Re: [Xen-devel] [PATCH V2] x86/xsaves: get_xsave_addr, check xsave header and support uncompressed format

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 18/12/15 15:03, Huaitong Han wrote:
> The check needs to be against the xsave header in the area, rather than Xen's
> maximum xfeature_mask. A guest might easily have a smaller xcr0 than the
> maximum Xen is willing to allow, causing the pointer below to be bogus.
>
> The get_xsave_addr() is modified to support uncompressed xstate areas.
>
> Signed-off-by: Huaitong Han <huaitong.han@xxxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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