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  1. MariaDB Server
  2. MDEV-29018

AddressSanitizer errors in ha_spider::field_exchange with UNION on partitioned table

Details

    Description

      --source plugin/spider/spider/include/init_spider.inc
      --source include/have_partition.inc
       
      SET spider_same_server_link= on;
      eval create server s foreign data wrapper mysql options (host "127.0.0.1", database "test", user "root", port $MASTER_MYPORT);
       
      CREATE TABLE t1 (a INT);
      INSERT INTO t1 VALUES (1),(2);
      CREATE TABLE t2 (a INT);
      INSERT INTO t2 VALUES (3),(4);
       
      CREATE TABLE t_spider (a INT) ENGINE=SPIDER PARTITION BY HASH(a) (
        PARTITION p1 COMMENT = "wrapper 'mysql', srv 's', table 't1'",
        PARTITION p2 COMMENT = "wrapper 'mysql', srv 's', table 't2'"  
      );
       
      SELECT DISTINCT a FROM t_spider UNION SELECT a FROM t_spider;
       
      # Cleanup
      DROP TABLE t_spider, t1, t2;
       
      --source plugin/spider/spider/include/deinit_spider.inc
      

      10.3 be99d0dd

      ==2666832==ERROR: AddressSanitizer: heap-use-after-free on address 0x6190001edcc8 at pc 0x7f91e6fa8acd bp 0x7f91e7297660 sp 0x7f91e7297658
      READ of size 8 at 0x6190001edcc8 thread T5
          #0 0x7f91e6fa8acc in ha_spider::field_exchange(Field*) /data/src/10.3/storage/spider/ha_spider.cc:12199
          #1 0x7f91e6fa9f94 in ha_spider::set_searched_bitmap_from_item_list() /data/src/10.3/storage/spider/ha_spider.cc:12725
          #2 0x7f91e6fab39f in ha_spider::set_select_column_mode() /data/src/10.3/storage/spider/ha_spider.cc:12770
          #3 0x7f91e6fab39f in ha_spider::set_select_column_mode() /data/src/10.3/storage/spider/ha_spider.cc:12733
          #4 0x7f91e6fc5db7 in ha_spider::rnd_init(bool) /data/src/10.3/storage/spider/ha_spider.cc:7545
          #5 0x558e9a7d0450 in handler::ha_rnd_init(bool) /data/src/10.3/sql/handler.h:3059
          #6 0x558e9a7d0450 in ha_partition::rnd_init(bool) /data/src/10.3/sql/ha_partition.cc:5031
          #7 0x558e9983af9b in handler::ha_rnd_init(bool) /data/src/10.3/sql/handler.h:3059
          #8 0x558e9983af9b in handler::ha_rnd_init_with_error(bool) /data/src/10.3/sql/handler.cc:3073
          #9 0x558e99c97c6e in init_read_record(READ_RECORD*, THD*, TABLE*, SQL_SELECT*, SORT_INFO*, int, bool, bool) /data/src/10.3/sql/records.cc:294
          #10 0x558e992e25b0 in join_init_read_record(st_join_table*) /data/src/10.3/sql/sql_select.cc:20834
          #11 0x558e9929a0cf in sub_select(JOIN*, st_join_table*, bool) /data/src/10.3/sql/sql_select.cc:19892
          #12 0x558e9932e14f in do_select /data/src/10.3/sql/sql_select.cc:19433
          #13 0x558e9932e14f in JOIN::exec_inner() /data/src/10.3/sql/sql_select.cc:4151
          #14 0x558e9932f999 in JOIN::exec() /data/src/10.3/sql/sql_select.cc:3945
          #15 0x558e994264fe in st_select_lex_unit::exec() /data/src/10.3/sql/sql_union.cc:1546
          #16 0x558e994323bf in mysql_union(THD*, LEX*, select_result*, st_select_lex_unit*, unsigned long) /data/src/10.3/sql/sql_union.cc:42
          #17 0x558e99332355 in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.3/sql/sql_select.cc:362
          #18 0x558e991c302f in execute_sqlcom_select /data/src/10.3/sql/sql_parse.cc:6339
          #19 0x558e991e8198 in mysql_execute_command(THD*) /data/src/10.3/sql/sql_parse.cc:3870
          #20 0x558e991f0637 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.3/sql/sql_parse.cc:7870
          #21 0x558e991f5179 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.3/sql/sql_parse.cc:1852
          #22 0x558e991faf1d in do_command(THD*) /data/src/10.3/sql/sql_parse.cc:1398
          #23 0x558e99518c96 in do_handle_one_connection(CONNECT*) /data/src/10.3/sql/sql_connect.cc:1403
          #24 0x558e995194fa in handle_one_connection /data/src/10.3/sql/sql_connect.cc:1308
          #25 0x558e9a75ee14 in pfs_spawn_thread /data/src/10.3/storage/perfschema/pfs.cc:1869
          #26 0x7f91f1cb6ea6 in start_thread nptl/pthread_create.c:477
          #27 0x7f91f1be6dee in __clone (/lib/x86_64-linux-gnu/libc.so.6+0xfddee)
       
