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  1. MariaDB Server
  2. MDEV-26456

SIGSEGV in flush_tables_with_read_lock on FLUSH TABLE

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      Description

      The testcases in bug MDEV-25906 now pass after the patch. However,

      SET GLOBAL log_bin_trust_function_creators=ON;
      CREATE FUNCTION f() RETURNS INT RETURN (SELECT 1 FROM t);
      CREATE VIEW v AS SELECT f();
      FLUSH TABLE v WITH READ LOCK;
      

      Leads to:

      10.7.0 52505bf20de0ce77a5c0b0a74af021051987bb0d (Debug)

      Core was generated by `/test/MD160821-mariadb-10.7.0-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  0x000055b31847b58d in flush_tables_with_read_lock (thd=thd@entry=
          0x150a94000db8, all_tables=<optimized out>)
          at /test/10.7_dbg/sql/sql_reload.cc:610
      [Current thread is 1 (Thread 0x150ad8504700 (LWP 3707074))]
      (gdb) bt
      #0  0x000055b31847b58d in flush_tables_with_read_lock (thd=thd@entry=0x150a94000db8, all_tables=<optimized out>) at /test/10.7_dbg/sql/sql_reload.cc:610
      #1  0x000055b3182d5606 in mysql_execute_command (thd=thd@entry=0x150a94000db8, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/10.7_dbg/sql/sql_parse.cc:5406
      #2  0x000055b3182bdac3 in mysql_parse (thd=thd@entry=0x150a94000db8, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x150ad8503400) at /test/10.7_dbg/sql/sql_parse.cc:8030
      #3  0x000055b3182cc6c8 in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x150a94000db8, packet=packet@entry=0x150a9400b739 "FLUSH TABLE v WITH READ LOCK", packet_length=packet_length@entry=28, blocking=blocking@entry=true) at /test/10.7_dbg/sql/sql_class.h:1357
      #4  0x000055b3182cfae9 in do_command (thd=0x150a94000db8, blocking=blocking@entry=true) at /test/10.7_dbg/sql/sql_parse.cc:1404
      #5  0x000055b318445dd6 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x55b31b9243f8, put_in_cache=put_in_cache@entry=true) at /test/10.7_dbg/sql/sql_connect.cc:1418
      #6  0x000055b3184463db in handle_one_connection (arg=arg@entry=0x55b31b9243f8) at /test/10.7_dbg/sql/sql_connect.cc:1312
      #7  0x000055b3188aece4 in pfs_spawn_thread (arg=0x55b31b84d048) at /test/10.7_dbg/storage/perfschema/pfs.cc:2201
      #8  0x0000150adc5d1609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #9  0x0000150adc1bf293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      10.7.0 52505bf20de0ce77a5c0b0a74af021051987bb0d (Optimized)

      Core was generated by `/test/MD160821-mariadb-10.7.0-linux-x86_64-opt/bin/mysqld --no-defaults --core-'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  0x0000556609ebbe9b in flush_tables_with_read_lock (thd=thd@entry=
          0x149c84000c58, all_tables=<optimized out>)
          at /test/10.7_opt/sql/sql_reload.cc:610
      [Current thread is 1 (Thread 0x149cd0483700 (LWP 3745301))]
      (gdb) bt
      #0  0x0000556609ebbe9b in flush_tables_with_read_lock (thd=thd@entry=0x149c84000c58, all_tables=<optimized out>) at /test/10.7_opt/sql/sql_reload.cc:610
      #1  0x0000556609d87418 in mysql_execute_command (thd=0x149c84000c58, is_called_from_prepared_stmt=<optimized out>) at /test/10.7_opt/sql/sql_parse.cc:5406
      #2  0x0000556609d74336 in mysql_parse (thd=0x149c84000c58, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /test/10.7_opt/sql/sql_parse.cc:8030
      #3  0x0000556609d80225 in dispatch_command (command=COM_QUERY, thd=0x149c84000c58, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /test/10.7_opt/sql/sql_class.h:1357
      #4  0x0000556609d82147 in do_command (thd=0x149c84000c58, blocking=blocking@entry=true) at /test/10.7_opt/sql/sql_parse.cc:1404
      #5  0x0000556609e9d967 in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at /test/10.7_opt/sql/sql_connect.cc:1418
      #6  0x0000556609e9dcad in handle_one_connection (arg=arg@entry=0x55660d3d6dd8) at /test/10.7_opt/sql/sql_connect.cc:1312
      #7  0x000055660a1f0648 in pfs_spawn_thread (arg=0x55660d002c88) at /test/10.7_opt/storage/perfschema/pfs.cc:2201
      #8  0x0000149cd1dbc609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #9  0x0000149cd19aa293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      Bug confirmed present in:
      MariaDB: 10.6.5 (dbg), 10.6.5 (opt), 10.7.0 (dbg), 10.7.0 (opt)

      Bug (or feature/syntax) confirmed not present in:
      MariaDB: 10.2.41 (dbg), 10.2.41 (opt), 10.3.32 (dbg), 10.3.32 (opt), 10.4.22 (dbg), 10.4.22 (opt), 10.5.13 (dbg), 10.5.13 (opt)
      MySQL: 5.5.62 (dbg), 5.5.62 (opt), 5.6.51 (dbg), 5.6.51 (opt), 5.7.35 (dbg), 5.7.35 (opt), 8.0.26 (dbg), 8.0.26 (opt)

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              Assignee:
              sanja Oleksandr Byelkin
              Reporter:
              Roel Roel Van de Paar
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                Dates

                Created:
                Updated:

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