Error "Illegal instruction (4)" after logging in

[atroxix]

Steps to reproduce

1. Open web browser without an active Nextcloud session
2. Log in

Expected behaviour

Nextcloud should function properly.

Actual behaviour

Getting "internal error", Apache logs the following error on each access:
[Tue Sep 11 10:58:02.006363 2018] [core:notice] [pid 37197] AH00052: child pid 37372 exit signal Illegal instruction (4)

Server configuration

Operating system: FreeBSD 11.2

Web server: Apache 2.4

Database: MariaDB 10.3.8

PHP version: 7.2.9

Nextcloud version: 14.0.0

Updated from an older Nextcloud/ownCloud or fresh install: Upgraded from 13.0.6

Where did you install Nextcloud from: FreeBSD ports

# sudo -u www php occ integrity:check-core
# sudo -u www php occ app:list | while read line; do app="`echo "$line" | awk '{print $2}' | awk -F ':' '{print $1}'`" ; if [ "$app" = "" ]; then continue ; else echo "Checking '$app'" ; fi ; sudo -u www php occ integrity:check-app $app ; done                                               
Checking 'accessibility'
Checking 'activity'
Checking 'cloud_federation_api'
Checking 'comments'
Checking 'dav'
Checking 'federatedfilesharing'
Checking 'files'
Checking 'files_pdfviewer'
Checking 'files_sharing'
Checking 'files_texteditor'
Checking 'files_trashbin'
Checking 'files_versions'
Checking 'files_videoplayer'
Checking 'gallery'
Checking 'lookup_server_connector'
Checking 'notifications'
Checking 'oauth2'
Checking 'provisioning_api'
Checking 'sharebymail'
Checking 'support'
Checking 'theming'
Checking 'twofactor_backupcodes'
Checking 'updatenotification'
Checking 'workflowengine'
Checking 'admin_audit'
Checking 'encryption'
Checking 'federation'
Checking 'files_external'
Checking 'firstrunwizard'
Checking 'logreader'
Checking 'nextcloud_announcements'
Checking 'password_policy'
Checking 'serverinfo'
Checking 'socialsharing_email'
  - EXCEPTION:
    - class: OC\IntegrityCheck\Exceptions\InvalidSignatureException
    - message: Signature data not found.
Checking 'socialsharing_facebook'
  - EXCEPTION:
    - class: OC\IntegrityCheck\Exceptions\InvalidSignatureException
    - message: Signature data not found.
Checking 'survey_client'
Checking 'systemtags'
Checking 'user_external'
Checking 'user_ldap'

List of activated apps:

# sudo -u www php occ app:list
Enabled:
  - accessibility: 1.0.1
  - activity: 2.7.0
  - cloud_federation_api: 0.0.1
  - comments: 1.4.0
  - dav: 1.6.0
  - federatedfilesharing: 1.4.0
  - files: 1.9.0
  - files_pdfviewer: 1.3.2
  - files_sharing: 1.6.2
  - files_texteditor: 2.6.0
  - files_trashbin: 1.4.1
  - files_versions: 1.7.1
  - files_videoplayer: 1.3.0
  - gallery: 18.1.0
  - lookup_server_connector: 1.2.0
  - notifications: 2.2.1
  - oauth2: 1.2.1
  - provisioning_api: 1.4.0
  - sharebymail: 1.4.0
  - support: 1.0.0
  - theming: 1.5.0
  - twofactor_backupcodes: 1.3.1
  - updatenotification: 1.4.1
  - workflowengine: 1.4.0
Disabled:
  - admin_audit
  - encryption
  - federation
  - files_external
  - firstrunwizard
  - logreader
  - nextcloud_announcements
  - password_policy
  - serverinfo
  - socialsharing_email
  - socialsharing_facebook
  - survey_client
  - systemtags
  - user_external
  - user_ldap</summary>

Nextcloud configuration:

Config report

# sudo -u www php occ config:list system
{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "14.0.0.19",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "theme": "",
        "trusted_domains": [
            "...",
            "...",
            "..."
        ],
        "forcessl": false,
        "mail_smtpmode": "smtp",
        "updatechecker": false,
        "secret": "***REMOVED SENSITIVE VALUE***",
        "singleuser": false,
        "loglevel": 2,
        "logfile": "\/var\/log\/nextcloud.log",
        "trashbin_retention_obligation": "auto",
        "filelocking.enabled": "true",
        "memcache.locking": "\\OC\\Memcache\\APCu",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/...\/",
        "htaccess.RewriteBase": "\/new",
        "mysql.utf8mb4": true,
        "maintenance": false,
        "apps_paths": [
            {
                "path": "\/usr\/local\/www\/nextcloud\/apps",
                "url": "\/apps",
                "writable": true
            },
            {
                "path": "\/usr\/local\/www\/nextcloud\/apps-pkg",
                "url": "\/apps-pkg",
                "writable": false
            }
        ],
        "mail_smtpauthtype": "LOGIN",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***"
    }
}

Are you using external storage, if yes which one: no

Are you using encryption: no

Are you using an external user-backend, if yes which one: no

Client configuration

Browser: Chrome, Opera, Nextcloud client

Operating system: Windows 7

Logs

Web server error log

Web server error log

[Tue Sep 11 12:01:29.917852 2018] [core:notice] [pid 40728] AH00052: child pid 41152 exit signal Illegal instruction (4)

Nextcloud log (data/nextcloud.log)

Nextcloud log

The last entry: ``` {"reqId":"DNQM54coJbKNgHkeYTxv","level":1,"time":"2018-09-11T07:37:04+00:00","remoteAddr":"10.0.254.1","user":"--","app":"updater","method":"GET","url":"\/core\/ajax\/update.php?requesttoken=...","message":"\\OC\\Updater::resetLogLevel: Reset log level to Warning(2)","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/68.0.3440.106 Safari\/537.36 OPR\/55.0.2994.56","version":"14.0.0.19"} ```

[nextcloud-bot]

GitMate.io thinks possibly related issues are #2304 (Config error should not lead to user passwords in log), #3768 (Error logged when creating a new share), #4534 (Error logged on upgrade), #10521 (Log errors related to doctrine (but nothings broken?)), and #2218 (Error thrown after installation).

[timm2k]

You have to provide the app-id you want to check...

sudo -u www php occ integrity:check-app calendar

see https://docs.nextcloud.com/server/14/admin_manual/issues/code_signing.html?highlight=integrity%20check%20app#rescans

[atroxix]

Okay, I updated my original information in that place.

[atroxix]

One more thing about it...

At first I could successfully login, and as apps socialsharing_email and socialsharing_facebook were disabled I went on to enable them.
When I clicked on Update button, I was asked password, and as my password is quite long, I got an error message stating that typing password timed out (or something like that).
I did it a few times and then suddenly got that "Illegal instruction" error.

Does this perhaps help in guessing what could have gone wrong?

[atroxix]

It seems my PHP modules were somehow broken or with invalid flags. I just re-installed all PHP modules from FreeBSD packages (portupgrade -PP) and Nextcloud started working again.