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  1. MariaDB Server
  2. MDEV-22649

SIGSEGV in ha_partition::create_partitioning_metadata on ALTER

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      USE test;
      SET default_storage_engine=MyISAM;
      SET SESSION alter_algorithm=4;
      CREATE TABLE t(a INT) PARTITION BY RANGE(a) SUBPARTITION BY KEY(a) (PARTITION p0 VALUES LESS THAN (10) (SUBPARTITION s0,SUBPARTITION s1), PARTITION p1 VALUES LESS THAN (20) (SUBPARTITION s2,SUBPARTITION s3));
      ALTER TABLE t ADD COLUMN c INT;
      

      Leads to:

      10.5.4 69077dea25f6e7cab4ff8927e4429ad62af9de49

      Core was generated by `/test/MD160520-mariadb-10.5.4-linux-x86_64-opt/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 0x15319f35b700 (LWP 3223198))]
      (gdb) bt
      #0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
      #1  0x00005614731a9617 in my_write_core (sig=sig@entry=11) at /test/10.5_opt/mysys/stacktrace.c:518
      #2  0x0000561472b6c0fa in handle_fatal_signal (sig=11) at /test/10.5_opt/sql/signal_handler.cc:329
      #3  <signal handler called>
      #4  0x0000561472dc6869 in ha_partition::create_partitioning_metadata (this=0x15317c46f630, path=0x15319f35928d "./test/#sql-alter-312c43-4", old_path=0x0, action_flag=CHF_DELETE_FLAG) at /test/10.5_opt/sql/ha_partition.cc:689
      #5  0x00005614728677a3 in cleanup_table_after_inplace_alter (table=table@entry=0x15319f356730) at /test/10.5_opt/sql/sql_table.cc:9559
      #6  0x0000561472a0e5de in mysql_alter_table (thd=thd@entry=0x15317c412018, new_db=new_db@entry=0x15317c416710, new_name=new_name@entry=0x15317c416b18, create_info=create_info@entry=0x15319f359600, table_list=<optimized out>, table_list@entry=0x15317c447118, alter_info=alter_info@entry=0x15319f359530, order_num=0, order=0x0, ignore=false, if_exists=false) at /test/10.5_opt/sql/sql_table.cc:10417
      #7  0x0000561472a6a7a1 in Sql_cmd_alter_table::execute (this=<optimized out>, thd=0x15317c412018) at /test/10.5_opt/sql/sql_alter.cc:532
      #8  0x00005614729765d0 in mysql_execute_command (thd=thd@entry=0x15317c412018) at /test/10.5_opt/sql/sql_parse.cc:5912
      #9  0x000056147297d82c in mysql_parse (thd=0x15317c412018, rawbuf=<optimized out>, length=30, parser_state=0x15319f35a4b0, is_com_multi=<optimized out>, is_next_command=<optimized out>) at /test/10.5_opt/sql/sql_parse.cc:7957
      #10 0x0000561472972e75 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x15317c412018, packet=packet@entry=0x15317c43a019 "ALTER TABLE t ADD COLUMN c INT", packet_length=packet_length@entry=30, is_com_multi=is_com_multi@entry=false, is_next_command=is_next_command@entry=false) at /test/10.5_opt/sql/sql_parse.cc:1839
      #11 0x0000561472971106 in do_command (thd=0x15317c412018) at /test/10.5_opt/sql/sql_parse.cc:1358
      #12 0x0000561472a65bf1 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x15319d0329b8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1411
      #13 0x0000561472a65f54 in handle_one_connection (arg=arg@entry=0x15319d0329b8) at /test/10.5_opt/sql/sql_connect.cc:1313
      #14 0x0000561472dd143a in pfs_spawn_thread (arg=0x15319d04b018) at /test/10.5_opt/storage/perfschema/pfs.cc:2201
      #15 0x000015319e7826db in start_thread (arg=0x15319f35b700) at pthread_create.c:463
      #16 0x000015319db8088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      Bug confirmed present in:
      MariaDB: 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), 10.5.2 (dbg), 10.5.2 (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)

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            Assignee:
            monty Michael Widenius
            Reporter:
            Roel Roel Van de Paar
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              Created:
              Updated:
              Resolved: