*SAN: ERROR: AddressSanitizer: use-after-poison on address in instrings/strmake.c:36 from change_master (on optimized builds)

CHANGE MASTER TO MASTER_USER='root', MASTER_SSL=0, MASTER_SSL_CA='', MASTER_SSL_CERT='', MASTER_SSL_KEY='', MASTER_SSL_CRL='', MASTER_SSL_CRLPATH='';

CHANGE MASTER TO MASTER_USER='root', MASTER_PASSWORD='', MASTER_SSL=0;

==495272==ERROR: AddressSanitizer: use-after-poison on address 0x62b000085428 at pc 0x563152b26a8d bp 0x14c1d8064940 sp 0x14c1d8064930

READ of size 1 at 0x62b000085428 thread T14

    #0 0x563152b26a8c in strmake /test/10.5_opt/strings/strmake.c:36

    #1 0x56314f5af658 in change_master(THD*, Master_info*, bool*) /test/10.5_opt/sql/sql_repl.cc:3743

    #2 0x56314f4c367d in mysql_execute_command(THD*) /test/10.5_opt/sql/sql_parse.cc:4123

    #3 0x56314f4ec1f5 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /test/10.5_opt/sql/sql_parse.cc:7991

    #4 0x56314f49a55d in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /test/10.5_opt/sql/sql_parse.cc:1874

    #5 0x56314f492fd8 in do_command(THD*) /test/10.5_opt/sql/sql_parse.cc:1355

    #6 0x56314fb3a43e in do_handle_one_connection(CONNECT*, bool) /test/10.5_opt/sql/sql_connect.cc:1411

    #7 0x56314fb3d495 in handle_one_connection /test/10.5_opt/sql/sql_connect.cc:1313

    #8 0x5631514d3050 in pfs_spawn_thread /test/10.5_opt/storage/perfschema/pfs.cc:2201

    #9 0x14c1f94716da in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x76da)

    #10 0x14c1f72fc88e in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x12188e)

0x62b000085428 is located 552 bytes inside of 24624-byte region [0x62b000085200,0x62b00008b230)

allocated by thread T14 here:

    #0 0x56314eefb420 in __interceptor_malloc (/test/ASAN_MD280520-mariadb-10.5.4-linux-x86_64-opt/bin/mariadbd+0x56c5420)

    #1 0x563152973587 in my_malloc /test/10.5_opt/mysys/my_malloc.c:88

    #2 0x56315295287b in reset_root_defaults /test/10.5_opt/mysys/my_alloc.c:147

    #3 0x56314f2464e5 in THD::init_for_queries() /test/10.5_opt/sql/sql_class.cc:1400

    #4 0x56314fb35bdc in prepare_new_connection_state(THD*) /test/10.5_opt/sql/sql_connect.cc:1240

    #5 0x56314fb372dd in thd_prepare_connection(THD*) /test/10.5_opt/sql/sql_connect.cc:1334

    #6 0x56314fb3a3e6 in do_handle_one_connection(CONNECT*, bool) /test/10.5_opt/sql/sql_connect.cc:1401

    #7 0x56314fb3d495 in handle_one_connection /test/10.5_opt/sql/sql_connect.cc:1313

    #8 0x5631514d3050 in pfs_spawn_thread /test/10.5_opt/storage/perfschema/pfs.cc:2201

    #9 0x14c1f94716da in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x76da)

Thread T14 created by T0 here:

    #0 0x56314ee5462f in pthread_create (/test/ASAN_MD280520-mariadb-10.5.4-linux-x86_64-opt/bin/mariadbd+0x561e62f)

    #1 0x5631514e5984 in my_thread_create /test/10.5_opt/storage/perfschema/my_thread.h:34

    #2 0x5631514e5984 in pfs_spawn_thread_v1 /test/10.5_opt/storage/perfschema/pfs.cc:2252

    #3 0x56314ef4bb86 in inline_mysql_thread_create /test/10.5_opt/include/mysql/psi/mysql_thread.h:1321

    #4 0x56314ef4bb86 in create_thread_to_handle_connection(CONNECT*) /test/10.5_opt/sql/mysqld.cc:5952

    #5 0x56314ef5de9f in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /test/10.5_opt/sql/mysqld.cc:6076

    #6 0x56314ef5ee14 in handle_connections_sockets() /test/10.5_opt/sql/mysqld.cc:6203

    #7 0x56314ef61426 in mysqld_main(int, char**) /test/10.5_opt/sql/mysqld.cc:5621

    #8 0x14c1f71fcb96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

SUMMARY: AddressSanitizer: use-after-poison /test/10.5_opt/strings/strmake.c:36 in strmake

Shadow bytes around the buggy address:

  0x0c5680008a30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c5680008a40: 00 00 00 00 00 00 f7 00 00 00 00 00 00 00 00 00

  0x0c5680008a50: 00 00 00 00 00 00 00 00 00 00 00 04 f7 00 00 00

  0x0c5680008a60: 00 00 00 00 00 06 f7 05 f7 01 f7 02 f7 f7 f7 f7

  0x0c5680008a70: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

=>0x0c5680008a80: f7 f7 f7 f7 f7[f7]f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

  0x0c5680008a90: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

  0x0c5680008aa0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

  0x0c5680008ab0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

  0x0c5680008ac0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

  0x0c5680008ad0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7

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

Compiled with GCC >=7.5.0 and:

    -DWITH_ASAN=ON -DWITH_ASAN_SCOPE=ON -DWITH_UBSAN=ON -DWITH_RAPID=OFF

Set before execution: 

    export ASAN_OPTIONS=quarantine_size_mb=512:atexit=true:detect_invalid_pointer_pairs=1:dump_instruction_bytes=true:abort_on_error=1