MySQL Bugs: #111404: Assertion `is

Bug #111404	Assertion `is_prepared()' failed.
Submitted:	13 Jun 2023 18:26	Modified:	14 Jun 2023 5:05
Reporter:	Yu Liang	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Stored Routines	Severity:	S6 (Debug Builds)
Version:	8.0.33	OS:	Ubuntu (20.04 LTS)
Assigned to:		CPU Architecture:	x86 (Intel(R) Core(TM) i7-10700 CPU)

Description:
The latest version of the MySQL Server (version 8.0.33) (git commit hash: ea7087d8850) crashes with Assertion Failure when executing the following query:

Config from "/etc/mysql/conf.d/mysql.cnf":

```
[mysqld]
sql_mode = "NO_ENGINE_SUBSTITUTION"
```

```sql
drop database if exists test123;
create database test123;
use test123;
create table v0(c1 INT);
CREATE PROCEDURE p3 ( ) CREATE TABLE v2 ( CHECK ( ( select 'abc' ) ) ) AS TABLE v0 ;
CALL p3;
```

In the debug build, the server crashes with the following stack trace: 

```
mysql> CALL p3;
mysqld: /home/mysql/mysql-server/sql/sql_lex.cc:3853: bool Query_expression::save_cmd_properties(THD *): Assertion `is_prepared()' failed.
2023-06-13T18:21:59Z UTC - mysqld got signal 6 ;
Most likely, you have hit a bug, but this error can also be caused by malfunctioning hardware.
BuildID[sha1]=1d55d4671b7469352fc317efb0121b604c26443d
Thread pointer: 0xfffef8001040
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = ffff9c10f538 thread_stack 0x100000
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(my_print_stacktrace(unsigned char const*, unsigned long)+0x60) [0x4e6bc30]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(print_fatal_signal(int)+0x340) [0x1a89320]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(handle_fatal_signal+0x16c) [0x1a896dc]
linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffffa07b27a0]
/lib/aarch64-linux-gnu/libc.so.6(gsignal+0xe0) [0xffff9fe26d78]
/lib/aarch64-linux-gnu/libc.so.6(abort+0x114) [0xffff9fe13aac]
/lib/aarch64-linux-gnu/libc.so.6(+0x2d490) [0xffff9fe20490]
/lib/aarch64-linux-gnu/libc.so.6(+0x2d4f4) [0xffff9fe204f4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Query_block::save_cmd_properties(THD*)+0) [0x15a3338]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Query_block::save_cmd_properties(THD*)+0x9c) [0x15a33d4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Query_expression::save_cmd_properties(THD*)+0x140) [0x15a32b4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Sql_cmd_create_table::execute(THD*)+0x21f4) [0x2573be0]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(mysql_execute_command(THD*, bool)+0x3884) [0x162cd40]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(sp_instr_stmt::exec_core(THD*, unsigned int*)+0xc4) [0x13f8984]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(sp_lex_instr::reset_lex_and_exec_core(THD*, unsigned int*, bool)+0x50c) [0x13f46bc]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(sp_lex_instr::validate_lex_and_execute_core(THD*, unsigned int*, bool)+0x29c) [0x13f652c]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(sp_instr_stmt::execute(THD*, unsigned int*)+0x3d0) [0x13f7458]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(sp_head::execute(THD*, bool)+0xbbc) [0x13dc358]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(sp_head::execute_procedure(THD*, mem_root_deque<Item*>*)+0x10e8) [0x13e0e68]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Sql_cmd_call::execute_inner(THD*)+0x21c) [0x2564328]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Sql_cmd_dml::execute(THD*)+0x7a0) [0x1737e1c]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(mysql_execute_command(THD*, bool)+0x281c) [0x162bcd8]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(dispatch_sql_command(THD*, Parser_state*)+0x1124) [0x16252c0]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(dispatch_command(THD*, COM_DATA const*, enum_server_command)+0x5434) [0x161e224]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(do_command(THD*)+0xb8c) [0x16228f4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld() [0x1a59a64]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld() [0x655c1a0]
/lib/aarch64-linux-gnu/libpthread.so.0(+0x7624) [0xffffa0758624]
/lib/aarch64-linux-gnu/libc.so.6(+0xd149c) [0xffff9fec449c]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (fffef81fde90): CREATE TABLE v2 ( CHECK ( ( select 'abc' ) ) ) AS TABLE v0
Connection ID (thread ID): 8
Status: NOT_KILLED
```

How to repeat:
Steps to repeat the Assertion Failure:
1. Download the MySQL Server source code from the official github repo: `https://github.com/mysql/mysql-server`
2. Checkout to the latest mysql released version: 8.0.33 (hash: `ea7087d8850`)
3. Compile MySQL using the command: 

```
mkdir -p bld
cd bld
cmake .. -DDOWNLOAD_BOOST=1 -DWITH_BOOST=../boost -DWITH_UNIT_TESTS=OFF -DUSE_LD_GOLD=1 -DWITH_DEBUG=1
make
```

4. Run the MySQL Server with command: 

```
./bin/mysqld --basedir=$(pwd) --datadir=$(pwd)/data_all/ori_data --port=7000  --socket=/tmp/mysql_0.sock --mysqlx=OFF --performance_schema=OFF
```

5. Setup the MySQL Server config in the path: "/etc/mysql/conf.d/mysql.cnf"

```
[mysqld]
sql_mode = "NO_ENGINE_SUBSTITUTION"
```

6. Run the MySQL Client with the PoC:

```
./bin/mysql --port=7000 --user=root --socket=/tmp/mysql_0.sock < poc_0.sql
```

where `poc_0.sql` is:

```sql
drop database if exists test123;
create database test123;
use test123;
create table v0(c1 INT);
CREATE PROCEDURE p3 ( ) CREATE TABLE v2 ( CHECK ( ( select 'abc' ) ) ) AS TABLE v0 ;
CALL p3;
```

Suggested fix:
The server should continue running instead of crashing by Assertion Failure.

