From cd5b351ce4400cb16e68e7f1b2b43a9ba0827eb9 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Thu, 29 May 2025 03:21:01 +0300
Subject: [PATCH] Kernel: Fix fchmodat mode handling

Ignore file type bits instead of returning EINVAL if they are set
---
 kernel/kernel/Process.cpp | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index 0d3d4fc1..f9b2d1c2 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -1217,8 +1217,6 @@ namespace Kernel
 
 	BAN::ErrorOr<long> Process::sys_fchmodat(int fd, const char* path, mode_t mode, int flag)
 	{
-		if (mode & S_IFMASK)
-			return BAN::Error::from_errno(EINVAL);
 		if (flag & ~AT_SYMLINK_NOFOLLOW)
 			return BAN::Error::from_errno(EINVAL);
 		if (flag == AT_SYMLINK_NOFOLLOW)
@@ -1234,7 +1232,7 @@ namespace Kernel
 			return BAN::Error::from_errno(EPERM);
 		}
 
-		TRY(inode->chmod(mode));
+		TRY(inode->chmod(mode & ~S_IFMASK));
 
 		return 0;
 	}