Bug #70185 [NEW]: php-fpm restarts process forever when exec() and using ssh multiplexing

From:	kobenews at cox dot net	Date:	Mon, 03 Aug 2015 02:54:44 +0000
Subject:	Bug #70185 [NEW]: php-fpm restarts process forever when exec() and using ssh multiplexing
Groups:	php.bugs
Request:	Send a blank email to php-bugs+get-194918@lists.php.net to get a copy of this message

From:             kobenews at cox dot net
Operating system: CentOS release 6.6 (Final)
PHP version:      5.4.43
Package:          FPM related
Bug Type:         Bug
Bug description:php-fpm restarts process forever when exec() and using ssh multiplexing 

Description:
------------
Ok bear with me, this bug is a bit obscure and takes some setup.
However, it is consistent, and causes php-fpm to continue to restart the
process over and over again using 100% of the CPU on the php-fpm master
process.

It only occurs with SSH controlMaster which basically allows SSH
connection multiplexing.

Here is an example code:

<?php
    $command = 'ssh -o "ControlMaster=auto" -o "ControlPersist=2m" -S
/home/justin/.ssh/sockets/justin.sock justin@1.2.3.4';
    $output = exec($command, $output_array, $return_code);


If you remove the options -o "ControlMaster=auto" -o "ControlPersist=2m"
-S /home/justin/.ssh/sockets/justin.sock this works without crashing
over and over again.

Test script:
---------------
<?php
    $command = 'ssh -o "ControlMaster=auto" -o "ControlPersist=2m" -S
/home/justin/.ssh/sockets/justin.sock justin@1.2.3.4';
    $output = exec($command, $output_array, $return_code);

Expected result:
----------------
php-fpm master process should not restart the process over and over
again. Nothing is crashing here.

Actual result:
--------------
php-fpm continues to restart the process over and over again using 100%
of the CPU on the php-fpm master process.

-- 
Edit bug report at https://bugs.php.net/bug.php?id=70185&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=70185&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=70185&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=70185&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=70185&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=70185&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=70185&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=70185&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=70185&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=70185&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=70185&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=70185&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=70185&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=70185&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70185&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=70185&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=70185&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=70185&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=70185&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=70185&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=70185&r=mysqlcfg



   

Thread (28 messages)

• kobenews at cox dot netMon, 03 Aug 2015 02:54:44 +0000
  • kobenews at cox dot netMon, 03 Aug 2015 03:21:06 +0000Bug #70185 [Opn]: php-fpm restarts process forever when exec() and using ssh multiplexing
  • kobenews at cox dot netFri, 07 Aug 2015 20:13:58 +0000Bug #70185 [Opn]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at plainview dot seTue, 08 Sep 2015 20:39:32 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • kobenews at cox dot netWed, 09 Sep 2015 02:18:53 +0000Bug #70185 [Opn]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • i dot priladnyh at gmail dot comFri, 22 Jan 2016 08:06:12 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • sylvain at com-ocean dot comFri, 24 Feb 2017 13:52:10 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comFri, 10 Mar 2017 20:03:51 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • kobenews at cox dot netFri, 10 Mar 2017 23:14:06 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comMon, 13 Mar 2017 14:31:13 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comSat, 18 Mar 2017 21:35:49 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • please at forget dot me dot ukFri, 24 Mar 2017 09:36:20 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comThu, 13 Apr 2017 08:43:58 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • merrill at oakland dot eduThu, 13 Apr 2017 20:22:03 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • jlaustill at gmail dot comMon, 17 Apr 2017 20:22:04 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comThu, 20 Apr 2017 09:37:16 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comMon, 24 Apr 2017 22:49:55 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • spam2 at rhsoft dot netTue, 25 Apr 2017 05:24:06 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comTue, 25 Apr 2017 10:24:24 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comTue, 25 Apr 2017 11:28:57 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • spam2 at rhsoft dot netTue, 25 Apr 2017 11:36:00 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • merrill at oakland dot eduTue, 25 Apr 2017 14:04:20 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • php at grindau dot comTue, 25 Apr 2017 14:24:15 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • d dot reade at reades dot co dot ukFri, 21 Jul 2017 09:36:49 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • mike at sagesolutionsinc dot caThu, 21 Sep 2017 18:07:21 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • schnederle at futureweb dot atFri, 16 Feb 2018 15:09:41 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • schnederle at futureweb dot atFri, 16 Feb 2018 15:24:12 +0000Bug #70185 [Com]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing
  • nikic@php.netFri, 23 Feb 2018 16:55:17 +0000Bug #70185 [Opn->Dup]: php-fpm restarts master process in a loop when exec() and using ssh multiplexing