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  1. MariaDB Server
  2. MDEV-27240

SIGSEGV in ha_spider::store_lock on LOCK TABLE

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      Description

      Note the different stacks across versions.

      INSTALL PLUGIN spider SONAME 'ha_spider.so';
      CREATE TABLE t2 (a INT KEY) ENGINE=SPIDER;
      SELECT a.z FROM t2 AS a,t2 b WHERE a.z=b.z;
      CREATE TABLE t (a INT);
      ALTER TABLE t2 CHANGE c c INT;
      LOCK TABLE t WRITE,t2 READ;
      

      Leads to:

      10.7.2 979b23d5bfb11bb698ea65c9468b374978737ec0 (Debug)

      Core was generated by `/test/MD121221-mariadb-10.7.2-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  0x000014c29c14becf in ha_spider::store_lock (this=0x14c2100c9de0, 
          thd=<optimized out>, to=0x14c2100b1418, lock_type=TL_READ_NO_INSERT)
          at /test/10.7_dbg/storage/spider/ha_spider.cc:1178
      1178	            if (unlikely((store_error_num =
      [Current thread is 1 (Thread 0x14c2a89a5700 (LWP 3053893))]
      (gdb) bt
      #0  0x000014c29c14becf in ha_spider::store_lock (this=0x14c2100c9de0, thd=<optimized out>, to=0x14c2100b1418, lock_type=TL_READ_NO_INSERT) at /test/10.7_dbg/storage/spider/ha_spider.cc:1178
      #1  0x0000558c6a6be05a in get_lock_data (thd=thd@entry=0x14c210000db8, table_ptr=table_ptr@entry=0x14c210014e68, count=count@entry=2, flags=flags@entry=1) at /test/10.7_dbg/sql/lock.cc:809
      #2  0x0000558c6a6be618 in mysql_lock_tables (thd=thd@entry=0x14c210000db8, tables=tables@entry=0x14c210014e68, count=count@entry=2, flags=flags@entry=0) at /test/10.7_dbg/sql/lock.cc:298
      #3  0x0000558c6a1a66ca in lock_tables (thd=thd@entry=0x14c210000db8, tables=0x14c210013ea0, count=<optimized out>, flags=flags@entry=0) at /test/10.7_dbg/sql/sql_base.cc:5559
      #4  0x0000558c6a2357d2 in lock_tables_open_and_lock_tables (thd=thd@entry=0x14c210000db8, tables=<optimized out>) at /test/10.7_dbg/sql/sql_parse.cc:2958
      #5  0x0000558c6a241c4a in mysql_execute_command (thd=thd@entry=0x14c210000db8, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/10.7_dbg/sql/sql_parse.cc:5124
      #6  0x0000558c6a22ae0f in mysql_parse (thd=thd@entry=0x14c210000db8, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x14c2a89a4400) at /test/10.7_dbg/sql/sql_parse.cc:8028
      #7  0x0000558c6a239aab in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x14c210000db8, packet=packet@entry=0x14c21000b879 "LOCK TABLE t WRITE,t2 READ", packet_length=packet_length@entry=26, blocking=blocking@entry=true) at /test/10.7_dbg/sql/sql_class.h:1360
      #8  0x0000558c6a23ceea in do_command (thd=0x14c210000db8, blocking=blocking@entry=true) at /test/10.7_dbg/sql/sql_parse.cc:1402
      #9  0x0000558c6a3b6902 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x558c6c8f4ae8, put_in_cache=put_in_cache@entry=true) at /test/10.7_dbg/sql/sql_connect.cc:1418
      #10 0x0000558c6a3b6f07 in handle_one_connection (arg=arg@entry=0x558c6c8f4ae8) at /test/10.7_dbg/sql/sql_connect.cc:1312
      #11 0x0000558c6a83733e in pfs_spawn_thread (arg=0x558c6c8084c8) at /test/10.7_dbg/storage/perfschema/pfs.cc:2201
      #12 0x000014c2b3118609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #13 0x000014c2b2d06293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      10.5.14 88b339805d7a9ddebc3fd61e9dee83270dbf474d (Optimized)

