runtime: Violation of nullability constraint for certificate validation during TLS renegotiation in HTTP request

Description

When TLS is renegotiated in the middle of HTTP request the validation callback receives null for HttpRequestMessage which violates the nullability annotations of the callback.

Configuration

.NET 5.0.7 Windows 11 build 22000.51 (triggers the re-negotiation scenario) x64

Regression?

The error doesn’t happen on Windows 10 for the same request. That suggests it’s triggered by something in the TLS stack that changed in Windows 11.

Other information

Stack trace:

>	MailClient.dll!MailClient.Protocols.InteractionController.HttpClientCerificationValidationMessageHandler.ValidateCertificate(System.Net.Http.HttpRequestMessage message, System.Security.Cryptography.X509Certificates.X509Certificate2 certificate, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors) Line 498	C#
 	System.Net.Http.dll!System.Net.Http.ConnectHelper.EstablishSslConnectionAsync.AnonymousMethod__0(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certificate, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors)	Unknown
 	System.Net.Security.dll!System.Net.Security.SecureChannel.VerifyRemoteCertificate(System.Net.Security.RemoteCertificateValidationCallback remoteCertValidationCallback, ref System.Net.Security.ProtocolToken alertToken, out System.Net.Security.SslPolicyErrors sslPolicyErrors, out System.Security.Cryptography.X509Certificates.X509ChainStatusFlags chainStatus)	Unknown
 	System.Net.Security.dll!System.Net.Security.SslStream.CompleteHandshake(ref System.Net.Security.ProtocolToken alertToken, out System.Net.Security.SslPolicyErrors sslPolicyErrors, out System.Security.Cryptography.X509Certificates.X509ChainStatusFlags chainStatus)	Unknown
 	System.Net.Security.dll!System.Net.Security.SslStream.ForceAuthenticationAsync<System.Net.Security.AsyncReadWriteAdapter>(System.Net.Security.AsyncReadWriteAdapter adapter, bool receiveFirst, byte[] reAuthenticationData, bool isApm)	Unknown
 	System.Net.Security.dll!System.Net.Security.SslStream.ReplyOnReAuthenticationAsync<System.Net.Security.AsyncReadWriteAdapter>(System.Net.Security.AsyncReadWriteAdapter adapter, byte[] buffer)	Unknown
 	System.Net.Security.dll!System.Net.Security.SslStream.ReadAsyncInternal<System.Net.Security.AsyncReadWriteAdapter>(System.Net.Security.AsyncReadWriteAdapter adapter, System.Memory<byte> buffer)	Unknown
 	System.Net.Security.dll!System.Net.Security.SslStream.ReadAsync(System.Memory<byte> buffer, System.Threading.CancellationToken cancellationToken)	Unknown
 	System.Net.Http.dll!System.Net.Http.HttpConnection.FillAsync(bool async)	Unknown
 	System.Net.Http.dll!System.Net.Http.HttpConnection.ReadNextResponseHeaderLineAsync(bool async, bool foldedHeadersAllowed)	Unknown
 	System.Net.Http.dll!System.Net.Http.HttpConnection.SendAsyncCore(System.Net.Http.HttpRequestMessage request, bool async, System.Threading.CancellationToken cancellationToken)	Unknown
 	[Resuming Async Method]	
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Net.Http.HttpResponseMessage>.AsyncStateMachineBox<System.Net.Http.HttpConnection.<SendAsyncCore>d__56>.ExecutionContextCallback(object s)	Unknown
 	System.Private.CoreLib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state)	Unknown
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Net.Http.HttpResponseMessage>.AsyncStateMachineBox<System.Net.Http.HttpConnection.<SendAsyncCore>d__56>.MoveNext(System.Threading.Thread threadPoolThread)	Unknown
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.__Canon>.AsyncStateMachineBox<System.Net.Http.HttpConnection.<SendAsyncCore>d__56>.MoveNext()	Unknown
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__12_0(System.Action innerContinuation, System.Threading.Tasks.Task innerTask)	Unknown
 	System.Private.CoreLib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()	Unknown
 	System.Private.CoreLib.dll!System.Threading.Tasks.AwaitTaskContinuation.System.Threading.IThreadPoolWorkItem.Execute()	Unknown
 	System.Private.CoreLib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch()	Unknown
 	System.Private.CoreLib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()	Unknown
 	[Async Call Stack]	
 	[Async] System.Net.Http.dll!System.Net.Http.AuthenticationHelper.SendWithNtAuthAsync(System.Net.Http.HttpRequestMessage request, System.Uri authUri, bool async, System.Net.ICredentials credentials, bool isProxyAuth, System.Net.Http.HttpConnection connection, System.Net.Http.HttpConnectionPool connectionPool, System.Threading.CancellationToken cancellationToken)	Unknown
 	[Async] System.Net.Http.dll!System.Net.Http.HttpConnectionPool.SendWithRetryAsync(System.Net.Http.HttpRequestMessage request, bool async, bool doRequestAuth, System.Threading.CancellationToken cancellationToken)	Unknown
 	[Async] System.Net.Http.dll!System.Net.Http.AuthenticationHelper.SendWithAuthAsync(System.Net.Http.HttpRequestMessage request, System.Uri authUri, bool async, System.Net.ICredentials credentials, bool preAuthenticate, bool isProxyAuth, bool doRequestAuth, System.Net.Http.HttpConnectionPool pool, System.Threading.CancellationToken cancellationToken)	Unknown
 	[Async] System.Net.Http.dll!System.Net.Http.RedirectHandler.SendAsync(System.Net.Http.HttpRequestMessage request, bool async, System.Threading.CancellationToken cancellationToken)	Unknown
 	[Async] System.Net.Http.dll!System.Net.Http.DecompressionHandler.SendAsync(System.Net.Http.HttpRequestMessage request, bool async, System.Threading.CancellationToken cancellationToken)	Unknown
 	[Async] MailClient.dll!MailClient.Protocols.InteractionController.HttpClientCerificationValidationMessageHandler.SendAsync(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) Line 515	C#