On 30/03/2021 11:13, Catalin Marinas wrote:
On Mon, Mar 29, 2021 at 04:55:29PM +0100, Steven Price wrote:
On 26/03/2021 18:56, Catalin Marinas wrote:
On Fri, Mar 12, 2021 at 03:18:57PM +, Steven Price wrote:
A KVM guest could store tags in a page even if the VMM hasn't mapped
the page
On Mon, Mar 29, 2021 at 04:55:29PM +0100, Steven Price wrote:
> On 26/03/2021 18:56, Catalin Marinas wrote:
> > On Fri, Mar 12, 2021 at 03:18:57PM +, Steven Price wrote:
> > > A KVM guest could store tags in a page even if the VMM hasn't mapped
> > > the page with PROT_MTE. So when restoring
On 26/03/2021 18:56, Catalin Marinas wrote:
Hi Steven,
On Fri, Mar 12, 2021 at 03:18:57PM +, Steven Price wrote:
A KVM guest could store tags in a page even if the VMM hasn't mapped
the page with PROT_MTE. So when restoring pages from swap we will
need to check to see if there are any
Hi Steven,
On Fri, Mar 12, 2021 at 03:18:57PM +, Steven Price wrote:
> A KVM guest could store tags in a page even if the VMM hasn't mapped
> the page with PROT_MTE. So when restoring pages from swap we will
> need to check to see if there are any saved tags even if !pte_tagged().
>
>
A KVM guest could store tags in a page even if the VMM hasn't mapped
the page with PROT_MTE. So when restoring pages from swap we will
need to check to see if there are any saved tags even if !pte_tagged().
However don't check pages which are !pte_valid_user() as these will
not have been swapped
