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  1. MariaDB Server
  2. MDEV-22625

SIGSEGV in intern_find_sys_var (optimized builds)

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      SOURCE in.sql  # attached to this report, 2 lines
      

      Leads to:

      10.5.3 cfe5ee90c8e4b9dfa98a41fcd299197a59261be7

      Core was generated by `/test/MD110520-mariadb-10.5.3-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11)
          at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
      [Current thread is 1 (Thread 0x1522efa56700 (LWP 1258888))]
      (gdb) bt
      #0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
      #1  0x000055e9164d1c11 in my_write_core (sig=sig@entry=11) at /test/10.5_dbg/mysys/stacktrace.c:518
      #2  0x000055e915c76f8d in handle_fatal_signal (sig=11) at /test/10.5_dbg/sql/signal_handler.cc:329
      #3  <signal handler called>
      #4  0x000055e9158e8558 in intern_find_sys_var (str=str@entry=0x0, length=length@entry=0) at /test/10.5_dbg/sql/set_var.cc:702
      #5  0x000055e9159e4a2c in find_sys_var (thd=0x1522cc815088, str=0x0, length=0, throw_error=throw_error@entry=false) at /test/10.5_dbg/sql/sql_plugin.cc:2885
      #6  0x000055e9159ad72d in LEX::set_system_variable (this=this@entry=0x1522cc818fd0, var_type=SHOW_OPT_SESSION, name=name@entry=0x1522efa545a0, val=val@entry=0x1522cc874130) at /test/10.5_dbg/sql/sql_lex.cc:8297
      #7  0x000055e9159ad891 in LEX::set_variable (this=0x1522cc818fd0, name=name@entry=0x1522efa545a0, item=0x1522cc874130) at /test/10.5_dbg/sql/sql_lex.cc:8237
      #8  0x000055e915c02da0 in MYSQLparse (thd=thd@entry=0x1522cc815088) at /test/10.5_dbg/sql/sql_yacc.yy:16245
      #9  0x000055e9159e0086 in parse_sql (thd=thd@entry=0x1522cc815088, parser_state=parser_state@entry=0x1522efa553e0, creation_ctx=creation_ctx@entry=0x0, do_pfs_digest=do_pfs_digest@entry=true) at /test/10.5_dbg/sql/sql_parse.cc:10263
      #10 0x000055e9159da60a in mysql_parse (thd=thd@entry=0x1522cc815088, rawbuf=<optimized out>, length=8, parser_state=parser_state@entry=0x1522efa553e0, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:7910
      #11 0x000055e9159c6ffd in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x1522cc815088, packet=packet@entry=0x1522cc867089 "SET \320=''", packet_length=packet_length@entry=8, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_dbg/sql/sql_parse.cc:1839
      #12 0x000055e9159c58cc in do_command (thd=0x1522cc815088) at /test/10.5_dbg/sql/sql_parse.cc:1358
      #13 0x000055e915b1f99d in do_handle_one_connection (connect=<optimized out>, connect@entry=0x1522ce4433a8, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1411
      #14 0x000055e915b200b9 in handle_one_connection (arg=arg@entry=0x1522ce4433a8) at /test/10.5_dbg/sql/sql_connect.cc:1313
      #15 0x000055e915f7e10a in pfs_spawn_thread (arg=0x1522ed445888) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201
      #16 0x00001522eee7d6db in start_thread (arg=0x1522efa56700) at pthread_create.c:463
      #17 0x00001522ee27b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      Bug confirmed present in:
      MariaDB: 10.5.2 (dbg), 10.5.2 (opt), 10.5.3 (dbg), 10.5.3 (opt), 10.5.4 (dbg), 10.5.4 (opt)

      Bug confirmed not present in:
      MariaDB: 10.1.45 (dbg), 10.1.45 (opt), 10.2.32 (dbg), 10.2.32 (opt), 10.3.23 (dbg), 10.3.23 (opt), 10.4.13 (dbg), 10.4.13 (opt)
      MySQL: 5.5.62 (dbg), 5.5.62 (opt), 5.6.47 (dbg), 5.6.47 (opt), 5.7.29 (dbg), 5.7.29 (opt), 8.0.19 (dbg), 8.0.19 (opt)

      MariaDB 10.4.13 gives:

      ERROR 1300 (HY000) at line 2 in file: 'in.sql': Invalid dec8 character string: '\xD0'
      

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        1. in.sql
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        2. in2.sql
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            Assignee:
            bar Alexander Barkov
            Reporter:
            Roel Roel Van de Paar
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              Dates

              Created:
              Updated:
              Resolved: