Re: [Xen-devel] [PATCH V2 1/3] xen: mark pvscsi frontend request consumed only after last read

From: David Vrabel
Date: Fri Feb 20 2015 - 08:53:00 EST

On 17/02/15 07:02, Juergen Gross wrote:
> A request in the ring buffer mustn't be read after it has been marked
> as consumed. Otherwise it might already have been reused by the
> frontend without violating the ring protocol.
> To avoid inconsistencies in the backend only work on a private copy
> of the request. This will ensure a malicious guest not being able to
> bypass consistency checks of the backend by modifying an active
> request.

Applied to stable/for-linus-3.20 and tagged for stable, thanks.

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