From cde88c4ea364e816619f385a870d074ebc12fe0f Mon Sep 17 00:00:00 2001
From: Luca Boccassi <luca.boccassi@gmail.com>
Date: Wed, 3 Jun 2026 16:47:54 +0100
Subject: [PATCH] oomd: reject invalid arguments early

Validate input parameter immediately during initial parsing

Follow-up for 9de5e32136949a531e71cb31170025c2e1d3430e
---
 src/oom/oomd-manager.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/oom/oomd-manager.c b/src/oom/oomd-manager.c
index 7ec6684f6e..2fafa6904d 100644
--- a/src/oom/oomd-manager.c
+++ b/src/oom/oomd-manager.c
@@ -88,6 +88,11 @@ static int process_managed_oom_message(Manager *m, uid_t uid, sd_json_variant *p
                 if (r < 0)
                         continue;
 
+                if (!path_is_normalized(empty_to_root(message.path))) {
+                        log_debug("Received non-normalized cgroup path '%s', ignoring.", message.path);
+                        continue;
+                }
+
                 if (uid != 0) {
                         uid_t cg_uid;