MemorySanitizer: use-of-uninitialized-value myrocks::Rdb_key_def::pack_field

CURRENT_TEST: rocksdb.issue896

mysqltest: At line 12: query 'INSERT INTO t1 VALUES (100, 'aaabbb', UNIX_TIMESTAMP(), 200)' failed: <Unknown> (2013): Lost connection to server during query

The result from queries just before the failure was:

CREATE TABLE `t1` (

`a` bigint(20) NOT NULL,

`b` varchar(10) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,

`u` bigint(20) unsigned NOT NULL,

`d` bigint(20) DEFAULT NULL,

PRIMARY KEY (`a`,`b`),

KEY `d` (`d`)

) ENGINE=ROCKSDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='ttl_duration=1000;ttl_col=u';

INSERT INTO t1 VALUES (100, 'aaabbb', UNIX_TIMESTAMP(), 200);

Server [mysqld.1 - pid: 727326, winpid: 727326, exit: 256] failed during test run

Server log from this test:

----------SERVER LOG START-----------

2025-08-27  3:01:53 16 [Note] RocksDB: Manual memtable flush.

==727327==WARNING: MemorySanitizer: use-of-uninitialized-value

    #0 0xffffad4d12bc in myrocks::Rdb_key_def::pack_field(Field*, myrocks::Rdb_field_packing*, unsigned char*, unsigned char*, unsigned char*, myrocks::Rdb_string_writer*, unsigned int*) const /source/storage/rocksdb/rdb_datadic.cc:1247:5

    #1 0xffffad4c9ba8 in myrocks::Rdb_key_def::pack_record(TABLE const*, unsigned char*, unsigned char const*, unsigned char*, myrocks::Rdb_string_writer*, bool, long long, unsigned int, unsigned int*, char const*) const /source/storage/rocksdb/rdb_datadic.cc:1391:13

    #2 0xffffad0affe8 in myrocks::ha_rocksdb::get_pk_for_update(myrocks::ha_rocksdb::update_row_info*) /source/storage/rocksdb/ha_rocksdb.cc:9684:24

    #3 0xffffad0af064 in myrocks::ha_rocksdb::update_write_row(unsigned char const*, unsigned char const*, bool) /source/storage/rocksdb/ha_rocksdb.cc:10390:12

    #4 0xffffad0ae5fc in myrocks::ha_rocksdb::write_row(unsigned char const*) /source/storage/rocksdb/ha_rocksdb.cc:9631:18

    #5 0xaaaad5ea19c4 in handler::ha_write_row(unsigned char const*) /source/sql/handler.cc:7765:3

    #6 0xaaaad4233be4 in Write_record::single_insert(unsigned long long*) /source/sql/sql_insert.cc:2315:27

    #7 0xaaaad42227ac in Write_record::write_record() /source/sql/sql_insert.cc:2357:10

    #8 0xaaaad42139e8 in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item>>&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /source/sql/sql_insert.cc:1217:22

    #9 0xaaaad446b194 in mysql_execute_command(THD*, bool) /source/sql/sql_parse.cc:4628:10

    #10 0xaaaad44301ac in mysql_parse(THD*, char*, unsigned int, Parser_state*) /source/sql/sql_parse.cc:8180:18

    #11 0xaaaad4421f5c in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /source/sql/sql_parse.cc:1906:7

    #12 0xaaaad4434288 in do_command(THD*, bool) /source/sql/sql_parse.cc:1419:17

    #13 0xaaaad5052dbc in do_handle_one_connection(CONNECT*, bool) /source/sql/sql_connect.cc:1386:11

    #14 0xaaaad5051b80 in handle_one_connection /source/sql/sql_connect.cc:1298:5

    #15 0xaaaad74a51d8 in pfs_spawn_thread /source/storage/perfschema/pfs.cc:2201:3

    #16 0xffffb81aee9c  (/lib/aarch64-linux-gnu/libc.so.6+0x7ee9c) (BuildId: 16e7fc798f754633a38d91ba09be84f8aa839464)

