Re: [PATCHv4 3/3] x86/tdx: Handle load_unaligned_zeropad() page-cross to a shared page

[Kirill A. Shutemov]

On Wed, Jun 15, 2022 at 02:55:13PM -0700, Dave Hansen wrote:
> On 6/15/22 10:10, Kirill A. Shutemov wrote:
> >> I thought this whole exercise was kicked off by hitting this in testing.
> >>  Am I remembering this wrong?
> >>
> >>> https://lore.kernel.org/all/20220517153444.11195-10-kirill.shutemov@xxxxxxxxxxxxxxx/
> >> Says:
> >>
> >>> This is an actual, real-world problem which was discovered during TDX
> >>> testing.
> >> Or were you considering this a different problem somehow?
> > They are different.
> > 
> > The patch by the link addresses issue of load_unaligned_zeropad() stepping
> > onto unaccepted memory. This was triggered in practice.
> 
> OK, so we've got two problems both triggered by
> load_unaligned_zeropad(), but where the fixes are different.  We
> actually hit the "unaccepted memory one" in testing, but that made us
> think about other problems in the area and that's where this one came up.

I will reword it like this:

	The issue was discovered by analysis after triggering other issue with
	load_unaligned_zeropad().

Works for you?

-- 
 Kirill A. Shutemov