Re: [GIT PULL] KVM: Fixes for 7.3-rcN

[Sean Christopherson]

On Sat, Sep 26, 2026, Paolo Bonzini wrote:
> On Sat, Sep 26, 2026 at 1:33 AM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
> >
> > Please pull a variety of fixes.  Nothing is super urgent, but all of these can
> > be fatal to the host and/or guest (except for the selftest change, which fixes
> > a regression that was introduced in 7.3).
> >
> > The following changes since commit d599822bdb66aeec5ec76297b0fc6efaaeefe07c:
> >
> >   Merge tag 'kvm-s390-master-7.3-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD (2026-09-04 17:34:28 +0200)
> >
> > are available in the Git repository at:
> >
> >   https://github.com/kvm-x86/linux.git tags/kvm-x86-fixes-7.3-rc5
> >
> > for you to fetch changes up to 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d:
> >
> >   KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes (2026-09-22 08:36:16 -0700)
> 
> Pulled, thanks. I added on top the SEV cache writeback patches which
> are not present here.

Heh, because they're buggy.  Sashiko pointed out flaws in both[1][2].  I have
fixes (will send them shortly); I was late on posting v2 because it took me forever
to figure out a not-awful solution for the double-free issue due to the annoying
CONFIG_CPUMASK_OFFSTACK behavior.

[1] https://lore.kernel.org/all/20260923165304.1662E1F000FF@xxxxxxxxxxxxxxx
[2] https://lore.kernel.org/all/20260923165349.CAAF01F000FF@xxxxxxxxxxxxxxx