From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Thu, 4 Sep 2025 09:49:21 +0000 (+0900)
Subject: core/varlink: do not send unrealized cgroups to oomd
X-Git-Tag: v258-rc4~12^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f36f3744474d701fd8f215c010782f68bf4d4624;p=thirdparty%2Fsystemd.git

core/varlink: do not send unrealized cgroups to oomd

Follow-ups for 23ac08115af83e3a0a937fa207fc52511aba2ffa.

Since the commit, the cgroup path is set only when it is realized.

Fixes the following varlink IDL validation failure:
```
systemd-oomd[1687]: Varlink-IDL: Mandatory field 'path' is null or missing on object, refusing.
```
---

diff --git a/src/core/varlink.c b/src/core/varlink.c
index 8c6b95e31d1..22312a11f76 100644
--- a/src/core/varlink.c
+++ b/src/core/varlink.c
@@ -95,6 +95,10 @@ static int build_managed_oom_cgroups_json(Manager *m, sd_json_variant **ret) {
                         if (!c)
                                 continue;
 
+                        CGroupRuntime *crt = unit_get_cgroup_runtime(u);
+                        if (!crt || !crt->cgroup_path)
+                                continue;
+
                         FOREACH_ELEMENT(i, managed_oom_mode_properties) {
                                 _cleanup_(sd_json_variant_unrefp) sd_json_variant *e = NULL;