From c31f9cf23a7335b04ee98cd3671d12bf5834e02a Mon Sep 17 00:00:00 2001
From: Delweng <delweng@gmail.com>
Date: Wed, 23 Aug 2023 15:47:42 +0800
Subject: [PATCH] graphql: fix nil deref on a timer (#27978)

graphql: fix the panic of nil timer.Stop

Signed-off-by: jsvisa <delweng@gmail.com>
---
 graphql/service.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/graphql/service.go b/graphql/service.go
index 4ca427658a..f33e763058 100644
--- a/graphql/service.go
+++ b/graphql/service.go
@@ -88,7 +88,9 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	response := h.Schema.Exec(ctx, params.Query, params.OperationName, params.Variables)
-	timer.Stop()
+	if timer != nil {
+		timer.Stop()
+	}
 	responded.Do(func() {
 		responseJSON, err := json.Marshal(response)
 		if err != nil {