      0x6190001edcc8 is located 72 bytes inside of 992-byte region [0x6190001edc80,0x6190001ee060)
      freed by thread T5 here:
          #0 0x7f91f2558b6f in __interceptor_free ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:123
          #1 0x558e9a81cb7d in free_root /data/src/10.3/mysys/my_alloc.c:430
          #2 0x558e992bf4cb in free_tmp_table(THD*, TABLE*) /data/src/10.3/sql/sql_select.cc:19199
          #3 0x558e9932a864 in JOIN::cleanup(bool) /data/src/10.3/sql/sql_select.cc:13201
          #4 0x558e9932b467 in JOIN::join_free() /data/src/10.3/sql/sql_select.cc:13091
          #5 0x558e9932e01c in do_select /data/src/10.3/sql/sql_select.cc:19480
          #6 0x558e9932e01c in JOIN::exec_inner() /data/src/10.3/sql/sql_select.cc:4151
          #7 0x558e9932f999 in JOIN::exec() /data/src/10.3/sql/sql_select.cc:3945
          #8 0x558e994264fe in st_select_lex_unit::exec() /data/src/10.3/sql/sql_union.cc:1546
          #9 0x558e994323bf in mysql_union(THD*, LEX*, select_result*, st_select_lex_unit*, unsigned long) /data/src/10.3/sql/sql_union.cc:42
          #10 0x558e99332355 in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.3/sql/sql_select.cc:362
          #11 0x558e991c302f in execute_sqlcom_select /data/src/10.3/sql/sql_parse.cc:6339
          #12 0x558e991e8198 in mysql_execute_command(THD*) /data/src/10.3/sql/sql_parse.cc:3870
          #13 0x558e991f0637 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.3/sql/sql_parse.cc:7870
          #14 0x558e991f5179 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.3/sql/sql_parse.cc:1852
          #15 0x558e991faf1d in do_command(THD*) /data/src/10.3/sql/sql_parse.cc:1398
          #16 0x558e99518c96 in do_handle_one_connection(CONNECT*) /data/src/10.3/sql/sql_connect.cc:1403
          #17 0x558e995194fa in handle_one_connection /data/src/10.3/sql/sql_connect.cc:1308
          #18 0x558e9a75ee14 in pfs_spawn_thread /data/src/10.3/storage/perfschema/pfs.cc:1869
          #19 0x7f91f1cb6ea6 in start_thread nptl/pthread_create.c:477
       
      previously allocated by thread T5 here:
          #0 0x7f91f2558e8f in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
          #1 0x558e9a82fe62 in my_malloc /data/src/10.3/mysys/my_malloc.c:101
          #2 0x558e9a81c39b in alloc_root /data/src/10.3/mysys/my_alloc.c:251
          #3 0x558e9a81d155 in memdup_root /data/src/10.3/mysys/my_alloc.c:494
          #4 0x558e997bb30d in Field::make_new_field(st_mem_root*, TABLE*, bool) /data/src/10.3/sql/field.cc:2347
          #5 0x558e992b0efe in create_tmp_field_from_field(THD*, Field*, st_mysql_const_lex_string*, TABLE*, Item_field*) /data/src/10.3/sql/sql_select.cc:17140
          #6 0x558e992b2254 in create_tmp_field(THD*, TABLE*, Item*, Item::Type, Item***, Field**, Field**, bool, bool, bool, bool) /data/src/10.3/sql/sql_select.cc:17427
          #7 0x558e992c2ae3 in create_tmp_table(THD*, TMP_TABLE_PARAM*, List<Item>&, st_order*, bool, bool, unsigned long long, unsigned long long, st_mysql_const_lex_string const*, bool, bool) /data/src/10.3/sql/sql_select.cc:17885
          #8 0x558e992f3e64 in JOIN::create_postjoin_aggr_table(st_join_table*, List<Item>*, st_order*, bool, bool, bool) /data/src/10.3/sql/sql_select.cc:3458
          #9 0x558e992f6b58 in JOIN::make_aggr_tables_info() /data/src/10.3/sql/sql_select.cc:3058
          #10 0x558e993189d1 in JOIN::optimize_stage2() /data/src/10.3/sql/sql_select.cc:2697
          #11 0x558e9932283a in JOIN::optimize_inner() /data/src/10.3/sql/sql_select.cc:2003
          #12 0x558e993297a1 in JOIN::optimize() /data/src/10.3/sql/sql_select.cc:1519
          #13 0x558e99424eb1 in st_select_lex_unit::optimize() /data/src/10.3/sql/sql_union.cc:1434
          #14 0x558e994256f4 in st_select_lex_unit::exec() /data/src/10.3/sql/sql_union.cc:1468
          #15 0x558e994323bf in mysql_union(THD*, LEX*, select_result*, st_select_lex_unit*, unsigned long) /data/src/10.3/sql/sql_union.cc:42
          #16 0x558e99332355 in handle_select(THD*, LEX*, select_result*, unsigned long) /data/src/10.3/sql/sql_select.cc:362
          #17 0x558e991c302f in execute_sqlcom_select /data/src/10.3/sql/sql_parse.cc:6339
          #18 0x558e991e8198 in mysql_execute_command(THD*) /data/src/10.3/sql/sql_parse.cc:3870
          #19 0x558e991f0637 in mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool) /data/src/10.3/sql/sql_parse.cc:7870
          #20 0x558e991f5179 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool) /data/src/10.3/sql/sql_parse.cc:1852
          #21 0x558e991faf1d in do_command(THD*) /data/src/10.3/sql/sql_parse.cc:1398
          #22 0x558e99518c96 in do_handle_one_connection(CONNECT*) /data/src/10.3/sql/sql_connect.cc:1403
          #23 0x558e995194fa in handle_one_connection /data/src/10.3/sql/sql_connect.cc:1308
          #24 0x558e9a75ee14 in pfs_spawn_thread /data/src/10.3/storage/perfschema/pfs.cc:1869
          #25 0x7f91f1cb6ea6 in start_thread nptl/pthread_create.c:477
       
