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

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@suse.com Cc: Boris Ostrovsky boris.ostrovsky@oracle.com Cc: Stefano Stabellini sstabellini@kernel.org Cc: stable@vger.kernel.org Fixes: 22fe5b0439dd ("x86/ioperm: Move TSS bitmap update to exit to user work") Reviewed-by: Juergen Gross jgross@suse.com Reviewed-by: Thomas Gleixner tglx@linutronix.de Signed-off-by: Andy Lutomirski luto@kernel.org

Reviewed-by: Juergen Gross jgross@suse.com

Juergen