      Core was generated by `/test/MD121221-mariadb-10.5.14-linux-x86_64-opt/bin/mysqld --no-defaults --core'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  0x000014dcac134f47 in ha_spider::store_lock (lock_type=TL_READ_NO_INSERT, 
          to=0x14dc100574f8, thd=<optimized out>, this=0x14dc1007ae30)
          at /test/10.5_opt/storage/spider/ha_spider.cc:1178
      1178	            if (unlikely((store_error_num =
      [Current thread is 1 (Thread 0x14dcac917700 (LWP 3053217))]
      (gdb) bt
      #0  0x000014dcac134f47 in ha_spider::store_lock (lock_type=TL_READ_NO_INSERT, to=0x14dc100574f8, thd=<optimized out>, this=0x14dc1007ae30) at /test/10.5_opt/storage/spider/ha_spider.cc:1178
      #1  ha_spider::store_lock (this=0x14dc1007ae30, thd=<optimized out>, to=0x14dc100574f8, lock_type=TL_READ_NO_INSERT) at /test/10.5_opt/storage/spider/ha_spider.cc:1042
      #2  0x0000563f90a0d532 in get_lock_data (thd=thd@entry=0x14dc10000c58, table_ptr=table_ptr@entry=0x14dc10011488, count=count@entry=2, flags=<optimized out>) at /test/10.5_opt/sql/lock.cc:809
      #3  0x0000563f90a0d7f9 in mysql_lock_tables (thd=thd@entry=0x14dc10000c58, tables=0x14dc10011488, count=count@entry=2, flags=flags@entry=0) at /test/10.5_opt/sql/lock.cc:298
      #4  0x0000563f90678e5f in lock_tables (thd=thd@entry=0x14dc10000c58, tables=tables@entry=0x14dc100104d0, count=<optimized out>, flags=flags@entry=0) at /test/10.5_opt/sql/sql_base.cc:5512
      #5  0x0000563f906df414 in lock_tables_open_and_lock_tables (thd=thd@entry=0x14dc10000c58, tables=<optimized out>) at /test/10.5_opt/sql/sql_parse.cc:3024
      #6  0x0000563f906eafab in mysql_execute_command (thd=0x14dc10000c58) at /test/10.5_opt/sql/sql_parse.cc:5185
      #7  0x0000563f906d6243 in mysql_parse (thd=0x14dc10000c58, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>, is_com_multi=<optimized out>, is_next_command=<optimized out>) at /test/10.5_opt/sql/sql_parse.cc:8100
      #8  0x0000563f906e305d in dispatch_command (command=COM_QUERY, thd=0x14dc10000c58, packet=<optimized out>, packet_length=<optimized out>, is_com_multi=<optimized out>, is_next_command=<optimized out>) at /test/10.5_opt/sql/sql_class.h:1290
      #9  0x0000563f906e5832 in do_command (thd=0x14dc10000c58) at /test/10.5_opt/sql/sql_parse.cc:1370
      #10 0x0000563f907ed2e1 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x563f92eee4b8, put_in_cache=put_in_cache@entry=true) at /test/10.5_opt/sql/sql_connect.cc:1418
      #11 0x0000563f907ed75d in handle_one_connection (arg=arg@entry=0x563f92eee4b8) at /test/10.5_opt/sql/sql_connect.cc:1312
      #12 0x0000563f90b7d999 in pfs_spawn_thread (arg=0x563f92e5c908) at /test/10.5_opt/storage/perfschema/pfs.cc:2201
      #13 0x000014dcb8272609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #14 0x000014dcb7e60293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      10.8.0 ccdf5711a8fff0cd610a91fdcf37c8ff1182878c (Optimized)

