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Re: [Xen-devel] [PATCH] add canonical address checks to HVM
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] add canonical address checks to HVM |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Fri, 01 Dec 2006 08:07:02 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 01 Dec 2006 00:07:02 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] add canonical address checks to HVM |
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On 1/12/06 8:05 am, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > I think it might be a security issue: > - In MSR writes, are you certain there's not going to be any problem now or > in the future when the state gets actually loaded into CPU registers? > - In memory accesses, at least until no failures to read/write guest memory > are being ignored anymore. We should be defensive about guest reads/writes/MSR-accesses anyway. I.e., we should at least accept faults on those accesses, and make sure the worst that happens is a domain crash. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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