diff options
| author | Lei Zhang <thestig@chromium.org> | 2015-08-30 22:45:08 -0700 |
|---|---|---|
| committer | Lei Zhang <thestig@chromium.org> | 2015-08-30 22:45:08 -0700 |
| commit | 0c9f1d8f6dd6bb8b9c3eba73e4ffd0bb2ca4fd97 (patch) | |
| tree | 4b59250ccc60afd100a0a32b0c70ea7b0c894d92 /core | |
| parent | 5e4a5cc9ad76dc08d62fb1e10bdfb811f3720c43 (diff) | |
| download | pdfium-0c9f1d8f6dd6bb8b9c3eba73e4ffd0bb2ca4fd97.tar.xz | |
Fix infinite loop for objects that reference themselves.
BUG=pdfium:193
R=jun_fang@foxitsoftware.com
Review URL: https://codereview.chromium.org/1306793002 .
Diffstat (limited to 'core')
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp index 592a7b1326..e1e821c4c5 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp @@ -53,7 +53,7 @@ CFX_ByteString CPDF_Object::GetString() const { break; } CPDF_Object* pObj = - pRef->m_pObjList->GetIndirectObject(pRef->m_RefObjNum); + pRef->m_pObjList->GetIndirectObject(pRef->GetRefObjNum()); if (pObj == NULL) { return CFX_ByteString(); } @@ -76,7 +76,7 @@ CFX_ByteStringC CPDF_Object::GetConstString() const { break; } CPDF_Object* pObj = - pRef->m_pObjList->GetIndirectObject(pRef->m_RefObjNum); + pRef->m_pObjList->GetIndirectObject(pRef->GetRefObjNum()); if (pObj == NULL) { return CFX_ByteStringC(); } @@ -95,7 +95,7 @@ FX_FLOAT CPDF_Object::GetNumber() const { break; } CPDF_Object* pObj = - pRef->m_pObjList->GetIndirectObject(pRef->m_RefObjNum); + pRef->m_pObjList->GetIndirectObject(pRef->GetRefObjNum()); if (pObj == NULL) { return 0; } @@ -125,7 +125,7 @@ int CPDF_Object::GetInteger() const { return 0; } CPDF_Object* pObj = - pRef->m_pObjList->GetIndirectObject(pRef->m_RefObjNum, &context); + pRef->m_pObjList->GetIndirectObject(pRef->GetRefObjNum(), &context); if (pObj == NULL) { return 0; } @@ -134,6 +134,7 @@ int CPDF_Object::GetInteger() const { } return 0; } + CPDF_Dictionary* CPDF_Object::GetDict() const { switch (m_Type) { case PDFOBJ_DICTIONARY: @@ -142,19 +143,19 @@ CPDF_Dictionary* CPDF_Object::GetDict() const { return ((CPDF_Stream*)this)->GetDict(); case PDFOBJ_REFERENCE: { CPDF_Reference* pRef = (CPDF_Reference*)this; - if (pRef->m_pObjList == NULL) { - break; - } - CPDF_Object* pObj = - pRef->m_pObjList->GetIndirectObject(pRef->m_RefObjNum); - if (pObj == NULL) { - return NULL; - } + CPDF_IndirectObjects* pIndirect = pRef->GetObjList(); + if (!pIndirect) + return nullptr; + CPDF_Object* pObj = pIndirect->GetIndirectObject(pRef->GetRefObjNum()); + if (!pObj || (pObj == this)) + return nullptr; return pObj->GetDict(); } + default: + return nullptr; } - return NULL; } + CPDF_Array* CPDF_Object::GetArray() const { if (m_Type == PDFOBJ_ARRAY) return (CPDF_Array*)this; @@ -184,7 +185,7 @@ int CPDF_Object::GetDirectType() const { return m_Type; } CPDF_Reference* pRef = (CPDF_Reference*)this; - return pRef->m_pObjList->GetIndirectType(pRef->m_RefObjNum); + return pRef->m_pObjList->GetIndirectType(pRef->GetRefObjNum()); } FX_BOOL CPDF_Object::IsIdentical(CPDF_Object* pOther) const { if (this == pOther) { @@ -232,7 +233,7 @@ CPDF_Object* CPDF_Object::GetDirect() const { if (pRef->m_pObjList == NULL) { return NULL; } - return pRef->m_pObjList->GetIndirectObject(pRef->m_RefObjNum); + return pRef->m_pObjList->GetIndirectObject(pRef->GetRefObjNum()); } CPDF_Object* CPDF_Object::Clone(FX_BOOL bDirect) const { CFX_MapPtrToPtr visited; @@ -289,7 +290,7 @@ CPDF_Object* CPDF_Object::CloneInternal(FX_BOOL bDirect, } case PDFOBJ_REFERENCE: { CPDF_Reference* pRef = (CPDF_Reference*)this; - FX_DWORD obj_num = pRef->m_RefObjNum; + FX_DWORD obj_num = pRef->GetRefObjNum(); if (bDirect && !visited->GetValueAt((void*)(uintptr_t)obj_num)) { visited->SetAt((void*)(uintptr_t)obj_num, (void*)1); if (!pRef->GetDirect()) |