      Core was generated by `/test/MD121221-mariadb-10.8.0-linux-x86_64-opt/bin/mysqld --no-defaults --core-'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  0x0000148c0417026d in ha_spider::lock_tables (this=0x148b94047530)
          at /test/10.8_opt/storage/spider/ha_spider.cc:16358
      16358	    if (!conns[search_link_idx])
      [Current thread is 1 (Thread 0x148c0474c700 (LWP 3053251))]
      (gdb) bt
      #0  0x0000148c0417026d in ha_spider::lock_tables (this=0x148b94047530) at /test/10.8_opt/storage/spider/ha_spider.cc:16358
      #1  0x0000148c04170744 in ha_spider::external_lock (this=0x148b9407d830, thd=<optimized out>, lock_type=<optimized out>) at /test/10.8_opt/storage/spider/ha_spider.cc:1342
      #2  0x000055accaf51484 in handler::ha_external_lock (this=0x148b9407d830, thd=thd@entry=0x148b94000c58, lock_type=lock_type@entry=0) at /test/10.8_opt/sql/handler.cc:7042
      #3  0x000055accb069c69 in lock_external (count=<optimized out>, tables=0x148b94061510, thd=0x148b94000c58) at /test/10.8_opt/sql/lock.cc:393
      #4  mysql_lock_tables (thd=0x148b94000c58, sql_lock=0x148b940614d8, flags=<optimized out>) at /test/10.8_opt/sql/lock.cc:338
      #5  0x000055accb06a98f in mysql_lock_tables (thd=thd@entry=0x148b94000c58, tables=0x148b94011948, count=count@entry=2, flags=flags@entry=0) at /test/10.8_opt/sql/lock.cc:301
      #6  0x000055accac916f3 in lock_tables (thd=thd@entry=0x148b94000c58, tables=tables@entry=0x148b94010980, count=<optimized out>, flags=flags@entry=0) at /test/10.8_opt/sql/sql_base.cc:5559
      #7  0x000055accacfc2b4 in lock_tables_open_and_lock_tables (thd=thd@entry=0x148b94000c58, tables=<optimized out>) at /test/10.8_opt/sql/sql_parse.cc:2958
      #8  0x000055accad074e7 in mysql_execute_command (thd=0x148b94000c58, is_called_from_prepared_stmt=<optimized out>) at /test/10.8_opt/sql/sql_parse.cc:5124
      #9  0x000055accacf3986 in mysql_parse (thd=0x148b94000c58, rawbuf=<optimized out>, length=<optimized out>, parser_state=<optimized out>) at /test/10.8_opt/sql/sql_parse.cc:8028
      #10 0x000055accacffb35 in dispatch_command (command=COM_QUERY, thd=0x148b94000c58, packet=<optimized out>, packet_length=<optimized out>, blocking=<optimized out>) at /test/10.8_opt/sql/sql_class.h:1360
      #11 0x000055accad01d27 in do_command (thd=0x148b94000c58, blocking=blocking@entry=true) at /test/10.8_opt/sql/sql_parse.cc:1402
      #12 0x000055accae202e7 in do_handle_one_connection (connect=<optimized out>, put_in_cache=true) at /test/10.8_opt/sql/sql_connect.cc:1418
      #13 0x000055accae2062d in handle_one_connection (arg=arg@entry=0x55acceae5be8) at /test/10.8_opt/sql/sql_connect.cc:1312
      #14 0x000055accb18e5d8 in pfs_spawn_thread (arg=0x55accea9d218) at /test/10.8_opt/storage/perfschema/pfs.cc:2201
      #15 0x0000148c0fe85609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #16 0x0000148c0fa73293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
      

      Bug confirmed present in:
      MariaDB: 10.5.14 (dbg), 10.5.14 (opt), 10.6.6 (dbg), 10.6.6 (opt), 10.7.2 (dbg), 10.7.2 (opt), 10.8.0 (dbg), 10.8.0 (opt)

      Bug (or feature/syntax) confirmed not present in:
      MariaDB: 10.2.42 (dbg), 10.2.42 (opt), 10.3.33 (dbg), 10.3.33 (opt), 10.4.23 (dbg), 10.4.23 (opt)
      MySQL: 5.5.62 (dbg), 5.5.62 (opt), 5.6.51 (dbg), 5.6.51 (opt), 5.7.36 (dbg), 5.7.36 (opt), 8.0.27 (dbg), 8.0.27 (opt)

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              Assignee:
              nayuta-yanagisawa Nayuta Yanagisawa
              Reporter:
              Roel Roel Van de Paar
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                Created:
                Updated:
                Resolved:

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