Index: core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp |
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp |
index 984e08d882cd04f95c9ce223500c18ac8ac40f3e..a94e5bb01d7eccd9933bab45d10e2c4f3592bce5 100644 |
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp |
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp |
@@ -2521,28 +2521,31 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict, |
len -= 1; |
} |
} |
- if (len <= 0) { |
+ if (len < 0) { |
return nullptr; |
} |
pDict->SetAtInteger(FX_BSTRC("Length"), len); |
} |
m_Pos = streamStartPos; |
} |
- if (len <= 0) { |
+ if (len < 0) { |
return nullptr; |
} |
- uint8_t* pData = FX_Alloc(uint8_t, len); |
- ReadBlock(pData, len); |
- if (pCryptoHandler) { |
- CFX_BinaryBuf dest_buf; |
- dest_buf.EstimateSize(pCryptoHandler->DecryptGetSize(len)); |
- void* context = pCryptoHandler->DecryptStart(objnum, gennum); |
- pCryptoHandler->DecryptStream(context, pData, len, dest_buf); |
- pCryptoHandler->DecryptFinish(context, dest_buf); |
- FX_Free(pData); |
- pData = dest_buf.GetBuffer(); |
- len = dest_buf.GetSize(); |
- dest_buf.DetachBuffer(); |
+ uint8_t* pData = nullptr; |
+ if (len > 0) { |
+ pData = FX_Alloc(uint8_t, len); |
+ ReadBlock(pData, len); |
+ if (pCryptoHandler) { |
+ CFX_BinaryBuf dest_buf; |
+ dest_buf.EstimateSize(pCryptoHandler->DecryptGetSize(len)); |
+ void* context = pCryptoHandler->DecryptStart(objnum, gennum); |
+ pCryptoHandler->DecryptStream(context, pData, len, dest_buf); |
+ pCryptoHandler->DecryptFinish(context, dest_buf); |
+ FX_Free(pData); |
+ pData = dest_buf.GetBuffer(); |
+ len = dest_buf.GetSize(); |
+ dest_buf.DetachBuffer(); |
+ } |
} |
CPDF_Stream* pStream = new CPDF_Stream(pData, len, pDict); |
if (pContext) { |