From 78116afa01a2a04d71adf9ebd9e92e2ca06d3f53 Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Fri, 15 Feb 2019 13:23:21 +0100
Subject: [PATCH] mdns: fix possible crash when mdns_free called while action
 queue not empty

---
 components/mdns/mdns.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/components/mdns/mdns.c b/components/mdns/mdns.c
index 1bce6db43..cf16ae656 100644
--- a/components/mdns/mdns.c
+++ b/components/mdns/mdns.c
@@ -4017,8 +4017,6 @@ static esp_err_t _mdns_service_task_stop()
     MDNS_SERVICE_LOCK();
     _mdns_stop_timer();
     MDNS_SERVICE_UNLOCK();
-    vSemaphoreDelete(_mdns_service_semaphore);
-    _mdns_service_semaphore = NULL;
     if (_mdns_service_task_handle) {
         mdns_action_t action;
         mdns_action_t * a = &action;
@@ -4031,6 +4029,8 @@ static esp_err_t _mdns_service_task_stop()
             vTaskDelay(10 / portTICK_PERIOD_MS);
         }
     }
+    vSemaphoreDelete(_mdns_service_semaphore);
+    _mdns_service_semaphore = NULL;
     return ESP_OK;
 }