WordPress/Joomla applications are not working on PHP 7

Created:

2016-12-12 03:39:03 UTC

Modified:

2017-08-08 13:42:32 UTC

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WordPress/Joomla applications are not working on PHP 7

Applicable to:

  • Plesk 12.5 for Linux

Symptoms

  1. WordPress/Joomla applications are not working on PHP 7. It works for other PHP versions
  2. Output of journalctl -xn has the following error:

    Oct 28 12:14:08 ip-172-10-111-74.ec2.internal kernel: PAX: terminating task: /opt/plesk/php/7.0/sbin/php-fpm(php-fpm):87458, uid/euid: 10003/10003, PC: 0000716eb1d5a010, SP: 000073b955
    Oct 28 12:14:08 ip-172-10-111-74.ec2.internal kernel: PAX: bytes at PC: 53 41 57 41 56 41 55 55 48 8b df 48 83 ec 50 48 8b 43 10 48
    Oct 28 12:14:08 ip-172-10-111-74.ec2.internal kernel: PAX: bytes at SP-8: 0000000003ecf598 00000000004b4b21 0000000003d24540 0000716eace57298 0000716eace57298 0000716eace5729e 000073b9
    Oct 28 12:14:08 ip-172-10-111-74.ec2.internal kernel: grsec: denied resource overstep by requesting 4096 for RLIMIT_CORE against limit 0 for /opt/plesk/php/7.0/sbin/php-fpm[php-fpm:874
  3. Atomic Secured Linux(ASL) kernel is enabled on the server.

    # uname -a
    Linux ip-172-10-111-74.ec2.internal 3.14.75-8.el7.lowsecurity.art.x86_64 #1 SMP Fri Aug 12 16:10:34 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux
    # uname -r
    3.14.75-8.el7.lowsecurity.art.x86_64

Cause

Atomic Secured Linux(ASL) kernel limits resource allocation by plesk-php7-fpm process.

Resolution

Plesk is not tested on compatibility with ASL kernel. Contact Atomic Support to fix the issue.

OR

Change kernel to the non-ASL one.

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