From b7c2ea8d468136ae5d8865b5b42d05b24129577f Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Sun, 23 Apr 2023 14:46:18 +0300
Subject: [PATCH] Kernel: Fix possible dead lock in Process::read()

---
 kernel/kernel/Process.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index 0ef607ee..bcdc4d34 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -201,10 +201,13 @@ namespace Kernel
 
 	BAN::ErrorOr<size_t> Process::read(int fd, void* buffer, size_t count)
 	{
-		m_lock.lock();
-		TRY(validate_fd(fd));
-		auto open_fd_copy = open_file_description(fd);
-		m_lock.unlock();
+		OpenFileDescription open_fd_copy;
+
+		{
+			LockGuard _(m_lock);
+			TRY(validate_fd(fd));
+			open_fd_copy = open_file_description(fd);
+		}
 
 		if (!(open_fd_copy.flags & O_RDONLY))
 			return BAN::Error::from_errno(EBADF);