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  1. MariaDB Server
  2. MDEV-28934

UBSAN runtime error: downcast of address which does not point to an object of type 'Item_cond'

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 10.5, 10.6, 10.7, 10.8, 10.9, 10.10
    • Fix Version/s: 10.5, 10.6, 10.7, 10.8, 10.9
    • Component/s: Optimizer
    • Labels:
      None

      Description

      CREATE TABLE t (a INT NOT NULL);
      INSERT INTO t VALUES (1),(2); # Optional, fails either way
      SELECT * FROM t WHERE (a = 1 OR a = 5) AND (a IS NULL OR a = 1);
       
      # Cleanup
      DROP TABLE t;
      

      10.5 35f2cdcb

      /data/src/10.5/sql/sql_select.cc:17728:9: runtime error: downcast of address 0x7fe4c00178f8 which does not point to an object of type 'Item_cond'
      0x7fe4c00178f8: note: object is of type 'Item_equal'
       a5 a5 a5 a5  28 f6 dd 5d 94 55 00 00  15 00 00 00 00 00 00 00  00 a5 a5 a5 a5 a5 a5 a5  20 fc 33 60
                    ^~~~~~~~~~~~~~~~~~~~~~~
                    vptr for 'Item_equal'
      /data/src/10.5/sql/sql_select.cc:17728:42: runtime error: member call on address 0x7fe4c00178f8 which does not point to an object of type 'Item_cond'
      0x7fe4c00178f8: note: object is of type 'Item_equal'
       a5 a5 a5 a5  28 f6 dd 5d 94 55 00 00  15 00 00 00 00 00 00 00  00 a5 a5 a5 a5 a5 a5 a5  20 fc 33 60
                    ^~~~~~~~~~~~~~~~~~~~~~~
                    vptr for 'Item_equal'
      /data/src/10.5/sql/sql_select.cc:17731:8: runtime error: downcast of address 0x7fe4c00178f8 which does not point to an object of type 'Item_cond'
      0x7fe4c00178f8: note: object is of type 'Item_equal'
       a5 a5 a5 a5  28 f6 dd 5d 94 55 00 00  15 00 00 00 00 00 00 00  00 a5 a5 a5 a5 a5 a5 a5  20 fc 33 60
                    ^~~~~~~~~~~~~~~~~~~~~~~
                    vptr for 'Item_equal'
      /data/src/10.5/sql/sql_select.cc:17731:41: runtime error: member call on address 0x7fe4c00178f8 which does not point to an object of type 'Item_cond'
      0x7fe4c00178f8: note: object is of type 'Item_equal'
       a5 a5 a5 a5  28 f6 dd 5d 94 55 00 00  15 00 00 00 00 00 00 00  00 a5 a5 a5 a5 a5 a5 a5  20 fc 33 60
                    ^~~~~~~~~~~~~~~~~~~~~~~
                    vptr for 'Item_equal'
      

      Probably 10.3-10.4 are affected too, but we don't consider them properly UBSAN-able.

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            Assignee:
            psergei Sergei Petrunia
            Reporter:
            elenst Elena Stepanova
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              Dates

              Created:
              Updated:

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