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reactos/base/system/smss/smsubsys.c
Hermès Bélusca-Maïto 2dddbd5c54
[SMSS] Fix three SmpLoadSubSystem bugs related to the SB_CREATE_SESSION callback. 
This fixes starting the Windows 2000 POSIX subsystem in ReactOS.

- The CreateSession pointer was initialized against the SbApiMsg variable, but
  it was the other SbApiMsg2 that was being initialized and sent through LPC.

- Do not overwrite the MuSessionId (Terminal Services session ID) variable with
  the generated environment subsystem session ID from SmpAllocateSessionId().

- Actually initialize the SbApiMsg ApiNumber for the CreateSession LPC call.

(dll\win32\kernel32\client\proc.c:3690) Retrying with: POSIX /P C:\ReactOS\system32\posix\ls.exe /C ls
Breakpoint 1 hit
csrsrv!CsrSbApiRequestThread+0x64:
001b:1000ac34 837dfc00        cmp     dword ptr [ebp-4],0
kd> ??ReceiveMsg
struct _SB_API_MSG
   +0x000 h                : _PORT_MESSAGE
   +0x018 ConnectionInfo   : _SB_CONNECTION_INFO
   +0x018 ApiNumber        : 0xcccccccc (No matching name)
   +0x01c ReturnValue      : 0n0
   +0x020 u                : <unnamed-tag>
kd> p
...
(base\system\smss\smsubsys.c:393) SMSS: SmpLoadSubSystem - NtRequestWaitReplyPort Failed with  Status c0000002 for sessionid 2
...
<Retrying>
...
(base\system\smss\smsubsys.c:393) SMSS: SmpLoadSubSystem - NtRequestWaitReplyPort Failed with  Status c0000002 for sessionid 3

All those bugs could have been avoided *IF*, rather than (badly) duplicating
its code, the existing SmpSbCreateSession() function had been used instead.

- "Not sure these field mean what I think they do -- but clear them" ... ◔_◔
  Those fields are related to the debug client interface (DbgUi) and session
  in case the subsystem being started is going to be debugged. These have
  nothing to do with the MuSessionId. Clarify this in the SB_CREATE_SESSION_MSG
  structure and in the SmpSbCreateSession() function.
2022-11-14 00:10:35 +01:00

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/*
* PROJECT: ReactOS Windows-Compatible Session Manager
* LICENSE: BSD 2-Clause License
* FILE: base/system/smss/smsubsys.c
* PURPOSE: Main SMSS Code
* PROGRAMMERS: Alex Ionescu
*/
/* INCLUDES *******************************************************************/
#include "smss.h"
#define NDEBUG
#include <debug.h>
/* GLOBALS ********************************************************************/
RTL_CRITICAL_SECTION SmpKnownSubSysLock;
LIST_ENTRY SmpKnownSubSysHead;
HANDLE SmpWindowsSubSysProcess;
HANDLE SmpWindowsSubSysProcessId;
BOOLEAN RegPosixSingleInstance;
WCHAR InitialCommandBuffer[256];
/* FUNCTIONS ******************************************************************/
NTSTATUS
NTAPI
SmpCallCsrCreateProcess(IN PSB_API_MSG SbApiMsg,
IN USHORT MessageLength,
IN HANDLE PortHandle)
{
NTSTATUS Status;
/* Initialize the header and send the message to CSRSS */
SbApiMsg->h.u2.ZeroInit = 0;
SbApiMsg->h.u1.s1.DataLength = MessageLength + 8;
SbApiMsg->h.u1.s1.TotalLength = sizeof(SB_API_MSG);
SbApiMsg->ApiNumber = SbpCreateProcess;
