7 Nov
2016
7 Nov
'16
1:24 a.m.
Author: hbelusca
Date: Mon Nov 7 01:24:24 2016
New Revision: 73164
URL: http://svn.reactos.org/svn/reactos?rev=73164&view=rev
Log:
[NTOS:LPC]
- Fix the usage, or add support (for NtSecureConnectPort based on patches by Alexander
Andrejevic, and for NtReplyPort, NtReplyWaitReceivePortEx, NtListenPort by me) for
capturing user-mode parameters and using SEH in LPC functions.
CORE-7371 #resolve
- Make NtSecureConnectPort call SeQueryInformationToken, now that the latter is
implemented since r73122.
- Fix ObDereferenceObject usage for Port vs. ClientPort in NtSecureConnectPort.
- ObCloseHandle certainly needs to be called with the actual 'PreviousMode'.
Modified:
trunk/reactos/ntoskrnl/lpc/complete.c
trunk/reactos/ntoskrnl/lpc/connect.c
trunk/reactos/ntoskrnl/lpc/create.c
trunk/reactos/ntoskrnl/lpc/listen.c
trunk/reactos/ntoskrnl/lpc/port.c
trunk/reactos/ntoskrnl/lpc/reply.c
trunk/reactos/ntoskrnl/lpc/send.c
Modified: trunk/reactos/ntoskrnl/lpc/complete.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/complete.c?re…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/complete.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/complete.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -46,6 +46,8 @@
{
NTSTATUS Status;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
+ PORT_VIEW CapturedServerView;
+ PORT_MESSAGE CapturedReplyMessage;
ULONG ConnectionInfoLength;
PLPCP_PORT_OBJECT ConnectionPort, ServerPort, ClientPort;
PLPCP_CONNECTION_MESSAGE ConnectMessage;
@@ -55,8 +57,6 @@
PEPROCESS ClientProcess;
PETHREAD ClientThread;
LARGE_INTEGER SectionOffset;
- CLIENT_ID ClientId;
- ULONG MessageId;
PAGED_CODE();
LPCTRACE(LPC_COMPLETE_DEBUG,
@@ -70,18 +70,15 @@
/* Check if the call comes from user mode */
if (PreviousMode != KernelMode)
{
- /* Enter SEH for probing the parameters */
_SEH2_TRY
{
+ /* Probe the PortHandle */
ProbeForWriteHandle(PortHandle);
/* Probe the basic ReplyMessage structure */
- ProbeForRead(ReplyMessage, sizeof(PORT_MESSAGE), sizeof(ULONG));
-
- /* Grab some values */
- ClientId = ReplyMessage->ClientId;
- MessageId = ReplyMessage->MessageId;
- ConnectionInfoLength = ReplyMessage->u1.s1.DataLength;
+ ProbeForRead(ReplyMessage, sizeof(*ReplyMessage), sizeof(ULONG));
+ CapturedReplyMessage = *(volatile PORT_MESSAGE*)ReplyMessage;
+ ConnectionInfoLength = CapturedReplyMessage.u1.s1.DataLength;
/* Probe the connection info */
ProbeForRead(ReplyMessage + 1, ConnectionInfoLength, 1);
@@ -89,10 +86,11 @@
/* The following parameters are optional */
if (ServerView != NULL)
{
- ProbeForWrite(ServerView, sizeof(PORT_VIEW), sizeof(ULONG));
+ ProbeForWrite(ServerView, sizeof(*ServerView), sizeof(ULONG));
+ CapturedServerView = *(volatile PORT_VIEW*)ServerView;
/* Validate the size of the server view */
- if (ServerView->Length != sizeof(PORT_VIEW))
+ if (CapturedServerView.Length != sizeof(CapturedServerView))
{
/* Invalid size */
_SEH2_YIELD(return STATUS_INVALID_PARAMETER);
@@ -101,10 +99,10 @@
if (ClientView != NULL)
{
- ProbeForWrite(ClientView, sizeof(REMOTE_PORT_VIEW), sizeof(ULONG));
+ ProbeForWrite(ClientView, sizeof(*ClientView), sizeof(ULONG));
/* Validate the size of the client view */
- if (ClientView->Length != sizeof(REMOTE_PORT_VIEW))
+ if (((volatile REMOTE_PORT_VIEW*)ClientView)->Length !=
sizeof(*ClientView))
{
/* Invalid size */
_SEH2_YIELD(return STATUS_INVALID_PARAMETER);
@@ -120,20 +118,19 @@
}
else
{
- /* Grab some values */
- ClientId = ReplyMessage->ClientId;
- MessageId = ReplyMessage->MessageId;
- ConnectionInfoLength = ReplyMessage->u1.s1.DataLength;
+ CapturedReplyMessage = *ReplyMessage;
+ ConnectionInfoLength = CapturedReplyMessage.u1.s1.DataLength;
/* Validate the size of the server view */
- if ((ServerView) && (ServerView->Length != sizeof(PORT_VIEW)))
+ if ((ServerView) && (ServerView->Length != sizeof(*ServerView)))
