From fe69e1ef6b1a9753b2cd6c89cddf6565fa3ac776 Mon Sep 17 00:00:00 2001
From: Anna Henningsen <anna@addaleax.net>
Date: Tue, 21 Jul 2020 13:27:07 +0200
Subject: [PATCH] src: guard against nullptr deref in TimerWrapHandle::Stop

Refs: https://github.com/nodejs/node/pull/34454

PR-URL: https://github.com/nodejs/node/pull/34460
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
---
 src/timer_wrap.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/timer_wrap.cc b/src/timer_wrap.cc
index 4b6350c4cb33b5..6660b8c958810c 100644
--- a/src/timer_wrap.cc
+++ b/src/timer_wrap.cc
@@ -56,7 +56,8 @@ TimerWrapHandle::TimerWrapHandle(
 }
 
 void TimerWrapHandle::Stop() {
-  return timer_->Stop();
+  if (timer_ != nullptr)
+    return timer_->Stop();
 }
 
 void TimerWrapHandle::Close() {