[Bug]: No files here showing when a folder can't be read on external storage

[oculos]

⚠️ 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 OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

If a user mounts an external storage folder (folder A), and this folder contains another folder (folder B) that the user who mounted doesn't have permissions to read, no content at all is shown on the browser when accessing folder A.
The content is synced as it should, and visible on the Desktop client.

Steps to reproduce

1. Create a smb share and add a folder on it that the user can't access
2. Mount it via external extorage
3. No content of the share folder is visible.

Expected behavior

The content that is accessible to the user should be visible on the browser. Only the content he doesn't have access should be hidden.

Installation method

Community Docker image

Nextcloud Server version

29

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Nginx

Database engine version

MariaDB

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

Upgraded to a MAJOR version (ex. 28 to 29)

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

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

Configuration report

{
    "system": {
        "debug": false,
        "allow_local_remote_servers": true,
        "app.mail.imap.timeout": 20,
        "app.mail.smtp.timeout": 20,
        "app.mail.sieve.timeout": 20,
        "app.mail.verify-tls-peer": false,
        "apps_paths": [
            {
                "path": "\/var\/www\/nextcloud\/apps",
                "url": "\/apps",
                "writable": true
            },
            {
                "path": "\/var\/www\/nextcloud\/apps-pkg",
                "url": "\/apps-pkg",
                "writable": false
            }
        ],
        "enable_previews": true,
        "defaultapp": "files,dashboard",
        "logfile": "\/var\/log\/nextcloud\/nextcloud.log",
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": {
            "0": "10.100.30.86",
            "1": "cloud.francisaugusto.com",
            "3": "cloud.med-lo.eu"
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "29.0.4.1",
        "overwrite.cli.url": "https:\/\/cloud.francisaugusto.com",
        "overwriteprotocol": "https",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_smtpsecure": "tls",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauthtype": "LOGIN",
        "ldapIgnoreNamingRules": false,
        "maintenance": false,
        "theme": "",
        "loglevel": 1,
        "mysql.utf8mb4": true,
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [
            "admin"
        ],
        "twofactor_enforced_excluded_groups": [],
        "onlyoffice": {
            "verify_peer_off": true
        },
        "app_install_overwrite": [
            "joplin",
            "nextbackup",
            "onlyoffice",
            "maps",
            "ransomware_protection",
            "mail_roundcube",
            "mailnotifier"
        ],
        "maintenance_window_start": 1,
        "mail_sendmailmode": "smtp",
        "updater.release.channel": "stable",
        "default_phone_region": "NO",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.locking": "\\OC\\Memcache\\APCu",
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "enabledPreviewProviders": [
            "OC\\Preview\\PNG",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\OpenDocument",
            "OC\\Preview\\Krita",
            "OC\\Preview\\HEIC"
        ]
    }
}

