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  1. MariaDB Server
  2. MDEV-32394

init_expr_cache_tracker: SEGV at /mariadb-11.3.0/sql/item_subselect.cc:7069

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Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Major
    • Resolution: Unresolved
    • 11.3.0, 10.4(EOL), 10.5, 10.6, 10.9(EOL), 10.10(EOL), 10.11, 11.0(EOL), 11.1(EOL), 11.2(EOL)
    • 10.5, 10.6, 10.11
    • Optimizer, Server
    • None
    • Ubuntu 20.04

    Description

      Run these queries in release build:

      CREATE TABLE t0 ( c27 TEXT , INDEX i0 ( c27 ( 28 ) ) ) ;
      INSERT INTO t0 VALUES ( 44 ) , ( -111 ) ;
      ALTER TABLE t0 ADD COLUMN c60 INT AFTER c27 ;
      INSERT INTO t0 VALUES ( -9 , 122 ) , ( -119 , -59 ) ;
      SELECT t2 . c41 AS c58 FROM ( SELECT ~ SIGN ( SUBSTRING( c60 , 1 NOT BETWEEN 72 AND 26 IS NOT NULL , EXISTS ( SELECT t1 . c16 NOT IN ( TRIM( LEADING FROM t0 . c60 ) ) = + FLOOR ( c60 ) AS c40 FROM ( SELECT CASE c27 WHEN 'W{uBaX$lwk~r;Y7)1 Aqctw~c"Xk;.u1@=>@~ce
      FslVdC<bzOg&' THEN 114 ELSE -61 END IS TRUE AS c16 FROM t0 ) AS t1 ) ) - ASCII ( c27 ) IS NOT NULL ) AS c41 FROM t0 ) AS t2 JOIN t0 ON t0 . c27 = t0 . c27 IN ( SELECT c60 AS c53 FROM t0 GROUP BY c60 , c60 , c41 WITH ROLLUP ) ;

      Will trigger Segmentation fault.
      GDB info:
      Thread 16 "mariadbd" received signal SIGSEGV, Segmentation fault.
      [Switching to Thread 0x7fffd242e300 (LWP 2659)]
      0x00000000015bd63c in Item_subselect::init_expr_cache_tracker (this=<optimized out>, thd=<optimized out>) at /home/wx/mariadb-11.3.0/sql/item_subselect.cc:7069
      7069 Explain_node *node= qw->get_node(unit->first_select()->select_number);

