ASAN heap-buffer-overflow in check_key_in_list / Item_func_json_keys::val_str

call mtr.add_suppression("'utf32' can not be used as client character set");

SELECT GROUP_CONCAT(JSON_KEYS('{"foo":"bar"}')) AS f;

==614369==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61100000d5bc at pc 0x564b690b39c7 bp 0x7fdce190c2d0 sp 0x7fdce190c2c0

READ of size 1 at 0x61100000d5bc thread T5

    #0 0x564b690b39c6 in check_key_in_list /data/src/10.2/sql/item_jsonfunc.cc:3203

    #1 0x564b690b4451 in Item_func_json_keys::val_str(String*) /data/src/10.2/sql/item_jsonfunc.cc:3282

    #2 0x564b68e28ce8 in dump_leaf_key /data/src/10.2/sql/item_sum.cc:3201

    #3 0x564b68e2d36e in Item_func_group_concat::add() /data/src/10.2/sql/item_sum.cc:3587

    #4 0x564b68e3168d in Aggregator_simple::add() /data/src/10.2/sql/item_sum.h:708

    #5 0x564b68717e65 in Item_sum::aggregator_add() /data/src/10.2/sql/item_sum.h:553

    #6 0x564b68717adb in Item_sum::reset_and_add() /data/src/10.2/sql/item_sum.h:440

    #7 0x564b686f955c in init_sum_functions /data/src/10.2/sql/sql_select.cc:23859

    #8 0x564b686deac0 in end_send_group(JOIN*, st_join_table*, bool) /data/src/10.2/sql/sql_select.cc:20235

    #9 0x564b686d1988 in do_select /data/src/10.2/sql/sql_select.cc:18359

    #10 0x564b6866c13a in JOIN::exec_inner() /data/src/10.2/sql/sql_select.cc:3641

    #11 0x564b68669c51 in JOIN::exec() /data/src/10.2/sql/sql_select.cc:3436

    #12 0x564b6866d459 in mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) /data/src/10.2/sql/sql_select.cc:3836

    #13 0x564b68649efb in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.2/sql/sql_select.cc:361

    #14 0x564b685c1132 in execute_sqlcom_select /data/src/10.2/sql/sql_parse.cc:6248

    #15 0x564b685ae0d7 in mysql_execute_command(THD*) /data/src/10.2/sql/sql_parse.cc:3559

    #16 0x564b685ca6af in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.2/sql/sql_parse.cc:7763

    #17 0x564b685a36f4 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.2/sql/sql_parse.cc:1827

    #18 0x564b685a04b3 in do_command(THD*) /data/src/10.2/sql/sql_parse.cc:1381

    #19 0x564b6892866c in do_handle_one_connection(CONNECT*) /data/src/10.2/sql/sql_connect.cc:1336

    #20 0x564b68927f2f in handle_one_connection /data/src/10.2/sql/sql_connect.cc:1241

    #21 0x564b69cc414d in pfs_spawn_thread /data/src/10.2/storage/perfschema/pfs.cc:1869

    #22 0x7fdcec65d608 in start_thread /build/glibc-ZN95T4/glibc-2.31/nptl/pthread_create.c:477

    #23 0x7fdcec237292 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x122292)

0x61100000d5bc is located 0 bytes to the right of 252-byte region [0x61100000d4c0,0x61100000d5bc)

allocated by thread T5 here:

    #0 0x7fdcecbc4bc8 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10dbc8)

    #1 0x564b69de0ca0 in sf_malloc /data/src/10.2/mysys/safemalloc.c:118

    #2 0x564b69dacc05 in my_malloc /data/src/10.2/mysys/my_malloc.c:101

    #3 0x564b687a5187 in String::realloc_raw(unsigned long) /data/src/10.2/sql/sql_string.cc:102

    #4 0x564b68392976 in String::realloc_with_extra(unsigned long) /data/src/10.2/sql/sql_string.h:376

    #5 0x564b687ab022 in String::realloc_with_extra_if_needed(unsigned long) /data/src/10.2/sql/sql_string.h:388

    #6 0x564b687a7241 in String::append(char const*, unsigned long) /data/src/10.2/sql/sql_string.cc:488

    #7 0x564b690b427b in Item_func_json_keys::val_str(String*) /data/src/10.2/sql/item_jsonfunc.cc:3262

    #8 0x564b68e28ce8 in dump_leaf_key /data/src/10.2/sql/item_sum.cc:3201

    #9 0x564b68e2d36e in Item_func_group_concat::add() /data/src/10.2/sql/item_sum.cc:3587

