Re: [Xen-devel] [PATCH 3 of 3] Fix liveness of pages in grant copy operations

[Tim Deegan <tim@xxxxxxx>]

At 08:41 -0500 on 24 Nov (1322124093), Andres Lagar-Cavilla wrote:
> We were immediately putting the p2m entry translation for grant
> copy operations. This allowed for an unnecessary race by which the
> page could have been swapped out between the p2m lookup and the actual
> use. Hold on to the p2m entries until the grant operation finishes.
> 
> Also fixes a small bug: for the source page of the copy, get_page
> was assuming the page was owned by the source domain. It may be a
> shared page, since we don't perform an unsharing p2m lookup.
> 
> Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>

Applied, thanks.

Tim.

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