From f7c26f991265323274381b030f136810cf162090 Mon Sep 17 00:00:00 2001
From: Ben Adams <thundercat@illyriad.co.uk>
Date: Sat, 17 Nov 2018 00:18:23 +0000
Subject: [PATCH] [2.2.1] Use non-pinnable buffer for zero byte read (#4066)

---
 .../Transport.Sockets/src/Internal/SocketReceiver.cs        | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Servers/Kestrel/Transport.Sockets/src/Internal/SocketReceiver.cs b/src/Servers/Kestrel/Transport.Sockets/src/Internal/SocketReceiver.cs
index 5d33f49829..3c3451cbcc 100644
--- a/src/Servers/Kestrel/Transport.Sockets/src/Internal/SocketReceiver.cs
+++ b/src/Servers/Kestrel/Transport.Sockets/src/Internal/SocketReceiver.cs
@@ -15,7 +15,13 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.Internal
 
         public SocketAwaitableEventArgs WaitForDataAsync()
         {
+#if NETCOREAPP2_1
+            _awaitableEventArgs.SetBuffer(Memory<byte>.Empty);
+#elif NETSTANDARD2_0
             _awaitableEventArgs.SetBuffer(Array.Empty<byte>(), 0, 0);
+#else
+#error TFMs need to be updated
+#endif
 
             if (!_socket.ReceiveAsync(_awaitableEventArgs))
             {