MSAN use-of-uninitialized-value in collect_statistics_for_table()

CURRENT_TEST: innodb.analyze_table

mysqltest: At line 36: query 'ANALYZE TABLE t1' failed: 2013: Lost connection to MySQL server during query

…

Version: '10.5.3-MariaDB-debug-log'  socket: '/dev/shm/10.5m/mysql-test/var/tmp/35/mysqld.1.sock'  port: 16660  Source distribution

Uninitialized bytes in __interceptor_write at offset 3 inside [0x731000078018, 65536)

==1437866==WARNING: MemorySanitizer: use-of-uninitialized-value

    #0 0x564d8d0f0835 in my_write /mariadb/10.5m/mysys/my_write.c:49:19

    #1 0x564d8d01e6de in inline_mysql_file_write /mariadb/10.5m/include/mysql/psi/mysql_file.h:1176:11

    #2 0x564d8d01e6de in _my_b_cache_write /mariadb/10.5m/mysys/mf_iocache.c:1765:7

    #3 0x564d8d012292 in my_b_flush_io_cache /mariadb/10.5m/mysys/mf_iocache.c:1964:18

    #4 0x564d8d0139ba in _my_b_write /mariadb/10.5m/mysys/mf_iocache.c:612:7

    #5 0x564d8a4eab61 in my_b_write(st_io_cache*, unsigned char const*, unsigned long) /mariadb/10.5m/include/my_sys.h:544:10

    #6 0x564d8a4eab61 in unique_write_to_file_with_count(unsigned char*, unsigned int, Unique*) /mariadb/10.5m/sql/uniques.cc:56:10

    #7 0x564d8d11e7a0 in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:590:9

    #8 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #9 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #10 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #11 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #12 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #13 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #14 0x564d8d11e6ac in tree_walk_left_root_right /mariadb/10.5m/mysys/tree.c:588:16

    #15 0x564d8d11e49e in tree_walk /mariadb/10.5m/mysys/tree.c:576:12

    #16 0x564d8a4ec7fc in Unique::flush() /mariadb/10.5m/sql/uniques.cc:385:7

    #17 0x564d8a2e7a56 in Unique::unique_add(void*) /mariadb/10.5m/sql/uniques.h:64:50

    #18 0x564d8a2c38bd in Column_statistics_collected::add() /mariadb/10.5m/sql/sql_statistics.cc:2466:28

    #19 0x564d8a2c38bd in collect_statistics_for_table(THD*, TABLE*) /mariadb/10.5m/sql/sql_statistics.cc:2776:50

    #20 0x564d8a5f50fe in mysql_admin_table(THD*, TABLE_LIST*, st_ha_check_opt*, char const*, thr_lock_type, bool, bool, unsigned int, int (*)(THD*, TABLE_LIST*, st_ha_check_opt*), int (handler::*)(THD*, st_ha_check_opt*), int (*)(THD*, TABLE_LIST*, st_ha_check_opt*)) /mariadb/10.5m/sql/sql_admin.cc:888:15

    #21 0x564d8a5f8ca2 in Sql_cmd_analyze_table::execute(THD*) /mariadb/10.5m/sql/sql_admin.cc:1315:8

    #22 0x564d89fa41d1 in mysql_execute_command(THD*) /mariadb/10.5m/sql/sql_parse.cc:5908:26

    #23 0x564d89f8c17e in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /mariadb/10.5m/sql/sql_parse.cc:7953:18

    #24 0x564d89f7e543 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /mariadb/10.5m/sql/sql_parse.cc:1839:7

    #25 0x564d89f8ec74 in do_command(THD*) /mariadb/10.5m/sql/sql_parse.cc:1358:17

    #26 0x564d8a5a76fb in do_handle_one_connection(CONNECT*, bool) /mariadb/10.5m/sql/sql_connect.cc:1422:11

    #27 0x564d8a5a6d66 in handle_one_connection /mariadb/10.5m/sql/sql_connect.cc:1319:5

    #28 0x564d8ba41287 in pfs_spawn_thread /mariadb/10.5m/storage/perfschema/pfs.cc:2201:3

    #29 0x7f56d3931f26 in start_thread /build/glibc-WZtAaN/glibc-2.30/nptl/pthread_create.c:479:8

    #30 0x7f56d34102ee in clone /build/glibc-WZtAaN/glibc-2.30/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:95

  Uninitialized value was stored to memory at

    #0 0x564d89a32c26 in __msan_memcpy (/dev/shm/10.5m/sql/mariadbd+0x6f7c26)

    #1 0x564d8a4eab9b in my_b_write(st_io_cache*, unsigned char const*, unsigned long) /mariadb/10.5m/include/my_sys.h:540:5

    #2 0x564d8a4eab9b in unique_write_to_file_with_count(unsigned char*, unsigned int, Unique*) /mariadb/10.5m/sql/uniques.cc:56:10

  Uninitialized value was stored to memory at

    #0 0x564d89a32c26 in __msan_memcpy (/dev/shm/10.5m/sql/mariadbd+0x6f7c26)

    #1 0x564d8d119ff6 in tree_insert /mariadb/10.5m/mysys/tree.c

  Memory was marked as uninitialized

    #0 0x564d89a393ae in __msan_allocated_memory (/dev/shm/10.5m/sql/mariadbd+0x6fe3ae)

    #1 0x564d8c4e6ce9 in row_sel_field_store_in_mysql_format_func(unsigned char*, mysql_row_templ_t const*, dict_index_t const*, unsigned long, unsigned char const*, unsigned long) /mariadb/10.5m/storage/innobase/row/row0sel.cc:2703:2