쓰레드 생성후 스택오버플로우 발생 질문 드립니다.

thRecv = CreateThread(NULL, 0, &RecvCommunicate, &hSock, 0, &thRecvId);//스택오버플로우 발생

DWORD WINAPI RecvCommunicate(LPVOID hSock)
{
	static int Recvcnt;
	CMNICTHDR RecvBuff[SENDBUFF];
 
	memset(RecvBuff, 0, sizeof(CMNICTHDR));
	int rRecv=0,EndPoint=SENDBUFF;
	while (1)
	{
		if (Recvcnt == EndPoint)
		{
			int AllocCheck = 0;
			for (int nCol = EndPoint - 1; nCol <= 0; nCol--) //수신버퍼가 커질수록 부하가 커진다 해결방안 찾아보기
			{
				if (RecvBuff[nCol].Command == 0)
				{
					if (nCol + FREESPACE < EndPoint)
					{
						Recvcnt = nCol;
						AllocCheck = 1;
						break;
					}
				}
			}
			if (AllocCheck == 0)
			{
				realloc(RecvBuff, sizeof(CMNICTHDR)*SENDBUFF);
				EndPoint = SENDBUFF + Recvcnt;
			}
		}
		rRecv = recv(*(SOCKET*)hSock,(char*)&RecvBuff[Recvcnt],sizeof(CMNICTHDR),0);
		if (rRecv == -1)
		{
			int reRecv=0;
			while (reRecv < RERECVMAX)
			{
				rRecv = recv(*(SOCKET*)hSock, (char*)&RecvBuff[Recvcnt], sizeof(CMNICTHDR), 0);
				if (rRecv != -1)
				{
					break;
				}
				else if (rRecv == -1 && reRecv == 2)
				{
					return GetLastError();
				}
				reRecv++;
			}
		}
		Recvcnt++;
	}
	return 0;
}