From 522d8c5d7190bb97916c04dd1bcf0a1d71403191 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Fri, 3 Apr 2020 09:59:58 +0200
Subject: [PATCH] Kernel: Non-readable-but-writable regions should still be
 mapped

Fixes #1436.
---
 Kernel/VM/Region.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Kernel/VM/Region.cpp b/Kernel/VM/Region.cpp
index 2320ef6ea0..37629baa03 100644
--- a/Kernel/VM/Region.cpp
+++ b/Kernel/VM/Region.cpp
@@ -215,7 +215,7 @@ void Region::map_individual_page_impl(size_t page_index)
     auto page_vaddr = vaddr().offset(page_index * PAGE_SIZE);
     auto& pte = MM.ensure_pte(*m_page_directory, page_vaddr);
     auto& physical_page = vmobject().physical_pages()[first_page_index() + page_index];
-    if (!physical_page || !is_readable()) {
+    if (!physical_page || (!is_readable() && !is_writable())) {
         pte.clear();
     } else {
         pte.set_cache_disabled(!m_cacheable);