[389-users] Segfault & Core Dumps

[Dael Maselli]

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.

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
___________________________________________________________________

             * Il Buco Nero * http://www.buconero.eu *
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Democracy is two wolves and a lamb voting on what to have for lunch
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