List of activated Apps

Enabled:
  - activity: 2.21.1
  - admin_audit: 1.19.0
  - assistant: 1.1.0
  - calendar: 4.7.15
  - calendar_resource_management: 0.8.0
  - circles: 29.0.0-dev
  - cloud_federation_api: 1.12.0
  - collectives: 2.13.0
  - comments: 1.19.0
  - contacts: 6.0.0
  - contactsinteraction: 1.10.0
  - cospend: 1.6.1
  - dashboard: 7.9.0
  - dav: 1.30.1
  - deck: 1.13.1
  - federatedfilesharing: 1.19.0
  - federation: 1.19.0
  - files: 2.1.0
  - files_accesscontrol: 1.19.1
  - files_automatedtagging: 1.19.0
  - files_downloadlimit: 2.0.0
  - files_external: 1.21.0
  - files_pdfviewer: 2.10.0
  - files_reminders: 1.2.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - files_versions: 1.22.0
  - firstrunwizard: 2.18.0
  - flow_notifications: 1.9.0
  - forms: 4.2.4
  - gpxpod: 5.0.18
  - groupfolders: 17.0.1
  - integration_mastodon: 2.0.6
  - integration_mattermost: 1.1.1
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - mail: 3.7.7
  - mailnotifier: 0.0.3
  - nextcloud_announcements: 1.18.0
  - notes: 4.10.1
  - notifications: 2.17.0
  - oauth2: 1.17.0
  - password_policy: 1.19.0
  - photos: 2.5.0
  - previewgenerator: 5.6.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - recommendations: 2.1.0
  - related_resources: 1.4.0
  - richdocuments: 8.4.4
  - serverinfo: 1.19.0
  - settings: 1.12.0
  - sharebymail: 1.19.0
  - spreed: 19.0.7
  - support: 1.12.0
  - survey_client: 1.17.0
  - systemtags: 1.19.0
  - tables: 0.7.5
  - text: 3.10.1
  - theming: 2.4.0
  - twofactor_backupcodes: 1.18.0
  - twofactor_totp: 11.0.0-dev
  - updatenotification: 1.19.1
  - user_ldap: 1.20.0
  - user_oidc: 6.0.1
  - user_saml: 6.2.0
  - user_status: 1.9.0
  - viewer: 2.3.0
  - weather_status: 1.9.0
  - workflowengine: 2.11.0
Disabled:
  - accessibility: 1.9.0
  - bruteforcesettings: 2.9.0
  - camerarawpreviews: 0.8.5 (installed 0.8.5)
  - customproperties: 2.0.4 (installed 2.0.4)
  - encryption: 2.17.0
  - event_update_notification: 2.4.0 (installed 2.4.0)
  - external: 5.4.0 (installed 5.4.0)
  - files_markdown: 2.4.1 (installed 2.4.1)
  - files_rightclick: 1.2.0 (installed 1.6.0)
  - files_texteditor: 2.15.1 (installed 2.15.1)
  - files_videoplayer: 1.12.0
  - integration_reddit: 2.0.3 (installed 2.0.3)
  - joplin: 0.0.25 (installed 0.0.25)
  - mail_roundcube: 1.1.1 (installed 1.1.1)
  - maps: 1.4.0 (installed 1.4.0)
  - metadata: 0.20.0 (installed 0.20.0)
  - news: 25.0.0-alpha5 (installed 25.0.0-alpha5)
  - nextbackup: 21.1.0 (installed 21.1.0)
  - ocr: 6.0.58 (installed 6.0.58)
  - oidc_login: 3.1.1 (installed 3.1.1)
  - onlyoffice: 9.3.0 (installed 9.3.0)
  - quicknotes: 0.8.23 (installed 0.8.23)
  - ransomware_protection: 1.14.0 (installed 1.14.0)
  - scanner: 0.2.3 (installed 0.2.3)
  - sensorlogger: 0.1.4 (installed 0.1.4)
  - suspicious_login: 7.0.0
  - tasks: 0.16.0 (installed 0.16.0)
  - video_converter: 1.0.6 (installed 1.0.6)
  - workflow_script: 1.14.1 (installed 1.14.1)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

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request for /gaelle/Readme.md (ForbiddenException)","exception":{},"CustomMessage":"Invalid request for /gaelle/Readme.md (ForbiddenException)"}}

### Additional info

_No response_

I do have the same problem. I was able to solve it by giving the user more rights on the external storage but now he is able to see folders which he shouldn't see. Is there a timespan when this gets solved?

[petrcech]

I solved it by commenting out exception in lib/private/Files/Storage/Common.php on line 844 in 30.0.1(throw new StorageNotAvailableException('Directory listing failed')) and adding return. Should probably remove the dir from further scanning.

That should skip unreadable directories and continue with the scan.

I get some spam in logs because of the unreadable dirs, but the readable are there.
Failed to open directory: Permission denied at /home/cech/build/NEXTCLOUD/nextcloud-30/lib/private/Files/Storage/Local.php#129"

[joshtrichards]

"Invalid request for /gaelle/Readme.md (ForbiddenException)",

The inability to access may be fixed as of v29.0.5, though your particular situation suggests we may need to expand the coverage of #6155 a bit more.

If it continues to generate a ForbiddenException in newer v29 releases, can you try adding ForbiddenException to the following list:

text/lib/DAV/WorkspacePlugin.php

Line 131 in b5c8c81

} catch (GenericFileException|NotPermittedException|LockedException) {

...to see if the problem goes away?