Re: [Part2 PATCH v7 35/38] KVM: SVM: Pin guest memory when SEV is active

[Brijesh Singh <brijesh.singh@xxxxxxx>]

On 11/06/2017 08:43 AM, Borislav Petkov wrote:
...

> > +
> > +	region->uaddr = range->addr;
> > +	region->size = range->size;
> > +	list_add_tail(&region->list, &sev->regions_list);
> > +	return ret;
>
> Nothing's protecting that list from concurrent modifications of adding
> and removal of regions.

Ah good catch. I will fix this in next rev. Similar to the mem_enc_op(), 
we need to acquire the kvm->lock when adding or removing the regions.

-Brijesh