From feeb380b0954f8052664429dfc3b26fcbfc5c9f0 Mon Sep 17 00:00:00 2001
From: shapled <49967374+shapled@users.noreply.github.com>
Date: Fri, 2 Jun 2023 15:27:42 +0800
Subject: [PATCH] Update server_audit.cc

Fix the crash issue caused by the plugin being stopped after switching from a read lock to a write lock.
---
 plugin/server_audit/server_audit.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugin/server_audit/server_audit.cc b/plugin/server_audit/server_audit.cc
index bdb2b0ca1f9..fdbbb8be623 100644
--- a/plugin/server_audit/server_audit.cc
+++ b/plugin/server_audit/server_audit.cc
@@ -1196,7 +1196,8 @@ static int write_log(const char *message, size_t len, int take_lock)
         mysql_prlock_wrlock(&lock_operations);
         allow_rotate= 1;
       }
-      if (!(is_active= (logger_write_r(logfile, allow_rotate, message, len) ==
+      if (logfile &&
+	  !(is_active= (logger_write_r(logfile, allow_rotate, message, len) ==
                         (int) len)))
       {
         ++log_write_failures;