{
/* Invalid size */
return STATUS_INVALID_PARAMETER;
}
+ CapturedServerView = *ServerView;
/* Validate the size of the client view */
- if ((ClientView) && (ClientView->Length != sizeof(REMOTE_PORT_VIEW)))
+ if ((ClientView) && (ClientView->Length != sizeof(*ClientView)))
{
/* Invalid size */
return STATUS_INVALID_PARAMETER;
@@ -141,7 +138,7 @@
}
/* Get the client process and thread */
- Status = PsLookupProcessThreadByCid(&ClientId,
+ Status = PsLookupProcessThreadByCid(&CapturedReplyMessage.ClientId,
&ClientProcess,
&ClientThread);
if (!NT_SUCCESS(Status)) return Status;
@@ -151,8 +148,8 @@
/* Make sure that the client wants a reply, and this is the right one */
if (!(LpcpGetMessageFromThread(ClientThread)) ||
- !(MessageId) ||
- (ClientThread->LpcReplyMessageId != MessageId))
+ !(CapturedReplyMessage.MessageId) ||
+ (ClientThread->LpcReplyMessageId != CapturedReplyMessage.MessageId))
{
/* Not the reply asked for, or no reply wanted, fail */
KeReleaseGuardedMutex(&LpcpLock);
@@ -203,8 +200,8 @@
/* Setup the reply message */
Message->Request.u2.s2.Type = LPC_REPLY;
Message->Request.u2.s2.DataInfoOffset = 0;
- Message->Request.ClientId = ClientId;
- Message->Request.MessageId = MessageId;
+ Message->Request.ClientId = CapturedReplyMessage.ClientId;
+ Message->Request.MessageId = CapturedReplyMessage.MessageId;
Message->Request.ClientViewSize = 0;
_SEH2_TRY
@@ -310,6 +307,7 @@
if (ServerView)
{
/* FIXME: TODO */
+ UNREFERENCED_PARAMETER(CapturedServerView);
ASSERT(FALSE);
}
@@ -347,7 +345,7 @@
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Cleanup and return the exception code */
- ObCloseHandle(Handle, UserMode);
+ ObCloseHandle(Handle, PreviousMode);
ObDereferenceObject(ServerPort);
Status = _SEH2_GetExceptionCode();
_SEH2_YIELD(goto Cleanup);
Modified: trunk/reactos/ntoskrnl/lpc/connect.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/connect.c?rev…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/connect.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/connect.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -90,6 +90,9 @@
NTSTATUS Status = STATUS_SUCCESS;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
PETHREAD Thread = PsGetCurrentThread();
+ SECURITY_QUALITY_OF_SERVICE CapturedQos;
+ PORT_VIEW CapturedClientView;
+ PSID CapturedServerSid;
ULONG ConnectionInfoLength = 0;
PLPCP_PORT_OBJECT Port, ClientPort;
PLPCP_MESSAGE Message;
@@ -110,25 +113,122 @@
ServerView,
ServerSid);
- /* Validate client view */
- if ((ClientView) && (ClientView->Length != sizeof(PORT_VIEW)))
- {
- /* Fail */
- return STATUS_INVALID_PARAMETER;
- }
-
- /* Validate server view */
- if ((ServerView) && (ServerView->Length != sizeof(REMOTE_PORT_VIEW)))
- {
- /* Fail */
- return STATUS_INVALID_PARAMETER;
- }
-
- /* Check if caller sent connection information length */
- if (ConnectionInformationLength)
- {
- /* Retrieve the input length */
- ConnectionInfoLength = *ConnectionInformationLength;
+ /* Check if the call comes from user mode */
+ if (PreviousMode != KernelMode)
+ {
+ /* Enter SEH for probing the parameters */
+ _SEH2_TRY
+ {
+ /* Probe the PortHandle */
+ ProbeForWriteHandle(PortHandle);
+
+ /* Probe and capture the QoS */
+ ProbeForRead(SecurityQos, sizeof(*SecurityQos), sizeof(ULONG));
+ CapturedQos = *(volatile SECURITY_QUALITY_OF_SERVICE*)SecurityQos;
+ /* NOTE: Do not care about CapturedQos.Length */
+
+ /* The following parameters are optional */
+
+ /* Capture the client view */
+ if (ClientView != NULL)
+ {
+ ProbeForWrite(ClientView, sizeof(*ClientView), sizeof(ULONG));
+ CapturedClientView = *(volatile PORT_VIEW*)ClientView;
+
+ /* Validate the size of the client view */
+ if (CapturedClientView.Length != sizeof(CapturedClientView))
+ {
+ /* Invalid size */
+ _SEH2_YIELD(return STATUS_INVALID_PARAMETER);
+ }
+
+ }
+
+ /* Capture the server view */
