diff options
| -rw-r--r-- | core/fpdfapi/parser/cpdf_linearized_header.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/core/fpdfapi/parser/cpdf_linearized_header.cpp b/core/fpdfapi/parser/cpdf_linearized_header.cpp index 3251a5eb9f..994d69f9b6 100644 --- a/core/fpdfapi/parser/cpdf_linearized_header.cpp +++ b/core/fpdfapi/parser/cpdf_linearized_header.cpp @@ -7,6 +7,7 @@ #include "core/fpdfapi/parser/cpdf_linearized_header.h" #include <algorithm> +#include <limits> #include <utility> #include "core/fpdfapi/parser/cpdf_array.h" @@ -18,6 +19,7 @@ namespace { constexpr FX_FILESIZE kLinearizedHeaderOffset = 9; +constexpr size_t kMaxInt = static_cast<size_t>(std::numeric_limits<int>::max()); template <class T> bool IsValidNumericDictionaryValue(const CPDF_Dictionary* pDict, @@ -39,6 +41,8 @@ bool IsLinearizedHeaderValid(const CPDF_LinearizedHeader* header, FX_FILESIZE file_size) { ASSERT(header); return header->GetFileSize() == file_size && + static_cast<int>(header->GetFirstPageNo()) >= 0 && + header->GetFirstPageNo() < kMaxInt && header->GetMainXRefTableFirstEntryOffset() < file_size && header->GetPageCount() > 0 && header->GetFirstPageEndOffset() < file_size && |