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author | Tom Sepez <tsepez@chromium.org> | 2018-10-17 17:57:51 +0000 |
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committer | Chromium commit bot <commit-bot@chromium.org> | 2018-10-17 17:57:51 +0000 |
commit | 5ae6c564d16ce8b625df3d1950abc822f9ecc987 (patch) | |
tree | 96bb64df3166e46db397e405789588bf8dc53842 /fpdfsdk | |
parent | 785a26dc649af80c593f899a606dff4dae7c48fd (diff) | |
download | pdfium-5ae6c564d16ce8b625df3d1950abc822f9ecc987.tar.xz |
Add CPDF_{Array,Dictionary}Locker to catch illegal iteration patterns.
Move begin/end methods onto locker object which tracks whether
iterators are in existence.
Change-Id: Ia869f313fce48d10a0d0180d0cc083eed6ea1584
Reviewed-on: https://pdfium-review.googlesource.com/c/44070
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Diffstat (limited to 'fpdfsdk')
-rw-r--r-- | fpdfsdk/formfiller/cba_fontmap.cpp | 3 | ||||
-rw-r--r-- | fpdfsdk/fpdf_annot.cpp | 7 | ||||
-rw-r--r-- | fpdfsdk/fpdf_editpage.cpp | 3 | ||||
-rw-r--r-- | fpdfsdk/fpdf_flatten.cpp | 6 | ||||
-rw-r--r-- | fpdfsdk/fpdf_ppo.cpp | 29 | ||||
-rw-r--r-- | fpdfsdk/fpdf_transformpage.cpp | 7 | ||||
-rw-r--r-- | fpdfsdk/fpdf_view.cpp | 3 |
7 files changed, 35 insertions, 23 deletions
diff --git a/fpdfsdk/formfiller/cba_fontmap.cpp b/fpdfsdk/formfiller/cba_fontmap.cpp index f2e7c840f8..24d1ef9de9 100644 --- a/fpdfsdk/formfiller/cba_fontmap.cpp +++ b/fpdfsdk/formfiller/cba_fontmap.cpp @@ -117,7 +117,8 @@ CPDF_Font* CBA_FontMap::FindResFontSameCharset(const CPDF_Dictionary* pResDict, CPDF_Document* pDocument = GetDocument(); CPDF_Font* pFind = nullptr; - for (const auto& it : *pFonts) { + CPDF_DictionaryLocker locker(pFonts); + for (const auto& it : locker) { const ByteString& csKey = it.first; if (!it.second) continue; diff --git a/fpdfsdk/fpdf_annot.cpp b/fpdfsdk/fpdf_annot.cpp index e4bfab0b70..2c8e68eca7 100644 --- a/fpdfsdk/fpdf_annot.cpp +++ b/fpdfsdk/fpdf_annot.cpp @@ -277,17 +277,18 @@ FPDF_EXPORT int FPDF_CALLCONV FPDFPage_GetAnnotIndex(FPDF_PAGE page, if (!pAnnots) return -1; + CPDF_ArrayLocker locker(pAnnots); CPDF_Dictionary* pDict = pAnnot->GetAnnotDict(); auto it = - std::find_if(pAnnots->begin(), pAnnots->end(), + std::find_if(locker.begin(), locker.end(), [pDict](const std::unique_ptr<CPDF_Object>& candidate) { return candidate->GetDirect() == pDict; }); - if (it == pAnnots->end()) + if (it == locker.end()) return -1; - return it - pAnnots->begin(); + return it - locker.begin(); } FPDF_EXPORT void FPDF_CALLCONV FPDFPage_CloseAnnot(FPDF_ANNOTATION annot) { diff --git a/fpdfsdk/fpdf_editpage.cpp b/fpdfsdk/fpdf_editpage.cpp index 8c9a33d816..dcb3d5e1f0 100644 --- a/fpdfsdk/fpdf_editpage.cpp +++ b/fpdfsdk/fpdf_editpage.cpp @@ -389,7 +389,8 @@ FPDFPageObjMark_GetParamKey(FPDF_PAGEOBJECTMARK mark, if (!pParams) return false; - for (auto& it : *pParams) { + CPDF_DictionaryLocker locker(pParams); + for (auto& it : locker) { if (index == 0) { *out_buflen = Utf16EncodeMaybeCopyAndReturnLength( WideString::FromUTF8(it.first.AsStringView()), buffer, buflen); diff --git a/fpdfsdk/fpdf_flatten.cpp b/fpdfsdk/fpdf_flatten.cpp index de396667f5..98529c53c8 100644 --- a/fpdfsdk/fpdf_flatten.cpp +++ b/fpdfsdk/fpdf_flatten.cpp @@ -90,7 +90,8 @@ int ParserAnnots(CPDF_Document* pSourceDoc, if (!pAnnots) return