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(ITS#7723) slapd crashes on multi core machines if a search request is immediately followed by an unbind

To: openldap-its@OpenLDAP.org
Subject: (ITS#7723) slapd crashes on multi core machines if a search request is *immediately* followed by an unbind
From: michael.vishchers@7p-group.com
Date: Fri, 11 Oct 2013 13:27:04 GMT
Auto-submitted: auto-generated (OpenLDAP-ITS)

Full_Name: Michael Vishchers
Version: 2.4.36
OS: RHEL 6.3
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (109.41.86.33)


The bug mentioned in ITS #7716 unfortunately still persists in 2.4.36.

We now found a way to reproduce it:

- make sure that threads can run freely (i.e., provide enough cpus)
- start slapd with the rwm overlay
- run a client loop that
-- binds as a valid user
-- sends a valid search request that is *immediately* (i.e., don't wait for any
answers) followed by an unbind request

after several iterations (with 2.4.23 it was between 2 and 7, with 2.4.36 it was
about 30) slapd crashes in malloc.c

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(ITS#7723) slapd crashes on multi core machines if a search request is *immediately* followed by an unbind

(ITS#7723) slapd crashes on multi core machines if a search request is immediately followed by an unbind