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From f307c633acd12d59800a760b1c45fad8c79b6f49 Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Mon, 9 May 2022 00:56:05 +0900
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Subject: [PATCH] core/unit: fix use-after-free
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Fixes #23312.
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(cherry picked from commit 734582830b58e000a26e18807ea277c18778573c)
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Related: #2047373
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---
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 src/core/unit.c | 4 ++--
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 1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/src/core/unit.c b/src/core/unit.c
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index bd79578255..68affa2c0e 100644
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--- a/src/core/unit.c
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+++ b/src/core/unit.c
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@@ -580,8 +580,8 @@ void unit_free(Unit *u) {
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         unit_dequeue_rewatch_pids(u);
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-        sd_bus_slot_unref(u->match_bus_slot);
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-        sd_bus_track_unref(u->bus_track);
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+        u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot);
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+        u->bus_track = sd_bus_track_unref(u->bus_track);
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         u->deserialized_refs = strv_free(u->deserialized_refs);
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         u->pending_freezer_message = sd_bus_message_unref(u->pending_freezer_message);
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