On Mon, Apr 11, 2022 at 12:00 PM Jacky Li <[email protected]> wrote:
>
> There are 2 common cases when INIT_EX data file might not be
> opened successfully and fail the sev initialization:
>
> 1. In user namespaces, normal user tasks (e.g. VMM) can change their
> current->fs->root to point to arbitrary directories. While
> init_ex_path is provided as a module param related to root file
> system. Solution: use the root directory of init_task to avoid
> accessing the wrong file.
>
> 2. Normal user tasks (e.g. VMM) don't have the privilege to access
> the INIT_EX data file. Solution: open the file as root and
> restore permissions immediately.
>
> Signed-off-by: Jacky Li <[email protected]>
Reviewed-by: Peter Gonda <[email protected]>
Agreed about the fixes tag.