStride = im.m_nStride;
diff --git a/core/src/fxcodec/jbig2/JBig2_Image.h b/core/src/fxcodec/jbig2/JBig2_Image.h
index e77da9059c..c47d275cf7 100644
--- a/core/src/fxcodec/jbig2/JBig2_Image.h
+++ b/core/src/fxcodec/jbig2/JBig2_Image.h
@@ -4,8 +4,8 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-#ifndef _JBIG2_IMAGE_H_
-#define _JBIG2_IMAGE_H_
+#ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_IMAGE_H_
+#define CORE_SRC_FXCODEC_JBIG2_JBIG2_IMAGE_H_
#include "JBig2_Define.h"
@@ -24,7 +24,7 @@ class CJBig2_Image {
CJBig2_Image(int32_t w, int32_t h, int32_t stride, uint8_t* pBuf);
- CJBig2_Image(CJBig2_Image& im);
+ CJBig2_Image(const CJBig2_Image& im);
~CJBig2_Image();
@@ -81,4 +81,5 @@ class CJBig2_Image {
FX_BOOL m_bNeedFree;
};
-#endif
+
+#endif // CORE_SRC_FXCODEC_JBIG2_JBIG2_IMAGE_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_SddProc.cpp b/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
index 52aef2b37f..edfc074003 100644
--- a/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_SddProc.cpp
@@ -266,7 +266,7 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Arith(
for (I = 0; I < SDNUMINSYMS + SDNUMNEWSYMS; I++) {
if (EXFLAGS[I] && J < SDNUMEXSYMS) {
if (I < SDNUMINSYMS) {
- pDict->AddImage(new CJBig2_Image(*SDINSYMS[I]));
+ pDict->AddImage(SDINSYMS[I] ? new CJBig2_Image(*SDINSYMS[I]) : nullptr);
} else {
pDict->AddImage(SDNEWSYMS[I - SDNUMINSYMS]);
}
@@ -604,7 +604,7 @@ CJBig2_SymbolDict* CJBig2_SDDProc::decode_Huffman(
for (I = 0; I < SDNUMINSYMS + SDNUMNEWSYMS; I++) {
if (EXFLAGS[I] && J < SDNUMEXSYMS) {
if (I < SDNUMINSYMS) {
- pDict->AddImage(new CJBig2_Image(*SDINSYMS[I]));
+ pDict->AddImage(SDINSYMS[I] ? new CJBig2_Image(*SDINSYMS[I]) : nullptr);
} else {
pDict->AddImage(SDNEWSYMS[I - SDNUMINSYMS]);
}