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  1. MariaDB Server
  2. MDEV-20395

Assertion `!found' failed in remove_ptr_from_dynarray upon operations with roles

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      Note: It's a fragile test, often changing a single letter makes the failure stop happening. But this one currently fails for me every time on all debug builds.

      CREATE USER foo@localhost;
      GRANT ALL ON *.* TO foo@localhost;
      --connect (con1,localhost,foo,,test)
      CREATE ROLE g;
      CREATE ROLE mri;
      CREATE ROLE c;
      CREATE ROLE rnd;
      CREATE ROLE x;
      CREATE ROLE ura;
      CREATE ROLE y;
      CREATE ROLE kauhea;
      CREATE ROLE zoo;
      CREATE ROLE wonder;
      CREATE ROLE u;
      CREATE ROLE o;
      CREATE ROLE z;
      CREATE ROLE q;
      CREATE ROLE k;
      CREATE ROLE e WITH ADMIN k;
      CREATE ROLE ugm;
      CREATE OR REPLACE ROLE k;
      CREATE USER l;
      DROP ROLE k;
      

      10.4 c5bc0ced

      mysqld: /data/src/10.4/sql/sql_acl.cc:3521: void remove_ptr_from_dynarray(DYNAMIC_ARRAY*, void*): Assertion `!found' failed.
      190820 21:17:42 [ERROR] mysqld got signal 6 ;
       
      #7  0x00007f49da721f12 in __GI___assert_fail (assertion=0x5567384845d1 "!found", file=0x556738483ab8 "/data/src/10.4/sql/sql_acl.cc", line=3521, function=0x5567384866a0 <remove_ptr_from_dynarray(st_dynamic_array*, void*)::__PRETTY_FUNCTION__> "void remove_ptr_from_dynarray(DYNAMIC_ARRAY*, void*)") at assert.c:101
      #8  0x00005567377cedc4 in remove_ptr_from_dynarray (array=0x7f49c4182298, ptr=0x7f49b8029048) at /data/src/10.4/sql/sql_acl.cc:3521
      #9  0x00005567377e45cf in handle_grant_struct (struct_no=ROLE_ACL, drop=true, user_from=0x7f49b8011ef0, user_to=0x0) at /data/src/10.4/sql/sql_acl.cc:9978
      #10 0x00005567377e5656 in handle_grant_data (thd=0x7f49b8000b00, tables=..., drop=true, user_from=0x7f49b8011ef0, user_to=0x0) at /data/src/10.4/sql/sql_acl.cc:10481
      #11 0x00005567377e621e in mysql_drop_user (thd=0x7f49b8000b00, list=..., handle_as_role=true) at /data/src/10.4/sql/sql_acl.cc:10722
      #12 0x00005567378a06d6 in mysql_execute_command (thd=0x7f49b8000b00) at /data/src/10.4/sql/sql_parse.cc:5235
      #13 0x00005567378a92dd in mysql_parse (thd=0x7f49b8000b00, rawbuf=0x7f49b8011e68 "DROP ROLE k", length=11, parser_state=0x7f49d48a8170, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:7908
      #14 0x0000556737895586 in dispatch_command (command=COM_QUERY, thd=0x7f49b8000b00, packet=0x7f49b8008331 "DROP ROLE k", packet_length=11, is_com_multi=false, is_next_command=false) at /data/src/10.4/sql/sql_parse.cc:1843
      #15 0x0000556737893ccc in do_command (thd=0x7f49b8000b00) at /data/src/10.4/sql/sql_parse.cc:1360
      #16 0x0000556737a0de00 in do_handle_one_connection (connect=0x55673ab94040) at /data/src/10.4/sql/sql_connect.cc:1404
      #17 0x0000556737a0db4f in handle_one_connection (arg=0x55673ab94040) at /data/src/10.4/sql/sql_connect.cc:1306
      #18 0x0000556738339f65 in pfs_spawn_thread (arg=0x55673ac33070) at /data/src/10.4/storage/perfschema/pfs.cc:1862
      #19 0x00007f49dc2964a4 in start_thread (arg=0x7f49d48a9700) at pthread_create.c:456
      #20 0x00007f49da7ded0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
      

      Reproducible on all of 10.1-10.5.
      No obvious failure on a non-debug build, but there can easily be hidden ones.

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            • Assignee:
              sanja Oleksandr Byelkin
              Reporter:
              elenst Elena Stepanova
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              • Created:
                Updated: