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Re: [PATCH v2] x86/traps: fix an off-by-one error

To: Hongyan Xia <hx242@xxxxxxx>
From: Jan Beulich <jbeulich@xxxxxxxx>
Date: Tue, 5 May 2020 17:03:07 +0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Delivery-date: Tue, 05 May 2020 15:03:17 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 05.05.2020 16:17, Hongyan Xia wrote:
> From: Hongyan Xia <hongyxia@xxxxxxxxxx>
> 
> stack++ can go into the next page and unmap_domain_page() will unmap the
> wrong one, causing mapcache and memory corruption. Fix.
> 
> Signed-off-by: Hongyan Xia <hongyxia@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

References:
- [PATCH v2] x86/traps: fix an off-by-one error
  - From: Hongyan Xia

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