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| author | Alexey Kopytov <Alexey.Kopytov@sun.com> | 2009-05-20 12:30:06 +0400 |
|---|---|---|
| committer | Alexey Kopytov <Alexey.Kopytov@sun.com> | 2009-05-20 12:30:06 +0400 |
| commit | 0b62b7f26d2bef58983f7c7e8b288dd9bce0cdcc (patch) | |
| tree | a26c6bec3955954ec6879428333f88c62318fd91 /zlib | |
| parent | 1d03fb715ebcd995648793fbdba57d9a2069ede6 (diff) | |
| download | mariadb-git-0b62b7f26d2bef58983f7c7e8b288dd9bce0cdcc.tar.gz | |
Bug #44796: valgrind: too many my_longlong10_to_str_8bit
warnings after uncompressed_length
UNCOMPRESSED_LENGTH() did not validate its argument. In
particular, if the argument length was less than 4 bytes,
an uninitialized memory value was returned as a result.
Since the result of COMPRESS() is either an empty string or
a 4-byte length prefix followed by compressed data, the bug was
fixed by ensuring that the argument of UNCOMPRESSED_LENGTH() is
either an empty string or contains at least 5 bytes (as done in
UNCOMPRESS()). This is the best we can do to validate input
without decompressing.
mysql-test/r/func_compress.result:
Added a test case for bug #44796.
mysql-test/t/func_compress.test:
Added a test case for bug #44796.
sql/item_strfunc.cc:
Make sure that the argument of UNCOMPRESSED_LENGTH() contains
at least 5 bytes (as done in UNCOMPRESS()).
Diffstat (limited to 'zlib')
0 files changed, 0 insertions, 0 deletions