+ if (ServerView != NULL)
+ {
+ ProbeForWrite(ServerView, sizeof(*ServerView), sizeof(ULONG));
+
+ /* Validate the size of the server view */
+ if (((volatile REMOTE_PORT_VIEW*)ServerView)->Length !=
sizeof(*ServerView))
+ {
+ /* Invalid size */
+ _SEH2_YIELD(return STATUS_INVALID_PARAMETER);
+ }
+ }
+
+ if (MaxMessageLength)
+ ProbeForWriteUlong(MaxMessageLength);
+
+ /* Capture connection information length */
+ if (ConnectionInformationLength)
+ {
+ ProbeForWriteUlong(ConnectionInformationLength);
+ ConnectionInfoLength = *(volatile ULONG*)ConnectionInformationLength;
+ }
+
+ /* Probe the ConnectionInformation */
+ if (ConnectionInformation)
+ ProbeForWrite(ConnectionInformation, ConnectionInfoLength,
sizeof(ULONG));
+
+ CapturedServerSid = ServerSid;
+ if (ServerSid != NULL)
+ {
+ /* Capture it */
+ Status = SepCaptureSid(ServerSid,
+ PreviousMode,
+ PagedPool,
+ TRUE,
+ &CapturedServerSid);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Failed to capture ServerSid!\n");
+ _SEH2_YIELD(return Status);
+ }
+ }
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ /* There was an exception, return the exception code */
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
+ }
+ else
+ {
+ CapturedQos = *SecurityQos;
+ /* NOTE: Do not care about CapturedQos.Length */
+
+ /* The following parameters are optional */
+
+ /* Capture the client view */
+ if (ClientView != NULL)
+ {
+ /* Validate the size of the client view */
+ if (ClientView->Length != sizeof(*ClientView))
+ {
+ /* Invalid size */
+ return STATUS_INVALID_PARAMETER;
+ }
+ CapturedClientView = *ClientView;
+ }
+
+ /* Capture the server view */
+ if (ServerView != NULL)
+ {
+ /* Validate the size of the server view */
+ if (ServerView->Length != sizeof(*ServerView))
+ {
+ /* Invalid size */
+ return STATUS_INVALID_PARAMETER;
+ }
+ }
+
+ /* Capture connection information length */
+ if (ConnectionInformationLength)
+ ConnectionInfoLength = *ConnectionInformationLength;
+
+ CapturedServerSid = ServerSid;
}
/* Get the port */
@@ -143,6 +243,10 @@
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to reference port '%wZ': 0x%lx\n", PortName,
Status);
+
+ if (CapturedServerSid != ServerSid)
+ SepReleaseSid(CapturedServerSid, PreviousMode, TRUE);
+
return Status;
}
@@ -151,10 +255,14 @@
{
/* It isn't, so fail */
ObDereferenceObject(Port);
+
+ if (CapturedServerSid != ServerSid)
+ SepReleaseSid(CapturedServerSid, PreviousMode, TRUE);
+
return STATUS_INVALID_PORT_HANDLE;
}
- /* Check if we have a SID */
+ /* Check if we have a (captured) SID */
if (ServerSid)
{
/* Make sure that we have a server */
@@ -162,18 +270,14 @@
{
/* Get its token and query user information */
Token = PsReferencePrimaryToken(Port->ServerProcess);
- //Status = SeQueryInformationToken(Token, TokenUser,
(PVOID*)&TokenUserInfo);
- // FIXME: Need SeQueryInformationToken
- Status = STATUS_SUCCESS;
- TokenUserInfo = ExAllocatePoolWithTag(PagedPool, sizeof(TOKEN_USER), TAG_SE);
- TokenUserInfo->User.Sid = ServerSid;
+ Status = SeQueryInformationToken(Token, TokenUser,
(PVOID*)&TokenUserInfo);
PsDereferencePrimaryToken(Token);
/* Check for success */
if (NT_SUCCESS(Status))
{
/* Compare the SIDs */
- if (!RtlEqualSid(ServerSid, TokenUserInfo->User.Sid))
+ if (!RtlEqualSid(CapturedServerSid, TokenUserInfo->User.Sid))
{
/* Fail */
Status = STATUS_SERVER_SID_MISMATCH;
@@ -188,6 +292,10 @@
/* Invalid SID */
Status = STATUS_SERVER_SID_MISMATCH;
}
+
+ /* Finally release the captured SID, we don't need it anymore */
+ if (CapturedServerSid != ServerSid)
+ SepReleaseSid(CapturedServerSid, PreviousMode, TRUE);
/* Check if SID failed */
if (!NT_SUCCESS(Status))
@@ -215,17 +323,20 @@
return Status;
}
- /* Setup the client port */
+ /*
+ * Setup the client port -- From now on, dereferencing the client port
+ * will automatically dereference the connection port too.