Hello Yu Liang,

Thank you for the report and test case.
Observed that 8.0.33 only debug build is affected.

regards,
Umesh

-- release build
./mtr bug111404 --nocheck-testcases
Logging: ./mtr  bug111404 --nocheck-testcases
MySQL Version 8.0.33
Checking supported features
Using 'all' suites
Collecting tests
Checking leftover processes
Removing old var directory
 - WARNING: Using the 'mysql-test/var' symlink
Creating var directory '/export/home/tmp/ushastry/mysql-8.0.33/mysql-test/var'
Installing system database
Using parallel: 1

==============================================================================
                  TEST NAME                       RESULT  TIME (ms) COMMENT
------------------------------------------------------------------------------
drop database if exists test123;
Warnings:
Note    1008    Can't drop database 'test123'; database doesn't exist
create database test123;
use test123;
create table v0(c1 INT);
CREATE PROCEDURE p3 ( ) CREATE TABLE v2 ( CHECK ( ( select 'abc' ) ) ) AS TABLE v0 ;
CALL p3;
[ 50%] main.bug111404                            [ fail ]
        Test ended at 2023-06-14 07:03:28

CURRENT_TEST: main.bug111404
mysqltest: At line 6: Query 'CALL p3' failed.
ERROR 3812 (HY000): An expression of non-boolean type specified to a check constraint 'v2_chk_1'.

-- debug build - affected

 ./mtr bug111404 --nocheck-testcases  --debug-server
Logging: ./mtr  bug111404 --nocheck-testcases --debug-server
MySQL Version 8.0.33
Checking supported features
 - Binaries are debug compiled
Using 'all' suites
Collecting tests
Checking leftover processes
Removing old var directory
 - WARNING: Using the 'mysql-test/var' symlink
Creating var directory '/export/home/tmp/ushastry/mysql-8.0.33/mysql-test/var'
Installing system database
Using parallel: 1

==============================================================================
                  TEST NAME                       RESULT  TIME (ms) COMMENT
------------------------------------------------------------------------------
drop database if exists test123;
Warnings:
Note    1008    Can't drop database 'test123'; database doesn't exist
create database test123;
use test123;
create table v0(c1 INT);
CREATE PROCEDURE p3 ( ) CREATE TABLE v2 ( CHECK ( ( select 'abc' ) ) ) AS TABLE v0 ;
CALL p3;
[ 50%] main.bug111404                            [ fail ]
        Test ended at 2023-06-14 07:04:52

CURRENT_TEST: main.bug111404
mysqltest: At line 6: Query 'CALL p3' failed.
ERROR 2013 (HY000): Lost connection to MySQL server during query

.
#0  0x00007f9602475aa1 in pthread_kill () from /lib64/libpthread.so.0
#1  0x0000000003f9296e in my_write_core(int) ()
#2  0x00000000032365f5 in handle_fatal_signal ()
#3  <signal handler called>
#4  0x00007f96006af387 in raise () from /lib64/libc.so.6
#5  0x00007f96006b0a78 in abort () from /lib64/libc.so.6
#6  0x00007f96006a81a6 in __assert_fail_base () from /lib64/libc.so.6
#7  0x00007f96006a8252 in __assert_fail () from /lib64/libc.so.6
#8  0x000000000309257a in Query_expression::save_cmd_properties(THD*) ()
#9  0x000000000309247b in Query_block::save_cmd_properties(THD*) ()
#10 0x0000000003092551 in Query_expression::save_cmd_properties(THD*) ()
#11 0x0000000002ff42ff in LEX::save_cmd_properties(THD*) ()
#12 0x0000000003579272 in Sql_cmd_create_table::execute(THD*) ()
#13 0x00000000030c24af in mysql_execute_command(THD*, bool) ()
#14 0x00000000030027ca in sp_instr_stmt::exec_core(THD*, unsigned int*) ()
#15 0x0000000003003f8f in sp_lex_instr::reset_lex_and_exec_core(THD*, unsigned int*, bool) ()
#16 0x00000000030044cd in sp_lex_instr::validate_lex_and_execute_core(THD*, unsigned int*, bool) ()
#17 0x0000000003004cc2 in sp_instr_stmt::execute(THD*, unsigned int*) ()
#18 0x0000000002ffa16f in sp_head::execute(THD*, bool) ()
#19 0x0000000002ffb6e5 in sp_head::execute_procedure(THD*, mem_root_deque<Item*>*) ()
#20 0x0000000003574717 in Sql_cmd_call::execute_inner(THD*) ()
#21 0x0000000003123873 in Sql_cmd_dml::execute(THD*) ()
#22 0x00000000030c4964 in mysql_execute_command(THD*, bool) ()
#23 0x00000000030c5dc9 in dispatch_sql_command(THD*, Parser_state*) ()
#24 0x00000000030c752b in dispatch_command(THD*, COM_DATA const*, enum_server_command) ()
#25 0x00000000030c926e in do_command(THD*) ()
#26 0x0000000003227bb7 in handle_connection ()
#27 0x0000000004743af9 in pfs_spawn_thread ()
#28 0x00007f9602470ea5 in start_thread () from /lib64/libpthread.so.0
#29 0x00007f9600777b2d in clone () from /lib64/libc.so.6