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| author | Tom Sepez <tsepez@chromium.org> | 2015-05-15 08:44:31 -0700 |
|---|---|---|
| committer | Tom Sepez <tsepez@chromium.org> | 2015-05-15 08:44:31 -0700 |
| commit | 7f3b99a6a78e524613337f42a99b5634c0ad05f8 (patch) | |
| tree | f13654bc0408c72a056b502d3106fd8e28c616e9 /core/include/fxcrt/fx_string.h | |
| parent | b60617f5557a037e64876f7495af80573a35cb4f (diff) | |
| download | pdfium-7f3b99a6a78e524613337f42a99b5634c0ad05f8.tar.xz | |
Fix potential UAF in ConcatInPlace.
If ConcatCopy somehow gets a zero nNewlen, it returns early, without
allocating a new m_Data. ConcatInPlace then frees the old one, leaving
m_Data dangling.
Also be concerned about the multiplication in the widestring version.
So use wmemcpy and let the library cope with it.
R=thestig@chromium.org
Review URL: https://codereview.chromium.org/1130763007
Diffstat (limited to 'core/include/fxcrt/fx_string.h')
| -rw-r--r-- | core/include/fxcrt/fx_string.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/core/include/fxcrt/fx_string.h b/core/include/fxcrt/fx_string.h index a7b9a23e25..3614cbe0ee 100644 --- a/core/include/fxcrt/fx_string.h +++ b/core/include/fxcrt/fx_string.h @@ -389,6 +389,7 @@ protected: void AllocBeforeWrite(FX_STRSIZE nLen); StringData* m_pData; + friend class fxcrt_ByteStringConcatInPlace_Test; }; inline CFX_ByteStringC::CFX_ByteStringC(const CFX_ByteString& src) { @@ -815,6 +816,7 @@ protected: void AllocCopy(CFX_WideString& dest, FX_STRSIZE nCopyLen, FX_STRSIZE nCopyIndex) const; StringData* m_pData; + friend class fxcrt_WideStringConcatInPlace_Test; }; inline CFX_WideStringC::CFX_WideStringC(const CFX_WideString& src) { |