+ */
RtlZeroMemory(ClientPort, sizeof(LPCP_PORT_OBJECT));
ClientPort->Flags = LPCP_CLIENT_PORT;
ClientPort->ConnectionPort = Port;
ClientPort->MaxMessageLength = Port->MaxMessageLength;
- ClientPort->SecurityQos = *Qos;
+ ClientPort->SecurityQos = CapturedQos;
InitializeListHead(&ClientPort->LpcReplyChainHead);
InitializeListHead(&ClientPort->LpcDataInfoChainHead);
/* Check if we have dynamic security */
- if (Qos->ContextTrackingMode == SECURITY_DYNAMIC_TRACKING)
+ if (CapturedQos.ContextTrackingMode == SECURITY_DYNAMIC_TRACKING)
{
/* Remember that */
ClientPort->Flags |= LPCP_SECURITY_DYNAMIC;
@@ -234,7 +345,7 @@
{
/* Create our own client security */
Status = SeCreateClientSecurity(Thread,
- Qos,
+ &CapturedQos,
FALSE,
&ClientPort->StaticSecurity);
if (!NT_SUCCESS(Status))
@@ -258,7 +369,7 @@
if (ClientView)
{
/* Get the section handle */
- Status = ObReferenceObjectByHandle(ClientView->SectionHandle,
+ Status = ObReferenceObjectByHandle(CapturedClientView.SectionHandle,
SECTION_MAP_READ |
SECTION_MAP_WRITE,
MmSectionObjectType,
@@ -268,12 +379,12 @@
if (!NT_SUCCESS(Status))
{
/* Fail */
- ObDereferenceObject(Port);
+ ObDereferenceObject(ClientPort);
return Status;
}
/* Set the section offset */
- SectionOffset.QuadPart = ClientView->SectionOffset;
+ SectionOffset.QuadPart = CapturedClientView.SectionOffset;
/* Map it */
Status = MmMapViewOfSection(SectionToMap,
@@ -282,25 +393,25 @@
0,
0,
&SectionOffset,
- &ClientView->ViewSize,
+ &CapturedClientView.ViewSize,
ViewUnmap,
0,
PAGE_READWRITE);
/* Update the offset */
- ClientView->SectionOffset = SectionOffset.LowPart;
+ CapturedClientView.SectionOffset = SectionOffset.LowPart;
/* Check for failure */
if (!NT_SUCCESS(Status))
{
/* Fail */
ObDereferenceObject(SectionToMap);
- ObDereferenceObject(Port);
+ ObDereferenceObject(ClientPort);
return Status;
}
/* Update the base */
- ClientView->ViewBase = ClientPort->ClientSectionBase;
+ CapturedClientView.ViewBase = ClientPort->ClientSectionBase;
/* Reference and remember the process */
ClientPort->MappingProcess = PsGetCurrentProcess();
@@ -337,12 +448,12 @@
if (ClientView)
{
/* Set the view size */
- Message->Request.ClientViewSize = ClientView->ViewSize;
+ Message->Request.ClientViewSize = CapturedClientView.ViewSize;
/* Copy the client view and clear the server view */
RtlCopyMemory(&ConnectMessage->ClientView,
- ClientView,
- sizeof(PORT_VIEW));
+ &CapturedClientView,
+ sizeof(CapturedClientView));
RtlZeroMemory(&ConnectMessage->ServerView, sizeof(REMOTE_PORT_VIEW));
}
else
@@ -366,11 +477,32 @@
/* Check if we have connection information */
if (ConnectionInformation)
{
- /* Copy it in */
- RtlCopyMemory(ConnectMessage + 1,
- ConnectionInformation,
- ConnectionInfoLength);
- }
+ _SEH2_TRY
+ {
+ /* Copy it in */
+ RtlCopyMemory(ConnectMessage + 1,
+ ConnectionInformation,
+ ConnectionInfoLength);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ /* Cleanup and return the exception code */
+
+ /* Free the message we have */
+ LpcpFreeToPortZone(Message, 0);
+
+ /* Dereference other objects */
+ if (SectionToMap) ObDereferenceObject(SectionToMap);
+ ObDereferenceObject(ClientPort);
+
+ /* Return status */
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
+ }
+
+ /* Reset the status code */
+ Status = STATUS_SUCCESS;
/* Acquire the port lock */
KeAcquireGuardedMutex(&LpcpLock);
@@ -433,11 +565,25 @@
LpcpConnectWait(&Thread->LpcReplySemaphore, PreviousMode);
}
+ /* Now, always free the connection message */
+ SectionToMap = LpcpFreeConMsg(&Message, &ConnectMessage, Thread);
+
/* Check for failure */
- if (!NT_SUCCESS(Status)) goto Cleanup;
-
- /* Free the connection message */
- SectionToMap = LpcpFreeConMsg(&Message, &ConnectMessage, Thread);
+ if (!NT_SUCCESS(Status))
+ {
+ /* Check if the semaphore got signaled in the meantime */
+ if (KeReadStateSemaphore(&Thread->LpcReplySemaphore))
+ {
+ /* Wait on it */
+ KeWaitForSingleObject(&Thread->LpcReplySemaphore,
+ WrExecutive,
+ KernelMode,
+ FALSE,
+ NULL);
+ }
+
+ goto Failure;
+ }
/* Check if we got a message back */
if (Message)
@@ -451,20 +597,27 @@
sizeof(LPCP_CONNECTION_MESSAGE);
}
- /* Check if we had connection information */
+ /* Check if the caller had connection information */
if (ConnectionInformation)
{
- /* Check if we had a length pointer */
- if (ConnectionInformationLength)
- {
- /* Return the length */
- *ConnectionInformationLength = ConnectionInfoLength;
- }
-
- /* Return the connection information */
- RtlCopyMemory(ConnectionInformation,
- ConnectMessage + 1,
- ConnectionInfoLength );
