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Re: [PATCH v2] tools/xenstore: add error indicator to ring page
- To: Juergen Gross <jgross@xxxxxxxx>
- From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
- Date: Thu, 17 Feb 2022 12:00:31 +0000
- Authentication-results: esa4.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
- Cc: <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, "Jan Beulich" <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Thu, 17 Feb 2022 12:00:43 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Thu, Feb 17, 2022 at 12:30:16PM +0100, Juergen Gross wrote:
> In case Xenstore is detecting a malicious ring page modification (e.g.
> an invalid producer or consumer index set by a guest) it will ignore
> the connection of that guest in future.
>
> Add a new error field to the ring page indicating that case. Add a new
> feature bit in order to signal the presence of that error field.
>
> Move the ignore_connection() function to xenstored_domain.c in order
> to be able to access the ring page for setting the error indicator.
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> ---
> V2:
> - add some clarifications (Anthony PERARD)
Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Thanks,
--
Anthony PERARD
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