      Thread T5 created by T0 here:
          #0 0x7f91f25042a2 in __interceptor_pthread_create ../../../../src/libsanitizer/asan/asan_interceptors.cpp:214
          #1 0x558e9a76346a in spawn_thread_v1 /data/src/10.3/storage/perfschema/pfs.cc:1919
          #2 0x558e98f87f9b in inline_mysql_thread_create /data/src/10.3/include/mysql/psi/mysql_thread.h:1275
          #3 0x558e98f87f9b in create_thread_to_handle_connection(CONNECT*) /data/src/10.3/sql/mysqld.cc:6668
          #4 0x558e98f982ad in create_new_thread /data/src/10.3/sql/mysqld.cc:6738
          #5 0x558e98f982ad in handle_connections_sockets() /data/src/10.3/sql/mysqld.cc:6996
          #6 0x558e98f9a255 in mysqld_main(int, char**) /data/src/10.3/sql/mysqld.cc:6290
          #7 0x7f91f1b0fd09 in __libc_start_main ../csu/libc-start.c:308
       
      SUMMARY: AddressSanitizer: heap-use-after-free /data/src/10.3/storage/spider/ha_spider.cc:12199 in ha_spider::field_exchange(Field*)
      Shadow bytes around the buggy address:
        0x0c3280035b40: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
        0x0c3280035b50: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
        0x0c3280035b60: fd fd fd fa fa fa fa fa fa fa fa fa fa fa fa fa
        0x0c3280035b70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
        0x0c3280035b80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
      =>0x0c3280035b90: fd fd fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd
        0x0c3280035ba0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
        0x0c3280035bb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
        0x0c3280035bc0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
        0x0c3280035bd0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
        0x0c3280035be0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
      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
      

      Attachments

        Activity

          I ran into this one as well.

          --source include/have_innodb.inc
          --let $SOCKET= `SELECT @@global.socket`
          INSTALL PLUGIN Spider SONAME 'ha_spider.so';
          CREATE USER spider@localhost IDENTIFIED BY 'pwd';
          GRANT ALL ON test.* TO spider@localhost;
          eval CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$SOCKET",DATABASE 'test',USER 'spider',PASSWORD 'pwd');
          CREATE TABLE t (c INT KEY) ENGINE=InnoDB;
          INSERT INTO t VALUES (0),(1),(2);
          CREATE TABLE t2 (c INT KEY) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "t"';
          SELECT * FROM t2 JOIN (SELECT 1 UNION SELECT 1) a ON 1;
          

          Leads to:

          11.0.2 368dd22a816f3b437bccd0b9ff28b9de9b1abf0a (Debug, UBASAN)