Status = NtRequestWaitReplyPort(PortHandle, &SbApiMsg->h, &SbApiMsg->h);
if (NT_SUCCESS(Status)) Status = SbApiMsg->ReturnValue;
return Status;
}
VOID
NTAPI
SmpDereferenceSubsystem(IN PSMP_SUBSYSTEM SubSystem)
{
/* Acquire the database lock while we (potentially) destroy this subsystem */
RtlEnterCriticalSection(&SmpKnownSubSysLock);
/* Drop the reference and see if it's terminating */
if (!(--SubSystem->ReferenceCount) && (SubSystem->Terminating))
{
/* Close all handles and free it */
if (SubSystem->Event) NtClose(SubSystem->Event);
if (SubSystem->ProcessHandle) NtClose(SubSystem->ProcessHandle);
if (SubSystem->SbApiPort) NtClose(SubSystem->SbApiPort);
RtlFreeHeap(SmpHeap, 0, SubSystem);
}
/* Release the database lock */
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
}
PSMP_SUBSYSTEM
NTAPI
SmpLocateKnownSubSysByCid(IN PCLIENT_ID ClientId)
{
PSMP_SUBSYSTEM Subsystem = NULL;
PLIST_ENTRY NextEntry;
/* Lock the subsystem database */
RtlEnterCriticalSection(&SmpKnownSubSysLock);
/* Loop each subsystem in the database */
NextEntry = SmpKnownSubSysHead.Flink;
while (NextEntry != &SmpKnownSubSysHead)
{
/* Check if this one matches the client ID and is still valid */
Subsystem = CONTAINING_RECORD(NextEntry, SMP_SUBSYSTEM, Entry);
if ((*(PULONGLONG)&Subsystem->ClientId == *(PULONGLONG)ClientId) &&
!(Subsystem->Terminating))
{
/* Add a reference and return it */
Subsystem->ReferenceCount++;
break;
}
/* Reset the current pointer and keep searching */
Subsystem = NULL;
NextEntry = NextEntry->Flink;
}
/* Release the lock and return the subsystem we found */
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
return Subsystem;
}
PSMP_SUBSYSTEM
NTAPI
SmpLocateKnownSubSysByType(IN ULONG MuSessionId,
IN ULONG ImageType)
{
PSMP_SUBSYSTEM Subsystem = NULL;
PLIST_ENTRY NextEntry;
/* Lock the subsystem database */
RtlEnterCriticalSection(&SmpKnownSubSysLock);
/* Loop each subsystem in the database */
NextEntry = SmpKnownSubSysHead.Flink;
while (NextEntry != &SmpKnownSubSysHead)
{
/* Check if this one matches the image and uID, and is still valid */
Subsystem = CONTAINING_RECORD(NextEntry, SMP_SUBSYSTEM, Entry);
if ((Subsystem->ImageType == ImageType) &&
!(Subsystem->Terminating) &&
(Subsystem->MuSessionId == MuSessionId))
{
/* Return it referenced for the caller */
Subsystem->ReferenceCount++;
break;
}
/* Reset the current pointer and keep searching */
Subsystem = NULL;
NextEntry = NextEntry->Flink;
}
/* Release the lock and return the subsystem we found */
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
return Subsystem;
}
NTSTATUS
NTAPI
SmpLoadSubSystem(IN PUNICODE_STRING FileName,
IN PUNICODE_STRING Directory,
IN PUNICODE_STRING CommandLine,
IN ULONG MuSessionId,
OUT PHANDLE ProcessId,
IN ULONG Flags)
{
PSMP_SUBSYSTEM Subsystem, NewSubsystem, KnownSubsystem = NULL;
HANDLE SubSysProcessId;
NTSTATUS Status = STATUS_SUCCESS;
SB_API_MSG SbApiMsg;
RTL_USER_PROCESS_INFORMATION ProcessInformation;
LARGE_INTEGER Timeout;
PVOID State;
PSB_CREATE_PROCESS_MSG CreateProcess = &SbApiMsg.u.CreateProcess;
PSB_CREATE_SESSION_MSG CreateSession = &SbApiMsg.u.CreateSession;
