fix: obtain correct page table entry when performing eviction

src/userprog/exception.c

@@ -252,7 +252,7 @@ fetch_page (void *upage, bool write)
 {
   /* Check if the page is in the supplemental page table. That is, it is a page
      that is expected to be in memory. */
-  struct page_entry *page = page_get (upage);
+  struct page_entry *page = page_get (thread_current (), upage);
   if (page == NULL)
     return false;