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Server, Client: Fix thread-safety violations related to NBTConnectionReceiveBuffer

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This commit is contained in:
Tal Aloni 2024-06-02 10:11:09 +03:00
parent 1a8c94ba94
commit ac403baf41
5 changed files with 180 additions and 165 deletions
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8
SMBLibrary/Client/SMB1Client.cs
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2014-2023 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
/* Copyright (C) 2014-2024 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
*
* You can redistribute this program and/or modify it under the terms of
* the GNU Lesser Public License as published by the Free Software Foundation,
@ -172,7 +172,10 @@ namespace SMBLibrary.Client
{
m_clientSocket.Disconnect(false);
m_clientSocket.Close();
lock (m_connectionState.ReceiveBuffer)
{
m_connectionState.ReceiveBuffer.Dispose();
}
m_isConnected = false;
m_userID = 0;
}
@ -424,6 +427,8 @@ namespace SMBLibrary.Client
ConnectionState state = (ConnectionState)ar.AsyncState;
Socket clientSocket = state.ClientSocket;
lock (state.ReceiveBuffer)
{
if (!clientSocket.Connected)
{
state.ReceiveBuffer.Dispose();
@ -485,6 +490,7 @@ namespace SMBLibrary.Client
}
}
}
}
private void ProcessConnectionBuffer(ConnectionState state)
{

6
SMBLibrary/Client/SMB2Client.cs
View file

@ -182,7 +182,10 @@ namespace SMBLibrary.Client
{
m_clientSocket.Disconnect(false);
m_clientSocket.Close();
lock (m_connectionState.ReceiveBuffer)
{
m_connectionState.ReceiveBuffer.Dispose();
}
m_isConnected = false;
m_messageID = 0;
m_sessionID = 0;
@ -357,6 +360,8 @@ namespace SMBLibrary.Client
ConnectionState state = (ConnectionState)ar.AsyncState;
Socket clientSocket = state.ClientSocket;
lock (state.ReceiveBuffer)
{
if (!clientSocket.Connected)
{
state.ReceiveBuffer.Dispose();
@ -418,6 +423,7 @@ namespace SMBLibrary.Client
}
}
}
}
private void ProcessConnectionBuffer(ConnectionState state)
{

9
SMBLibrary/NetBios/NBTConnectionReceiveBuffer.cs
View file

@ -13,11 +13,11 @@ using Utilities;
namespace SMBLibrary.NetBios
{
/// <remarks>
/// NBTConnectionReceiveBuffer is not thread-safe.
/// </remarks>
public class NBTConnectionReceiveBuffer : IDisposable
{
#if NETSTANDARD2_0
private object m_bufferSyncLock = new object();
#endif
private byte[] m_buffer;
private int m_readOffset = 0;
private int m_bytesInBuffer = 0;
@ -131,14 +131,11 @@ namespace SMBLibrary.NetBios
public void Dispose()
{
#if NETSTANDARD2_0
lock (m_bufferSyncLock)
{
if (m_buffer != null)
{
ArrayPool<byte>.Shared.Return(m_buffer);
m_buffer = null;
}
}
#else
m_buffer = null;
#endif

3
SMBLibrary/Server/ConnectionManager.cs
View file

@ -42,7 +42,10 @@ namespace SMBLibrary.Server
connection.SendQueue.Stop();
SocketUtils.ReleaseSocket(connection.ClientSocket);
connection.CloseSessions();
lock (connection.ReceiveBuffer)
{
connection.ReceiveBuffer.Dispose();
}
RemoveConnection(connection);
}

3
SMBLibrary/Server/SMBServer.cs
View file

@ -230,6 +230,8 @@ namespace SMBLibrary.Server
ConnectionState state = (ConnectionState)result.AsyncState;
Socket clientSocket = state.ClientSocket;
lock (state.ReceiveBuffer)
{
if (!m_listening)
{
clientSocket.Close();
@ -290,6 +292,7 @@ namespace SMBLibrary.Server
}
}
}
}
private void ProcessConnectionBuffer(ref ConnectionState state)
{