[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] shadow2 corrupting PV guest state

At 20:21 +0900 on 23 Oct (1161634872), Doi.Tsunehisa@xxxxxxxxxxxxxx wrote:
> > Are you worried about a race where the foreign domain is destroyed and
> > another domain created, with the same struct domain pointer, and which
> > owns the same frame, between the __acquire_grant_for_copy() and the
> > get_page()?
>   No, I'm worried that two domains use with same page frame.
>   The released pages can be used by new domain, but old domain sturct
> exists between domain_kill and domain_destroy.

If the released frames are used by a new domain, get_page() will fail:
the old domain still exists (we have a reference to it), so the new
owner's domain pointer must be different from the one we pass to



Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.