[Bug]: DocumentConversionException: Segmentation fault (core dumped)

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• Nextcloud Server is running on 64bit capable CPU, PHP and OS.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

[index] Error: OCA\DocumentServer\Document\DocumentConversionException: Segmentation fault (core dumped)
at <>

0. /var/www/html/nextcloud/apps/documentserver_community/lib/DocumentConverter.php line 125
   OCA\DocumentServer\Document\ConverterBinary->run()
1. /var/www/html/nextcloud/apps/documentserver_community/lib/Document/DocumentStore.php line 255
   OCA\DocumentServer\DocumentConverter->runCommand()
2. /var/www/html/nextcloud/apps/documentserver_community/lib/LocalAppData.php line 102
   OCA\DocumentServer\Document\DocumentStore->OCA\DocumentServer\Document{closure}("*** sensitive parameters replaced ***")
3. /var/www/html/nextcloud/apps/documentserver_community/lib/Document/DocumentStore.php line 256
   OCA\DocumentServer\LocalAppData->getReadWriteLocalPath()
4. /var/www/html/nextcloud/apps/documentserver_community/lib/Controller/ConvertController.php line 60
   OCA\DocumentServer\Document\DocumentStore->convert()
5. /var/www/html/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 225
   OCA\DocumentServer\Controller\ConvertController->convert()
6. /var/www/html/nextcloud/lib/private/AppFramework/Http/Dispatcher.php line 133
   OC\AppFramework\Http\Dispatcher->executeController()
7. /var/www/html/nextcloud/lib/private/AppFramework/App.php line 172
   OC\AppFramework\Http\Dispatcher->dispatch()
8. /var/www/html/nextcloud/lib/private/Route/Router.php line 298
   OC\AppFramework\App::main()
9. /var/www/html/nextcloud/lib/base.php line 1047
   OC\Route\Router->match()
10. /var/www/html/nextcloud/index.php line 36
    OC::handleRequest()

POST /index.php/apps/documentserver_community/ConvertService.ashx
from 188.215.78.202 at 2022-12-12T09:57:05+00:00

Steps to reproduce

1.apears every time cron.php is run!
2.
3.

Expected behavior

no error

Installation method

Community Manual installation with Archive

Operating system

Debian/Ubuntu

PHP engine version

PHP 7.4

Web server

Apache (supported)

Database engine version

MySQL

Is this bug present after an update or on a fresh install?

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.grosu.ro"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "25.0.2.3",
        "overwrite.cli.url": "http:\/\/cloud.grosu.ro\/nextcloud",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "default_phone_region": "RO",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Memcached",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "app_install_overwrite": [
            "twofactor_admin",
            "files_antivirus",
            "apporder",
            "impersonate"
        ],
        "maintenance": false,
        "theme": "",
        "loglevel": 2,
        "updater.release.channel": "stable",
        "mail_smtpsecure": "tls"
    }
}

List of activated Apps

Enabled:
  - activity: 2.17.0
  - admin_audit: 1.15.0
  - announcementcenter: 6.4.0
  - appointments: 1.14.7
  - apporder: 0.15.0
  - approval: 1.0.10
  - bruteforcesettings: 2.5.0
  - calendar: 4.1.0
  - circles: 25.0.0
  - cloud_federation_api: 1.8.0
  - comments: 1.15.0
  - contacts: 5.0.1
  - contactsinteraction: 1.6.0
  - dashboard: 7.5.0
  - dav: 1.24.0
  - deck: 1.8.2
  - documentserver_community: 0.1.13
  - event_update_notification: 2.0.0
  - external: 5.0.0
  - federatedfilesharing: 1.15.0
  - federation: 1.15.0
  - files: 1.20.1
  - files_accesscontrol: 1.15.0
  - files_antivirus: 4.0.1
  - files_automatedtagging: 1.15.0
  - files_pdfviewer: 2.6.0
  - files_retention: 1.14.0
  - files_rightclick: 1.4.0
  - files_sharing: 1.17.0
  - files_trashbin: 1.15.0
  - files_versions: 1.18.0
  - firstrunwizard: 2.14.0
  - groupfolders: 13.1.0
  - impersonate: 1.11.0
  - logreader: 2.10.0
  - lookup_server_connector: 1.13.0
  - nextcloud_announcements: 1.14.0
  - notifications: 2.13.1
  - oauth2: 1.13.0
  - onlyoffice: 7.6.8
  - password_policy: 1.15.0
  - photos: 2.0.1
  - privacy: 1.9.0
  - provisioning_api: 1.15.0
  - quota_warning: 1.15.0
  - recommendations: 1.4.0
  - related_resources: 1.0.3
  - serverinfo: 1.15.0
  - settings: 1.7.0
  - sharebymail: 1.15.0
  - spreed: 15.0.2
  - support: 1.8.0
  - survey_client: 1.13.0
  - suspicious_login: 4.3.0
  - systemtags: 1.15.0
  - tasks: 0.14.5
  - text: 3.6.0
  - theming: 2.0.1
  - twofactor_admin: 4.0.0
  - twofactor_backupcodes: 1.14.0
  - twofactor_reminder: 1.0.0
  - twofactor_totp: 7.0.0
  - updatenotification: 1.15.0
  - user_ldap: 1.15.0
  - user_status: 1.5.0
  - viewer: 1.9.0
  - weather_status: 1.5.0
  - workflow_ocr: 1.25.2
  - workflowengine: 2.7.0
Disabled:
  - encryption
  - files_external

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

.

Additional info

No response

Start with lib/DocumentConverter.php line 125 and lib/Document/DocumentStore.php lines 255-256, following the conversion path from ConvertController.php line 60. Run cron.php to reproduce the segmentation fault and inspect the reported DocumentConversionException. Done means the recurring conversion failure is understood and cron no longer produces the error.