Re: [Xen-ia64-devel] [PATCH] Fix vulnerability of copy_to_user in PAL emulation

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

Hi Tristan,

This is a workaround patch for xen-3.2.
I agree with you that xencomm-izing is a better solution.
I'll be happy to revert my patch after the xencommized version 
will be applied.

Thanks,
Kouya

tgingold@xxxxxxx writes:
> I think your solution is not the right approach.  We already have a mechanism
> to avoid TLB issues: xencomm, and I think we should re-use it.
> 
> As we control the PAL (which is always in guest space), I think we should 
> simply
> xencomm-ize it (Must be done both in the GFW and PV firmware).
> 
> Tristan.

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