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MDEV-19445 heap-use-after-free related to innodb_ft_aux_table

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Try to fix the race conditions between
SET GLOBAL innodb_ft_aux_table = ...;
and access to the INFORMATION_SCHEMA tables that depend on
this variable.

innodb_ft_aux_table: Replaces
fts_internal_tbl_name,fts_internal_tbl_name2. Just store the
user-specified parameter as is.

innodb_ft_aux_table_id: The table_id corresponding to
SET GLOBAL innodb_ft_aux_table, or 0 if the table does not exist
or does not contain FULLTEXT INDEX. If the table is renamed later,
the INFORMATION_SCHEMA tables will continue to refer to the table.
If the table is dropped or rebuilt, the INFORMATION_SCHEMA tables
will not find the table.
This commit is contained in:
Marko Mäkelä
2019-05-13 17:16:42 +03:00
parent 1c97e07f8f
commit 2647fd101d
14 changed files with 339 additions and 316 deletions
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43
mysql-test/suite/innodb_fts/t/innodb_ft_aux_table.test Normal file
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--source include/have_innodb.inc
CREATE TABLE t1 (v VARCHAR(100), FULLTEXT INDEX (v)) ENGINE=InnoDB;
insert into t1 VALUES('First record'),('Second record'),('Third record');
SET @save_ft_aux_table = @@GLOBAL.innodb_ft_aux_table;
connect (con1,localhost,root,,);
--error ER_WRONG_VALUE_FOR_VAR
SET GLOBAL innodb_ft_aux_table = 'test/t0';
connection default;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DEFAULT_STOPWORD;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_BEING_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG;
connection con1;
SET GLOBAL innodb_ft_aux_table = 'test/t1';
disconnect con1;
connection default;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_BEING_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG;
SELECT @@GLOBAL.innodb_ft_aux_table;
RENAME TABLE t1 TO t2;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_BEING_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG;
SELECT @@GLOBAL.innodb_ft_aux_table;
DROP TABLE t2;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_BEING_DELETED;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
SELECT * FROM INFORMATION_SCHEMA.INNODB_FT_CONFIG;
SELECT @@GLOBAL.innodb_ft_aux_table;
SET GLOBAL innodb_ft_aux_table = @save_ft_aux_table;