[aandrejevic] 63331: [NTVDM] DosResizeMemory shouldn't succeed unless the memory block has been resized to the specified amount.

Author: aandrejevic
Date: Sat May 17 15:29:07 2014
New Revision: 63331

URL: http://svn.reactos.org/svn/reactos?rev=63331&view=rev
Log:
[NTVDM]
DosResizeMemory shouldn't succeed unless the memory block has been resized to the
specified amount.


Modified:
    trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c

Modified: trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/dos/dos32…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/dos/dos32krnl/dos.c	[iso-8859-1] Sat May 17 15:29:07
2014
@@ -248,6 +248,14 @@
 
         /* Set the maximum possible size of the block */
         ReturnSize += NextMcb->Size + 1;
+
+        if (ReturnSize < NewSize)
+        {
+            DPRINT("Cannot expand memory block: insufficient free segments
available!\n");
+            DosLastError = ERROR_NOT_ENOUGH_MEMORY;
+            Success = FALSE;
+            goto Done;
+        }
 
         /* Maximize the current block */
         Mcb->Size = ReturnSize;