Re: [Xen-devel] [PATCH] Increment buffer used to read first boot sector in order to accomodate space for 4k sector

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.08.12 at 17:22, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:
>>>> On 03.08.12 at 16:50, Frediano Ziglio <frediano.ziglio@xxxxxxxxxx> wrote:
>> This patch increase sector buffer in order to avoid this overflow
> 
> And if we indeed need to adjust for this, then let's fix this properly:
> Don't just increase the buffer size, but also check that the sector
> size reported actually fits. That may require calling Fn48 first,
> before doing the actual read.

This, btw, is how current Linux is doing it. But I don't think they're
really protected from corruption either when sufficiently large
sector sizes get encountered...

Jan


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