+ _SEH2_TRY
+ {
+ /* Return the connection information length if needed */
+ if (ConnectionInformationLength)
+ *ConnectionInformationLength = ConnectionInfoLength;
+
+ /* Return the connection information */
+ RtlCopyMemory(ConnectionInformation,
+ ConnectMessage + 1,
+ ConnectionInfoLength);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ /* Cleanup and return the exception code */
+ Status = _SEH2_GetExceptionCode();
+ _SEH2_YIELD(goto Failure);
+ }
+ _SEH2_END;
}
/* Make sure we had a connected port */
@@ -482,33 +635,45 @@
&Handle);
if (NT_SUCCESS(Status))
{
- /* Return the handle */
- *PortHandle = Handle;
LPCTRACE(LPC_CONNECT_DEBUG,
"Handle: %p. Length: %lx\n",
Handle,
PortMessageLength);
- /* Check if maximum length was requested */
- if (MaxMessageLength) *MaxMessageLength = PortMessageLength;
-
- /* Check if we had a client view */
- if (ClientView)
+ _SEH2_TRY
{
- /* Copy it back */
- RtlCopyMemory(ClientView,
- &ConnectMessage->ClientView,
- sizeof(PORT_VIEW));
+ /* Return the handle */
+ *PortHandle = Handle;
+
+ /* Check if maximum length was requested */
+ if (MaxMessageLength)
+ *MaxMessageLength = PortMessageLength;
+
+ /* Check if we had a client view */
+ if (ClientView)
+ {
+ /* Copy it back */
+ RtlCopyMemory(ClientView,
+ &ConnectMessage->ClientView,
+ sizeof(*ClientView));
+ }
+
+ /* Check if we had a server view */
+ if (ServerView)
+ {
+ /* Copy it back */
+ RtlCopyMemory(ServerView,
+ &ConnectMessage->ServerView,
+ sizeof(*ServerView));
+ }
}
-
- /* Check if we had a server view */
- if (ServerView)
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- /* Copy it back */
- RtlCopyMemory(ServerView,
- &ConnectMessage->ServerView,
- sizeof(REMOTE_PORT_VIEW));
+ /* An exception happened, close the opened handle */
+ ObCloseHandle(Handle, PreviousMode);
+ Status = _SEH2_GetExceptionCode();
}
+ _SEH2_END;
}
}
else
@@ -545,39 +710,25 @@
else
{
/* No reply message, fail */
- if (SectionToMap) ObDereferenceObject(SectionToMap);
- ObDereferenceObject(ClientPort);
Status = STATUS_PORT_CONNECTION_REFUSED;
- }
+ goto Failure;
+ }
+
+ ObDereferenceObject(Port);
/* Return status */
- ObDereferenceObject(Port);
return Status;
-Cleanup:
- /* We failed, free the message */
- SectionToMap = LpcpFreeConMsg(&Message, &ConnectMessage, Thread);
-
- /* Check if the semaphore got signaled */
- if (KeReadStateSemaphore(&Thread->LpcReplySemaphore))
- {
- /* Wait on it */
- KeWaitForSingleObject(&Thread->LpcReplySemaphore,
- WrExecutive,
- KernelMode,
- FALSE,
- NULL);
- }
-
+Failure:
/* Check if we had a message and free it */
if (Message) LpcpFreeToPortZone(Message, 0);
/* Dereference other objects */
if (SectionToMap) ObDereferenceObject(SectionToMap);
ObDereferenceObject(ClientPort);
+ ObDereferenceObject(Port);
/* Return status */
- ObDereferenceObject(Port);
return Status;
}
Modified: trunk/reactos/ntoskrnl/lpc/create.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/create.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/create.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/create.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -49,13 +49,14 @@
{
NTSTATUS Status;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
+ UNICODE_STRING CapturedObjectName, *ObjectName;
PLPCP_PORT_OBJECT Port;
HANDLE Handle;
- PUNICODE_STRING ObjectName;
- BOOLEAN NoName;
PAGED_CODE();
LPCTRACE(LPC_CREATE_DEBUG, "Name: %wZ\n", ObjectAttributes->ObjectName);
+
+ RtlInitEmptyUnicodeString(&CapturedObjectName, NULL, 0);
/* Check if the call comes from user mode */
if (PreviousMode != KernelMode)
@@ -65,15 +66,14 @@
/* Probe the PortHandle */
ProbeForWriteHandle(PortHandle);
- /* Probe the ObjectAttributes */
- ProbeForRead(ObjectAttributes, sizeof(OBJECT_ATTRIBUTES), sizeof(ULONG));
-
- /* Get the object name and probe the unicode string */
- ObjectName = ObjectAttributes->ObjectName;
- ProbeForRead(ObjectName, sizeof(UNICODE_STRING), 1);
-
- /* Check if we have no name */
- NoName = (ObjectName->Buffer == NULL) || (ObjectName->Length == 0);
+ /* Probe the ObjectAttributes and its object name (not the buffer) */
+ ProbeForRead(ObjectAttributes, sizeof(*ObjectAttributes), sizeof(ULONG));
+ ObjectName = ((volatile OBJECT_ATTRIBUTES*)ObjectAttributes)->ObjectName;
+ if (ObjectName)
+ {
+ ProbeForRead(ObjectName, sizeof(*ObjectName), 1);
+ CapturedObjectName = *(volatile UNICODE_STRING*)ObjectName;
+ }
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
@@ -84,10 +84,13 @@
}
else
{
- /* Check if we have no name */
- NoName = (ObjectAttributes->ObjectName->Buffer == NULL) ||
