Open AlphaCharry opened 6 months ago
This exception is System.ObjectDisposedException, which usually occurs when trying to access an object that has already been disposed. In this case, the exception occurs in the System.Threading.Mutex.ReleaseMutex() method, which means you may be trying to release a mutex that has already been released. In the code you provided, _singleWriteMutex.ReleaseMutex() is called in the finally block, which means it will be executed whether or not the code in the try block throws an exception. If _singleWriteMutex is released before the finally block is executed, then when the finally block tries to release it, it will throw an ObjectDisposedException. To solve this problem, you need to ensure that _singleWriteMutex is not released before the finally block is executed. You can do this by checking if _singleWriteMutex is null or has already been released. Here is a possible solution:
try
{
_singleWriteMutex.WaitOne();
using (PayloadWriter pw = new PayloadWriter(_stream, true))
{
OnClientWrite(message, pw.WriteMessage(message));
}
}
catch (Exception)
{
Disconnect();
SendCleanup(true);
}
finally
{
if (_singleWriteMutex != null && _singleWriteMutex.SafeWaitHandle.IsClosed == false)
{
_singleWriteMutex.ReleaseMutex();
}
}
Can you create a PR with the fix?
您可以使用修复程序创建 PR 吗?
What's PR?
Quasar version
1.4.0
Server installed .NET version
.NET 4.5.2
Server operating system
Windows 10/Server 2019/2016
Client installed .NET version
.NET 4.5.2
Client operating system
Windows 11/Server 2022
Build configuration
Debug
Describe the bug
Quasar.exe Framework V: v4.0.30319 Bug: "The process terminated due to an unhandled exception. Exception information:". System.ObjectDisposedException System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean ByRef) System.StubHelpers.StubHelpers.SafeHandleAddRef(System.Runtime.InteropServices.SafeHandle, Boolean ByRef) Microsoft.Win32.Win32Native.ReleaseMutex(Microsoft.Win32.SafeHandles.SafeWaitHandle) System.Threading.Mutex.ReleaseMutex() Quasar.Server.Networking.Client.SafeSendMessage(Quasar.Common.Messages.IMessage) Quasar.Server.Networking.Client.ProcessSendBuffers(System.Object) System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() System.Threading.ThreadPoolWorkQueue.Dispatch()
How to reproduce
C# Code
Open multiple remote control Shell, and when the client may be unstable, the client will return data, and an accident occurs at this time.
Expected behavior
private void SafeSendMessage(IMessage message) { if (_stream == null || !_stream.CanWrite) { return; }
}
Actual behavior
"It crashes directly, check the error in the Windows log
Additional context
private void SafeSendMessage(IMessage message) { if (_stream == null || !_stream.CanWrite) { return; }
} this ismy code fix