Re: [PATCH 8/9] x86: kvm_hv_set_msr(): use __put_user() instead of 32bit __clear_user()

Linus Torvalds
2020-05-30T19:21:17Z

On Sat, May 30, 2020 at 12:14 PM Al Viro <viro@zeniv.linux.org.uk> wrote:
>
> > And none of that code verifies that the end result is a user address.
>
> kvm_is_error_hva() is
> return addr >= PAGE_OFFSET;

Ahh, that's what I missed. It won't work on other architectures, but
within x86 it's fine.

Linus