Re: [PATCH v2 2/2] KVM: s390: pv: fix index value of replaced ASCE

[Claudio Imbrenda <imbrenda@linux.ibm.com>]

On Wed, 12 Jul 2023 13:58:49 +0200
Janosch Frank <frankja@linux.ibm.com> wrote:

> On 7/5/23 13:19, Claudio Imbrenda wrote:
> > The index field of the struct page corresponding to a guest ASCE should
> > be 0. When replacing the ASCE in s390_replace_asce(), the index of the
> > new ASCE should also be set to 0.
> > 
> > Having the wrong index might lead to the wrong addresses being passed
> > around when notifying pte invalidations, and eventually to validity
> > intercepts (VM crash) if the prefix gets unmapped and the notifier gets
> > called with the wrong address.
> > 
> > Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>  
> 
> No fixes tag?

oops, you're right

Fixes: faa2f72cb356 ("KVM: s390: pv: leak the topmost page table when
destroy fails")


> 
> Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
>