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Re: [Xen-devel] [PATCH for-4.12] xen/arm: gic: Make sure the number of interrupt lines is valid before using it
- To: Julien Grall <julien.grall@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Wed, 23 Jan 2019 14:36:06 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Jan-Peter Larsson <Jan-Peter.Larsson@xxxxxxx>, andre.przywara@xxxxxxx
- Delivery-date: Wed, 23 Jan 2019 13:36:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 23/01/2019 14:29, Julien Grall wrote:
> (+ Juergen)
>
> Hi Juergen,
>
> On 22/01/2019 23:22, Stefano Stabellini wrote:
>> On Fri, 30 Nov 2018, Julien Grall wrote:
>>> GICv2 and GICv3 supports up to 1020 interrupts. However, the value
>>> computed
>>> from GICD_TYPER.ITLinesNumber can be up to 1024. On GICv3, we will
>>> end up to
>>> write in reserved registers that are right after the IROUTERs one as the
>>> value is not capped early enough.
>>>
>>> Cap the number of interrupts as soon as we compute it so we know we can
>>> safely using it afterwards.
>>>
>>> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
>>> Reported-by: Jan-Peter Larsson <Jan-Peter.Larsson@xxxxxxx>
>>
>> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
>
> Would it be possible to give an RAB for this patch?
Release-acked-by: Juergen Gross <jgross@xxxxxxxx>
Juergen
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