[cgutman] 48637: [TCPIP] - Don't allocate pool if there is nothing in the route table - Fixes bug 5493

Author: cgutman
Date: Sun Aug 29 02:29:10 2010
New Revision: 48637

URL: http://svn.reactos.org/svn/reactos?rev=48637&view=rev
Log:
[TCPIP]
- Don't allocate pool if there is nothing in the route table
- Fixes bug 5493

Modified:
    trunk/reactos/drivers/network/tcpip/tcpip/ninfo.c

Modified: trunk/reactos/drivers/network/tcpip/tcpip/ninfo.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/tcpip/tcpi…
==============================================================================
--- trunk/reactos/drivers/network/tcpip/tcpip/ninfo.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/tcpip/tcpip/ninfo.c [iso-8859-1] Sun Aug 29 02:29:10
2010
@@ -21,15 +21,21 @@
     KIRQL OldIrql;
     UINT RtCount = CountFIBs(IF);
     UINT Size = sizeof( IPROUTE_ENTRY ) * RtCount;
-    PFIB_ENTRY RCache =
-	ExAllocatePool( NonPagedPool, sizeof( FIB_ENTRY ) * RtCount ),
-	RCacheCur = RCache;
-    PIPROUTE_ENTRY RouteEntries = ExAllocatePool( NonPagedPool, Size ),
-	RtCurrent = RouteEntries;
+    PFIB_ENTRY RCache, RCacheCur;
+    PIPROUTE_ENTRY RouteEntries, RtCurrent;
     UINT i;
 
-    TI_DbgPrint(DEBUG_INFO, ("Called, routes = %d, RCache = %08x\n",
-			    RtCount, RCache));
+    TI_DbgPrint(DEBUG_INFO, ("Called, routes = %d\n",
+			    RtCount));
+    
+    if (RtCount == 0)
+        return InfoCopyOut(NULL, 0, NULL, BufferSize);
+
+    RouteEntries = ExAllocatePool( NonPagedPool, Size );
+    RtCurrent = RouteEntries;
+
+    RCache = ExAllocatePool( NonPagedPool, sizeof( FIB_ENTRY ) * RtCount );
+    RCacheCur = RCache;
 
     if( !RCache || !RouteEntries ) {
 	if( RCache ) ExFreePool( RCache );