[PATCH] Fix un-synchronized access to PEPROCESS in QsiSystemProcessInformation(...)

do

        {

            SpiCurrent = (PSYSTEM_PROCESS_INFORMATION) Current;

            if ((Process->ProcessExiting) &&

                (Process->Pcb.Header.SignalState) &&

                !(Process->ActiveThreads) &&

                (IsListEmpty(&Process->Pcb.ThreadListHead)))

            {

                DPRINT1("Process %p (%s:%p) is a zombie\n",

                        Process, Process->ImageFileName, Process->UniqueProcessId);

                CurrentSize = 0;

                ImageNameMaximumLength = 0;

                goto Skip;

            }

/* Check if the thread list is valid */

    if (Thread->ThreadListEntry.Flink)

    {

        /* Lock the thread's process */

        KeEnterCriticalRegion();

        ExAcquirePushLockExclusive(&Process->ProcessLock);

        /* Remove us from the list */

        RemoveEntryList(&Thread->ThreadListEntry);

        /* Release the lock */

        ExReleasePushLockExclusive(&Process->ProcessLock);

        KeLeaveCriticalRegion();

    }