vfs: catch invalid modes in may_open()

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20250209185523.745956-3-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/namei.c b/fs/namei.c
index 3ab9440..21630a0 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3415,6 +3415,8 @@ static int may_open(struct mnt_idmap *idmap, const struct path *path,
                if ((acc_mode & MAY_EXEC) && path_noexec(path))
                        return -EACCES;
                break;
+       default:
+               VFS_BUG_ON_INODE(1, inode);
        }
 
        error = inode_permission(idmap, inode, MAY_OPEN | acc_mode);