    #17 0xffffb8217b18  (/lib/aarch64-linux-gnu/libc.so.6+0xe7b18) (BuildId: 16e7fc798f754633a38d91ba09be84f8aa839464)

  Uninitialized value was stored to memory at

    #0 0xffffad4d12b8 in myrocks::Rdb_key_def::pack_field(Field*, myrocks::Rdb_field_packing*, unsigned char*, unsigned char*, unsigned char*, myrocks::Rdb_string_writer*, unsigned int*) const /source/storage/rocksdb/rdb_datadic.cc:1247:53

    #1 0xffffad4c9ba8 in myrocks::Rdb_key_def::pack_record(TABLE const*, unsigned char*, unsigned char const*, unsigned char*, myrocks::Rdb_string_writer*, bool, long long, unsigned int, unsigned int*, char const*) const /source/storage/rocksdb/rdb_datadic.cc:1391:13

    #2 0xffffad0affe8 in myrocks::ha_rocksdb::get_pk_for_update(myrocks::ha_rocksdb::update_row_info*) /source/storage/rocksdb/ha_rocksdb.cc:9684:24

    #3 0xffffad0af064 in myrocks::ha_rocksdb::update_write_row(unsigned char const*, unsigned char const*, bool) /source/storage/rocksdb/ha_rocksdb.cc:10390:12

    #4 0xffffad0ae5fc in myrocks::ha_rocksdb::write_row(unsigned char const*) /source/storage/rocksdb/ha_rocksdb.cc:9631:18

    #5 0xaaaad5ea19c4 in handler::ha_write_row(unsigned char const*) /source/sql/handler.cc:7765:3

    #6 0xaaaad4233be4 in Write_record::single_insert(unsigned long long*) /source/sql/sql_insert.cc:2315:27

    #7 0xaaaad42227ac in Write_record::write_record() /source/sql/sql_insert.cc:2357:10

    #8 0xaaaad42139e8 in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item>>&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /source/sql/sql_insert.cc:1217:22

    #9 0xaaaad446b194 in mysql_execute_command(THD*, bool) /source/sql/sql_parse.cc:4628:10

    #10 0xaaaad44301ac in mysql_parse(THD*, char*, unsigned int, Parser_state*) /source/sql/sql_parse.cc:8180:18

    #11 0xaaaad4421f5c in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /source/sql/sql_parse.cc:1906:7

    #12 0xaaaad4434288 in do_command(THD*, bool) /source/sql/sql_parse.cc:1419:17

    #13 0xaaaad5052dbc in do_handle_one_connection(CONNECT*, bool) /source/sql/sql_connect.cc:1386:11

    #14 0xaaaad5051b80 in handle_one_connection /source/sql/sql_connect.cc:1298:5

    #15 0xaaaad74a51d8 in pfs_spawn_thread /source/storage/perfschema/pfs.cc:2201:3

    #16 0xffffb81aee9c  (/lib/aarch64-linux-gnu/libc.so.6+0x7ee9c) (BuildId: 16e7fc798f754633a38d91ba09be84f8aa839464)

    #17 0xffffb8217b18  (/lib/aarch64-linux-gnu/libc.so.6+0xe7b18) (BuildId: 16e7fc798f754633a38d91ba09be84f8aa839464)

  Memory was marked as uninitialized

    #0 0xaaaad392904c in __msan_allocated_memory (/build/sql/mariadbd+0x8e904c) (BuildId: 9dd701de71e83bd1f05cacbc2ecf30f2aedbfe5a)

    #1 0xaaaad92762bc in my_malloc /source/mysys/my_malloc.c:119:7

    #2 0xffffad4b411c in myrocks::Rdb_key_def::setup(TABLE const*, myrocks::Rdb_tbl_def const*) /source/storage/rocksdb/rdb_datadic.cc:459:47

