-jailshell: double free or corruption

walt

Member
Oct 30, 2015
14
0
1
Houston, Tx
cPanel Access Level
Website Owner
Hello, I received this error today, while trying to login remotely, using SSH:

Code:
lock file /home/virtfs/_lock/32865 created by pid 68579 was not removed before the process died.
*** glibc detected *** -jailshell: double free or corruption (out): 0x00000000025caba0 ***
I was logging in to try and diagnose another error: Bouncing emails when forwarding emails from one of my email accounts to a php script. The 2 errors look very similar, and might have the same cause? Here is the email error:

Code:
The following text was generated during the delivery attempt:

------ pipe to |/home2/myusername/system/services/ppipn/ipn_process/ipn_process.php
       generated by [email protected] ------

*** glibc detected *** /usr/local/cpanel/bin/jailexec: double free or corruption (out): 0x0000000001c2eba0 ***
They both seem to have happened together, today. I have created a ticket with my service provider, and will post back on what they find. I have a shared account, so very limited (pretty much none) access to the interesting bits of the server. However, if this rings a bell with anyone, any input would be appreciated, even something I cannot do anything about.

Apologies, since I am unable to log in remotely, I can't run this command:
Code:
grep '' /etc/redhat-release /usr/local/cpanel/version /var/cpanel/envtype ; grep CPANEL= /etc/cpupdate.conf ; httpd -v ; php -v ; mysql -V
 
Last edited:

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,224
463
Hello :)

It's possible you are triggering a resource limit. Please let us know the outcome of your support inquiry with your hosting provider.

Thank you.
 

walt

Member
Oct 30, 2015
14
0
1
Houston, Tx
cPanel Access Level
Website Owner
Thanks Michael, there is no update on the ticket, but there is some new info.

I checked to see if there was some resource limit I might be reaching, but did not find anything. The cPanel graph "CPU seconds over 24 hours" shows peaks of about 300 cpu seconds/24hrs. I have seen that before, while working on my Paypal integration and digital good download. However, that has been pretty much done for several weeks. Not sure where those spikes are coming from now, especially since the system was down due to the problem I am posting about.

Remote login, and forwarding emails to php scripts are both working again. Only one error shows up when logging in remotely, but the connection stays open and works fine:
Code:
Last login: Thu Jan 28 22:34:03 2016 from myip.hsd1.tx.comcast.net
lock file /home/virtfs/_lock/32865 created by pid 68579 was not removed before the process died.
After running the command to get the server info, I noticed this line:
-jailshell: httpd: command not found
'-jailshell' keeps popping up in a negative context.

Code:
[~/system/services]# grep '' /etc/redhat-release /usr/local/cpanel/version /var/cpanel/envtype ; grep CPANEL= /etc/cpupdate.conf ; httpd -v ; php -v ; mysql -V

grep: /etc/redhat-release: No such file or directory
/usr/local/cpanel/version:11.48.5.3
/var/cpanel/envtype:standard
grep: /etc/cpupdate.conf: No such file or directory
-jailshell: httpd: command not found
PHP 5.4.45 (cli) (built: Oct  5 2015 15:35:12)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
  with the ionCube PHP Loader v4.7.4, Copyright (c) 2002-2014, by ionCube Ltd., and
  with Zend Guard Loader v3.3, Copyright (c) 1998-2013, by Zend Technologies
mysql  Ver 14.14 Distrib 5.5.42-37.1, for Linux (x86_64) using readline 5.1
 
Last edited:

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,224
463
The lack of root access limits your ability to troubleshoot an issue such as this. Feel free to update this thread with the outcome of your provider's investigation when they send a response.

Thank you.
 

walt

Member
Oct 30, 2015
14
0
1
Houston, Tx
cPanel Access Level
Website Owner
The response:
The error you received was the result of an old bug related to SSH for cPanel. I apologize for any inconvenience. cPanel 11.52 corrects this bug, so I'm hopeful you shouldn't encounter it again moving forward.
An old bug that only showed up last week, sounds a bit fishy. Where has it been hiding for the last 6 years? :).
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,224
463
You could ask them to provide the case number, or request they update the version of cPanel on that system to 11.52 if they have not already done so.

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,224
463
Feel free to let us know if you encounter any additional issues.

Thank you.