[Bug]: Serious memory leak in web log reader❗

[Gloryandel]

⚠️ 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

Just open the log reader and wait for a while. If the browser has memory usage exception monitoring, it will crash directly and prompt that the memory is exceeded.otherwise the page will freeze directly.Firefox and the Chromuim series of browsers behave the same.

Steps to reproduce

1. Just open the log reader and wait for a while.(path:/settings/admin/logging)

Expected behavior

null

Nextcloud Server version

30

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Nginx

Database engine version

PostgreSQL

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

None

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": {
"datadirectory": "REMOVED SENSITIVE VALUE",
"instanceid": "REMOVED SENSITIVE VALUE",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"192.168.10.10:8666"
],
"version": "30.0.1.2",
"overwrite.cli.url": "https://192.168.10.10:8666",
"dbtype": "pgsql",
"dbname": "REMOVED SENSITIVE VALUE",
"dbhost": "REMOVED SENSITIVE VALUE",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"installed": true,
"memcache.local": "\OC\Memcache\APCu",
"filelocking.enabled": true,
"memcache.locking": "\OC\Memcache\APCu",
"apc.shm_size": "256M",
"upgrade.disable-web": true,
"logfile": "/config/log/nextcloud.log",
"logfile_audit": "/config/log/audit.log",
"filesystem_check_changes": 1,
"default_language": "zh_CN",
"default_locale": "zh",
"default_phone_region": "CN",
"app_install_overwrite": [
"files_archive",
"extract",
"duplicatefinder"
],
"mail_from_address": "REMOVED SENSITIVE VALUE",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_domain": "REMOVED SENSITIVE VALUE",
"mail_smtphost": "REMOVED SENSITIVE VALUE",
"mail_smtpsecure": "ssl",
"mail_smtpport": "465",
"mail_smtpauth": 1,
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE",
"maintenance": false,
"loglevel": 2,
"maintenance_window_start": 1
}
}

List of activated Apps

Enabled:

• activity: 3.0.0
• app_api: 4.0.0
• bruteforcesettings: 3.0.0
• checksum: 1.2.5
• circles: 30.0.0-dev
• cloud_federation_api: 1.13.0
• comments: 1.20.1
• contactsinteraction: 1.11.0
• dashboard: 7.10.0
• dav: 1.31.1
• duplicatefinder: 1.2.6
• extract: 1.3.6
• federatedfilesharing: 1.20.0
• federation: 1.20.0
• files: 2.2.0
• files_archive: 1.2.3
• files_downloadlimit: 3.0.0
• files_external: 1.22.0
• files_pdfviewer: 3.0.0
• files_reminders: 1.3.0
• files_sharing: 1.22.0
• files_trashbin: 1.20.1
• files_versions: 1.23.0
• firstrunwizard: 3.0.0
• logreader: 3.0.0
• lookup_server_connector: 1.18.0
• nextcloud_announcements: 2.0.0
• notifications: 3.0.0
• oauth2: 1.18.1
• password_policy: 2.0.0
• photos: 3.0.2
• privacy: 2.0.0
• provisioning_api: 1.20.0
• recommendations: 3.0.0
• related_resources: 1.5.0
• serverinfo: 2.0.0
• settings: 1.13.0
• sharebymail: 1.20.0
• support: 2.0.0
• survey_client: 2.0.0
• systemtags: 1.20.0
• text: 4.1.0
• theming: 2.5.0
• twofactor_backupcodes: 1.19.0
• updatenotification: 1.20.0
• user_status: 1.10.0
• viewer: 3.0.0
• weather_status: 1.10.0
• webhook_listeners: 1.1.0-dev
• workflowengine: 2.12.0
  Disabled:
• admin_audit: 1.20.0
• encryption: 2.18.0
• suspicious_login: 8.0.0
• twofactor_nextcloud_notification: 4.0.0
• twofactor_totp: 12.0.0-dev
• user_ldap: 1.21.0

Nextcloud Signing status

null

Nextcloud Logs

null

Additional info

Chrome/128.0.0.0

[joshtrichards]

Duplicate of #1262

(Presumably)

[Gloryandel]

Duplicate of #1262

(Presumably)

I redeployed a new Nextcloud and found that /apps/logreader/api/poll?lastReqId=xxx caused the massive amount of data returned when querying the log to occupy too much memory.