Re: 6.1.y status: 2abd5287f083 ("KVM: x86: Check for invalid/obsolete root *after* making MMU pages available") / CVE-2026-64561

[Sergey Senozhatsky <senozhatsky@chromium.org>]

On (26/08/11 09:03), Sean Christopherson wrote:
> +Sergey
>
[..]
> > Now planned.  The fix doesn't apply cleanly to 6.1, and the resolving the conflict
> > isn't super straightforward (though it's not thaaaat bad either).
> > 
> > https://lore.kernel.org/all/anpVAhjqvBvIuoa0@google.com
> > 
> > > The security tracker [1] for the Debian 12 stable kernel (6.1.y)
> > > shows a vulnerable status.
> > > 
> > > I do not have a backport to offer, so this is just an inquiry.
> > > I am happy to build and test a candidate on 6.1 if that would
> > > be useful.
> > 
> > I'll post a patch today and Cc you (unless I get goldfish brain, in which case
> > I apologize in advance).
> 
> Actually, duh, Sasha already posted backports[*], and his approach is much better
> than manually resolving the conflicts.  Testing that now, I'll ACK those assuming
> all goes well.
> 
> [*] https://lore.kernel.org/all/20260730121535.2208491-1-sashal@kernel.org

Good news and good job!  Thanks.