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MariaDB
Commit 445ac662 authored by Sergei Golubchik's avatar Sergei Golubchik
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MDEV-15755 Query crashing MariaDB in cleanup_after_query 

set the pointer to NULL to avoid double-free
when the item is cleaned up many times

(once in JOIN_TAB::cleanup(): tmp->jtbm_subselect->cleanup()
and once at the end of the query, with all other items)
parent 93efa48a
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Inline Side-by-side
Showing with 378 additions and 0 deletions
mysql-test/r/subselect-crash_15755.result 0 → 100644
View file @ 445ac662
set global innodb_stats_persistent= 1;
drop table if exists t1;
Warnings:
Note 1051 Unknown table 'test.t1'
create table t1 (
f1 bigint(20) default 0,
f2 varchar(50) default '',
f3 int(10) default 0,
f4 bigint(20) default 0,
f5 bigint(20) default 0,
f6 varchar(50) default '',
f7 varchar(64) default '',
f8 varchar(30) default '',
f9 varchar(30) default '',
f10 bigint(20) default 0,
f11 bigint(20) default 0,
f12 bigint(20) default 0,
f13 bigint(20) default 0,
f14 varchar(50) default '',
f15 varchar(100) default '',
f16 varchar(30) default '',
f17 varchar(40) default '',
f18 varchar(30) default '',
f19 varchar(10) default '',
f20 varchar(30) default '',
f21 int(10) default 0,
f22 int(10) default 0,
f23 int(10) default 0,
f24 int(10) default 0,
f25 varchar(20) default '',
f26 varchar(20) default '',
f27 varchar(100) default '',
f28 varchar(55) default '',
f29 varchar(20) default '',
f30 varchar(100) default '',
f31 varchar(30) default '',
f32 varchar(20) default '',
f33 int(10) default 0,
f34 int(10) default 0,
f35 varchar(30) default '',
f36 varchar(30) default '',
f37 varchar(30) default '',
f38 varchar(20) default '',
f39 tinyint(4) default 0,
f40 tinyint(4) default 0,
f41 bigint(20) default 0,
f42 varchar(50) default '',
f43 varchar(50) default '',
f44 varchar(50) default '',
f45 int(10) default 0,
f46 tinyint(1) default 0
) engine=innodb row_format=dynamic;
insert into t1 () values (),(),(),(),(),(),(),(),(),(),(),(),(),(),(),();
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
select * from t1 where f2 in (select f2 from t1 group by f2 having count(distinct f3) = 1);
f1 f2 f3 f4 f5 f6 f7 f8 f9 f10 f11 f12 f13 f14 f15 f16 f17 f18 f19 f20 f21 f22 f23 f24 f25 f26 f27 f28 f29 f30 f31 f32 f33 f34 f35 f36 f37 f38 f39 f40 f41 f42 f43 f44 f45 f46
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drop table t1;
set global innodb_stats_persistent= 0;
mysql-test/t/subselect-crash_15755.test 0 → 100644
View file @ 445ac662
--source include/have_innodb.inc
set global innodb_stats_persistent= 1;
drop table if exists t1;
create table t1 (
f1 bigint(20) default 0,
f2 varchar(50) default '',
f3 int(10) default 0,
f4 bigint(20) default 0,
f5 bigint(20) default 0,
f6 varchar(50) default '',
f7 varchar(64) default '',
f8 varchar(30) default '',
f9 varchar(30) default '',
f10 bigint(20) default 0,
f11 bigint(20) default 0,
f12 bigint(20) default 0,
f13 bigint(20) default 0,
f14 varchar(50) default '',
f15 varchar(100) default '',
f16 varchar(30) default '',
f17 varchar(40) default '',
f18 varchar(30) default '',
f19 varchar(10) default '',
f20 varchar(30) default '',
f21 int(10) default 0,
f22 int(10) default 0,
f23 int(10) default 0,
f24 int(10) default 0,
f25 varchar(20) default '',
f26 varchar(20) default '',
f27 varchar(100) default '',
f28 varchar(55) default '',
f29 varchar(20) default '',
f30 varchar(100) default '',
f31 varchar(30) default '',
f32 varchar(20) default '',
f33 int(10) default 0,
f34 int(10) default 0,
f35 varchar(30) default '',
f36 varchar(30) default '',
f37 varchar(30) default '',
f38 varchar(20) default '',
f39 tinyint(4) default 0,
f40 tinyint(4) default 0,
f41 bigint(20) default 0,
f42 varchar(50) default '',
f43 varchar(50) default '',
f44 varchar(50) default '',
f45 int(10) default 0,
f46 tinyint(1) default 0
) engine=innodb row_format=dynamic;
insert into t1 () values (),(),(),(),(),(),(),(),(),(),(),(),(),(),(),();
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
select * from t1 where f2 in (select f2 from t1 group by f2 having count(distinct f3) = 1);
drop table t1;
set global innodb_stats_persistent= 0;
sql/item_subselect.cc
View file @ 445ac662
......@@ -156,6 +156,7 @@ void Item_subselect::cleanup()
reset();
filesort_buffer.free_sort_buffer();
my_free(sortbuffer.str);
sortbuffer= null_lex_str;
value_assigned= 0;
expr_cache= 0;
......
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