Re: [PATCH 6.1.y 0/6] Delay VERW - 6.1.y backport

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On Tue, Feb 27, 2024 at 09:21:33AM +0100, Jiri Slaby wrote:
> On 27. 02. 24, 9:00, Pawan Gupta wrote:
> > This is the backport of recently upstreamed series that moves VERW
> > execution to a later point in exit-to-user path. This is needed because
> > in some cases it may be possible for data accessed after VERW executions
> > may end into MDS affected CPU buffers. Moving VERW closer to ring
> > transition reduces the attack surface.
> > 
> > Patch 1/6 includes a minor fix that is queued for upstream:
> > https://lore.kernel.org/lkml/170899674562.398.6398007479766564897.tip-bot2@tip-bot2/
> 
> Ah, you note it here.
> 
> But you should include this patch on its own instead of merging it to 1/6.

Thats exactly what I would have done ideally, but the backports to
stable kernels < 6.6 wont work without this patch. And this patch is
going to take some time before it can be merged upstream.

> You might need to wait until it is in linus' tree, though.

Ok will wait.




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