From f1c64ff116deb4fe06eb4d46583adc0c803bfbd4 Mon Sep 17 00:00:00 2001
From: Vsevolod Tolstopyatov <qwwdfsad@gmail.com>
Date: Mon, 16 May 2022 12:23:44 +0300
Subject: [PATCH] Fix data-race in Mutex owner when mutex is locked/released
 inconsistently

Fixes #3250
---
 kotlinx-coroutines-core/common/src/sync/Mutex.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kotlinx-coroutines-core/common/src/sync/Mutex.kt b/kotlinx-coroutines-core/common/src/sync/Mutex.kt
index d2a2fcd41b..681d5db6b0 100644
--- a/kotlinx-coroutines-core/common/src/sync/Mutex.kt
+++ b/kotlinx-coroutines-core/common/src/sync/Mutex.kt
@@ -361,7 +361,7 @@ internal class MutexImpl(locked: Boolean) : Mutex, SelectClause2<Any?, Mutex> {
     }
 
     private class LockedQueue(
-        @JvmField var owner: Any
+        @Volatile @JvmField var owner: Any
     ) : LockFreeLinkedListHead() {
         override fun toString(): String = "LockedQueue[$owner]"
     }