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Re: [Xen-devel] [PATCH 8 of 8] Tools: After a helper maps a ring, yank it from the guest physmap

To: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Mon, 12 Mar 2012 11:23:38 +0000
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>, "andres@xxxxxxxxxxxxxx" <andres@xxxxxxxxxxxxxx>, "Tim \(Xen.org\)" <tim@xxxxxxx>, "JBeulich@xxxxxxxx" <JBeulich@xxxxxxxx>, "adin@xxxxxxxxxxxxxx" <adin@xxxxxxxxxxxxxx>
Delivery-date: Mon, 12 Mar 2012 11:23:53 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

Andres Lagar-Cavilla writes ("[PATCH 8 of 8] Tools: After a helper maps a ring, 
yank it from the guest physmap"):
> This limits the ability of the guest to play around with its own
> rings, and DoS itself.

This looks plausible to me.

Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

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References:
- [Xen-devel] [PATCH 0 of 8] Mem event ring interface setup update, V3
  - From: Andres Lagar-Cavilla
- [Xen-devel] [PATCH 8 of 8] Tools: After a helper maps a ring, yank it from the guest physmap
  - From: Andres Lagar-Cavilla

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