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fix(left4me): bind /var/lib/left4me/workshop_cache into server unit

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Same class of leak as the .steam bind: workshop VPKs in overlays are
symlinks pointing to /var/lib/left4me/workshop_cache/<id>.vpk. With
TemporaryFileSystem=/var/lib in HARDENING_SERVER and workshop_cache
not in BindReadOnlyPaths, the targets are invisible inside the unit's
mount namespace. Source silently fails to load the addons — no log
message, the addon just doesn't appear in-game (saw the ions vocalizer
workshop VPK dangling on server@2).

Add workshop_cache to the bind list. Read-only is fine; srcds reads
the VPKs, doesn't write them (web app populates the cache as left4me).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
CroneKorkN 2026-05-15 17:11:17 +02:00
parent 9a4e184378
commit f3fe49c60e
Signed by: cronekorkn
SSH key fingerprint: SHA256:v0410ZKfuO1QHdgKBsdQNF64xmTxOF8osF1LIqwTcVw
1 changed files with 4 additions and 0 deletions
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4
bundles/left4me/metadata.py
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@ -190,6 +190,10 @@ HARDENING_SERVER = {
'BindReadOnlyPaths': (
'/var/lib/left4me/installation',
'/var/lib/left4me/overlays',
# Workshop VPKs in overlays are symlinks into workshop_cache;
# without this bind they dangle inside the unit and Source
# silently fails to load the addons.
'/var/lib/left4me/workshop_cache',
# Steam SDK: srcds dlopen's ~/.steam/sdk32/steamclient.so for
# Steam master-server registration. Without this, SteamAPI_Init
# fails and the server falls back to LAN-only mode regardless