From b88483b804e92a59800e8785c87d17a7213aafc4 Mon Sep 17 00:00:00 2001
From: ven <2988994+hexiaowen@users.noreply.github.com>
Date: Wed, 22 May 2019 14:24:28 +0800
Subject: [PATCH] =?UTF-8?q?bus=5Fopen=20leak=20sd=5Fevent=5Fsource=20when?=
 =?UTF-8?q?=20udevadm=20trigger=E3=80=82?=
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On my host, when executing the udevadm trigger, I only receive the change event, which causes memleak

(cherry picked from commit b2774a3ae692113e1f47a336a6c09bac9cfb49ad)

Resolves: #1798503
---
 src/login/logind-button.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/login/logind-button.c b/src/login/logind-button.c
index d7211e66ce..9145176e58 100644
--- a/src/login/logind-button.c
+++ b/src/login/logind-button.c
@@ -259,6 +259,7 @@ int button_open(Button *b) {
                 goto fail;
         }
 
+        b->io_event_source = sd_event_source_unref(b->io_event_source);
         r = sd_event_add_io(b->manager->event, &b->io_event_source, b->fd, EPOLLIN, button_dispatch, b);
         if (r < 0) {
                 log_error_errno(r, "Failed to add button event: %m");