From 60d1c261145efcb0f1abd0b653ce3605941d2eb2 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Fri, 30 May 2025 22:03:03 +0300
Subject: [PATCH] Kernel: Fix race condition in FileBackedRegion creation

---
 kernel/kernel/Memory/FileBackedRegion.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/kernel/Memory/FileBackedRegion.cpp b/kernel/kernel/Memory/FileBackedRegion.cpp
index 3b3eac85..f9e15a2c 100644
--- a/kernel/kernel/Memory/FileBackedRegion.cpp
+++ b/kernel/kernel/Memory/FileBackedRegion.cpp
@@ -27,9 +27,7 @@ namespace Kernel
 			TRY(region->m_dirty_pages.resize(BAN::Math::div_round_up<size_t>(size, PAGE_SIZE)));
 
 		LockGuard _(inode->m_mutex);
-		if (inode->m_shared_region.valid())
-			region->m_shared_data = inode->m_shared_region.lock();
-		else
+		if (!(region->m_shared_data = inode->m_shared_region.lock()))
 		{
 			auto shared_data = TRY(BAN::RefPtr<SharedFileData>::create());
 			TRY(shared_data->pages.resize(BAN::Math::div_round_up<size_t>(inode->size(), PAGE_SIZE)));