[khornicek] 73879: [NTUSER] - Prevent a null to be passed to UserDereferenceObject in UserSetCursorIconData. CID 1321971 - Make the status check in co_IntCallSentMessageCallback less useless. CID 1...

Author: khornicek
Date: Wed Feb 22 10:29:03 2017
New Revision: 73879

URL: http://svn.reactos.org/svn/reactos?rev=73879&view=rev
Log:
[NTUSER]
- Prevent a null to be passed to UserDereferenceObject in UserSetCursorIconData. CID
1321971
- Make the status check in co_IntCallSentMessageCallback less useless. CID 1322014
- Prevent a null pointer dereference in a trace in IntCreateClass. CID 514617

Modified:
    trunk/reactos/win32ss/user/ntuser/callback.c
    trunk/reactos/win32ss/user/ntuser/callproc.c
    trunk/reactos/win32ss/user/ntuser/class.c
    trunk/reactos/win32ss/user/ntuser/cursoricon.c

Modified: trunk/reactos/win32ss/user/ntuser/callback.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/callba…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/callback.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/callback.c	[iso-8859-1] Wed Feb 22 10:29:03 2017
@@ -279,6 +279,7 @@
 
    if (!NT_SUCCESS(Status))
    {
+      ERR("KeUserModeCallback failed with %lx\n", Status);
       return;
    }
    return;

Modified: trunk/reactos/win32ss/user/ntuser/callproc.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/callpr…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/callproc.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/callproc.c	[iso-8859-1] Wed Feb 22 10:29:03 2017
@@ -47,10 +47,10 @@
         NewCallProc->pfnClientPrevious = WndProc;
         NewCallProc->wType |= Unicode ? UserGetCPDA2U : UserGetCPDU2A ;
         NewCallProc->spcpdNext = NULL;
+
+        /* Release the extra reference (UserCreateObject added 2 references) */
+        UserDereferenceObject(NewCallProc);
     }
-
-    /* Release the extra reference (UserCreateObject added 2 references) */
-    if (NewCallProc != NULL) UserDereferenceObject(NewCallProc);
 
     return NewCallProc;
 }

Modified: trunk/reactos/win32ss/user/ntuser/class.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/class.…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/class.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/class.c	[iso-8859-1] Wed Feb 22 10:29:03 2017
@@ -1228,7 +1228,8 @@
     }
 
     TRACE("Created class 0x%p with name %wZ and proc 0x%p for atom 0x%x and version
atom 0x%x and hInstance 0x%p, global %u\n",
-            Class, ClassName, Class->lpfnWndProc, Atom, verAtom, Class->hModule,
Class->Global);
+          Class, ClassName, Class ? Class->lpfnWndProc : NULL, Atom, verAtom,
+          Class ? Class->hModule : NULL , Class ? Class->Global : 0);
 
     return Class;
 }
@@ -2332,6 +2333,7 @@
             if (SYSTEMCUR(ARROW) == NULL)
             {
                 ERR("SYSTEMCUR(ARROW) == NULL, should not happen!!\n");
+                ASSERT(FALSE);
             }
             else
             {

Modified: trunk/reactos/win32ss/user/ntuser/cursoricon.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/user/ntuser/cursor…
==============================================================================
--- trunk/reactos/win32ss/user/ntuser/cursoricon.c	[iso-8859-1] (original)
+++ trunk/reactos/win32ss/user/ntuser/cursoricon.c	[iso-8859-1] Wed Feb 22 10:29:03 2017
@@ -1494,7 +1494,9 @@
     }
 
     /* Dereference the cursor and return the result */
-    UserDereferenceObject(pcur);
+    if (pcur)
+        UserDereferenceObject(pcur);
+
     return bResult;
 }