          ==1446187==ERROR: AddressSanitizer: heap-use-after-free on address 0x6190002d46b8 at pc 0x14c4f0487868 bp 0x14c4f130d590 sp 0x14c4f130d580
          READ of size 8 at 0x6190002d46b8 thread T32
              #0 0x14c4f0487867 in ha_spider::field_exchange(Field*) /test/11.0_dbg_san/storage/spider/ha_spider.cc:9254
              #1 0x14c4f048bf7e in ha_spider::set_searched_bitmap_from_item_list() /test/11.0_dbg_san/storage/spider/ha_spider.cc:9561
              #2 0x14c4f04923e8 in ha_spider::set_select_column_mode() /test/11.0_dbg_san/storage/spider/ha_spider.cc:9591
              #3 0x14c4f05421db in ha_spider::index_init(unsigned int, bool) /test/11.0_dbg_san/storage/spider/ha_spider.cc:1217
              #4 0x5625c4269406 in handler::ha_index_init(unsigned int, bool) /test/11.0_dbg_san/sql/handler.h:3408
              #5 0x5625c4269406 in init_read_record_idx(READ_RECORD*, THD*, TABLE*, bool, unsigned int, bool) /test/11.0_dbg_san/sql/records.cc:85
              #6 0x5625c4cc874c in join_init_read_record(st_join_table*) /test/11.0_dbg_san/sql/sql_select.cc:24256
              #7 0x5625c5535350 in JOIN_TAB_SCAN::open() /test/11.0_dbg_san/sql/sql_join_cache.cc:3459
              #8 0x5625c555b8c4 in JOIN_CACHE::join_matching_records(bool) /test/11.0_dbg_san/sql/sql_join_cache.cc:2333
              #9 0x5625c5557882 in JOIN_CACHE::join_records(bool) /test/11.0_dbg_san/sql/sql_join_cache.cc:2158
              #10 0x5625c4bfa8e4 in sub_select_cache(JOIN*, st_join_table*, bool) /test/11.0_dbg_san/sql/sql_select.cc:23011
              #11 0x5625c4bf8352 in sub_select(JOIN*, st_join_table*, bool) /test/11.0_dbg_san/sql/sql_select.cc:23186
              #12 0x5625c4da6277 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22782
              #13 0x5625c4da6277 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
              #14 0x5625c4da7916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
              #15 0x5625c4d960c1 in 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*) /test/11.0_dbg_san/sql/sql_select.cc:5158
              #16 0x5625c4d9a51c in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616
              #17 0x5625c490ca01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279
              #18 0x5625c496def5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949
              #19 0x5625c499d973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014
              #20 0x5625c49ad707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894
              #21 0x5625c49bb542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407
              #22 0x5625c53908b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416
              #23 0x5625c5391dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318
              #24 0x14c4fce94b42 in start_thread nptl/pthread_create.c:442
              #25 0x14c4fcf269ff  (/lib/x86_64-linux-gnu/libc.so.6+0x1269ff)
           
          0x6190002d46b8 is located 56 bytes inside of 1040-byte region [0x6190002d4680,0x6190002d4a90)
          freed by thread T32 here:
              #0 0x5625c4021fe7 in __interceptor_free (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7963fe7)
              #1 0x5625c8739a61 in my_free /test/11.0_dbg_san/mysys/my_malloc.c:213
              #2 0x5625c8718091 in root_free /test/11.0_dbg_san/mysys/my_alloc.c:83
              #3 0x5625c871a4e5 in free_root /test/11.0_dbg_san/mysys/my_alloc.c:513
              #4 0x5625c4c6f8f6 in free_tmp_table(THD*, TABLE*) /test/11.0_dbg_san/sql/sql_select.cc:22532
              #5 0x5625c50ce0df in st_select_lex_unit::cleanup() /test/11.0_dbg_san/sql/sql_union.cc:2646
              #6 0x5625c46beef3 in mysql_derived_fill /test/11.0_dbg_san/sql/sql_derived.cc:1322
              #7 0x5625c46bbccf in mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int) /test/11.0_dbg_san/sql/sql_derived.cc:200
              #8 0x5625c4bf59fa in st_join_table::preread_init() /test/11.0_dbg_san/sql/sql_select.cc:15863
              #9 0x5625c4bf842b in sub_select(JOIN*, st_join_table*, bool) /test/11.0_dbg_san/sql/sql_select.cc:23200
              #10 0x5625c4da6164 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22780
              #11 0x5625c4da6164 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900
              #12 0x5625c4da7916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677
              #13 0x5625c4d960c1 in 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*) /test/11.0_dbg_san/sql/sql_select.cc:5158
              #14 0x5625c4d9a51c in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616
              #15 0x5625c490ca01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279
              #16 0x5625c496def5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949
              #17 0x5625c499d973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014
              #18 0x5625c49ad707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894
              #19 0x5625c49bb542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407
              #20 0x5625c53908b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416
              #21 0x5625c5391dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318
              #22 0x14c4fce94b42 in start_thread nptl/pthread_create.c:442
           
