Re: [PATCH v3] x86/ioperm: Fix io bitmap invalidation on Xen PV

[JÃrgen GroÃ]

On 18.07.20 01:53, Andy Lutomirski wrote:
> tss_invalidate_io_bitmap() wasn't wired up properly through the pvop
> machinery, so the TSS and Xen's io bitmap would get out of sync
> whenever disabling a valid io bitmap.
>
> Add a new pvop for tss_invalidate_io_bitmap() to fix it.
>
> This is XSA-329.
>
> Cc: Juergen Gross <jgross@xxxxxxxx>
> Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 22fe5b0439dd ("x86/ioperm: Move TSS bitmap update to exit to user work")
> Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>

Reviewed-by: Juergen Gross <jgross@xxxxxxxx>


Juergen