From dc3e079395816ce251c4794992f1816a61c1215d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Sekleta=CC=81r?= <msekleta@redhat.com>
Date: Thu, 9 Jul 2020 18:16:44 +0200
Subject: [PATCH 20/20] core: prevent excessive /proc/self/mountinfo parsing

(cherry picked from commit d586f642fd90e3bb378f7b6d3e3a64a753e51756)

Resolves: #1819868

[commit 51737206afaa10d902c86ec9b5ec97cf425039c2 from
https://github.com/systemd-rhel/rhel-8/]

Signed-off-by: Li Zhou <li.zhou@windriver.com>
---
 src/core/mount.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/core/mount.c b/src/core/mount.c
index c7aed23..48427b7 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -1861,6 +1861,12 @@ static void mount_enumerate(Manager *m)
                         goto fail;
                 }
 
+                r = sd_event_source_set_ratelimit(m->mount_event_source, 1 * USEC_PER_SEC, 5);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to enable rate limit for mount events: %m");
+                        goto fail;
+                }
+
                 (void) sd_event_source_set_description(m->mount_event_source, "mount-monitor-dispatch");
         }
 
-- 
2.17.1