/* Make sure this is a found subsystem */
if (Flags & SMP_INVALID_PATH)
{
DPRINT1("SMSS: Unable to find subsystem - %wZ\n", FileName);
return STATUS_OBJECT_NAME_NOT_FOUND;
}
/* Don't use a session if the flag is set */
if (Flags & 0x80) MuSessionId = 0;
/* Lock the subsystems while we do a look up */
RtlEnterCriticalSection(&SmpKnownSubSysLock);
while (TRUE)
{
/* Check if we found a subsystem not yet fully initialized */
Subsystem = SmpLocateKnownSubSysByType(MuSessionId, -1);
if (!Subsystem) break;
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
/* Wait on it to initialize */
NtWaitForSingleObject(Subsystem->Event, FALSE, NULL);
/* Dereference it and try the next one */
RtlEnterCriticalSection(&SmpKnownSubSysLock);
SmpDereferenceSubsystem(Subsystem);
}
/* Check if this is a POSIX subsystem */
if (Flags & SMP_POSIX_FLAG)
{
/* Do we already have it? */
Subsystem = SmpLocateKnownSubSysByType(MuSessionId, IMAGE_SUBSYSTEM_POSIX_CUI);
}
else if (Flags & SMP_OS2_FLAG)
{
/* This is an OS/2 subsystem, do we we already have it? */
Subsystem = SmpLocateKnownSubSysByType(MuSessionId, IMAGE_SUBSYSTEM_OS2_CUI);
}
/* Check if we already have one of the optional subsystems for the session */
if (Subsystem)
{
/* Dereference and return, no work to do */
SmpDereferenceSubsystem(Subsystem);
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
return STATUS_SUCCESS;
}
/* Allocate a new subsystem! */
NewSubsystem = RtlAllocateHeap(SmpHeap, SmBaseTag, sizeof(SMP_SUBSYSTEM));
if (!NewSubsystem)
{
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
return STATUS_NO_MEMORY;
}
/* Initialize its header and reference count */
NewSubsystem->ReferenceCount = 1;
NewSubsystem->MuSessionId = MuSessionId;
NewSubsystem->ImageType = -1;
/* Clear out all the other data for now */
NewSubsystem->Terminating = FALSE;
NewSubsystem->ProcessHandle = NULL;
NewSubsystem->Event = NULL;
NewSubsystem->PortHandle = NULL;
NewSubsystem->SbApiPort = NULL;
/* Create the event we'll be waiting on for initialization */
Status = NtCreateEvent(&NewSubsystem->Event,
EVENT_ALL_ACCESS,
NULL,
NotificationEvent,
FALSE);
if (!NT_SUCCESS(Status))
{
/* This failed, bail out */
RtlFreeHeap(SmpHeap, 0, NewSubsystem);
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
return STATUS_NO_MEMORY;
}
/* Insert the subsystem and release the lock. It can now be found */
InsertTailList(&SmpKnownSubSysHead, &NewSubsystem->Entry);
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
/* The OS/2 and POSIX subsystems are actually Windows applications! */
if (Flags & (SMP_POSIX_FLAG | SMP_OS2_FLAG))
{
/* Locate the Windows subsystem for this session */
KnownSubsystem = SmpLocateKnownSubSysByType(MuSessionId,
IMAGE_SUBSYSTEM_WINDOWS_GUI);
if (!KnownSubsystem)
{
DPRINT1("SMSS: SmpLoadSubSystem - SmpLocateKnownSubSysByType Failed\n");
goto Quickie2;
}
/* Fill out all the process details and call CSRSS to launch it */
CreateProcess->In.ImageName = FileName;
CreateProcess->In.CurrentDirectory = Directory;
CreateProcess->In.CommandLine = CommandLine;
CreateProcess->In.DllPath = SmpDefaultLibPath.Length ?