- (ObjectAttributes->ObjectName->Length == 0);
- }
+ if (ObjectAttributes->ObjectName)
+ CapturedObjectName = *(ObjectAttributes->ObjectName);
+ }
+
+ /* Normalize the buffer pointer in case we don't have a name */
+ if (CapturedObjectName.Length == 0)
+ CapturedObjectName.Buffer = NULL;
/* Create the Object */
Status = ObCreateObject(PreviousMode,
@@ -109,7 +112,7 @@
InitializeListHead(&Port->LpcReplyChainHead);
/* Check if we don't have a name */
- if (NoName)
+ if (CapturedObjectName.Buffer == NULL)
{
/* Set up for an unconnected port */
Port->Flags = LPCP_UNCONNECTED_PORT;
@@ -187,7 +190,8 @@
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- ObCloseHandle(Handle, UserMode);
+ /* An exception happened, close the opened handle */
+ ObCloseHandle(Handle, PreviousMode);
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
Modified: trunk/reactos/ntoskrnl/lpc/listen.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/listen.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/listen.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/listen.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -36,13 +36,22 @@
NULL,
ConnectMessage);
- /* Accept only LPC_CONNECTION_REQUEST requests */
- if ((Status != STATUS_SUCCESS) ||
- (LpcpGetMessageType(ConnectMessage) == LPC_CONNECTION_REQUEST))
+ _SEH2_TRY
{
- /* Break out */
- break;
+ /* Accept only LPC_CONNECTION_REQUEST requests */
+ if ((Status != STATUS_SUCCESS) ||
+ (LpcpGetMessageType(ConnectMessage) == LPC_CONNECTION_REQUEST))
+ {
+ /* Break out */
+ _SEH2_YIELD(break);
+ }
}
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ Status = _SEH2_GetExceptionCode();
+ _SEH2_YIELD(break);
+ }
+ _SEH2_END;
}
/* Return status */
Modified: trunk/reactos/ntoskrnl/lpc/port.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/port.c?rev=73…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/port.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/port.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -136,27 +136,25 @@
PAGED_CODE();
- /* Check the previous mode */
- PreviousMode = ExGetPreviousMode();
- if (PreviousMode == KernelMode)
- {
- ClientId = ClientMessage->ClientId;
- MessageId = ClientMessage->MessageId;
- }
- else
+ /* Check if the call comes from user mode */
+ if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
ProbeForRead(ClientMessage, sizeof(*ClientMessage), sizeof(PVOID));
- ClientId = ClientMessage->ClientId;
- MessageId = ClientMessage->MessageId;
+ ClientId = ((volatile PORT_MESSAGE*)ClientMessage)->ClientId;
+ MessageId = ((volatile PORT_MESSAGE*)ClientMessage)->MessageId;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- DPRINT1("Got exception!\n");
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
+ }
+ else
+ {
+ ClientId = ClientMessage->ClientId;
+ MessageId = ClientMessage->MessageId;
}
/* Reference the port handle */
Modified: trunk/reactos/ntoskrnl/lpc/reply.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/reply.c?rev=7…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/reply.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/reply.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -192,7 +192,7 @@
{
NTSTATUS Status;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode();
- // PORT_MESSAGE CapturedReplyMessage;
+ PORT_MESSAGE CapturedReplyMessage;
PLPCP_PORT_OBJECT Port;
PLPCP_MESSAGE Message;
PETHREAD Thread = PsGetCurrentThread(), WakeupThread;
@@ -203,32 +203,35 @@
PortHandle,
ReplyMessage);
- if (KeGetPreviousMode() == UserMode)
+ /* Check if the call comes from user mode */
+ if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
- ProbeForRead(ReplyMessage, sizeof(PORT_MESSAGE), sizeof(ULONG));
- /*RtlCopyMemory(&CapturedReplyMessage, ReplyMessage,
sizeof(PORT_MESSAGE));
- ReplyMessage = &CapturedReplyMessage;*/
- }
- _SEH2_EXCEPT(ExSystemExceptionFilter())
- {
- DPRINT1("SEH crash [1]\n");
+ ProbeForRead(ReplyMessage, sizeof(*ReplyMessage), sizeof(ULONG));
+ CapturedReplyMessage = *(volatile PORT_MESSAGE*)ReplyMessage;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
}
+ else
+ {
+ CapturedReplyMessage = *ReplyMessage;
+ }
/* Validate its length */
- if (((ULONG)ReplyMessage->u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
- (ULONG)ReplyMessage->u1.s1.TotalLength)
+ if (((ULONG)CapturedReplyMessage.u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
+ (ULONG)CapturedReplyMessage.u1.s1.TotalLength)
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Make sure it has a valid ID */
