Re: [PATCH, RFC 45/62] mm: Add the encrypt_mprotect() system call for MKTME

[Peter Zijlstra]

On Wed, May 08, 2019 at 05:44:05PM +0300, Kirill A. Shutemov wrote:
> diff --git a/fs/exec.c b/fs/exec.c
> index 2e0033348d8e..695c121b34b3 100644
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -755,8 +755,8 @@ int setup_arg_pages(struct linux_binprm *bprm,
>       vm_flags |= mm->def_flags;
>       vm_flags |= VM_STACK_INCOMPLETE_SETUP;
>  
> -     ret = mprotect_fixup(vma, &prev, vma->vm_start, vma->vm_end,
> -                     vm_flags);
> +     ret = mprotect_fixup(vma, &prev, vma->vm_start, vma->vm_end, vm_flags,
> +                          -1);

You added a nice NO_KEY helper a few patches back, maybe use it?

>       if (ret)
>               goto out_unlock;
>       BUG_ON(prev != vma);