Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-29087

Assertion `length <= max_data_length()' failed in Field_blob::store or Field_blob::store_to_mem

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ENGINE=InnoDB;
      INSERT INTO t VALUES (1),(30);
      SELECT GROUP_CONCAT(c ORDER BY HEX(c) SEPARATOR'') FROM t;
      

      Leads to:

      10.10.0 88b22356e623fd63aa87273a895521a6e6667bc7 (Debug)

      mysqld: /test/10.10_dbg/sql/field.cc:8654: virtual int Field_blob::store(const char*, size_t, CHARSET_INFO*): Assertion `length <= max_data_length()' failed.
      

      10.10.0 88b22356e623fd63aa87273a895521a6e6667bc7 (Debug)

      Core was generated by `/test/MD120722-mariadb-10.10.0-linux-x86_64-dbg/bin/mysqld --no-defaults --core'.
      Program terminated with signal SIGABRT, Aborted.
      #0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
      [Current thread is 1 (Thread 0x14ba509ca700 (LWP 2404530))]
      (gdb) bt
      #0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
      #1  0x000014ba69341859 in __GI_abort () at abort.c:79
      #2  0x000014ba69341729 in __assert_fail_base (fmt=0x14ba694d7588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x564f43281845 "length <= max_data_length()", file=0x564f432813cb "/test/10.10_dbg/sql/field.cc", line=8654, function=<optimized out>) at assert.c:92
      #3  0x000014ba69352fd6 in __GI___assert_fail (assertion=assertion@entry=0x564f43281845 "length <= max_data_length()", file=file@entry=0x564f432813cb "/test/10.10_dbg/sql/field.cc", line=line@entry=8654, function=function@entry=0x564f43285610 "virtual int Field_blob::store(const char*, size_t, CHARSET_INFO*)") at assert.c:101
      #4  0x0000564f427e2012 in Field_blob::store (this=0x14ba1c07c070, from=0x14ba1c0c1438 "6162636465666768696A6162636465666768696A6162636465666768696A6162636465666768696A6162636465666768696A2C6162636465666768696A6162636465666768696A6162636465666768696A6162636465666768696A616263646566676869"..., length=66640, cs=0x564f439d3860 <my_charset_utf8mb3_general_ci>) at /test/10.10_dbg/sql/field.cc:8654
      #5  0x0000564f4282851b in Item::save_str_in_field (this=0x14ba1c014400, field=0x14ba1c07c070, no_conversions=<optimized out>) at /test/10.10_dbg/sql/sql_string.h:278
      #6  0x0000564f427079b8 in Type_handler_string_result::Item_save_in_field (this=<optimized out>, item=<optimized out>, field=<optimized out>, no_conversions=<optimized out>) at /test/10.10_dbg/sql/sql_type.cc:4338
      #7  0x0000564f4280edfd in Item::save_in_field (this=0x14ba1c014400, field=0x14ba1c07c070, no_conversions=<optimized out>) at /test/10.10_dbg/sql/item.cc:6852
      #8  0x0000564f4240f30c in Item_result_field::save_in_result_field (this=<optimized out>, no_conversions=<optimized out>) at /test/10.10_dbg/sql/item.h:3451
      #9  0x0000564f42582e78 in copy_funcs (func_ptr=0x14ba1c07e4d0, thd=0x14ba1c000db8) at /test/10.10_dbg/sql/sql_select.cc:26492
      #10 0x0000564f42923f8d in Item_func_group_concat::add (this=this@entry=0x14ba1c014570, exclude_nulls=true) at /test/10.10_dbg/sql/item_sum.cc:4163
      #11 0x0000564f426e55e2 in Item_func_group_concat::add (this=0x14ba1c014570) at /test/10.10_dbg/sql/item_sum.h:2043
      #12 0x0000564f42924f87 in Aggregator_simple::add (this=<optimized out>) at /test/10.10_dbg/sql/item_sum.h:720
      #13 0x0000564f4254f9b5 in Item_sum::aggregator_add (this=<optimized out>) at /test/10.10_dbg/sql/item_sum.h:564
      #14 update_sum_func (func_ptr=0x14ba1c0161e0) at /test/10.10_dbg/sql/sql_select.cc:26462
      #15 0x0000564f4258a5b7 in end_send_group (join=0x14ba1c015aa8, join_tab=<optimized out>, end_of_records=<optimized out>) at /test/10.10_dbg/sql/sql_select.cc:22743
