[NPFS] Fix dereference of uninitialized variable

- Avoid uninitialized return variables
- Fix a parameter check

Author: tkreuzer

drivers/filesystems/npfs/fileobsup.c

@@ -36,6 +36,8 @@ NpDecodeFileObject(IN PFILE_OBJECT FileObject,
         switch (Node->NodeType)
         {
             case NPFS_NTC_VCB:
+                *Ccb = NULL;
+                if (PrimaryContext) *PrimaryContext = Node;
                 return NPFS_NTC_VCB;
 
             case NPFS_NTC_ROOT_DCB:

drivers/filesystems/npfs/fsctrl.c

@@ -363,7 +363,7 @@ NpPeek(IN PDEVICE_OBJECT DeviceObject,
         return STATUS_PIPE_DISCONNECTED;
     }
 
-    if ((Type != NPFS_NTC_CCB) &&
+    if ((Type != NPFS_NTC_CCB) ||
         (OutputLength < FIELD_OFFSET(FILE_PIPE_PEEK_BUFFER, Data)))
     {
         return STATUS_INVALID_PARAMETER;