    #10 0x564b68e3168d in Aggregator_simple::add() /data/src/10.2/sql/item_sum.h:708

    #11 0x564b68717e65 in Item_sum::aggregator_add() /data/src/10.2/sql/item_sum.h:553

    #12 0x564b68717adb in Item_sum::reset_and_add() /data/src/10.2/sql/item_sum.h:440

    #13 0x564b686f955c in init_sum_functions /data/src/10.2/sql/sql_select.cc:23859

    #14 0x564b686deac0 in end_send_group(JOIN*, st_join_table*, bool) /data/src/10.2/sql/sql_select.cc:20235

    #15 0x564b686d1988 in do_select /data/src/10.2/sql/sql_select.cc:18359

    #16 0x564b6866c13a in JOIN::exec_inner() /data/src/10.2/sql/sql_select.cc:3641

    #17 0x564b68669c51 in JOIN::exec() /data/src/10.2/sql/sql_select.cc:3436

    #18 0x564b6866d459 in mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) /data/src/10.2/sql/sql_select.cc:3836

    #19 0x564b68649efb in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.2/sql/sql_select.cc:361

    #20 0x564b685c1132 in execute_sqlcom_select /data/src/10.2/sql/sql_parse.cc:6248

    #21 0x564b685ae0d7 in mysql_execute_command(THD*) /data/src/10.2/sql/sql_parse.cc:3559

    #22 0x564b685ca6af in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.2/sql/sql_parse.cc:7763

    #23 0x564b685a36f4 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.2/sql/sql_parse.cc:1827

    #24 0x564b685a04b3 in do_command(THD*) /data/src/10.2/sql/sql_parse.cc:1381

    #25 0x564b6892866c in do_handle_one_connection(CONNECT*) /data/src/10.2/sql/sql_connect.cc:1336

    #26 0x564b68927f2f in handle_one_connection /data/src/10.2/sql/sql_connect.cc:1241

    #27 0x564b69cc414d in pfs_spawn_thread /data/src/10.2/storage/perfschema/pfs.cc:1869

    #28 0x7fdcec65d608 in start_thread /build/glibc-ZN95T4/glibc-2.31/nptl/pthread_create.c:477

Thread T5 created by T0 here:

    #0 0x7fdcecaf1805 in pthread_create (/lib/x86_64-linux-gnu/libasan.so.5+0x3a805)

    #1 0x564b69cc453e in spawn_thread_v1 /data/src/10.2/storage/perfschema/pfs.cc:1919

    #2 0x564b68345083 in inline_mysql_thread_create /data/src/10.2/include/mysql/psi/mysql_thread.h:1246

    #3 0x564b6835cc2b in create_thread_to_handle_connection(CONNECT*) /data/src/10.2/sql/mysqld.cc:6567

    #4 0x564b6835d3c6 in create_new_thread /data/src/10.2/sql/mysqld.cc:6637

    #5 0x564b6835e558 in handle_connections_sockets() /data/src/10.2/sql/mysqld.cc:6895

    #6 0x564b6835bf7c in mysqld_main(int, char**) /data/src/10.2/sql/mysqld.cc:6186

    #7 0x564b6834393c in main /data/src/10.2/sql/main.cc:25

    #8 0x7fdcec13c0b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)

SUMMARY: AddressSanitizer: heap-buffer-overflow /data/src/10.2/sql/item_jsonfunc.cc:3203 in check_key_in_list

Shadow bytes around the buggy address:

  0x0c227fff9a60: fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa fa

  0x0c227fff9a70: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd

  0x0c227fff9a80: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fa

  0x0c227fff9a90: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00

  0x0c227fff9aa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

=>0x0c227fff9ab0: 00 00 00 00 00 00 00[04]fa fa fa fa fa fa fa fa

  0x0c227fff9ac0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9ad0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9ae0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9af0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9b00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

Shadow byte legend (one shadow byte represents 8 application bytes):

  Addressable:           00

  Partially addressable: 01 02 03 04 05 06 07 

  Heap left redzone:       fa

  Freed heap region:       fd

  Stack left redzone:      f1

  Stack mid redzone:       f2

  Stack right redzone:     f3

  Stack after return:      f5

  Stack use after scope:   f8

  Global redzone:          f9

  Global init order:       f6

  Poisoned by user:        f7

  Container overflow:      fc

  Array cookie:            ac

  Intra object redzone:    bb

  ASan internal:           fe

  Left alloca redzone:     ca

  Right alloca redzone:    cb

  Shadow gap:              cc

==614369==ABORTING