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author | Tom Sepez <tsepez@chromium.org> | 2015-05-15 08:44:31 -0700 |
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committer | Tom Sepez <tsepez@chromium.org> | 2015-05-15 08:44:31 -0700 |
commit | 7f3b99a6a78e524613337f42a99b5634c0ad05f8 (patch) | |
tree | f13654bc0408c72a056b502d3106fd8e28c616e9 /core/src/fxcrt/fx_basic_bstring_unittest.cpp | |
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/src/fxcrt/fx_basic_bstring_unittest.cpp')
-rw-r--r-- | core/src/fxcrt/fx_basic_bstring_unittest.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/core/src/fxcrt/fx_basic_bstring_unittest.cpp b/core/src/fxcrt/fx_basic_bstring_unittest.cpp index 1f80207e96..bcdd33b8b8 100644 --- a/core/src/fxcrt/fx_basic_bstring_unittest.cpp +++ b/core/src/fxcrt/fx_basic_bstring_unittest.cpp @@ -288,6 +288,33 @@ TEST(fxcrt, ByteStringCNull) { EXPECT_NE(null_string, non_null_string); } +TEST(fxcrt, ByteStringConcatInPlace) { + CFX_ByteString fred; + fred.ConcatInPlace(4, "FRED"); + EXPECT_EQ("FRED", fred); + + fred.ConcatInPlace(2, "DY"); + EXPECT_EQ("FREDDY", fred); + + fred.Delete(3, 3); + EXPECT_EQ("FRE", fred); + + fred.ConcatInPlace(1, "D"); + EXPECT_EQ("FRED", fred); + + CFX_ByteString copy = fred; + fred.ConcatInPlace(2, "DY"); + EXPECT_EQ("FREDDY", fred); + EXPECT_EQ("FRED", copy); + + // Test invalid arguments. + copy = fred; + fred.ConcatInPlace(-6, "freddy"); + CFX_ByteString not_aliased("xxxxxx"); + EXPECT_EQ("FREDDY", fred); + EXPECT_EQ("xxxxxx", not_aliased); +} + TEST(fxcrt, ByteStringCNotNull) { CFX_ByteStringC string3("abc"); CFX_ByteStringC string6("abcdef"); |