Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-07-10 22:55:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

Temporarily undo KeAttachProcess() done by win32k

Browse source 
svn path=/trunk/; revision=9567
This commit is contained in:
Gé van Geldorp 2004-05-31 11:47:05 +00:00
parent f9375c3f90
commit 6855f27251
1 changed files with 52 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

54
reactos/ntoskrnl/lpc/send.c
View file

@ -1,4 +1,4 @@
/* $Id: send.c,v 1.14 2004/01/07 21:13:22 ea Exp $
/* $Id: send.c,v 1.15 2004/05/31 11:47:05 gvg Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -16,6 +16,7 @@
#include <internal/port.h>
#include <internal/dbg.h>
#include <internal/safe.h>
#include <internal/ps.h>
#define NDEBUG
#include <internal/debug.h>
@ -222,6 +223,8 @@ NtRequestWaitReplyPort (IN HANDLE PortHandle,
PLPC_MESSAGE UnsafeLpcRequest,
PLPC_MESSAGE UnsafeLpcReply)
{
PETHREAD CurrentThread;
struct _EPROCESS *AttachedProcess;
NTSTATUS Status;
PEPORT Port;
PQUEUEDMESSAGE Message;
@ -243,22 +246,49 @@ NtRequestWaitReplyPort (IN HANDLE PortHandle,
return(Status);
}
/* win32k sometimes needs to KeAttach() the CSRSS process in order to make
the PortHandle valid. Now that we've got the EPORT structure from the
handle we can undo this, so everything is normal again. Need to
re-KeAttach() before returning though */
CurrentThread = PsGetCurrentThread();
if (NULL == CurrentThread->OldProcess)
{
AttachedProcess = NULL;
}
else
{
AttachedProcess = CurrentThread->ThreadsProcess;
KeDetachProcess();
}
Status = MmCopyFromCaller(&LpcRequestMessageSize,
&UnsafeLpcRequest->MessageSize,
sizeof(USHORT));
if (!NT_SUCCESS(Status))
{
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(Status);
}
if (LpcRequestMessageSize > (sizeof(LPC_MESSAGE) + MAX_MESSAGE_DATA))
{
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(STATUS_PORT_MESSAGE_TOO_LONG);
}
LpcRequest = ExAllocatePool(NonPagedPool, LpcRequestMessageSize);
if (LpcRequest == NULL)
{
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(STATUS_NO_MEMORY);
}
@ -267,6 +297,10 @@ NtRequestWaitReplyPort (IN HANDLE PortHandle,
if (!NT_SUCCESS(Status))
{
ExFreePool(LpcRequest);
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(Status);
}
@ -274,12 +308,20 @@ NtRequestWaitReplyPort (IN HANDLE PortHandle,
if (LpcRequestMessageSize > (sizeof(LPC_MESSAGE) + MAX_MESSAGE_DATA))
{
ExFreePool(LpcRequest);
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(STATUS_PORT_MESSAGE_TOO_LONG);
}
if (LpcRequest->DataSize != (LpcRequest->MessageSize - sizeof(LPC_MESSAGE)))
{
ExFreePool(LpcRequest);
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(STATUS_PORT_MESSAGE_TOO_LONG);
}
@ -290,8 +332,12 @@ NtRequestWaitReplyPort (IN HANDLE PortHandle,
Port);
if (!NT_SUCCESS(Status))
{
DbgPrint("Enqueue failed\n");
DPRINT1("Enqueue failed\n");
ExFreePool(LpcRequest);
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(Status);
}
@ -334,6 +380,10 @@ NtRequestWaitReplyPort (IN HANDLE PortHandle,
Status = STATUS_UNSUCCESSFUL;
}
}
if (NULL != AttachedProcess)
{
KeAttachProcess(AttachedProcess);
}
ObDereferenceObject(Port);
return(Status);