          previously allocated by thread T32 here:
              #0 0x5625c4022337 in __interceptor_malloc (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7964337)
              #1 0x5625c8739703 in my_malloc /test/11.0_dbg_san/mysys/my_malloc.c:91
              #2 0x5625c8717f22 in root_alloc /test/11.0_dbg_san/mysys/my_alloc.c:71
              #3 0x5625c8719372 in alloc_root /test/11.0_dbg_san/mysys/my_alloc.c:337
              #4 0x5625c5842fbf in Field::operator new(unsigned long, st_mem_root*) /test/11.0_dbg_san/sql/field.h:775
              #5 0x5625c5842fbf in Type_handler_long::make_table_field_from_def(TABLE_SHARE*, st_mem_root*, st_mysql_const_lex_string const*, Record_addr const&, Bit_addr const&, Column_definition_attributes const*, unsigned int) const /test/11.0_dbg_san/sql/sql_type.cc:8139
              #6 0x5625c583bc76 in Type_handler_int_result::make_table_field(st_mem_root*, st_mysql_const_lex_string const*, Record_addr const&, Type_all_attributes const&, TABLE_SHARE*) const /test/11.0_dbg_san/sql/sql_type.cc:3574
              #7 0x5625c58b1602 in Type_handler::make_and_init_table_field(st_mem_root*, st_mysql_const_lex_string const*, Record_addr const&, Type_all_attributes const&, TABLE*) const /test/11.0_dbg_san/sql/sql_type.cc:3559
              #8 0x5625c62537b5 in Item_type_holder::create_tmp_field_ex(st_mem_root*, TABLE*, Tmp_field_src*, Tmp_field_param const*) /test/11.0_dbg_san/sql/item.h:7673
              #9 0x5625c4c531de in create_tmp_field(TABLE*, Item*, Item***, Field**, Field**, bool, bool, bool, bool) /test/11.0_dbg_san/sql/sql_select.cc:20642
              #10 0x5625c4c5dbcd in Create_tmp_table::add_fields(THD*, TABLE*, TMP_TABLE_PARAM*, List<Item>&) /test/11.0_dbg_san/sql/sql_select.cc:21080
              #11 0x5625c4c80dda in create_tmp_table(THD*, TMP_TABLE_PARAM*, List<Item>&, st_order*, bool, bool, unsigned long long, unsigned long long, st_mysql_const_lex_string const*, bool, bool) /test/11.0_dbg_san/sql/sql_select.cc:21739
              #12 0x5625c509b2f6 in select_unit::create_result_table(THD*, List<Item>*, bool, unsigned long long, st_mysql_const_lex_string const*, bool, bool, bool, unsigned int) /test/11.0_dbg_san/sql/sql_union.cc:351
              #13 0x5625c50db3cc in st_select_lex_unit::prepare(TABLE_LIST*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_union.cc:1768
              #14 0x5625c46ca993 in mysql_derived_prepare /test/11.0_dbg_san/sql/sql_derived.cc:840
              #15 0x5625c46bbccf in mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int) /test/11.0_dbg_san/sql/sql_derived.cc:200
              #16 0x5625c51fa985 in TABLE_LIST::handle_derived(LEX*, unsigned int) /test/11.0_dbg_san/sql/table.cc:9620
              #17 0x5625c47c3f67 in LEX::handle_list_of_derived(TABLE_LIST*, unsigned int) /test/11.0_dbg_san/sql/sql_lex.h:4510
              #18 0x5625c47c3f67 in st_select_lex::handle_derived(LEX*, unsigned int) /test/11.0_dbg_san/sql/sql_lex.cc:4976
              #19 0x5625c4ce98a1 in JOIN::prepare(TABLE_LIST*, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*) /test/11.0_dbg_san/sql/sql_select.cc:1398
              #20 0x5625c4d98cfc in 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*) /test/11.0_dbg_san/sql/sql_select.cc:5133
              #21 0x5625c4d9a51c in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616
              #22 0x5625c490ca01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279
              #23 0x5625c496def5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949
              #24 0x5625c499d973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014
              #25 0x5625c49ad707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894
              #26 0x5625c49bb542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407
              #27 0x5625c53908b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416
              #28 0x5625c5391dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318
              #29 0x14c4fce94b42 in start_thread nptl/pthread_create.c:442
           
          Thread T32 created by T0 here:
              #0 0x5625c3fc6175 in pthread_create (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7908175)
              #1 0x5625c407c98b in create_thread_to_handle_connection(CONNECT*) /test/11.0_dbg_san/sql/mysqld.cc:6129
              #2 0x5625c4089e67 in create_new_thread(CONNECT*) /test/11.0_dbg_san/sql/mysqld.cc:6191
              #3 0x5625c408a6e7 in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /test/11.0_dbg_san/sql/mysqld.cc:6253
              #4 0x5625c408b738 in handle_connections_sockets() /test/11.0_dbg_san/sql/mysqld.cc:6377
              #5 0x5625c4092ee7 in mysqld_main(int, char**) /test/11.0_dbg_san/sql/mysqld.cc:6024
              #6 0x5625c4067eca in main /test/11.0_dbg_san/sql/main.cc:34
              #7 0x14c4fce29d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
           
          SUMMARY: AddressSanitizer: heap-use-after-free /test/11.0_dbg_san/storage/spider/ha_spider.cc:9254 in ha_spider::field_exchange(Field*)
          Shadow bytes around the buggy address:
            0x0c3280052880: 00 00 00 00 00 00 00 f7 00 f7 00 f7 f7 f7 f7 f7
            0x0c3280052890: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
            0x0c32800528a0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7
            0x0c32800528b0: f7 f7 fa fa fa fa fa fa fa fa fa fa fa fa fa fa
            0x0c32800528c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
          =>0x0c32800528d0: fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd fd fd
            0x0c32800528e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
            0x0c32800528f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
            0x0c3280052900: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
            0x0c3280052910: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
            0x0c3280052920: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
          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
          ==1446187==ABORTING
          230520 14:47:00 [ERROR] mysqld got signal 6 ;
          

