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authorLei Zhang <thestig@chromium.org>2015-09-10 16:13:31 -0700
committerLei Zhang <thestig@chromium.org>2015-09-10 16:13:31 -0700
commit89d8b4681ce98894a1ee1a6cf4bae77e00d28797 (patch)
tree352f1ff0bab0f1f812f256c74423aeac5db95e59 /core/src/fxcodec
parent70f4404e9a9e69afdfdd07715aa946f6561ce0cb (diff)
downloadpdfium-89d8b4681ce98894a1ee1a6cf4bae77e00d28797.tar.xz
Guard against null image data in CJBig2_GRRDProc.chromium/2509chromium/2508
Credit to karl at skomski.com for the initial version of the CL. BUG=527174 R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1305033006 .
Diffstat (limited to 'core/src/fxcodec')
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Context.cpp65
-rw-r--r--core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp6
2 files changed, 35 insertions, 36 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.cpp b/core/src/fxcodec/jbig2/JBig2_Context.cpp
index f045dbb20d..232bbf26af 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Context.cpp
@@ -402,6 +402,7 @@ int32_t CJBig2_Context::parseSegmentHeader(CJBig2_Segment* pSegment) {
failed:
return JBIG2_ERROR_TOO_SHORT;
}
+
int32_t CJBig2_Context::parseSegmentData(CJBig2_Segment* pSegment,
IFX_Pause* pPause) {
int32_t ret = ProcessiveParseSegmentData(pSegment, pPause);
@@ -411,6 +412,7 @@ int32_t CJBig2_Context::parseSegmentData(CJBig2_Segment* pSegment,
}
return ret;
}
+
int32_t CJBig2_Context::ProcessiveParseSegmentData(CJBig2_Segment* pSegment,
IFX_Pause* pPause) {
switch (pSegment->m_cFlags.s.type) {
@@ -419,37 +421,29 @@ int32_t CJBig2_Context::ProcessiveParseSegmentData(CJBig2_Segment* pSegment,
case 4:
case 6:
case 7:
- if (m_nState == JBIG2_OUT_OF_PAGE) {
- goto failed2;
- } else {
- return parseTextRegion(pSegment);
- }
+ if (m_nState == JBIG2_OUT_OF_PAGE)
+ return JBIG2_ERROR_FATAL;
+ return parseTextRegion(pSegment);
case 16:
return parsePatternDict(pSegment, pPause);
case 20:
case 22:
case 23:
- if (m_nState == JBIG2_OUT_OF_PAGE) {
- goto failed2;
- } else {
- return parseHalftoneRegion(pSegment, pPause);
- }
+ if (m_nState == JBIG2_OUT_OF_PAGE)
+ return JBIG2_ERROR_FATAL;
+ return parseHalftoneRegion(pSegment, pPause);
case 36:
case 38:
case 39:
- if (m_nState == JBIG2_OUT_OF_PAGE) {
- goto failed2;
- } else {
- return parseGenericRegion(pSegment, pPause);
- }
+ if (m_nState == JBIG2_OUT_OF_PAGE)
+ return JBIG2_ERROR_FATAL;
+ return parseGenericRegion(pSegment, pPause);
case 40:
case 42:
case 43:
- if (m_nState == JBIG2_OUT_OF_PAGE) {
- goto failed2;
- } else {
- return parseGenericRefinementRegion(pSegment);
- }
+ if (m_nState == JBIG2_OUT_OF_PAGE)
+ return JBIG2_ERROR_FATAL;
+ return parseGenericRefinementRegion(pSegment);
case 48: {
FX_WORD wTemp;
nonstd::unique_ptr<JBig2PageInfo> pPageInfo(new JBig2PageInfo);
@@ -459,24 +453,26 @@ int32_t CJBig2_Context::ProcessiveParseSegmentData(CJBig2_Segment* pSegment,
(m_pStream->readInteger(&pPageInfo->m_dwResolutionY) != 0) ||
(m_pStream->read1Byte(&pPageInfo->m_cFlags) != 0) ||
(m_pStream->readShortInteger(&wTemp) != 0)) {
- goto failed1;
+ return JBIG2_ERROR_TOO_SHORT;
}
- pPageInfo->m_bIsStriped = ((wTemp >> 15) & 1) ? 1 : 0;
+ pPageInfo->m_bIsStriped = ((wTemp >> 15) & 1) ? TRUE : FALSE;
pPageInfo->m_wMaxStripeSize = wTemp & 0x7fff;
- if ((pPageInfo->m_dwHeight == 0xffffffff) &&
- (pPageInfo->m_bIsStriped != TRUE)) {
+ bool bMaxHeight = (pPageInfo->m_dwHeight == 0xffffffff);
+ if (bMaxHeight && pPageInfo->m_bIsStriped != TRUE)
pPageInfo->m_bIsStriped = TRUE;
- }
+
if (!m_bBufSpecified) {
delete m_pPage;
- if (pPageInfo->m_dwHeight == 0xffffffff) {
- m_pPage = new CJBig2_Image(pPageInfo->m_dwWidth,
- pPageInfo->m_wMaxStripeSize);
- } else {
- m_pPage =
- new CJBig2_Image(pPageInfo->m_dwWidth, pPageInfo->m_dwHeight);
- }
+ FX_DWORD height =
+ bMaxHeight ? pPageInfo->m_wMaxStripeSize : pPageInfo->m_dwHeight;
+ m_pPage = new CJBig2_Image(pPageInfo->m_dwWidth, height);
+ }
+
+ if (!m_pPage->m_pData) {
+ m_ProcessiveStatus = FXCODEC_STATUS_ERROR;
+ return JBIG2_ERROR_TOO_SHORT;
}
+
m_pPage->fill((pPageInfo->m_cFlags & 4) ? 1 : 0);
m_PageInfoList.push_back(pPageInfo.release());
m_nState = JBIG2_IN_PAGE;
@@ -502,11 +498,8 @@ int32_t CJBig2_Context::ProcessiveParseSegmentData(CJBig2_Segment* pSegment,
break;
}
return JBIG2_SUCCESS;
-failed1:
- return JBIG2_ERROR_TOO_SHORT;
-failed2:
- return JBIG2_ERROR_FATAL;
}
+
int32_t CJBig2_Context::parseSymbolDict(CJBig2_Segment* pSegment,
IFX_Pause* pPause) {
FX_DWORD dwTemp;
diff --git a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
index 2e558ee7e8..1c56db984b 100644
--- a/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_GeneralDecoder.cpp
@@ -719,6 +719,9 @@ CJBig2_Image* CJBig2_GRRDProc::decode_Template0_unopt(
CJBig2_Image* CJBig2_GRRDProc::decode_Template0_opt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* grContext) {
+ if (!GRREFERENCE->m_pData)
+ return nullptr;
+
FX_BOOL LTP, SLTP, bVal;
FX_DWORD CONTEXT;
FX_DWORD line1, line1_r, line2_r, line3_r;
@@ -953,6 +956,9 @@ CJBig2_Image* CJBig2_GRRDProc::decode_Template1_unopt(
CJBig2_Image* CJBig2_GRRDProc::decode_Template1_opt(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* grContext) {
+ if (!GRREFERENCE->m_pData)
+ return nullptr;
+
FX_BOOL LTP, SLTP, bVal;
FX_DWORD CONTEXT;
FX_DWORD line1, line1_r, line2_r, line3_r;