    #3 0xffffad07e10c in myrocks::ha_rocksdb::create_key_def(TABLE const*, unsigned int, myrocks::Rdb_tbl_def const*, std::__1::shared_ptr<myrocks::Rdb_key_def>*, myrocks::ha_rocksdb::key_def_cf_info const&, unsigned long long, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) const /source/storage/rocksdb/ha_rocksdb.cc:7589:3

    #4 0xffffad07adf0 in myrocks::ha_rocksdb::create_key_defs(TABLE const*, myrocks::Rdb_tbl_def*, TABLE const*, myrocks::Rdb_tbl_def const*) const /source/storage/rocksdb/ha_rocksdb.cc:7180:11

    #5 0xffffad087e24 in myrocks::ha_rocksdb::create_table(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, TABLE const*, unsigned long long) /source/storage/rocksdb/ha_rocksdb.cc:7766:9

    #6 0xffffad08a53c in myrocks::ha_rocksdb::create(char const*, TABLE*, HA_CREATE_INFO*) /source/storage/rocksdb/ha_rocksdb.cc:7913:3

    #7 0xaaaad5e703c0 in handler::ha_create(char const*, TABLE*, HA_CREATE_INFO*) /source/sql/handler.cc:5644:14

    #8 0xaaaad5e7c7dc in ha_create_table(THD*, char const*, char const*, char const*, HA_CREATE_INFO*, st_mysql_const_unsigned_lex_string*, bool) /source/sql/handler.cc:6115:22

    #9 0xaaaad4b860e4 in create_table_impl(THD*, st_ddl_log_state*, st_ddl_log_state*, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, DDL_options_st, HA_CREATE_INFO*, Alter_info*, int, bool*, st_key**, unsigned int*, st_mysql_const_unsigned_lex_string*) /source/sql/sql_table.cc:4852:11

    #10 0xaaaad4b80cc4 in mysql_create_table_no_lock(THD*, st_ddl_log_state*, st_ddl_log_state*, Table_specification_st*, Alter_info*, bool*, int, TABLE_LIST*) /source/sql/sql_table.cc:4954:8

    #11 0xaaaad4c12c08 in mysql_create_table(THD*, TABLE_LIST*, Table_specification_st*, Alter_info*) /source/sql/sql_table.cc:5197:7

    #12 0xaaaad4c0a350 in Sql_cmd_create_table_like::execute(THD*) /source/sql/sql_table.cc:13144:12

    #13 0xaaaad448c6c8 in mysql_execute_command(THD*, bool) /source/sql/sql_parse.cc:6165:26

    #14 0xaaaad44301ac in mysql_parse(THD*, char*, unsigned int, Parser_state*) /source/sql/sql_parse.cc:8180:18

    #15 0xaaaad4421f5c in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /source/sql/sql_parse.cc:1906:7

    #16 0xaaaad4434288 in do_command(THD*, bool) /source/sql/sql_parse.cc:1419:17

    #17 0xaaaad5052dbc in do_handle_one_connection(CONNECT*, bool) /source/sql/sql_connect.cc:1386:11

    #18 0xaaaad5051b80 in handle_one_connection /source/sql/sql_connect.cc:1298:5

    #19 0xaaaad74a51d8 in pfs_spawn_thread /source/storage/perfschema/pfs.cc:2201:3

SUMMARY: MemorySanitizer: use-of-uninitialized-value /source/storage/rocksdb/rdb_datadic.cc:1247:5 in myrocks::Rdb_key_def::pack_field(Field*, myrocks::Rdb_field_packing*, unsigned char*, unsigned char*, unsigned char*, myrocks::Rdb_string_writer*, unsigned int*) const

Exiting

250827  3:01:55 [ERROR] /build/sql/mariadbd got signal 6 ;

Sorry, we probably made a mistake, and this is a bug.