From d8f2e9ae3b47b27e51680d88b774183cd156b073 Mon Sep 17 00:00:00 2001
From: Sergey Tsypanov <stsypanov@openjdk.org>
Date: Mon, 24 Jul 2023 16:24:40 +0000
Subject: [PATCH] 8310530: PipedOutputStream.flush() accesses sink racily

Reviewed-by: dfuchs, bpb, liach, rriggs
---
 src/java.base/share/classes/java/io/PipedOutputStream.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/java.base/share/classes/java/io/PipedOutputStream.java b/src/java.base/share/classes/java/io/PipedOutputStream.java
index 525a4c73996..8e7bf124272 100644
--- a/src/java.base/share/classes/java/io/PipedOutputStream.java
+++ b/src/java.base/share/classes/java/io/PipedOutputStream.java
@@ -163,6 +163,7 @@ public class PipedOutputStream extends OutputStream {
      */
     @Override
     public synchronized void flush() throws IOException {
+        var sink = this.sink;
         if (sink != null) {
             synchronized (sink) {
                 sink.notifyAll();