          Roel Roel Van de Paar added a comment - I ran into this one as well. --source include/have_innodb.inc --let $SOCKET= `SELECT @@global.socket` INSTALL PLUGIN Spider SONAME 'ha_spider.so' ; CREATE USER spider@localhost IDENTIFIED BY 'pwd' ; GRANT ALL ON test.* TO spider@localhost; eval CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$SOCKET" , DATABASE 'test' , USER 'spider' , PASSWORD 'pwd' ); CREATE TABLE t (c INT KEY ) ENGINE=InnoDB; INSERT INTO t VALUES (0),(1),(2); CREATE TABLE t2 (c INT KEY ) ENGINE=Spider COMMENT= 'WRAPPER "mysql",srv "srv",TABLE "t"' ; SELECT * FROM t2 JOIN ( SELECT 1 UNION SELECT 1) a ON 1; Leads to: 11.0.2 368dd22a816f3b437bccd0b9ff28b9de9b1abf0a (Debug, UBASAN) ==1446187==ERROR: AddressSanitizer: heap-use-after-free on address 0x6190002d46b8 at pc 0x14c4f0487868 bp 0x14c4f130d590 sp 0x14c4f130d580 READ of size 8 at 0x6190002d46b8 thread T32 #0 0x14c4f0487867 in ha_spider::field_exchange(Field*) /test/11.0_dbg_san/storage/spider/ha_spider.cc:9254 #1 0x14c4f048bf7e in ha_spider::set_searched_bitmap_from_item_list() /test/11.0_dbg_san/storage/spider/ha_spider.cc:9561 #2 0x14c4f04923e8 in ha_spider::set_select_column_mode() /test/11.0_dbg_san/storage/spider/ha_spider.cc:9591 #3 0x14c4f05421db in ha_spider::index_init(unsigned int, bool) /test/11.0_dbg_san/storage/spider/ha_spider.cc:1217 #4 0x5625c4269406 in handler::ha_index_init(unsigned int, bool) /test/11.0_dbg_san/sql/handler.h:3408 #5 0x5625c4269406 in init_read_record_idx(READ_RECORD*, THD*, TABLE*, bool, unsigned int, bool) /test/11.0_dbg_san/sql/records.cc:85 #6 0x5625c4cc874c in join_init_read_record(st_join_table*) /test/11.0_dbg_san/sql/sql_select.cc:24256 #7 0x5625c5535350 in JOIN_TAB_SCAN::open() /test/11.0_dbg_san/sql/sql_join_cache.cc:3459 #8 0x5625c555b8c4 in JOIN_CACHE::join_matching_records(bool) /test/11.0_dbg_san/sql/sql_join_cache.cc:2333 #9 0x5625c5557882 in JOIN_CACHE::join_records(bool) /test/11.0_dbg_san/sql/sql_join_cache.cc:2158 #10 0x5625c4bfa8e4 in sub_select_cache(JOIN*, st_join_table*, bool) /test/11.0_dbg_san/sql/sql_select.cc:23011 #11 0x5625c4bf8352 in sub_select(JOIN*, st_join_table*, bool) /test/11.0_dbg_san/sql/sql_select.cc:23186 #12 0x5625c4da6277 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22782 #13 0x5625c4da6277 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900 #14 0x5625c4da7916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677 #15 0x5625c4d960c1 in 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*) /test/11.0_dbg_san/sql/sql_select.cc:5158 #16 0x5625c4d9a51c in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616 #17 0x5625c490ca01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279 #18 0x5625c496def5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949 #19 0x5625c499d973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014 #20 0x5625c49ad707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894 #21 0x5625c49bb542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407 #22 0x5625c53908b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416 #23 0x5625c5391dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318 #24 0x14c4fce94b42 in start_thread nptl/pthread_create.c:442 #25 0x14c4fcf269ff (/lib/x86_64-linux-gnu/libc.so.6+0x1269ff)   0x6190002d46b8 is located 56 bytes inside of 1040-byte region [0x6190002d4680,0x6190002d4a90) freed by thread T32 here: #0 0x5625c4021fe7 in __interceptor_free (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7963fe7) #1 0x5625c8739a61 in my_free /test/11.0_dbg_san/mysys/my_malloc.c:213 #2 0x5625c8718091 in root_free /test/11.0_dbg_san/mysys/my_alloc.c:83 #3 0x5625c871a4e5 in free_root /test/11.0_dbg_san/mysys/my_alloc.c:513 #4 0x5625c4c6f8f6 in free_tmp_table(THD*, TABLE*) /test/11.0_dbg_san/sql/sql_select.cc:22532 #5 0x5625c50ce0df in st_select_lex_unit::cleanup() /test/11.0_dbg_san/sql/sql_union.cc:2646 #6 0x5625c46beef3 in mysql_derived_fill /test/11.0_dbg_san/sql/sql_derived.cc:1322 #7 0x5625c46bbccf in mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int) /test/11.0_dbg_san/sql/sql_derived.cc:200 #8 0x5625c4bf59fa in st_join_table::preread_init() /test/11.0_dbg_san/sql/sql_select.cc:15863 #9 0x5625c4bf842b in sub_select(JOIN*, st_join_table*, bool) /test/11.0_dbg_san/sql/sql_select.cc:23200 #10 0x5625c4da6164 in do_select /test/11.0_dbg_san/sql/sql_select.cc:22780 #11 0x5625c4da6164 in JOIN::exec_inner() /test/11.0_dbg_san/sql/sql_select.cc:4900 #12 0x5625c4da7916 in JOIN::exec() /test/11.0_dbg_san/sql/sql_select.cc:4677 #13 0x5625c4d960c1 in 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*) /test/11.0_dbg_san/sql/sql_select.cc:5158 #14 0x5625c4d9a51c in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616 #15 0x5625c490ca01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279 #16 0x5625c496def5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949 #17 0x5625c499d973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014 #18 0x5625c49ad707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894 #19 0x5625c49bb542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407 #20 0x5625c53908b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416 #21 0x5625c5391dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318 #22 0x14c4fce94b42 in start_thread nptl/pthread_create.c:442   previously allocated by thread T32 here: #0 0x5625c4022337 in __interceptor_malloc (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7964337) #1 0x5625c8739703 in