From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 8 May 2022 15:56:05 +0000 (+0900)
Subject: core/unit: fix use-after-free
X-Git-Tag: v251-rc3~40
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=734582830b58e000a26e18807ea277c18778573c;p=thirdparty%2Fsystemd.git

core/unit: fix use-after-free

Fixes #23312.
---

diff --git a/src/core/unit.c b/src/core/unit.c
index 42ee8892a4f..fcfc9bc8d2b 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -684,8 +684,8 @@ Unit* unit_free(Unit *u) {
 
         unit_dequeue_rewatch_pids(u);
 
-        sd_bus_slot_unref(u->match_bus_slot);
-        sd_bus_track_unref(u->bus_track);
+        u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot);
+        u->bus_track = sd_bus_track_unref(u->bus_track);
         u->deserialized_refs = strv_free(u->deserialized_refs);
         u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message);