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Re: [Xen-devel] [PATCH] x86: fix off-by-one in is_xen_fixed_mfn()
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 23 Oct 2019 16:15:16 +0100
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- Cc: Juergen Gross <jgross@xxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Wed, 23 Oct 2019 15:15:27 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 23/10/2019 16:02, Jan Beulich wrote:
> __2M_rwdata_end marks the first byte after the Xen image, not its last
> byte. Subtract 1 to obtain the upper bound to compare against. (Note
> that instead switching from <= to < is less desirable, as in principle
> __pa() might return rubbish for addresses outside of the Xen image.)
>
> Since the & needs to be dropped from the line in question, also drop it
> from the adjacent one.
>
> Reported-by: Julien Grall <julien.grall@xxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> ---
> Since the Arm side equivalent was taken for 4.13, this one should at
> least be considered as well.
+1 for inclusion into 4.13
~Andrew
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