- if (!ReplyMessage->MessageId) return STATUS_INVALID_PARAMETER;
+ if (!CapturedReplyMessage.MessageId) return STATUS_INVALID_PARAMETER;
/* Get the Port object */
Status = ObReferenceObjectByHandle(PortHandle,
@@ -240,9 +243,9 @@
if (!NT_SUCCESS(Status)) return Status;
/* Validate its length in respect to the port object */
- if (((ULONG)ReplyMessage->u1.s1.TotalLength > Port->MaxMessageLength) ||
- ((ULONG)ReplyMessage->u1.s1.TotalLength <=
- (ULONG)ReplyMessage->u1.s1.DataLength))
+ if (((ULONG)CapturedReplyMessage.u1.s1.TotalLength > Port->MaxMessageLength) ||
+ ((ULONG)CapturedReplyMessage.u1.s1.TotalLength <=
+ (ULONG)CapturedReplyMessage.u1.s1.DataLength))
{
/* Too large, fail */
ObDereferenceObject(Port);
@@ -250,7 +253,7 @@
}
/* Get the ETHREAD corresponding to it */
- Status = PsLookupProcessThreadByCid(&ReplyMessage->ClientId,
+ Status = PsLookupProcessThreadByCid(&CapturedReplyMessage.ClientId,
NULL,
&WakeupThread);
if (!NT_SUCCESS(Status))
@@ -274,7 +277,7 @@
KeAcquireGuardedMutex(&LpcpLock);
/* Make sure this is the reply the thread is waiting for */
- if ((WakeupThread->LpcReplyMessageId != ReplyMessage->MessageId) ||
+ if ((WakeupThread->LpcReplyMessageId != CapturedReplyMessage.MessageId) ||
((LpcpGetMessageFromThread(WakeupThread)) &&
(LpcpGetMessageType(&LpcpGetMessageFromThread(WakeupThread)-> Request)
!= LPC_REQUEST)))
@@ -290,7 +293,7 @@
_SEH2_TRY
{
LpcpMoveMessage(&Message->Request,
- ReplyMessage,
+ &CapturedReplyMessage,
ReplyMessage + 1,
LPC_REPLY,
NULL);
@@ -324,7 +327,7 @@
/* Check if this is the message the thread had received */
if ((Thread->LpcReceivedMsgIdValid) &&
- (Thread->LpcReceivedMessageId == ReplyMessage->MessageId))
+ (Thread->LpcReceivedMessageId == CapturedReplyMessage.MessageId))
{
/* Clear this data */
Thread->LpcReceivedMessageId = 0;
@@ -333,9 +336,9 @@
/* Free any data information */
LpcpFreeDataInfoMessage(Port,
- ReplyMessage->MessageId,
- ReplyMessage->CallbackId,
- ReplyMessage->ClientId);
+ CapturedReplyMessage.MessageId,
+ CapturedReplyMessage.CallbackId,
+ CapturedReplyMessage.ClientId);
/* Release the lock and release the LPC semaphore to wake up waiters */
KeReleaseGuardedMutex(&LpcpLock);
@@ -362,7 +365,7 @@
{
NTSTATUS Status;
KPROCESSOR_MODE PreviousMode = KeGetPreviousMode(), WaitMode = PreviousMode;
- // PORT_MESSAGE CapturedReplyMessage;
+ PORT_MESSAGE CapturedReplyMessage;
LARGE_INTEGER CapturedTimeout;
PLPCP_PORT_OBJECT Port, ReceivePort, ConnectionPort = NULL;
PLPCP_MESSAGE Message;
@@ -378,30 +381,29 @@
ReceiveMessage,
PortContext);
- if (KeGetPreviousMode() == UserMode)
+ /* Check if the call comes from user mode */
+ if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
+ if (PortContext != NULL)
+ ProbeForWritePointer(PortContext);
+
if (ReplyMessage != NULL)
{
- ProbeForRead(ReplyMessage, sizeof(PORT_MESSAGE), sizeof(ULONG));
- /*RtlCopyMemory(&CapturedReplyMessage, ReplyMessage,
sizeof(PORT_MESSAGE));
- ReplyMessage = &CapturedReplyMessage;*/
+ ProbeForRead(ReplyMessage, sizeof(*ReplyMessage), sizeof(ULONG));
+ CapturedReplyMessage = *(volatile PORT_MESSAGE*)ReplyMessage;
}
if (Timeout != NULL)
{
ProbeForReadLargeInteger(Timeout);
- RtlCopyMemory(&CapturedTimeout, Timeout, sizeof(LARGE_INTEGER));
+ CapturedTimeout = *(volatile LARGE_INTEGER*)Timeout;
Timeout = &CapturedTimeout;
}
-
- if (PortContext != NULL)
- ProbeForWritePointer(PortContext);
- }
- _SEH2_EXCEPT(ExSystemExceptionFilter())
- {
- DPRINT1("SEH crash [1]\n");
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
@@ -410,21 +412,24 @@
{
/* If this is a system thread, then let it page out its stack */
if (Thread->SystemThread) WaitMode = UserMode;
+
+ if (ReplyMessage != NULL)
+ CapturedReplyMessage = *ReplyMessage;
}
/* Check if caller has a reply message */
if (ReplyMessage)
{
/* Validate its length */
- if (((ULONG)ReplyMessage->u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
- (ULONG)ReplyMessage->u1.s1.TotalLength)
+ if (((ULONG)CapturedReplyMessage.u1.s1.DataLength + sizeof(PORT_MESSAGE)) >
+ (ULONG)CapturedReplyMessage.u1.s1.TotalLength)
{
/* Fail */
return STATUS_INVALID_PARAMETER;
}
/* Make sure it has a valid ID */
- if (!ReplyMessage->MessageId) return STATUS_INVALID_PARAMETER;
+ if (!CapturedReplyMessage.MessageId) return STATUS_INVALID_PARAMETER;
}
/* Get the Port object */
@@ -440,9 +445,9 @@
if (ReplyMessage)
{
/* Validate its length in respect to the port object */
- if (((ULONG)ReplyMessage->u1.s1.TotalLength > Port->MaxMessageLength) ||
- ((ULONG)ReplyMessage->u1.s1.TotalLength <=
- (ULONG)ReplyMessage->u1.s1.DataLength))
