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Re: [PATCH] x86/mm: fix alignment check for non-present entries
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 15 Nov 2024 11:37:50 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 15 Nov 2024 10:37:57 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15.11.2024 11:12, Roger Pau Monne wrote:
> While the alignment of the mfn is not relevant for non-present entries, the
> alignment of the linear address is. Commit 5b52e1b0436f introduced a
> regression by not checking the alignment of the linear address when the new
> entry was a non-present one.
>
> Fix by always checking the alignment of the linear address, non-present
> entries
> must just skip the alignment check of the physical address.
>
> Fixes: 5b52e1b0436f ('x86/mm: skip super-page alignment checks for
> non-present entries')
> Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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