From b58cc8a7ee9fab3fd407fcdf477a52b8a3496062 Mon Sep 17 00:00:00 2001
From: Ingo Oppermann <ingo@datarhei.com>
Date: Mon, 24 Apr 2023 16:09:01 +0200
Subject: [PATCH] Fix race condition

---
 process/process.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/process/process.go b/process/process.go
index 4bfcb4b4..d1754822 100644
--- a/process/process.go
+++ b/process/process.go
@@ -593,6 +593,10 @@ func (p *process) stop(wait bool) error {
 		if p.callbacks.onExit == nil {
 			p.callbacks.onExit = func() {
 				wg.Done()
+
+				p.callbacks.lock.Lock()
+				defer p.callbacks.lock.Unlock()
+
 				p.callbacks.onExit = nil
 			}
 		} else {
@@ -600,6 +604,10 @@ func (p *process) stop(wait bool) error {
 			p.callbacks.onExit = func() {
 				cb()
 				wg.Done()
+
+				p.callbacks.lock.Lock()
+				defer p.callbacks.lock.Unlock()
+
 				p.callbacks.onExit = cb
 			}
 		}