From b222581d18ce8503aab0ceaba78e18af777a2531 Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Tue, 21 Mar 2023 21:20:43 +0200
Subject: [PATCH] Kernel: Reading from fd verifies that file is opened for
 reading

---
 kernel/kernel/Process.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index 1a7a2b8e..208e37bf 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -108,6 +108,8 @@ namespace Kernel
 
 	BAN::ErrorOr<size_t> Process::OpenFileDescription::read(void* buffer, size_t count)
 	{
+		if (!(flags & O_RDONLY))
+			return BAN::Error::from_errno(EBADF);
 		size_t n_read = TRY(inode->read(offset, buffer, count));
 		offset += n_read;
 		return n_read;