[fireball] 50108: [NTOS] - Fix memory region size calculation in MemoryBasicInformation in certain cases. Spotted by Michael Martin.

Author: fireball
Date: Wed Dec 22 21:59:27 2010
New Revision: 50108

URL: http://svn.reactos.org/svn/reactos?rev=50108&view=rev
Log:
[NTOS]
- Fix memory region size calculation in MemoryBasicInformation in certain cases. Spotted
by Michael Martin.

Modified:
    trunk/reactos/ntoskrnl/mm/ARM3/virtual.c

Modified: trunk/reactos/ntoskrnl/mm/ARM3/virtual.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/ARM3/virtual.c…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/ARM3/virtual.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/ARM3/virtual.c [iso-8859-1] Wed Dec 22 21:59:27 2010
@@ -2446,6 +2446,9 @@
             /* Check if this VAD is too high */
             if (BaseVpn < Vad->StartingVpn)
             {
+                /* Stop if there is no left child */
+                if (!Vad->LeftChild) break;
+
                 /* Search on the left next */
                 Vad = Vad->LeftChild;
             }
@@ -2453,6 +2456,11 @@
             {
                 /* Then this VAD is too low, keep searching on the right */
                 ASSERT(BaseVpn > Vad->EndingVpn);
+
+                /* Stop if there is no right child */
+                if (!Vad->LeftChild) break;
+
+                /* Search on the right next */
                 Vad = Vad->RightChild;
             }
         }