From 064e46e581e682ca8e99e2771494c634bffcedb4 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Fri, 3 Jan 2020 02:23:50 +0100
Subject: [PATCH] Kernel: Don't allow open() with (O_CREAT | O_DIRECTORY)

---
 Kernel/FileSystem/VirtualFileSystem.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Kernel/FileSystem/VirtualFileSystem.cpp b/Kernel/FileSystem/VirtualFileSystem.cpp
index d91f558878..64317dec64 100644
--- a/Kernel/FileSystem/VirtualFileSystem.cpp
+++ b/Kernel/FileSystem/VirtualFileSystem.cpp
@@ -185,6 +185,9 @@ KResultOr<InodeMetadata> VFS::lookup_metadata(StringView path, Custody& base, in
 
 KResultOr<NonnullRefPtr<FileDescription>> VFS::open(StringView path, int options, mode_t mode, Custody& base)
 {
+    if ((options & O_CREAT) && (options & O_DIRECTORY))
+        return KResult(-EINVAL);
+
     RefPtr<Custody> parent_custody;
     auto custody_or_error = resolve_path(path, base, &parent_custody, options);
     if (options & O_CREAT) {