linux-kernel - Re: [PATCH v2] vfio/type1: Use follow

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Message-ID: <20210216234337.GE91264@xz-x1>
Date:   Tue, 16 Feb 2021 18:43:37 -0500
From:   Peter Xu <peterx@...hat.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     cohuck@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, pbonzini@...hat.com, jgg@...dia.com
Subject: Re: [PATCH v2] vfio/type1: Use follow_pte()

On Tue, Feb 16, 2021 at 03:49:34PM -0700, Alex Williamson wrote:
> follow_pfn() doesn't make sure that we're using the correct page
> protections, get the pte with follow_pte() so that we can test
> protections and get the pfn from the pte.
> 
> Fixes: 5cbf3264bc71 ("vfio/type1: Fix VA->PA translation for PFNMAP VMAs in vaddr_get_pfn()")
> Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> Reviewed-by: Cornelia Huck <cohuck@...hat.com>
> Signed-off-by: Alex Williamson <alex.williamson@...hat.com>

Reviewed-by: Peter Xu <peterx@...hat.com>

-- 
Peter Xu