From ffb5635c1a34d23d85e3cb42310e14a81fa24f6e Mon Sep 17 00:00:00 2001
From: Allan Sandfeld Jensen <allan.jensen@qt.io>
Date: Thu, 22 Apr 2021 13:47:21 +0200
Subject: [PATCH] Do not access internal allThreads data unlocked

Pick-to: 6.1 6.0 5.15
Change-Id: I54eb67571fff07ffdbf9d2b77c96bb85e3fae5e0
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/thread/qthreadpool.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/corelib/thread/qthreadpool.cpp b/src/corelib/thread/qthreadpool.cpp
index b3e429e25c7..9a4e40ee162 100644
--- a/src/corelib/thread/qthreadpool.cpp
+++ b/src/corelib/thread/qthreadpool.cpp
@@ -788,6 +788,7 @@ bool QThreadPool::contains(const QThread *thread) const
     const QThreadPoolThread *poolThread = qobject_cast<const QThreadPoolThread *>(thread);
     if (!poolThread)
         return false;
+    QMutexLocker locker(&d->mutex);
     return d->allThreads.contains(const_cast<QThreadPoolThread *>(poolThread));
 }