On (08/01/18 16:25), David Howells wrote:
[..]
> @@ -2460,18 +2428,41 @@ static int do_remount(struct path *path, int
> ms_flags, int sb_flags,
> if (!can_change_locked_flags(mnt, mnt_flags))
> return -EPERM;
>
> - err = security_sb_remount(sb, data, data_size);
> - if (err)
> - return err;
> + if (type->init_fs_context) {
> + fc = vfs_sb_reconfig(path, sb_flags);
> + if (IS_ERR(fc))
> + return PTR_ERR(fc);
> +
> + err = parse_monolithic_mount_data(fc, data, data_size);
> + if (err < 0)
> + goto err_fc;
> +
> + if (fc->ops->validate) {
> + err = fc->ops->validate(fc);
> + if (err < 0)
> + goto err_fc;
> + }
> +
> + err = security_fs_context_validate(fc);
> + if (err)
> + return err;
goto err_fc?
> + } else {
> + err = security_sb_remount(sb, data, data_size);
> + if (err)
> + return err;
> + }
goto err_fc?
-ss