&SmpDefaultLibPath : NULL;
CreateProcess->In.Flags = Flags | SMP_DEFERRED_FLAG;
CreateProcess->In.DebugFlags = SmpDebug;
Status = SmpCallCsrCreateProcess(&SbApiMsg,
sizeof(*CreateProcess),
KnownSubsystem->SbApiPort);
if (!NT_SUCCESS(Status))
{
/* Handle failures */
DPRINT1("SMSS: SmpLoadSubSystem - SmpCallCsrCreateProcess Failed with Status %lx\n",
Status);
goto Quickie2;
}
/* Save the process information we'll need for the create session */
ProcessInformation.ProcessHandle = CreateProcess->Out.ProcessHandle;
ProcessInformation.ThreadHandle = CreateProcess->Out.ThreadHandle;
ProcessInformation.ClientId = CreateProcess->Out.ClientId;
ProcessInformation.ImageInformation.SubSystemType = CreateProcess->Out.SubsystemType;
}
else
{
/* This must be CSRSS itself, so just launch it and that's it */
Status = SmpExecuteImage(FileName,
Directory,
CommandLine,
MuSessionId,
Flags | SMP_DEFERRED_FLAG,
&ProcessInformation);
if (!NT_SUCCESS(Status))
{
/* Handle failures */
DPRINT1("SMSS: SmpLoadSubSystem - SmpExecuteImage Failed with Status %lx\n",
Status);
goto Quickie2;
}
}
/* Fill out the handle and client ID in the subsystem structure now */
NewSubsystem->ProcessHandle = ProcessInformation.ProcessHandle;
NewSubsystem->ClientId = ProcessInformation.ClientId;
/* Check if we launched a native image or a subsystem-backed image */
if (ProcessInformation.ImageInformation.SubSystemType == IMAGE_SUBSYSTEM_NATIVE)
{
/* This must be CSRSS itself, since it's a native subsystem image */
SubSysProcessId = ProcessInformation.ClientId.UniqueProcess;
if ((ProcessId) && !(*ProcessId)) *ProcessId = SubSysProcessId;
/* Was this the initial CSRSS on Session 0? */
if (!MuSessionId)
{
/* Then save it in the global variables */
SmpWindowsSubSysProcessId = SubSysProcessId;
SmpWindowsSubSysProcess = ProcessInformation.ProcessHandle;
}
ASSERT(NT_SUCCESS(Status));
}
else
{
/* This is the POSIX or OS/2 subsystem process, copy its information */
CreateSession->ProcessInfo = ProcessInformation;
CreateSession->DbgSessionId = 0;
*(PULONGLONG)&CreateSession->DbgUiClientId = 0;
/* This should find CSRSS because they are POSIX or OS/2 subsystems */
Subsystem = SmpLocateKnownSubSysByType(MuSessionId,
ProcessInformation.ImageInformation.SubSystemType);
if (!Subsystem)
{
/* Odd failure -- but handle it anyway */
Status = STATUS_NO_SUCH_PACKAGE;
DPRINT1("SMSS: SmpLoadSubSystem - SmpLocateKnownSubSysByType Failed with Status %lx for sessionid %lu\n",
Status,
MuSessionId);
goto Quickie;
}
/* Duplicate the parent process handle for the subsystem to have */
Status = NtDuplicateObject(NtCurrentProcess(),
ProcessInformation.ProcessHandle,
Subsystem->ProcessHandle,
&CreateSession->ProcessInfo.ProcessHandle,
PROCESS_ALL_ACCESS,
0,
0);
if (!NT_SUCCESS(Status))
{
/* Fail since this is critical */
DPRINT1("SMSS: SmpLoadSubSystem - NtDuplicateObject Failed with Status %lx for sessionid %lu\n",
Status,
MuSessionId);
goto Quickie;
}
/* Duplicate the initial thread handle for the subsystem to have */
Status = NtDuplicateObject(NtCurrentProcess(),
ProcessInformation.ThreadHandle,
Subsystem->ProcessHandle,
