From 0282c0285a3e3c2e409305ce28555a6ad0489539 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 23 Apr 2020 16:25:53 +0200
Subject: [PATCH] shutdown: unregister all binfmt_misc entries before entering
 shutdown loop

Apparently if the new "F" flag is used they might pin files, which
blocks us from unmounting things. Let's hence clear this up explicitly.
Before entering our umount loop.

Fixes: #14981
---
 src/shutdown/shutdown.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/shutdown/shutdown.c b/src/shutdown/shutdown.c
index f2ad23d055..be8ae75e04 100644
--- a/src/shutdown/shutdown.c
+++ b/src/shutdown/shutdown.c
@@ -16,6 +16,7 @@
 
 #include "alloc-util.h"
 #include "async.h"
+#include "binfmt-util.h"
 #include "cgroup-setup.h"
 #include "cgroup-util.h"
 #include "def.h"
@@ -386,6 +387,7 @@ int main(int argc, char *argv[]) {
                 sync_with_progress();
 
         disable_coredumps();
+        disable_binfmt();
 
         log_info("Sending SIGTERM to remaining processes...");
         broadcast_signal(SIGTERM, true, true, arg_timeout);