https://bugs.openldap.org/show_bug.cgi?id=9643

          Issue ID: 9643
           Summary: back-wt: entry_decode failure.
           Product: OpenLDAP
           Version: 2.5.6
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: ---
         Component: backends
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

https://bugs.openldap.org/show_bug.cgi?id=9463

ondra mentioned:

> e.g. ./run -b wt -l 50 test034

I reproduced the issue by iterating test034.
And I figure out the issue is in entry_encode/decode.
It happens stochastically by reading memory outside the malloc area when
decoding special entry (only dn entry without attributes).
Since entry_encode/decode was originally used by back-bdb and back-hdb, these
backends also had this problem.
Currently It seems that only back-wt is using entry_encode/decode.
I'll fork entry_encode/decode and create wt_entry_encode/decode.
Then, we can remove entry_encode/decode.

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