[tfaber] 73835: [LOCALMON] - Avoid a potential double free in InitializePrintMonitor2. CID 1401299 - Avoid a use after free in LocalmonClosePort. CID 1401298

Author: tfaber
Date: Sun Feb 19 10:31:37 2017
New Revision: 73835

URL: http://svn.reactos.org/svn/reactos?rev=73835&view=rev
Log:
[LOCALMON]
- Avoid a potential double free in InitializePrintMonitor2. CID 1401299
- Avoid a use after free in LocalmonClosePort. CID 1401298

Modified:
    trunk/reactos/win32ss/printing/monitors/localmon/main.c
    trunk/reactos/win32ss/printing/monitors/localmon/ports.c

Modified: trunk/reactos/win32ss/printing/monitors/localmon/main.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/printing/monitors/l...
==============================================================================
--- trunk/reactos/win32ss/printing/monitors/localmon/main.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/printing/monitors/localmon/main.c	[iso-8859-1] Sun Feb 19 10:31:37 2017
@@ -223,6 +223,7 @@
         if (!cchPortName || _IsNEPort(pPort->pwszPortName))
         {
             DllFreeSplMem(pPort);
+            pPort = NULL;
             continue;
         }

Modified: trunk/reactos/win32ss/printing/monitors/localmon/ports.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/printing/monitors/l...
==============================================================================
--- trunk/reactos/win32ss/printing/monitors/localmon/ports.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/printing/monitors/localmon/ports.c	[iso-8859-1] Sun Feb 19 10:31:37 2017
@@ -541,8 +541,8 @@
     {
         EnterCriticalSection(&pPort->pLocalmon->Section);
         RemoveEntryList(&pPort->Entry);
+        LeaveCriticalSection(&pPort->pLocalmon->Section);
         DllFreeSplMem(pPort);
-        LeaveCriticalSection(&pPort->pLocalmon->Section);
     }

SetLastError(ERROR_SUCCESS);