From c6ee3e16efc86bcac690e9f243d8fba41c9dcdb0 Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Tue, 12 Nov 2013 19:23:42 +0000
Subject: [PATCH] [NTOSKRNL] Fix freeing of the driver string, this should only
 be done, if the lowest bit is set.

svn path=/trunk/; revision=60965
---
 reactos/ntoskrnl/mm/ARM3/sysldr.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/reactos/ntoskrnl/mm/ARM3/sysldr.c b/reactos/ntoskrnl/mm/ARM3/sysldr.c
index c77cc99bc12..052ff720300 100644
--- a/reactos/ntoskrnl/mm/ARM3/sysldr.c
+++ b/reactos/ntoskrnl/mm/ARM3/sysldr.c
@@ -3214,11 +3214,20 @@ LoaderScan:
                                       &LoadedImports);
     if (!NT_SUCCESS(Status))
     {
+        BOOLEAN NeedToFreeString = FALSE;
+
+        /* If the lowest bit is set to 1, this is a hint that we need to free */
+        if (*(ULONG_PTR*)MissingDriverName & 1)
+        {
+            NeedToFreeString = TRUE;
+            *(ULONG_PTR*)MissingDriverName &= ~1;
+        }
+
         DPRINT1("MiResolveImageReferences failed with status 0x%x\n", Status);
         DPRINT1(" Missing driver '%ws', missing API '%s'\n",
                 MissingDriverName, MissingApiName);
 
-        if (MissingDriverName != NULL)
+        if (NeedToFreeString)
         {
             ExFreePoolWithTag(MissingDriverName, TAG_LDR_WSTR);
         }