[hbirr] 16626: - PsKillMostProcesses must be running in the context of the system process.

- PsKillMostProcesses must be running in the context of the system
process.  
- The thread terminating apc is a special user mode apc.
Modified: trunk/reactos/ntoskrnl/ps/kill.c
  _____

Modified: trunk/reactos/ntoskrnl/ps/kill.c
--- trunk/reactos/ntoskrnl/ps/kill.c	2005-07-17 18:27:46 UTC (rev
16625)
+++ trunk/reactos/ntoskrnl/ps/kill.c	2005-07-17 18:34:23 UTC (rev
16626)
@@ -84,6 +84,8 @@

PLIST_ENTRY current_entry;
     PEPROCESS current;

+    ASSERT(PsGetCurrentProcessId() ==
PsInitialSystemProcess->UniqueProcessId);
+
     /* Acquire the Active Process Lock */
     ExAcquireFastMutex(&PspActiveProcessMutex);

@@ -94,8 +96,7 @@
         current = CONTAINING_RECORD(current_entry, EPROCESS,
ActiveProcessLinks);
         current_entry = current_entry->Flink;

-        if (current->UniqueProcessId !=
PsInitialSystemProcess->UniqueProcessId &&
-            current->UniqueProcessId != PsGetCurrentProcessId())
+        if (current->UniqueProcessId !=
PsInitialSystemProcess->UniqueProcessId)
         {
             /* Terminate all the Threads in this Process */
             PspTerminateProcessThreads(current, STATUS_SUCCESS);
@@ -211,6 +212,7 @@
     PEPROCESS CurrentProcess;
     PTERMINATION_PORT TerminationPort;
     PTEB Teb;
+    KIRQL oldIrql;

DPRINT("PspExitThread(ExitStatus %x), Current: 0x%x\n", ExitStatus,
PsGetCurrentThread());

@@ -321,9 +323,11 @@
     /* If the Processor Control Block's NpxThread points to the current
thread
      * unset it.
      */
+    KeRaiseIrql(DISPATCH_LEVEL, &oldIrql);
     InterlockedCompareExchangePointer(&KeGetCurrentPrcb()->NpxThread,
                                       NULL,
                                       (PKPROCESS)CurrentThread);
+    KeLowerIrql(oldIrql);

/* Rundown Mutexes */
     KeRundownThread();
@@ -398,14 +402,14 @@
     /* Allocate the APC */
     Apc = ExAllocatePoolWithTag(NonPagedPool, sizeof(KAPC),
TAG_TERMINATE_APC);

-    /* Initialize a Kernel Mode APC to Kill the Thread */
+    /* Initialize a User Mode APC to Kill the Thread */
     KeInitializeApc(Apc,
                     &Thread->Tcb,
                     OriginalApcEnvironment,
                     PsExitSpecialApc,
                     NULL,
                     PspExitNormalApc,
-                    KernelMode,
+                    UserMode,
                     (PVOID)ExitStatus);

/* Insert it into the APC Queue */