&CreateSession->ProcessInfo.ThreadHandle,
THREAD_ALL_ACCESS,
0,
0);
if (!NT_SUCCESS(Status))
{
/* Fail since this is critical */
DPRINT1("SMSS: SmpLoadSubSystem - NtDuplicateObject Failed with Status %lx for sessionid %lu\n",
Status,
MuSessionId);
goto Quickie;
}
/* Allocate an internal Session ID for this subsystem */
CreateSession->SessionId = SmpAllocateSessionId(Subsystem, NULL);
/* Send the create session message to the subsystem */
SbApiMsg.ReturnValue = STATUS_SUCCESS;
SbApiMsg.h.u2.ZeroInit = 0;
SbApiMsg.h.u1.s1.DataLength = sizeof(SB_CREATE_SESSION_MSG) + 8;
SbApiMsg.h.u1.s1.TotalLength = sizeof(SB_API_MSG);
SbApiMsg.ApiNumber = SbpCreateSession;
Status = NtRequestWaitReplyPort(Subsystem->SbApiPort,
&SbApiMsg.h,
&SbApiMsg.h);
if (NT_SUCCESS(Status)) Status = SbApiMsg.ReturnValue;
if (!NT_SUCCESS(Status))
{
/* Delete the session and handle failure if the LPC call failed */
SmpDeleteSession(CreateSession->SessionId);
DPRINT1("SMSS: SmpLoadSubSystem - NtRequestWaitReplyPort Failed with Status %lx for sessionid %lu\n",
Status,
MuSessionId);
goto Quickie;
}
}
/* Okay, everything looks good to go, initialize this subsystem now! */
Status = NtResumeThread(ProcessInformation.ThreadHandle, NULL);
if (!NT_SUCCESS(Status))
{
/* That didn't work -- back out of everything */
DPRINT1("SMSS: SmpLoadSubSystem - NtResumeThread failed Status %lx\n", Status);
goto Quickie;
}
/* Check if this was the subsystem for a different session */
if (MuSessionId)
{
/* Wait up to 60 seconds for it to initialize */
Timeout.QuadPart = -600000000;
Status = NtWaitForSingleObject(NewSubsystem->Event, FALSE, &Timeout);
/* Timeout is done -- does this session still exist? */
if (!SmpCheckDuplicateMuSessionId(MuSessionId))
{
/* Nope, it died. Cleanup should've ocurred in a different path. */
DPRINT1("SMSS: SmpLoadSubSystem - session deleted\n");
return STATUS_DELETE_PENDING;
}
/* Check if we timed our or there was another error with the wait */
if (Status != STATUS_WAIT_0)
{
/* Something is wrong with the subsystem, so back out of everything */
DPRINT1("SMSS: SmpLoadSubSystem - Timeout waiting for subsystem connect with Status %lx for sessionid %lu\n",
Status,
MuSessionId);
goto Quickie;
}
}
else
{
/* This a session 0 subsystem, just wait for it to initialize */
NtWaitForSingleObject(NewSubsystem->Event, FALSE, NULL);
}
/* Subsystem is created, resumed, and initialized. Close handles and exit */
NtClose(ProcessInformation.ThreadHandle);
Status = STATUS_SUCCESS;
goto Quickie2;
Quickie:
/* This is the failure path. First check if we need to detach from session */
if ((AttachedSessionId == -1) || (Flags & (SMP_POSIX_FLAG | SMP_OS2_FLAG)))
{
/* We were not attached, or did not launch subsystems that required it */
DPRINT1("SMSS: Did not detach from Session Space: SessionId=%x Flags=%x Status=%x\n",
AttachedSessionId,
Flags | SMP_DEFERRED_FLAG,
Status);
}
else
{
/* Get the privilege we need for detachment */
Status = SmpAcquirePrivilege(SE_LOAD_DRIVER_PRIVILEGE, &State);
if (!NT_SUCCESS(Status))
{
/* We can't detach without it */
DPRINT1("SMSS: Did not detach from Session Space: SessionId=%x Flags=%x Status=%x\n",
