From 6b076a27437a94f0c0e4d506188bef26c53896ee Mon Sep 17 00:00:00 2001
From: "Dustin J. Mitchell" <dustin@v.igoro.us>
Date: Tue, 27 Jun 2023 04:19:03 -0400
Subject: [PATCH] fs: wait for in-flight ops before cloning `File` (#5803)

If there is an ongoing operation on a file, wait for that to complete
before performing the clone in `File::try_clone`. This avoids a race
between the ongoing operation and any subsequent operations performed on
the clone.

Fixes: #5759
---
 tokio/src/fs/file.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tokio/src/fs/file.rs b/tokio/src/fs/file.rs
index f4634d9ebb8..74f91958d0d 100644
--- a/tokio/src/fs/file.rs
+++ b/tokio/src/fs/file.rs
@@ -399,6 +399,7 @@ impl File {
     /// # }
     /// ```
     pub async fn try_clone(&self) -> io::Result<File> {
+        self.inner.lock().await.complete_inflight().await;
         let std = self.std.clone();
         let std_file = asyncify(move || std.try_clone()).await?;
         Ok(File::from_std(std_file))