FLATTEN_NOTHINGTODO; - for (const auto& pAnnot : *pAnnots) { + CPDF_ArrayLocker locker(pAnnots); + for (const auto& pAnnot : locker) { CPDF_Dictionary* pAnnotDic = ToDictionary(pAnnot->GetDirect()); if (!pAnnotDic) continue; @@ -338,7 +339,8 @@ FPDF_EXPORT int FPDF_CALLCONV FPDFPage_Flatten(FPDF_PAGE page, int nFlag) { pAPStream = pAPDic->GetStreamFor(sAnnotState); } else { if (pAPDic->size() > 0) { - CPDF_Object* pFirstObj = pAPDic->begin()->second.get(); + CPDF_DictionaryLocker locker(pAPDic); + CPDF_Object* pFirstObj = locker.begin()->second.get(); if (pFirstObj) { if (pFirstObj->IsReference()) pFirstObj = pFirstObj->GetDirect(); diff --git a/fpdfsdk/fpdf_ppo.cpp b/fpdfsdk/fpdf_ppo.cpp index fd270d997c..5c5930e097 100644 --- a/fpdfsdk/fpdf_ppo.cpp +++ b/fpdfsdk/fpdf_ppo.cpp @@ -360,18 +360,22 @@ bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, } case CPDF_Object::DICTIONARY: { CPDF_Dictionary* pDict = pObj->AsDictionary(); - auto it = pDict->begin(); - while (it != pDict->end()) { - const ByteString& key = it->first; - CPDF_Object* pNextObj = it->second.get(); - ++it; - if (key == "Parent" || key == "Prev" || key == "First") - continue; - if (!pNextObj) - return false; - if (!UpdateReference(pNextObj, pObjNumberMap)) - pDict->RemoveFor(key); + std::vector<ByteString> bad_keys; + { + CPDF_DictionaryLocker locker(pDict); + for (auto it = locker.begin(); it != locker.end(); ++it) { + const ByteString& key = it->first; + if (key == "Parent" || key == "Prev" || key == "First") + continue; + CPDF_Object* pNextObj = it->second.get(); + if (!pNextObj) + return false; + if (!UpdateReference(pNextObj, pObjNumberMap)) + bad_keys.push_back(key); + } } + for (const auto& key : bad_keys) + pDict->RemoveFor(key); break; } case CPDF_Object::ARRAY: { @@ -471,7 +475,8 @@ bool CPDF_PageExporter::ExportPage(const std::vector<uint32_t>& pageNums, return false; // Clone the page dictionary - for (const auto& it : *pSrcPageDict) { + CPDF_DictionaryLocker locker(pSrcPageDict); + for (const auto& it : locker) { const ByteString& cbSrcKeyStr = it.first; if (cbSrcKeyStr == pdfium::page_object::kType || cbSrcKeyStr == pdfium::page_object::kParent) { diff --git a/fpdfsdk/fpdf_transformpage.cpp b/fpdfsdk/fpdf_transformpage.cpp index 8e8c9d5b70..debf38b47e 100644 --- a/fpdfsdk/fpdf_transformpage.cpp +++ b/fpdfsdk/fpdf_transformpage.cpp @@ -219,11 +219,12 @@ FPDFPage_TransFormWithClip(FPDF_PAGE page, if (!pRes) return true; - CPDF_Dictionary* pPattenDict = pRes->GetDictFor("Pattern"); - if (!pPattenDict) + CPDF_Dictionary* pPatternDict = pRes->GetDictFor("Pattern"); + if (!pPatternDict) return true; - for (const auto& it : *pPattenDict) { + CPDF_DictionaryLocker locker(pPatternDict); + for (const auto& it : locker) { CPDF_Object* pObj = it.second.get(); if (pObj->IsReference()) pObj = pObj->GetDirect(); diff --git a/fpdfsdk/fpdf_view.cpp b/fpdfsdk/fpdf_view.cpp index 83d7e4a6cb..136841d566 100644 --- a/fpdfsdk/fpdf_view.cpp +++ b/fpdfsdk/fpdf_view.cpp @@ -1152,7 +1152,8 @@ FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDF_GetNamedDest(FPDF_DOCUMENT document, index -= count; int i = 0; ByteString bsName; - for (const auto& it : *pDest) { + CPDF_DictionaryLocker locker(pDest); + for (const auto& it : locker) { bsName = it.first; pDestObj = it.second.get(); if (!pDestObj) |