AttachedSessionId,
Flags | SMP_DEFERRED_FLAG,
Status);
}
else
{
/* Now detach from the session */
Status = NtSetSystemInformation(SystemSessionDetach,
&AttachedSessionId,
sizeof(AttachedSessionId));
if (!NT_SUCCESS(Status))
{
/* Failed to detach. Note the DPRINT1 has a typo in Windows */
DPRINT1("SMSS: SmpStartCsr, Couldn't Detach from Session Space. Status=%x\n", Status);
ASSERT(NT_SUCCESS(Status));
}
else
{
/* Detachment worked, reset our attached session ID */
AttachedSessionId = -1;
}
/* And release the privilege we acquired */
SmpReleasePrivilege(State);
}
}
/* Since this is the failure path, terminate the subsystem process */
NtTerminateProcess(ProcessInformation.ProcessHandle, Status);
NtClose(ProcessInformation.ThreadHandle);
Quickie2:
/* This is the cleanup path -- first dereference our subsystems */
RtlEnterCriticalSection(&SmpKnownSubSysLock);
if (Subsystem) SmpDereferenceSubsystem(Subsystem);
if (KnownSubsystem) SmpDereferenceSubsystem(KnownSubsystem);
/* In the failure case, destroy the new subsystem we just created */
if (!NT_SUCCESS(Status))
{
RemoveEntryList(&NewSubsystem->Entry);
NtSetEvent(NewSubsystem->Event, NULL);
SmpDereferenceSubsystem(NewSubsystem);
}
/* Finally, we're all done! */
RtlLeaveCriticalSection(&SmpKnownSubSysLock);
return Status;
}
NTSTATUS
NTAPI
SmpLoadSubSystemsForMuSession(IN PULONG MuSessionId,
OUT PHANDLE ProcessId,
IN PUNICODE_STRING InitialCommand)
{
NTSTATUS Status = STATUS_SUCCESS, Status2;
PSMP_REGISTRY_VALUE RegEntry;
UNICODE_STRING DestinationString, NtPath;
PLIST_ENTRY NextEntry;
LARGE_INTEGER Timeout;
PVOID State;
/* Write a few last registry keys with the boot partition information */
SmpTranslateSystemPartitionInformation();
/* Process "SetupExecute" values */
NextEntry = SmpSetupExecuteList.Flink;
while (NextEntry != &SmpSetupExecuteList)
{
/* Execute each one and move on */
RegEntry = CONTAINING_RECORD(NextEntry, SMP_REGISTRY_VALUE, Entry);
SmpExecuteCommand(&RegEntry->Name, 0, NULL, 0);
NextEntry = NextEntry->Flink;
}
/* Now process the subsystems */
NextEntry = SmpSubSystemList.Flink;
while (NextEntry != &SmpSubSystemList)
{
/* Get the entry and check if this is the special Win32k entry */
RegEntry = CONTAINING_RECORD(NextEntry, SMP_REGISTRY_VALUE, Entry);
if (_wcsicmp(RegEntry->Name.Buffer, L"Kmode") == 0)
{
/* Translate it */
if (!RtlDosPathNameToNtPathName_U(RegEntry->Value.Buffer,
&NtPath,
NULL,
NULL))
{
Status = STATUS_OBJECT_PATH_SYNTAX_BAD;
DPRINT1("Failed: %lx\n", Status);
}
else
{
/* Get the driver privilege */
Status = SmpAcquirePrivilege(SE_LOAD_DRIVER_PRIVILEGE, &State);
if (NT_SUCCESS(Status))
{
/* Create the new session */
ASSERT(AttachedSessionId == -1);
Status = NtSetSystemInformation(SystemSessionCreate,
MuSessionId,
sizeof(*MuSessionId));
if (!NT_SUCCESS(Status))
{
DPRINT1("SMSS: Session space creation failed\n");
SmpReleasePrivilege(State);
RtlFreeHeap(RtlGetProcessHeap(), 0, NtPath.Buffer);
return Status;
}
AttachedSessionId = *MuSessionId;
/*
* Start Win32k.sys on this session. Use a hardcoded value
* instead of the Kmode one...
