void
gr_handle_chroot_chdir(struct path *path)
{
#ifdef CONFIG_GRKERNSEC_CHROOT_CHDIR
	if (grsec_enable_chroot_chdir)
		set_fs_pwd(current->fs, path);
#endif
	return;
}

SYSCALL_DEFINE1(chdir, const char __user *, filename)
{
	struct path path;
	int error;

	error = user_path_dir(filename, &path);
	if (error)
		goto out;

	error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
	if (error)
		goto dput_and_out;

	set_fs_pwd(current->fs, &path);

dput_and_out:
	path_put(&path);
out:
	return error;
}

asmlinkage long sys_chdir(const char __user * filename)
{
	struct path path;
	int error;

	error = user_path_dir(filename, &path);
	if (error)
		goto out;

	error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
	if (error)
		goto dput_and_out;

	set_fs_pwd(current->fs, &path);

dput_and_out:
	path_put(&path);
out:
	return error;
}

asmlinkage long sys_chdir(const char __user * filename)
{
	struct nameidata nd;
	int error;

	error = __user_walk(filename,
			    LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
	if (error)
		goto out;

	error = vfs_permission(&nd, MAY_EXEC);
	if (error)
		goto dput_and_out;

	set_fs_pwd(current->fs, nd.mnt, nd.dentry);

dput_and_out:
	path_release(&nd);
out:
	return error;
}

SYSCALL_DEFINE1(fchdir, unsigned int, fd)
{
	struct fd f = fdget_raw(fd);
	int error;

	error = -EBADF;
	if (!f.file)
		goto out;

	error = -ENOTDIR;
	if (!d_can_lookup(f.file->f_path.dentry))
		goto out_putf;

	error = inode_permission(file_inode(f.file), MAY_EXEC | MAY_CHDIR);
	if (!error)
		set_fs_pwd(current->fs, &f.file->f_path);
out_putf:
	fdput(f);
out:
	return error;
}

SYSCALL_DEFINE1(fchdir, unsigned int, fd)
{
	struct fd f = fdget_raw(fd);
	struct inode *inode;
	int error = -EBADF;

	error = -EBADF;
	if (!f.file)
		goto out;

	inode = file_inode(f.file);

	error = -ENOTDIR;
	if (!S_ISDIR(inode->i_mode))
		goto out_putf;

	error = inode_permission(inode, MAY_EXEC | MAY_CHDIR);
	if (!error)
		set_fs_pwd(current->fs, &f.file->f_path);
out_putf:
	fdput(f);
out:
	return error;
}