+ if (((ULONG)CapturedReplyMessage.u1.s1.TotalLength >
Port->MaxMessageLength) ||
+ ((ULONG)CapturedReplyMessage.u1.s1.TotalLength <=
+ (ULONG)CapturedReplyMessage.u1.s1.DataLength))
{
/* Too large, fail */
ObDereferenceObject(Port);
@@ -490,7 +495,7 @@
if (ReplyMessage)
{
/* Get the ETHREAD corresponding to it */
- Status = PsLookupProcessThreadByCid(&ReplyMessage->ClientId,
+ Status = PsLookupProcessThreadByCid(&CapturedReplyMessage.ClientId,
NULL,
&WakeupThread);
if (!NT_SUCCESS(Status))
@@ -516,7 +521,7 @@
KeAcquireGuardedMutex(&LpcpLock);
/* Make sure this is the reply the thread is waiting for */
- if ((WakeupThread->LpcReplyMessageId != ReplyMessage->MessageId) ||
+ if ((WakeupThread->LpcReplyMessageId != CapturedReplyMessage.MessageId) ||
((LpcpGetMessageFromThread(WakeupThread)) &&
(LpcpGetMessageType(&LpcpGetMessageFromThread(WakeupThread)->Request)
!= LPC_REQUEST)))
@@ -530,11 +535,24 @@
}
/* Copy the message */
- LpcpMoveMessage(&Message->Request,
- ReplyMessage,
- ReplyMessage + 1,
- LPC_REPLY,
- NULL);
+ _SEH2_TRY
+ {
+ LpcpMoveMessage(&Message->Request,
+ &CapturedReplyMessage,
+ ReplyMessage + 1,
+ LPC_REPLY,
+ NULL);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ /* Cleanup and return the exception code */
+ LpcpFreeToPortZone(Message, LPCP_LOCK_HELD | LPCP_LOCK_RELEASE);
+ if (ConnectionPort) ObDereferenceObject(ConnectionPort);
+ ObDereferenceObject(WakeupThread);
+ ObDereferenceObject(Port);
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
/* Reference the thread while we use it */
ObReferenceObject(WakeupThread);
@@ -555,7 +573,7 @@
/* Check if this is the message the thread had received */
if ((Thread->LpcReceivedMsgIdValid) &&
- (Thread->LpcReceivedMessageId == ReplyMessage->MessageId))
+ (Thread->LpcReceivedMessageId == CapturedReplyMessage.MessageId))
{
/* Clear this data */
Thread->LpcReceivedMessageId = 0;
@@ -564,9 +582,9 @@
/* Free any data information */
LpcpFreeDataInfoMessage(Port,
- ReplyMessage->MessageId,
- ReplyMessage->CallbackId,
- ReplyMessage->ClientId);
+ CapturedReplyMessage.MessageId,
+ CapturedReplyMessage.CallbackId,
+ CapturedReplyMessage.ClientId);
/* Release the lock and release the LPC semaphore to wake up waiters */
KeReleaseGuardedMutex(&LpcpLock);
@@ -688,9 +706,8 @@
ASSERT(FALSE);
}
}
- _SEH2_EXCEPT(ExSystemExceptionFilter())
- {
- DPRINT1("SEH crash [2]\n");
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
@@ -771,25 +788,23 @@
PAGED_CODE();
- /* Check the previous mode */
- PreviousMode = ExGetPreviousMode();
- if (PreviousMode == KernelMode)
+ /* Check if the call comes from user mode */
+ if (PreviousMode != KernelMode)
+ {
+ _SEH2_TRY
+ {
+ ProbeForRead(Message, sizeof(*Message), sizeof(PVOID));
+ CapturedMessage = *(volatile PORT_MESSAGE*)Message;
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
+ }
+ else
{
CapturedMessage = *Message;
- }
- else
- {
- _SEH2_TRY
- {
- ProbeForRead(Message, sizeof(*Message), sizeof(PVOID));
- CapturedMessage = *Message;
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- DPRINT1("Got exception!\n");
- _SEH2_YIELD(return _SEH2_GetExceptionCode());
- }
- _SEH2_END;
}
/* Make sure there is any data to copy */
Modified: trunk/reactos/ntoskrnl/lpc/send.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/lpc/send.c?rev=73…
==============================================================================
--- trunk/reactos/ntoskrnl/lpc/send.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/lpc/send.c [iso-8859-1] Mon Nov 7 01:24:24 2016
@@ -461,9 +461,8 @@
_SEH2_TRY
{
/* Probe and capture the LpcRequest */
- ProbeForRead(LpcRequest, sizeof(PORT_MESSAGE), sizeof(ULONG));
- ProbeForRead(LpcRequest, LpcRequest->u1.s1.TotalLength, sizeof(ULONG));
- CapturedLpcRequest = *LpcRequest;
+ ProbeForRead(LpcRequest, sizeof(*LpcRequest), sizeof(ULONG));
+ CapturedLpcRequest = *(volatile PORT_MESSAGE*)LpcRequest;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
@@ -523,7 +522,7 @@
{
/* Copy it */
LpcpMoveMessage(&Message->Request,
- LpcRequest,
+ &CapturedLpcRequest,
LpcRequest + 1,
MessageType,
&Thread->Cid);
@@ -725,10 +724,9 @@
{
_SEH2_TRY
{
- /* Probe the full request message and copy the base structure */
+ /* Probe and capture the LpcRequest */
ProbeForRead(LpcRequest, sizeof(*LpcRequest), sizeof(ULONG));
- ProbeForRead(LpcRequest, LpcRequest->u1.s1.TotalLength, sizeof(ULONG));
- CapturedLpcRequest = *LpcRequest;
+ CapturedLpcRequest = *(volatile PORT_MESSAGE*)LpcRequest;
/* Probe the reply message for write */
ProbeForWrite(LpcReply, sizeof(*LpcReply), sizeof(ULONG));