From 27d07796b4a240eec14a010935b61afb463d67c8 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Thu, 28 Jan 2021 14:40:14 +0100
Subject: [PATCH] Kernel: Add sanity check assertion in
 RangeAllocator::allocate_anywhere

The requested alignment should always be a multiple of the page size.
---
 Kernel/VM/RangeAllocator.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Kernel/VM/RangeAllocator.cpp b/Kernel/VM/RangeAllocator.cpp
index c6292cc715..6db31078ae 100644
--- a/Kernel/VM/RangeAllocator.cpp
+++ b/Kernel/VM/RangeAllocator.cpp
@@ -112,6 +112,7 @@ Optional<Range> RangeAllocator::allocate_anywhere(size_t size, size_t alignment)
         return {};
 
     ASSERT((size % PAGE_SIZE) == 0);
+    ASSERT((alignment % PAGE_SIZE) == 0);
 
 #ifdef VM_GUARD_PAGES
     // NOTE: We pad VM allocations with a guard page on each side.