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  1. MariaDB Server
  2. MDEV-11883

MariaDB crashes with out-of-memory when query information_schema

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      Description

      Hi,

      I use MariaDB in an embedded Linux system with read-only mounted datadir. Event-Scheduler is DISABLED, so I can start mysqld.

      When I query information_schema tables that uses "Open_full_table; Scanned all databases" Extra on select, then the query hangs until an out-of-memory exception occurs. The mysqld daemon is restarted.

      Query:

      SELECT * FROM information_schema.tables

      Exception:

      [28200.389724] Out of memory: Kill process 4478 (mysqld) score 612 or sacrifice child [28200.412466] Killed process 4478 (mysqld) total-vm:912336kB, anon-rss:615564kB, file-rss:516kB

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            Assignee:
            serg Sergei Golubchik
            Reporter:
            christian.stern Christian Stern
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