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MDEV-16552: [10.0] ASAN global-buffer-overflow in is_stat_table / statistics_for_tables_is_needed

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Backport the fix f214d36512 to 10.0

   Author: Sergei Golubchik <serg@mariadb.org>
   Date:   Tue Apr 17 00:44:34 2018 +0200

    ASAN error in is_stat_table()

    don't memcmp beyond the first argument's end

    Also: use my_strcasecmp(table_alias_charset), like elsewhere, not memcmp
This commit is contained in:
Varun Gupta 2018-07-11 02:28:42 +05:30
commit ad9d1e8c3f
4 changed files with 22 additions and 2 deletions
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7
mysql-test/r/stat_tables.result
View file

@ -516,4 +516,11 @@ use test;
drop database db1;
drop database db2;
drop table t1;
#
# MDEV-16552: [10.0] ASAN global-buffer-overflow in is_stat_table / statistics_for_tables_is_needed
#
SET use_stat_tables = PREFERABLY;
SELECT CONVERT_TZ( '1991-09-20 10:11:02', '+00:00', 'GMT' );
CONVERT_TZ( '1991-09-20 10:11:02', '+00:00', 'GMT' )
NULL
set use_stat_tables=@save_use_stat_tables;

7
mysql-test/r/stat_tables_innodb.result
View file

@ -543,6 +543,13 @@ use test;
drop database db1;
drop database db2;
drop table t1;
#
# MDEV-16552: [10.0] ASAN global-buffer-overflow in is_stat_table / statistics_for_tables_is_needed
#
SET use_stat_tables = PREFERABLY;
SELECT CONVERT_TZ( '1991-09-20 10:11:02', '+00:00', 'GMT' );
CONVERT_TZ( '1991-09-20 10:11:02', '+00:00', 'GMT' )
NULL
set use_stat_tables=@save_use_stat_tables;
set optimizer_switch=@save_optimizer_switch_for_stat_tables_test;
SET SESSION STORAGE_ENGINE=DEFAULT;

6
mysql-test/t/stat_tables.test
View file

@ -305,4 +305,10 @@ drop database db1;
drop database db2;
drop table t1;
--echo #
--echo # MDEV-16552: [10.0] ASAN global-buffer-overflow in is_stat_table / statistics_for_tables_is_needed
--echo #
SET use_stat_tables = PREFERABLY;
SELECT CONVERT_TZ( '1991-09-20 10:11:02', '+00:00', 'GMT' );
set use_stat_tables=@save_use_stat_tables;

4
sql/sql_statistics.cc
View file

@ -3858,11 +3858,11 @@ bool is_stat_table(const char *db, const char *table)
{
DBUG_ASSERT(db && table);
if (!memcmp(db, stat_tables_db_name.str, stat_tables_db_name.length))
if (!my_strcasecmp(table_alias_charset, db, stat_tables_db_name.str))
{
for (uint i= 0; i < STATISTICS_TABLES; i ++)
{
if (!memcmp(table, stat_table_name[i].str, stat_table_name[i].length))
if (!my_strcasecmp(table_alias_charset, table, stat_table_name[i].str))
return true;
}
}