      #0 0x00000000015bd63c in Item_subselect::init_expr_cache_tracker (this=<optimized out>, thd=<optimized out>) at /home/wx/mariadb-11.3.0/sql/item_subselect.cc:7069
      #1 Item_exists_subselect::expr_cache_insert_transformer (this=<optimized out>, tmp_thd=<optimized out>, unused=<optimized out>) at /home/wx/mariadb-11.3.0/sql/item_subselect.cc:1803
      #2 0x000000000145a403 in Item_args::transform_args (this=0x6290000b0490, thd=0x62b00016c218, transformer=<optimized out>, arg=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:473
      #3 Item_func::transform (this=0x6290000b0418, thd=0x62b00016c218, transformer=<optimized out>, argument=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:509
      #4 0x000000000145a403 in Item_args::transform_args (this=0x6290000b07a0, thd=0x62b00016c218, transformer=<optimized out>, arg=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:473
      #5 Item_func::transform (this=0x6290000b0728, thd=0x62b00016c218, transformer=<optimized out>, argument=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:509
      #6 0x000000000145a403 in Item_args::transform_args (this=0x6290000b0868, thd=0x62b00016c218, transformer=<optimized out>, arg=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:473
      #7 Item_func::transform (this=0x6290000b07f0, thd=0x62b00016c218, transformer=<optimized out>, argument=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:509
      #8 0x000000000145a403 in Item_args::transform_args (this=0x6290000b0a68, thd=0x62b00016c218, transformer=<optimized out>, arg=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:473
      #9 Item_func::transform (this=0x6290000b09f0, thd=0x62b00016c218, transformer=<optimized out>, argument=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:509
      #10 0x000000000145a403 in Item_args::transform_args (this=0x6290000b0b20, thd=0x62b00016c218, transformer=<optimized out>, arg=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:473
      #11 Item_func::transform (this=0x6290000b0aa8, thd=0x62b00016c218, transformer=<optimized out>, argument=0x0) at /home/wx/mariadb-11.3.0/sql/item_func.cc:509
      #12 0x000000000136464d in Item_ref::transform (this=0x6290000bb8c0, thd=0x62b00016c218, transformer=&virtual Item::set_type_maybe_null(bool), arg=0x2d <error: Cannot access memory at address 0x2d>) at /home/wx/mariadb-11.3.0/sql/item.cc:8323
      #13 0x0000000000c2cca8 in JOIN::setup_subquery_caches (this=<optimized out>, this@entry=0x6290000b6f50) at /home/wx/mariadb-11.3.0/sql/sql_select.cc:4437
      #14 0x0000000000c085fe in JOIN::optimize_stage2 (this=0x6290000b6f50) at /home/wx/mariadb-11.3.0/sql/sql_select.cc:3235
      #15 0x0000000000c13911 in JOIN::optimize_inner (this=<optimized out>) at /home/wx/mariadb-11.3.0/sql/sql_select.cc:2650
      #16 0x0000000000bfc156 in JOIN::optimize (this=this@entry=0x6290000b6f50) at /home/wx/mariadb-11.3.0/sql/sql_select.cc:1944
      #17 0x0000000000be4fdf in mysql_select (thd=<optimized out>, thd@entry=0x62b00016c218, tables=<optimized out>, fields=..., conds=<optimized out>, og_num=<optimized out>, order=<optimized out>, group=0x0, having=0x0, proc_param=0x0, select_options=<optimized out>, result=0x6290000b6f20, unit=0x62b0001704a8, select_lex=0x629000091678) at /home/wx/mariadb-11.3.0/sql/sql_select.cc:5235
      #18 0x0000000000be4596 in handle_select (thd=thd@entry=0x62b00016c218, lex=<optimized out>, lex@entry=0x62b0001703c8, result=<optimized out>, result@entry=0x6290000b6f20, setup_tables_done_option=<optimized out>, setup_tables_done_option@entry=0) at /home/wx/mariadb-11.3.0/sql/sql_select.cc:628
      #19 0x0000000000b3df18 in execute_sqlcom_select (thd=0x62b00016c218, all_tables=<optimized out>) at /home/wx/mariadb-11.3.0/sql/sql_parse.cc:6013
      #20 0x0000000000b2cd51 in mysql_execute_command (thd=0x62b00016c218, is_called_from_prepared_stmt=<optimized out>) at /home/wx/mariadb-11.3.0/sql/sql_parse.cc:3912
      #21 0x0000000000b1fe79 in mysql_parse (thd=thd@entry=0x62b00016c218, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>, parser_state@entry=0x7fffd242ca80) at /home/wx/mariadb-11.3.0/sql/sql_parse.cc:7734
      #22 0x0000000000b19069 in dispatch_command (command=<optimized out>, thd=0x62b00016c218, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /home/wx/mariadb-11.3.0/sql/sql_parse.cc:1893
      #23 0x0000000000b20b71 in do_command (thd=0x62b00016c218, blocking=true) at /home/wx/mariadb-11.3.0/sql/sql_parse.cc:1406
      #24 0x0000000000f03476 in do_handle_one_connection (connect=<optimized out>, put_in_cache=<optimized out>) at /home/wx/mariadb-11.3.0/sql/sql_connect.cc:1445
      #25 0x0000000000f02eb9 in handle_one_connection (arg=arg@entry=0x60800145c2b8) at /home/wx/mariadb-11.3.0/sql/sql_connect.cc:1347
      #26 0x0000000001a00c1b in pfs_spawn_thread (arg=0x617000006618) at /home/wx/mariadb-11.3.0/storage/perfschema/pfs.cc:2201
      #27 0x00007ffff79f7609 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
      #28 0x00007ffff770f133 in clone () from /lib/x86_64-linux-gnu/libc.so.6

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              psergei Sergei Petrunia
              Xin Wen Xin Wen
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                Updated:

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