      #16 0x0000564f425547d9 in evaluate_join_record (join=join@entry=0x14ba1c015aa8, join_tab=join_tab@entry=0x14ba1c016e48, error=error@entry=0) at /test/10.10_dbg/sql/sql_select.cc:21508
      #17 0x0000564f4256a544 in sub_select (join=0x14ba1c015aa8, join_tab=0x14ba1c016e48, end_of_records=false) at /test/10.10_dbg/sql/sql_select.cc:21317
      #18 0x0000564f4259dd35 in do_select (procedure=<optimized out>, join=0x14ba1c015aa8) at /test/10.10_dbg/sql/sql_select.cc:20823
      #19 JOIN::exec_inner (this=this@entry=0x14ba1c015aa8) at /test/10.10_dbg/sql/sql_select.cc:4787
      #20 0x0000564f4259e2ce in JOIN::exec (this=this@entry=0x14ba1c015aa8) at /test/10.10_dbg/sql/sql_select.cc:4565
      #21 0x0000564f4259c052 in mysql_select (thd=thd@entry=0x14ba1c000db8, tables=0x14ba1c014ab8, fields=@0x14ba1c013f90: {<base_list> = {<Sql_alloc> = {<No data fields>}, first = 0x14ba1c0149e8, last = 0x14ba1c0149e8, elements = 1}, <No data fields>}, conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x14ba1c015a80, unit=0x14ba1c004fd8, select_lex=0x14ba1c013cf0) at /test/10.10_dbg/sql/sql_select.cc:5045
      #22 0x0000564f4259c848 in handle_select (thd=thd@entry=0x14ba1c000db8, lex=lex@entry=0x14ba1c004f00, result=result@entry=0x14ba1c015a80, setup_tables_done_option=setup_tables_done_option@entry=0) at /test/10.10_dbg/sql/sql_select.cc:579
      #23 0x0000564f42508188 in execute_sqlcom_select (thd=thd@entry=0x14ba1c000db8, all_tables=0x14ba1c014ab8) at /test/10.10_dbg/sql/sql_parse.cc:6260
      #24 0x0000564f4251449a in mysql_execute_command (thd=thd@entry=0x14ba1c000db8, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/10.10_dbg/sql/sql_parse.cc:3944
      #25 0x0000564f42502464 in mysql_parse (thd=thd@entry=0x14ba1c000db8, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x14ba509c9470) at /test/10.10_dbg/sql/sql_parse.cc:8036
      #26 0x0000564f4250fa4c in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14ba1c000db8, packet=packet@entry=0x14ba1c01c769 "", packet_length=packet_length@entry=57, blocking=blocking@entry=true) at /test/10.10_dbg/sql/sql_class.h:1364
      #27 0x0000564f42512156 in do_command (thd=0x14ba1c000db8, blocking=blocking@entry=true) at /test/10.10_dbg/sql/sql_parse.cc:1407
      #28 0x0000564f426720d0 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x564f44c944d8, put_in_cache=put_in_cache@entry=true) at /test/10.10_dbg/sql/sql_connect.cc:1418
      #29 0x0000564f426725d9 in handle_one_connection (arg=0x564f44c944d8) at /test/10.10_dbg/sql/sql_connect.cc:1312
      #30 0x000014ba69852609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #31 0x000014ba6943e133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      Bug confirmed present in:
      MariaDB: 10.3.36 (dbg), 10.4.26 (dbg), 10.5.17 (dbg), 10.6.9 (dbg), 10.7.5 (dbg), 10.8.4 (dbg), 10.9.2 (dbg), 10.10.0 (dbg)
      MySQL: 5.6.51 (dbg), 5.7.38 (dbg)

      Bug (or feature/syntax) confirmed not present in:
      MariaDB: 10.3.36 (opt), 10.4.26 (opt), 10.5.17 (opt), 10.6.9 (opt), 10.7.5 (opt), 10.8.4 (opt), 10.9.2 (opt), 10.10.0 (opt)
      MySQL: 5.5.62 (dbg), 5.5.62 (opt), 5.6.51 (opt), 5.7.38 (opt), 8.0.29 (dbg), 8.0.29 (opt)

      A variety of similar stacks across all versions affected:

      length <= max_data_length()|SIGABRT|Field_blob::store_to_mem|Field_blob::store|Item::save_in_field_inner|Item::save_in_field
      length <= max_data_length()|SIGABRT|Field_blob::store_to_mem|Field_blob::store|Item::save_in_field|Item_result_field::save_in_result_field
      length <= max_data_length()|SIGABRT|Field_blob::store|Item::save_str_in_field|Type_handler_string_result::Item_save_in_field|Item::save_in_field
      

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            bar Alexander Barkov
            Roel Roel Van de Paar
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