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| author | tnurnberg@salvation.intern.azundris.com <> | 2006-09-04 06:16:34 +0200 |
|---|---|---|
| committer | tnurnberg@salvation.intern.azundris.com <> | 2006-09-04 06:16:34 +0200 |
| commit | 41f19324886d62935728a033e6135b77b0b21e77 (patch) | |
| tree | c7039cec08667391b6eac2780670c33d5b05f669 /sql/sql_string.cc | |
| parent | 635281619b73801417cec034f46a31d09cbbd298 (diff) | |
| download | mariadb-git-41f19324886d62935728a033e6135b77b0b21e77.tar.gz | |
Bug#21913: DATE_FORMAT() Crashes mysql server if I use it through mysql-connector-j driver.
Variable character_set_results can legally be NULL (for "no conversion.")
This could result in a NULL deref that crashed the server. Fixed.
(Although ran some additional precursory tests to see whether I could break
anything else, but no breakage so far.)
Diffstat (limited to 'sql/sql_string.cc')
| -rw-r--r-- | sql/sql_string.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sql/sql_string.cc b/sql/sql_string.cc index 939ffe8d9d2..aaa85b0d96c 100644 --- a/sql/sql_string.cc +++ b/sql/sql_string.cc @@ -248,6 +248,10 @@ bool String::copy(const char *str,uint32 arg_length, CHARSET_INFO *cs) 0 No conversion needed 1 Either character set conversion or adding leading zeros (e.g. for UCS-2) must be done + + NOTE + to_cs may be NULL for "no conversion" if the system variable + character_set_results is NULL. */ bool String::needs_conversion(uint32 arg_length, @@ -256,7 +260,8 @@ bool String::needs_conversion(uint32 arg_length, uint32 *offset) { *offset= 0; - if ((to_cs == &my_charset_bin) || + if (!to_cs || + (to_cs == &my_charset_bin) || (to_cs == from_cs) || my_charset_same(from_cs, to_cs) || ((from_cs == &my_charset_bin) && |