*/
RtlInitUnicodeString(&DestinationString,
L"\\SystemRoot\\System32\\win32k.sys");
Status = NtSetSystemInformation(SystemExtendServiceTableInformation,
&DestinationString,
sizeof(DestinationString));
RtlFreeHeap(RtlGetProcessHeap(), 0, NtPath.Buffer);
SmpReleasePrivilege(State);
if (!NT_SUCCESS(Status))
{
DPRINT1("SMSS: Load of WIN32K failed.\n");
return Status;
}
}
}
}
/* Next entry */
NextEntry = NextEntry->Flink;
}
/* Now parse the required subsystem list */
NextEntry = SmpSubSystemsToLoad.Flink;
while (NextEntry != &SmpSubSystemsToLoad)
{
/* Get each entry and check if it's the internal debug or not */
RegEntry = CONTAINING_RECORD(NextEntry, SMP_REGISTRY_VALUE, Entry);
if (_wcsicmp(RegEntry->Name.Buffer, L"Debug") == 0)
{
/* Load the internal debug system */
Status = SmpExecuteCommand(&RegEntry->Value,
*MuSessionId,
ProcessId,
SMP_DEBUG_FLAG | SMP_SUBSYSTEM_FLAG);
}
else
{
/* Load the required subsystem */
Status = SmpExecuteCommand(&RegEntry->Value,
*MuSessionId,
ProcessId,
SMP_SUBSYSTEM_FLAG);
}
if (!NT_SUCCESS(Status))
{
DPRINT1("SMSS: Subsystem execute failed (%wZ)\n", &RegEntry->Value);
return Status;
}
/* Move to the next entry */
NextEntry = NextEntry->Flink;
}
/* Process the "Execute" list now */
NextEntry = SmpExecuteList.Blink;
if (NextEntry != &SmpExecuteList)
{
/* Get the custom initial command */
RegEntry = CONTAINING_RECORD(NextEntry, SMP_REGISTRY_VALUE, Entry);
/* Write the initial command and wait for 5 seconds (why??!) */
*InitialCommand = RegEntry->Name;
Timeout.QuadPart = -50000000;
NtDelayExecution(FALSE, &Timeout);
}
else
{
/* Use the default Winlogon initial command */
RtlInitUnicodeString(InitialCommand, L"winlogon.exe");
InitialCommandBuffer[0] = UNICODE_NULL;
/* Check if there's a debugger for Winlogon */
Status2 = LdrQueryImageFileExecutionOptions(InitialCommand,
L"Debugger",
REG_SZ,
InitialCommandBuffer,
sizeof(InitialCommandBuffer) -
InitialCommand->Length,
NULL);
if ((NT_SUCCESS(Status2)) && (InitialCommandBuffer[0]))
{
/* Put the debugger string with the Winlogon string */
RtlStringCbCatW(InitialCommandBuffer, sizeof(InitialCommandBuffer), L" ");
RtlStringCbCatW(InitialCommandBuffer, sizeof(InitialCommandBuffer), InitialCommand->Buffer);
RtlInitUnicodeString(InitialCommand, InitialCommandBuffer);
}
}
/* Finally check if there was a custom initial command */
NextEntry = SmpExecuteList.Flink;
while (NextEntry != &SmpExecuteList)
{
/* Execute each one */
RegEntry = CONTAINING_RECORD(NextEntry, SMP_REGISTRY_VALUE, Entry);
SmpExecuteCommand(&RegEntry->Name, *MuSessionId, NULL, 0);
NextEntry = NextEntry->Flink;
}
/* Return status */
return Status;
}
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