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  1. MariaDB Server
  2. MDEV-22464

Crash bug in array-related functions

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      Description

      We found a memory corruption bug that crash the debug build of mariadb.

      POC:

      CREATE TABLE v0 ( v1 INT ) ;
      INSERT INTO v0 ( v1 ) VALUES ( 60 ) ; 
      UPDATE v0 SET v1 = NULL BETWEEN ( SELECT 95 FROM v0 WHERE v1 = 95 AND v1 < -1 GROUP BY - 'x' >= v1 HAVING ( -128 = 2147483647 AND v1 = 94 ) ) AND 36 WHERE v1 = 2 ;
      

      Stack dump:

      200505  5:53:28 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed,
      something is definitely wrong and this may fail.
       
      Server version: 10.5.3-MariaDB-debug
      key_buffer_size=134217728
      read_buffer_size=131072
      max_used_connections=3
      max_threads=153
      thread_count=4
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467925 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f32b8000d78
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f32f8ea9dc0 thread_stack 0x49000
      fil/fil0fil.cc:3410(fil_ibd_discover(unsigned long, Datafile&))[0x32d4681]
      sql/multi_range_read.cc:764(Mrr_ordered_index_reader::refill_buffer(bool))[0x13c0898]
      ??:0(__restore_rt)[0x7f331352b890]
      sql/sql_list.h:696(Ack_receiver::~Ack_receiver())[0x147a8e0]
      sql/sql_bitmap.h:78(TABLE::prune_range_rowid_filters())[0x1570027]
      sql/field.h:3573(Field_time_with_dec::Field_time_with_dec(unsigned char*, unsigned char*, unsigned char, Field::utype, st_mysql_const_lex_string const*, unsigned int))[0x14fa4b4]
      psi/mysql_thread.h:738(inline_mysql_mutex_lock(st_mysql_mutex*, char const*, unsigned int))[0xaf14d0]
      sql-common/client.c:1103(cli_fetch_lengths)[0x16bb78b]
      sql/sql_yacc_ora.yy:2919(ORAparse(THD*))[0x168f4ba]
      sql/sql_bitmap.h:78(TABLE::prune_range_rowid_filters())[0x1570027]
      /usr/local/mysql/bin/mysqld(_Z12setup_fieldsP3THD20Bounds_checked_arrayIP4ItemER4ListIS2_E17enum_column_usagePS6_S9_b+0x864)[0x84aa74]
      sql/sql_lex.cc:6312(LEX::sp_variable_declarations_copy_type_finalize(THD*, int, Column_definition const&, Row_definition_list*, Item*))[0xd908a2]
      sql/slave.cc:4171(apply_event_and_update_pos_for_parallel(Log_event*, THD*, rpl_group_info*))[0xaf4a5d]
      sql/sql_alloc.h:39(show_master_info_get_fields(THD*, List<Item>*, bool, unsigned long))[0xae3e76]
      sql/item.h:3609(Item_null::Item_null(THD*, char const*, charset_info_st const*))[0xd8f934]
      handler/i_s.cc:312(__cxx_global_var_init.15)[0xa25a6b]
      sql/sys_vars.ic:627(Sys_var_charptr_fscs::Sys_var_charptr(char const*, char const, int, long, unsigned long, CMD_LINE, char const, PolyLock*, sys_var::binlog_status_enum, bool (*)(PolyLock**, THD*, set_var*), bool (*)(sys_var::binlog_status_enum, THD, enum_var_type), char const))[0xa07b70]
      sql/set_var.h:258(_GLOBAL__sub_I_sys_vars.cc)[0x9fd70e]
      sql/sys_vars.cc:5730(__cxx_global_var_init.1236)[0xa099cb]
      sql/item.h:4563(Item_empty_string::Item_empty_string(THD*, char const*, unsigned int, charset_info_st const*))[0xedb6d1]
      sql/item.h:746(show_binlog_info_get_fields(THD*, List<Item>*))[0xedaec1]
      gcalc_slicescan.cc:0(__afl_fork_wait_loop)[0x1e8dfc6]
      nptl/pthread_create.c:463(start_thread)[0x7f33135206db]
      x86_64/clone.S:97(clone)[0x7f33112c088f]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f32b8015055): UPDATE v0 SET v1 = NULL BETWEEN ( SELECT 95 FROM v0 WHERE v1 = 95 AND v1 < -1 GROUP BY - 'x' >= v1 HAVING ( -128 = 2147483647 AND v1 = 94 ) ) AND 36 WHERE v1 = 2
      Connection ID (thread ID): 7521
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off
       
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      Writing a core file...
      Working directory at /usr/local/mysql/data
      Resource Limits:
      Limit                     Soft Limit           Hard Limit           Units
      Max cpu time              unlimited            unlimited            seconds
      Max file size             unlimited            unlimited            bytes
      Max data size             unlimited            unlimited            bytes
      Max stack size            8388608              unlimited            bytes
      Max core file size        unlimited            unlimited            bytes
      Max resident set          unlimited            unlimited            bytes
      Max processes             unlimited            unlimited            processes
      Max open files            1048576              1048576              files
      Max locked memory         16777216             16777216             bytes
      Max address space         unlimited            unlimited            bytes
      Max file locks            unlimited            unlimited            locks
      Max pending signals       1030951              1030951              signals
      Max msgqueue size         819200               819200               bytes
      Max nice priority         0                    0
      Max realtime priority     0                    0
      Max realtime timeout      unlimited            unlimited            us
      Core pattern: co...
      ---
      
      

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              Assignee:
              sanja Oleksandr Byelkin
              Reporter:
              Ne0 Yongheng Chen
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                Dates

                Created:
                Updated: