From: ven <2988994+hexiaowen@users.noreply.github.com>
Date: Wed, 22 May 2019 06:24:28 +0000 (+0800)
Subject: bus_open leak sd_event_source when udevadm trigger。
X-Git-Tag: v243-rc1~396
X-Git-Url: http://git-history.diyao.me/?a=commitdiff_plain;h=b2774a3ae692113e1f47a336a6c09bac9cfb49ad;p=systemd%2F.git

bus_open leak sd_event_source when udevadm trigger。

On my host, when executing the udevadm trigger, I only receive the change event, which causes memleak
---

diff --git a/src/login/logind-button.c b/src/login/logind-button.c
index daffbf0668..1624a31cc3 100644
--- a/src/login/logind-button.c
+++ b/src/login/logind-button.c
@@ -341,7 +341,8 @@ int button_open(Button *b) {
         }
 
         (void) button_set_mask(b);
-
+        
+        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");