Re: (ITS#9045) Crashes in cn=config (test050)

[ondra@openldap.org]

On Fri, Jun 28, 2019 at 09:49:51AM +0000, ondra@openldap.org wrote:
> Every so often (roughly once in a thousand runs or so it seems), a server will
> crash in test050 on master. This test replicates cn=config which is not
> officially supported yet.
> 
> Some output from a gdb session from the core is uploaded here:
> ftp://ftp.openldap.org/incoming/test050-crash-master-20190628.txt
> 
> It's not clear to me how attrs_dup has reached the attribute at 0x170b6a8 unless
> there was another thread messing with the same structure. str2entry2 is running
> in another thread, but I wouldn't think it runs on the same entry? Stuff is
> optimised out in this one.

Another crash, this time with better logs and an unoptimized binary:
ftp://ftp.openldap.org/incoming/test050-crash-20190702.txz

Again, attribute is being accessed that seems to have been cleaned and
released and another thread is running str2entry2 (on cn=config as well,
just with a different pointer), might still be a red herring.

Regards,

-- 
OndÅ?ej Kuzník
Senior Software Engineer
Symas Corporation                       http://www.symas.com
Packaged, certified, and supported LDAP solutions powered by OpenLDAP