From 5a1de25f17cfd33dbde4228e57f8e1a4af1fffe1 Mon Sep 17 00:00:00 2001
From: Thomas Faber <thomas.faber@reactos.org>
Date: Sun, 8 Feb 2015 14:15:45 +0000
Subject: [PATCH] [NTOS] - Avoid removing list entry if the list is empty in
 IopUnQueueIrpFromThread CORE-8419

svn path=/trunk/; revision=66207
---
 reactos/ntoskrnl/include/internal/io_x.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/reactos/ntoskrnl/include/internal/io_x.h b/reactos/ntoskrnl/include/internal/io_x.h
index e5d437c5955..d663b760c00 100644
--- a/reactos/ntoskrnl/include/internal/io_x.h
+++ b/reactos/ntoskrnl/include/internal/io_x.h
@@ -51,6 +51,8 @@ VOID
 IopUnQueueIrpFromThread(IN PIRP Irp)
 {
     /* Remove it from the list and reset it */
+    if (IsListEmpty(&Irp->ThreadListEntry))
+        return;
     RemoveEntryList(&Irp->ThreadListEntry);
     InitializeListHead(&Irp->ThreadListEntry);
 }