my_malloc /test/11.0_dbg_san/mysys/my_malloc.c:91 #2 0x5625c8717f22 in root_alloc /test/11.0_dbg_san/mysys/my_alloc.c:71 #3 0x5625c8719372 in alloc_root /test/11.0_dbg_san/mysys/my_alloc.c:337 #4 0x5625c5842fbf in Field::operator new(unsigned long, st_mem_root*) /test/11.0_dbg_san/sql/field.h:775 #5 0x5625c5842fbf in Type_handler_long::make_table_field_from_def(TABLE_SHARE*, st_mem_root*, st_mysql_const_lex_string const*, Record_addr const&, Bit_addr const&, Column_definition_attributes const*, unsigned int) const /test/11.0_dbg_san/sql/sql_type.cc:8139 #6 0x5625c583bc76 in Type_handler_int_result::make_table_field(st_mem_root*, st_mysql_const_lex_string const*, Record_addr const&, Type_all_attributes const&, TABLE_SHARE*) const /test/11.0_dbg_san/sql/sql_type.cc:3574 #7 0x5625c58b1602 in Type_handler::make_and_init_table_field(st_mem_root*, st_mysql_const_lex_string const*, Record_addr const&, Type_all_attributes const&, TABLE*) const /test/11.0_dbg_san/sql/sql_type.cc:3559 #8 0x5625c62537b5 in Item_type_holder::create_tmp_field_ex(st_mem_root*, TABLE*, Tmp_field_src*, Tmp_field_param const*) /test/11.0_dbg_san/sql/item.h:7673 #9 0x5625c4c531de in create_tmp_field(TABLE*, Item*, Item***, Field**, Field**, bool, bool, bool, bool) /test/11.0_dbg_san/sql/sql_select.cc:20642 #10 0x5625c4c5dbcd in Create_tmp_table::add_fields(THD*, TABLE*, TMP_TABLE_PARAM*, List<Item>&) /test/11.0_dbg_san/sql/sql_select.cc:21080 #11 0x5625c4c80dda in create_tmp_table(THD*, TMP_TABLE_PARAM*, List<Item>&, st_order*, bool, bool, unsigned long long, unsigned long long, st_mysql_const_lex_string const*, bool, bool) /test/11.0_dbg_san/sql/sql_select.cc:21739 #12 0x5625c509b2f6 in select_unit::create_result_table(THD*, List<Item>*, bool, unsigned long long, st_mysql_const_lex_string const*, bool, bool, bool, unsigned int) /test/11.0_dbg_san/sql/sql_union.cc:351 #13 0x5625c50db3cc in st_select_lex_unit::prepare(TABLE_LIST*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_union.cc:1768 #14 0x5625c46ca993 in mysql_derived_prepare /test/11.0_dbg_san/sql/sql_derived.cc:840 #15 0x5625c46bbccf in mysql_handle_single_derived(LEX*, TABLE_LIST*, unsigned int) /test/11.0_dbg_san/sql/sql_derived.cc:200 #16 0x5625c51fa985 in TABLE_LIST::handle_derived(LEX*, unsigned int) /test/11.0_dbg_san/sql/table.cc:9620 #17 0x5625c47c3f67 in LEX::handle_list_of_derived(TABLE_LIST*, unsigned int) /test/11.0_dbg_san/sql/sql_lex.h:4510 #18 0x5625c47c3f67 in st_select_lex::handle_derived(LEX*, unsigned int) /test/11.0_dbg_san/sql/sql_lex.cc:4976 #19 0x5625c4ce98a1 in JOIN::prepare(TABLE_LIST*, Item*, unsigned int, st_order*, bool, st_order*, Item*, st_order*, st_select_lex*, st_select_lex_unit*) /test/11.0_dbg_san/sql/sql_select.cc:1398 #20 0x5625c4d98cfc in 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*) /test/11.0_dbg_san/sql/sql_select.cc:5133 #21 0x5625c4d9a51c in handle_select(THD*, LEX*, select_result*, unsigned long long) /test/11.0_dbg_san/sql/sql_select.cc:616 #22 0x5625c490ca01 in execute_sqlcom_select /test/11.0_dbg_san/sql/sql_parse.cc:6279 #23 0x5625c496def5 in mysql_execute_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:3949 #24 0x5625c499d973 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/11.0_dbg_san/sql/sql_parse.cc:8014 #25 0x5625c49ad707 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1894 #26 0x5625c49bb542 in do_command(THD*, bool) /test/11.0_dbg_san/sql/sql_parse.cc:1407 #27 0x5625c53908b5 in do_handle_one_connection(CONNECT*, bool) /test/11.0_dbg_san/sql/sql_connect.cc:1416 #28 0x5625c5391dd0 in handle_one_connection /test/11.0_dbg_san/sql/sql_connect.cc:1318 #29 0x14c4fce94b42 in start_thread nptl/pthread_create.c:442   Thread T32 created by T0 here: #0 0x5625c3fc6175 in pthread_create (/test/UBASAN_MD120523-mariadb-11.0.2-linux-x86_64-dbg/bin/mariadbd+0x7908175) #1 0x5625c407c98b in create_thread_to_handle_connection(CONNECT*) /test/11.0_dbg_san/sql/mysqld.cc:6129 #2 0x5625c4089e67 in create_new_thread(CONNECT*) /test/11.0_dbg_san/sql/mysqld.cc:6191 #3 0x5625c408a6e7 in handle_accepted_socket(st_mysql_socket, st_mysql_socket) /test/11.0_dbg_san/sql/mysqld.cc:6253 #4 0x5625c408b738 in handle_connections_sockets() /test/11.0_dbg_san/sql/mysqld.cc:6377 #5 0x5625c4092ee7 in mysqld_main(int, char**) /test/11.0_dbg_san/sql/mysqld.cc:6024 #6 0x5625c4067eca in main /test/11.0_dbg_san/sql/main.cc:34 #7 0x14c4fce29d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58   SUMMARY: AddressSanitizer: heap-use-after-free /test/11.0_dbg_san/storage/spider/ha_spider.cc:9254 in ha_spider::field_exchange(Field*) Shadow bytes around the buggy address: 0x0c3280052880: 00 00 00 00 00 00 00 f7 00 f7 00 f7 f7 f7 f7 f7 0x0c3280052890: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0c32800528a0: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 0x0c32800528b0: f7 f7 fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c32800528c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c32800528d0: fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd fd fd 0x0c32800528e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c32800528f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3280052900: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3280052910: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c3280052920: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 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 ==1446187==ABORTING 230520 14:47:00 [ERROR] mysqld got signal 6 ;

