MySQL Bugs: #111527: Assertion `inited == RND' failed

Bug #111527	Assertion `inited == RND' failed
Submitted:	21 Jun 2023 20:54	Modified:	22 Jun 2023 5:08
Reporter:	Yu Liang	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: DML	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 debug build) (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 ( v1 INT ) ;
INSERT INTO v0 ( v1 ) VALUES ( 0 ) ;
UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )  ;
```

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

```
mysql> UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )  ;
mbind: Operation not permitted
mysqld: /home/mysql/mysql-server/sql/handler.cc:2965: int handler::ha_rnd_next(uchar *): Assertion `inited == RND' failed.
2023-06-21T20:50:17Z UTC - mysqld got signal 6 ;
Most likely, you have hit a bug, but this error can also be caused by malfunctioning hardware.
BuildID[sha1]=c695969d774e9eb274304e1df8040ccfcea26f50
Thread pointer: 0xfffef0001040
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 = ffff84547538 thread_stack 0x100000
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(my_print_stacktrace(unsigned char const*, unsigned long)+0x60) [0x4e608c0]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(print_fatal_signal(int)+0x354) [0x1a872c4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(handle_fatal_signal+0x178) [0x1a87680]
linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffff8ec1c7a0]
/lib/aarch64-linux-gnu/libc.so.6(gsignal+0xe0) [0xffff8e28fd78]
/lib/aarch64-linux-gnu/libc.so.6(abort+0x114) [0xffff8e27caac]
/lib/aarch64-linux-gnu/libc.so.6(+0x2d490) [0xffff8e289490]
/lib/aarch64-linux-gnu/libc.so.6(+0x2d4f4) [0xffff8e2894f4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(handler::ha_rnd_next(unsigned char*)+0x4c0) [0x1df2e24]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(TableScanIterator::Read()+0x1c4) [0x21ba0e8]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(MaterializeIterator<DummyIteratorProfiler>::Read()+0x12c) [0x26a1338]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(FilterIterator::Read()+0xc0) [0x268bd14]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(NestedLoopIterator::Read()+0x134) [0x268e490]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(NestedLoopIterator::Read()+0x338) [0x268e694]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(UpdateRowsIterator::Read()+0x160) [0x18cfb88]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Query_expression::ExecuteIteratorQuery(THD*)+0xc9c) [0x18b49d0]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Query_expression::execute(THD*)+0x154) [0x18b59a0]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Sql_cmd_dml::execute_inner(THD*)+0x140) [0x17371e8]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Sql_cmd_update::execute_inner(THD*)+0x15c) [0x18c75e0]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(Sql_cmd_dml::execute(THD*)+0x7f8) [0x17351a8]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(mysql_execute_command(THD*, bool)+0x3858) [0x162a9e8]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(dispatch_sql_command(THD*, Parser_state*)+0x111c) [0x1622fac]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(dispatch_command(THD*, COM_DATA const*, enum_server_command)+0x547c) [0x161be58]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld(do_command(THD*)+0xbdc) [0x16205d4]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld() [0x1a57980]
/home/mysql/mysql-server/bld/runtime_output_directory/mysqld() [0x65570d0]
/lib/aarch64-linux-gnu/libpthread.so.0(+0x7624) [0xffff8ebc2624]
/lib/aarch64-linux-gnu/libc.so.6(+0xd149c) [0xffff8e32d49c]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (fffef00243c0): UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )
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 -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 ( v1 INT ) ;
INSERT INTO v0 ( v1 ) VALUES ( 0 ) ;
UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )  ;
```

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

Only debug mode is affected.

Hello Yu Liang,

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

regards,
Umesh

-- release build - not affected
./mtr bug111527 --nocheck-testcases
Logging: ./mtr  bug111527 --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 ( v1 INT ) ;
INSERT INTO v0 ( v1 ) VALUES ( 0 ) ;
UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )  ;
[ 50%] main.bug111527                            [ pass ]      9
[100%] shutdown_report                           [ pass ]

-- debug build - affected
 ./mtr bug111527 --nocheck-testcases --debug-server
Logging: ./mtr  bug111527 --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 ( v1 INT ) ;
INSERT INTO v0 ( v1 ) VALUES ( 0 ) ;
UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )  ;
[ 50%] main.bug111527                            [ fail ]
        Test ended at 2023-06-22 07:07:49

CURRENT_TEST: main.bug111527
mysqltest: At line 6: Query 'UPDATE v0 SET v1 = 0 WHERE ( EXISTS ( WITH v0 AS ( SELECT NULL , v1 = v1 ) SELECT v1 , v1 FROM v0 AS v3 NATURAL JOIN v0 AS v4 ) )  ' failed.
ERROR 2013 (HY000): Lost connection to MySQL server during query

-bt

#0  0x00007f589e4c1aa1 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  0x00007f589c6fb387 in raise () from /lib64/libc.so.6
#5  0x00007f589c6fca78 in abort () from /lib64/libc.so.6
#6  0x00007f589c6f41a6 in __assert_fail_base () from /lib64/libc.so.6
#7  0x00007f589c6f4252 in __assert_fail () from /lib64/libc.so.6
#8  0x0000000003345fd7 in handler::ha_rnd_next(unsigned char*) ()
#9  0x000000000346764d in TableScanIterator::Read() ()
#10 0x00000000035d0b8e in MaterializeIterator<DummyIteratorProfiler>::Read() ()
#11 0x00000000035ce33f in FilterIterator::Read() ()
#12 0x00000000035ceb94 in NestedLoopIterator::Read() ()
#13 0x00000000035cec1f in NestedLoopIterator::Read() ()
#14 0x000000000319896f in UpdateRowsIterator::Read() ()
#15 0x0000000003190a7b in Query_expression::ExecuteIteratorQuery(THD*) ()
#16 0x0000000003190b92 in Query_expression::execute(THD*) ()
#17 0x000000000311a12a in Sql_cmd_dml::execute_inner(THD*) ()
#18 0x000000000319b363 in Sql_cmd_update::execute_inner(THD*) ()
#19 0x0000000003123873 in Sql_cmd_dml::execute(THD*) ()
#20 0x00000000030c24af in mysql_execute_command(THD*, bool) ()
#21 0x00000000030c5dc9 in dispatch_sql_command(THD*, Parser_state*) ()
#22 0x00000000030c752b in dispatch_command(THD*, COM_DATA const*, enum_server_command) ()
#23 0x00000000030c926e in do_command(THD*) ()
#24 0x0000000003227bb7 in handle_connection ()
#25 0x0000000004743af9 in pfs_spawn_thread ()
#26 0x00007f589e4bcea5 in start_thread () from /lib64/libpthread.so.0
#27 0x00007f589c7c3b2d in clone () from /lib64/libc.so.6