diff -r 3e88ff8f41d5 -r 9e2d4f7f5028 kernel/eka/kernel/sexec.cpp
--- a/kernel/eka/kernel/sexec.cpp	Wed Sep 01 12:34:56 2010 +0100
+++ b/kernel/eka/kernel/sexec.cpp	Tue Sep 14 23:56:21 2010 +0300
@@ -2198,10 +2198,10 @@
 	__KTRACE_OPT(KBOOT,Kern::Printf("File server thread registered"));
 	DThread* pT = TheCurrentThread;
 	DProcess* pP = pT->iOwningProcess;
+	if (K::TheFileServerProcess && K::TheFileServerProcess!=pP)
+		K::PanicCurrentThread(EAccessDenied);
 	pP->iFlags |= (KThreadFlagProcessCritical | KProcessFlagSystemPermanent);
 	pT->iFlags |= KThreadFlagSystemPermanent;
-	if (K::TheFileServerProcess && K::TheFileServerProcess!=pP)
-		K::PanicCurrentThread(EAccessDenied);
 	K::TheFileServerProcess=pP;
 	K::ThreadEnterCS();
 	pP->SetPriority(EPriorityFileServer);