On Wed, Nov 23, 2022, David Woodhouse wrote:
> From: David Woodhouse <dwmw@xxxxxxxxxxxx>
>
> We shouldn't allow guests to poll on arbitrary port numbers off the end
> of the event channel table.
>
> Fixes: 1a65105a5aba ("KVM: x86/xen: handle PV spinlocks slowpath")
> [dwmw2: my bug though; the original version did check the validity as a
> side-effect of an idr_find() which I ripped out in refactoring.]
> Reported-by: Michal Luczaj <mhal@xxxxxxx>
> Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxx
> ---
Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>
