Re: [Xen-devel] [PATCH] x86: fix off-by-one in is_xen_fixed_mfn()

[Jürgen Groß <jgross@xxxxxxxx>]

On 23.10.19 17:02, 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>
Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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