[gadamopoulos] 53732: [win32k] - Fix several issues detected by static code analysis

Author: gadamopoulos
Date: Sun Sep 18 12:33:38 2011
New Revision: 53732

URL: http://svn.reactos.org/svn/reactos?rev=53732&view=rev
Log:
[win32k]
- Fix several issues detected by static code analysis

Modified:
    trunk/reactos/subsystems/win32/win32k/ntuser/message.c
    trunk/reactos/subsystems/win32/win32k/ntuser/window.c
    trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/message.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/nt…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/message.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/message.c [iso-8859-1] Sun Sep 18
12:33:38 2011
@@ -334,6 +334,11 @@
            return STATUS_SUCCESS;
         }
         PackedData = ExAllocatePoolWithTag(NonPagedPool, size, TAG_MSG);
+        if (PackedData == NULL)
+        {
+            ERR("Not enough memory to pack lParam\n");
+            return STATUS_NO_MEMORY;
+        }
         RtlCopyMemory(PackedData, (PVOID)lParam, MsgMemorySize(MsgMemoryEntry, wParam,
lParam));
         *lParamPacked = (LPARAM)PackedData;
     }
@@ -375,6 +380,7 @@
     {
         PMSGMEMORY MsgMemoryEntry;
         MsgMemoryEntry = FindMsgMemory(Msg);
+        ASSERT(MsgMemoryEntry);
         if (MsgMemoryEntry->Size < 0)
         {
             /* Keep previous behavior */
@@ -587,7 +593,7 @@
     CWPR.message = Msg;
     CWPR.wParam  = wParam;
     CWPR.lParam  = lParam;
-    CWPR.lResult = *uResult;
+    CWPR.lResult = uResult ? (*uResult) : 0;
     co_HOOK_CallHooks( WH_CALLWNDPROCRET, HC_ACTION, SameThread, (LPARAM)&CWPR );
 }
 
@@ -608,7 +614,7 @@
 
     pti = PsGetCurrentThreadWin32Thread();
 
-    if ( Window->head.pti != pti)
+    if ( Window && Window->head.pti != pti)
     {
        EngSetLastError( ERROR_MESSAGE_SYNC_ONLY );
        return 0;
@@ -2050,7 +2056,7 @@
     {
     case FNID_DEFWINDOWPROC:
         /* Validate input */
-        if (hWnd && (hWnd != INVALID_HANDLE_VALUE))
+        if (hWnd)
         {
            Window = UserGetWindowObject(hWnd);
            if (!Window)
@@ -2058,11 +2064,12 @@
                UserLeave();
                return FALSE;
            }
-        }
-        UserRefObjectCo(Window, &Ref);
+           UserRefObjectCo(Window, &Ref);
+        }
         lResult = IntDefWindowProc(Window, Msg, wParam, lParam, Ansi);
         Ret = TRUE;
-        UserDerefObjectCo(Window);
+        if (hWnd)
+            UserDerefObjectCo(Window);
         break;
     case FNID_SENDNOTIFYMESSAGE:
         Ret = UserSendNotifyMessage(hWnd, Msg, wParam, lParam);

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/window.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/nt…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/window.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/window.c [iso-8859-1] Sun Sep 18 12:33:38
2011
@@ -1591,7 +1591,7 @@
         Dialog boxes and message boxes do not inherit layout, so you must
         set the layout explicitly.
        */
-         if ( Class && Class->fnid != FNID_DIALOG)
+         if ( Class->fnid != FNID_DIALOG)
          {
             PPROCESSINFO ppi = PsGetCurrentProcessWin32Process();
             if (ppi->dwLayout & LAYOUT_RTL)
@@ -2170,6 +2170,9 @@
 
       if (Window->ExStyle & WS_EX_MDICHILD)
       {
+          ASSERT(ParentWindow);
+          if(!ParentWindow)
+              goto cleanup;
         co_IntSendMessage(UserHMGetHandle(ParentWindow), WM_MDIREFRESHMENU, 0, 0);
         /* ShowWindow won't activate child windows */
         co_WinPosSetWindowPos(Window, HWND_TOP, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOMOVE |
SWP_NOSIZE);
@@ -2291,19 +2294,18 @@
     lstrWindowName.Buffer = NULL;
     lstrClassName.Buffer = NULL;
 
-    /* Check if we got a Window name */
-    if (plstrWindowName)
+    ASSERT(plstrWindowName);
+
+    /* Copy the window name to kernel mode */
+    Status = ProbeAndCaptureLargeString(&lstrWindowName, plstrWindowName);
+    if (!NT_SUCCESS(Status))
     {
-        /* Copy the string to kernel mode */
-        Status = ProbeAndCaptureLargeString(&lstrWindowName, plstrWindowName);
-        if (!NT_SUCCESS(Status))
-        {
-            ERR("NtUserCreateWindowEx: failed to capture plstrWindowName\n");
-            SetLastNtError(Status);
-            return NULL;
-        }
-        plstrWindowName = &lstrWindowName;
+        ERR("NtUserCreateWindowEx: failed to capture plstrWindowName\n");
+        SetLastNtError(Status);
+        return NULL;
     }
+
+    plstrWindowName = &lstrWindowName;
 
