From 5e20b0a4522d8d2753ae3991a7aa9f11f1f6cc95 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 17 Nov 2017 19:24:06 +0100
Subject: [PATCH] cgroup: properly determine cgroups zombie processes belong to

When a process becomes a zombie its cgroup might be deleted. Let's add
some minimal code to detect cases like this, so that we can still
attribute this back to the original cgroup.
---
 src/basic/cgroup-util.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index a7964fb5a9..ae8f2d1160 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -1104,6 +1104,11 @@ int cg_pid_get_path(const char *controller, pid_t pid, char **path) {
                 if (!p)
                         return -ENOMEM;
 
+                /* Truncate suffix indicating the process is a zombie */
+                e = endswith(p, " (deleted)");
+                if (e)
+                        *e = 0;
+
                 *path = p;
                 return 0;
         }