          Note the small difference in stacks:

          ASAN|heap-use-after-free|storage/spider/ha_spider.cc|ha_spider::field_exchange|ha_spider::set_searched_bitmap_from_item_list|ha_spider::set_select_column_mode|ha_spider::rnd_init
          ASAN|heap-use-after-free|storage/spider/ha_spider.cc|ha_spider::field_exchange|ha_spider::set_searched_bitmap_from_item_list|ha_spider::set_select_column_mode|ha_spider::index_init
          

          The first line is the original one, the second is the one in the comment just above.

          Roel Roel Van de Paar added a comment - Note the small difference in stacks: ASAN|heap-use-after-free|storage/spider/ha_spider.cc|ha_spider::field_exchange|ha_spider::set_searched_bitmap_from_item_list|ha_spider::set_select_column_mode|ha_spider::rnd_init ASAN|heap-use-after-free|storage/spider/ha_spider.cc|ha_spider::field_exchange|ha_spider::set_searched_bitmap_from_item_list|ha_spider::set_select_column_mode|ha_spider::index_init The first line is the original one, the second is the one in the comment just above.
          ycp Yuchen Pei added a comment -

          Out of curiosity, I tested on my MDEV-34639 draft patch bc792266f9b1c83182bbcfc9d8eb256cf11dffe7 and the bug still reproduces.

          ycp Yuchen Pei added a comment - Out of curiosity, I tested on my MDEV-34639 draft patch bc792266f9b1c83182bbcfc9d8eb256cf11dffe7 and the bug still reproduces.

          People

            ycp Yuchen Pei
            elenst Elena Stepanova
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