From 20d684011c93bed4b45c736ac1f9104983a090dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Wed, 14 Feb 2018 00:01:05 +0100
Subject: [PATCH] pid1: free basic unit information at the very end, before
 freeing the unit

We would free stuff like the names of the unit first, and then recurse
into other structures to remove the unit from there. Technically this
was OK, since the code did not access the name, but this makes debugging
harder. And if any log messages are added in any of those functions, they
are likely to access u->id and such other basic information about the unit.
So let's move the removal of this "basic" information towards the end
of unit_free().

(cherry picked from commit a946fa9bb968ac197d7a99970e27388b751dca94)
(cherry picked from commit 42a93a826cd726d1e4d3ea2c8cb347cec2f0dabe)

Related: #1729228
---
 src/core/unit.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/core/unit.c b/src/core/unit.c
index 2204be26d2..63f00acc0a 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -537,6 +537,15 @@ void unit_free(Unit *u) {
         set_remove(u->manager->failed_units, u);
         set_remove(u->manager->startup_units, u);
 
+        unit_unwatch_all_pids(u);
+
+        unit_ref_unset(&u->slice);
+        while (u->refs_by_target)
+                unit_ref_unset(u->refs_by_target);
+
+        condition_free_list(u->conditions);
+        condition_free_list(u->asserts);
+
         free(u->description);
         strv_free(u->documentation);
         free(u->fragment_path);
@@ -548,15 +557,6 @@ void unit_free(Unit *u) {
 
         set_free_free(u->names);
 
-        unit_unwatch_all_pids(u);
-
-        condition_free_list(u->conditions);
-        condition_free_list(u->asserts);
-
-        unit_ref_unset(&u->slice);
-        while (u->refs_by_target)
-                unit_ref_unset(u->refs_by_target);
-
         free(u);
 }