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  1. MariaDB Server
  2. MDEV-15029

XA COMMIT and XA ROLLBACK operate on freed transaction object

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      Description

      The functions innobase_commit_by_xid() and innobase_rollback_by_xid(), which implement XA ROLLBACK and XA COMMIT for XA PREPARE transactions that are no longer attached to a connection, are freeing the transaction object to the pool prematurely, and then modifying the trx_t::in_depth and trx::in_innodb fields of the freed object. While the object is already free in the pool, it could be reused by trx_create_low() by some other connection. This could cause memory corruption and cause bugs like MDEV-14128 and MDEV-13935.

      This bug was caught after adding AddressSanitizer poisoning to the transaction Pool.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-13935 INSERT INTO stuck at state "Unlocking tables"

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-14128 Assertion `trx->in_depth > 0' failed in TrxInInnoDB::exit

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-15030 Add ASAN instrumentation

          • Major - Major loss of function.
          • Closed

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              marko Marko Mäkelä
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                Created:
                Updated:
                Resolved:

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