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

Friday, 11 October 2013

michael.vishchers(a)7p-group.com wrote:
...
 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) 
If your client loop is running as a single thread then the number of CPUs and 
running threads should be irrelevant. If the number of threads and CPUs matter 
then you're misusing the API. Closing this ITS.

...
 - 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

-- 
   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/

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