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  1. MariaDB Server
  2. MDEV-11602

InnoDB leaks foreign key metadata on DDL operations

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      Description

      A memory leak was introduced in MDEV-6759 to address a ‘valgrind failure’ which looks like a double free when running ./mtr main.alter_table. Here is a simple test case that will trigger LeakSanitizer when building 10.1 with cmake -DWITH_ASAN=ON:

      --source include/have_innodb.inc
      CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=INNODB;
      CREATE TABLE t2 (id INT PRIMARY KEY, t1_id INT, FOREIGN KEY (t1_id) REFERENCES t1(id)) ENGINE=INNODB;
      DROP TABLE t2,t1;
      

      With a fix in place, these memory leaks are gone, but there are some others. In 10.1.21, all of --suite=innodb,innodb_fts,innodb_zip,encryption completed fine. So did main.alter_table. Tests for --suite=main are still running.

      I will test 10.0 too to see if a double free in main.alter_table can be observed there.

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              marko Marko Mäkelä
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