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markus23

Member

Registered: 2025-08-21

Posts: 18  

elogind leaks session cgroups

Server: Devuan 6 excalibur in a VM

Problem: elogind (sysvinit hosts) creates one cgroup per login session at /sys/fs/cgroup/<session-id> and never removes it. On one server a CheckMK's per-minute SSH logins leaked 65533 of them, which exhausted the kernel's memory cgroup IDs and made every docker build/docker run fail with device or resource busy.

Workaround: hourly cron job that does cleanup

Is this a known problem? Is there a better solution?

markus23

Member

Registered: 2025-08-21

Posts: 18  

Re: elogind leaks session cgroups

Upstream bug might be https://github.com/elogind/elogind/issues/381