From: Mike Yuan <me@yhndnzj.com>
Date: Thu, 26 Feb 2026 10:06:34 +0000 (+0100)
Subject: core: validate input cgroup path more prudently
X-Git-Tag: v257.11~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54588d2dedff54bfb6036670820650e4ea74628f;p=thirdparty%2Fsystemd.git

core: validate input cgroup path more prudently

(cherry picked from commit efa6ba2ab625aaa160ac435a09e6482fc63bdbe8)
(cherry picked from commit 3cee294fe8cf4fa0eff933ab21416d099942cabd)
(cherry picked from commit 1d22f706bd04f45f8422e17fbde3f56ece17758a)
---

diff --git a/src/core/dbus-manager.c b/src/core/dbus-manager.c
index 54379878031..ca7179ad4d3 100644
--- a/src/core/dbus-manager.c
+++ b/src/core/dbus-manager.c
@@ -621,6 +621,12 @@ static int method_get_unit_by_control_group(sd_bus_message *message, void *userd
         if (r < 0)
                 return r;
 
+        if (!path_is_absolute(cgroup))
+                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not absolute: %s", cgroup);
+
+        if (!path_is_normalized(cgroup))
+                return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Control group path is not normalized: %s", cgroup);
+
         u = manager_get_unit_by_cgroup(m, cgroup);
         if (!u)
                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT,