From d72d3891bf262b28cd4d03fd72e88bf37fef112a Mon Sep 17 00:00:00 2001
From: Maria Matejka <mq@ucw.cz>
Date: Tue, 30 Jul 2019 12:11:12 +0200
Subject: [PATCH] Log: Fixed race condition in reconfigure while BFD is running

---
 sysdep/unix/log.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sysdep/unix/log.c b/sysdep/unix/log.c
index 22291dc1..034861f8 100644
--- a/sysdep/unix/log.c
+++ b/sysdep/unix/log.c
@@ -294,12 +294,14 @@ log_switch(int debug, list *l, char *new_syslog_name)
   if (!l || EMPTY_LIST(*l))
     l = default_log_list(debug, !l, &new_syslog_name);
 
+  log_lock();
+
   current_log_list = l;
 
 #ifdef HAVE_SYSLOG_H
   if (current_syslog_name && new_syslog_name &&
       !strcmp(current_syslog_name, new_syslog_name))
-    return;
+    goto done;
 
   if (current_syslog_name)
   {
@@ -314,6 +316,9 @@ log_switch(int debug, list *l, char *new_syslog_name)
     openlog(current_syslog_name, LOG_CONS | LOG_NDELAY, LOG_DAEMON);
   }
 #endif
+
+done:
+  log_unlock();
 }