On Mon, Apr 11, 2022 at 12:00 PM Jacky Li <jackyli@xxxxxxxxxx> 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 <jackyli@xxxxxxxxxx> Reviewed-by: Peter Gonda <pgonda@xxxxxxxxxx> Agreed about the fixes tag.
