[389-users] Segfault & Core Dumps

[Dael Maselli]

  Ok, I backtraced the coredump, the problem was in /usr/lib64/libssl3.so.

I updated from "nss-3.12.6-1.el5_4.x86_64" to "nss-3.12.7-2.el5.x86_64" 
and now all seems to work fine!

Thank you.

Regards,
     Dael Maselli.


On 08/09/10 15.16, Rich Megginson wrote:
> Dael Maselli wrote:
>> It worked!
>>
>> I wrote fs.suid_dumpable=1 in /etc/sysctl.conf, `sysctl -p` and
>> restarted dirsrv. Now it dumps.
>>
>> Thank you!
>>
>> I will report here the backtrace when it occurs.
> Great!  Be sure to install the 389-ds-base-debuginfo package to get the
> symbols when generating the backtrace.
>> Regards,
>>      Dael Maselli.
>>
>>
>>
>> On 07/09/10 19.44, Ulf Weltman wrote:
>>> On 9/7/2010 8:25 AM, Dael Maselli wrote:
>>>> Hi Rich,
>>>>
>>>> On 07/09/10 16.56, Rich Megginson wrote:
>>>>> Do you see seg fault messages in /var/log/messages?
>>>> Sure: ns-slapd[13737]: segfault at 00000000000000bc rip
>>>> 0000003abb420375
>>>> rsp 00000000580d85d0 error 4
>>>>
>>>>
>>>>> The directory server dumps core in the log file directory, which by
>>>>> default is /var/log/dirsrv/slapd-INSTANCE
>>>> Yes, it is the same as working directory:
>>>> # ls -l /proc/`pidof ns-slapd`/cwd
>>>> lrwxrwxrwx 1 root root 0 Sep 7 17:12 /proc/18721/cwd ->
>>>> /var/log/dirsrv/slapd-ds1
>>>>
>>>>
>>>>> Is the crash easily reproducible?
>>>> No, it isn't. It seems random, but I can simulate a crash with kill
>>>> -QUIT.
>>>>
>>>> I tried killing a simple `sleep 10`:
>>>>
>>>> # ulimit -c unlimited
>>>>
>>>> # sleep 10&
>>>> [1] 19726
>>>>
>>>> # kill -QUIT 19726
>>>> [1]+ Quit (core dumped) sleep 10
>>>>
>>>> # ls -l core.*
>>>> -rw------- 1 root root 290816 Aug 31 08:52 core.1008
>>>>
>>>> But if I kill -QUIT ns-slapd no file is created.
>>> ns-slapd typically runs as setuid to a non-root user. Check what
>>> fs.suid_dumpable or kernel.suid_dumpable are set to.
>>>> Thanks,
>>>> Dael Maselli.
>>>>
>>>>
>>>
>>>
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-- 
___________________________________________________________________

Dael Maselli  ---  INFN-LNF Computing Service  --  +39.06.9403.2214
___________________________________________________________________

    * http://www.FrascatiScienza.it/ * http://www.BucoNero.eu/ *
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