     /* Check if the class is an atom */
     if (IS_ATOM(plstrClassName))

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/nt…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c [iso-8859-1] Sun Sep 18 12:33:38
2011
@@ -161,6 +161,12 @@
    HWND *List = IntWinListChildren(parent);
 
    ASSERT_REFS_CO(parent);
+
+   /* Check if we found any children */
+   if(List == NULL)
+   {
+       return 0;
+   }
 
    IntGetClientRect( parent, &rectParent );
    x = rectParent.left;
@@ -693,15 +699,14 @@
  */
 static
 HWND FASTCALL
-WinPosDoOwnedPopups(HWND hWnd, HWND hWndInsertAfter)
+WinPosDoOwnedPopups(PWND Window, HWND hWndInsertAfter)
 {
    HWND *List = NULL;
    HWND Owner;
    LONG Style;
-   PWND Window ,DesktopWindow, ChildObject;
+   PWND DesktopWindow, ChildObject;
    int i;
 
-   Window = UserGetWindowObject(hWnd);
    Owner = Window->spwndOwner ? Window->spwndOwner->head.h : NULL;
    Style = Window->style;
 
@@ -732,7 +737,7 @@
                      }
                   }
                }
-               if (List[i] != hWnd)
+               if (List[i] != Window->head.h)
                   hWndLocalPrev = List[i];
                if (hWndLocalPrev == hWndInsertAfter)
                   break;
@@ -757,7 +762,7 @@
       {
          PWND Wnd;
 
-         if (List[i] == hWnd)
+         if (List[i] == Window->head.h)
             break;
 
          if (!(Wnd = UserGetWindowObject(List[i])))
@@ -896,11 +901,15 @@
             && HWND_NOTOPMOST != WinPos->hwndInsertAfter
             && HWND_BOTTOM != WinPos->hwndInsertAfter)
       {
-         PWND InsAfterWnd, Parent = Wnd->spwndParent;
+         PWND InsAfterWnd;
 
          InsAfterWnd = UserGetWindowObject(WinPos->hwndInsertAfter);
-
-         if (InsAfterWnd && UserGetAncestor(InsAfterWnd, GA_PARENT) != Parent)
+         if(!InsAfterWnd)
+         {
+             return TRUE;
+         }
+
+         if (InsAfterWnd->spwndParent != Wnd->spwndParent)
          {
             return FALSE;
          }
@@ -995,7 +1004,7 @@
          SWP_NOZORDER &&
          Ancestor && Ancestor->head.h == IntGetDesktopWindow() )
    {
-      WinPos.hwndInsertAfter = WinPosDoOwnedPopups(WinPos.hwnd, WinPos.hwndInsertAfter);
+      WinPos.hwndInsertAfter = WinPosDoOwnedPopups(Window, WinPos.hwndInsertAfter);
    }
 
    if (!(WinPos.flags & SWP_NOREDRAW))
@@ -1604,9 +1613,8 @@
                     return pwndChild;
                 }
             }
+            ExFreePool(List);
         }
-
-        ExFreePool(List);
     }
 
     *HitTest = co_IntSendMessage(ScopeWin->head.h, WM_NCHITTEST, 0,
@@ -1756,17 +1764,28 @@
 
     for (i = 0, winpos = pDWP->acvr; res && i < pDWP->ccvr; i++,
winpos++)
     {
+        PWND pwnd;
+        USER_REFERENCE_ENTRY Ref;
+
         TRACE("hwnd %p, after %p, %d,%d (%dx%d), flags %08x\n",
                winpos->pos.hwnd, winpos->pos.hwndInsertAfter, winpos->pos.x,
winpos->pos.y,
                winpos->pos.cx, winpos->pos.cy, winpos->pos.flags);
-
-        res = co_WinPosSetWindowPos( UserGetWindowObject(winpos->pos.hwnd),
+        
+        pwnd = UserGetWindowObject(winpos->pos.hwnd);
+        if(!pwnd)
+            continue;
+
+        UserRefObjectCo(pwnd, &Ref);
+
+        res = co_WinPosSetWindowPos( pwnd,
                                      winpos->pos.hwndInsertAfter,
                                      winpos->pos.x,
                                      winpos->pos.y,
                                      winpos->pos.cx,
                                      winpos->pos.cy,
                                      winpos->pos.flags);
+
+        UserDerefObjectCo(pwnd);
     }
     ExFreePoolWithTag(pDWP->acvr, USERTAG_SWP);
     UserDereferenceObject(pDWP);