From: Marc Zyngier <maz@kernel.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org, Oliver Upton <oupton@kernel.org>,
Wei-Lin Chang <weilin.chang@arm.com>
Subject: Re: [PATCH 6.12.y 1/2] KVM: arm64: Ensure level is always initialized when relaxing perms
Date: Tue, 21 Jul 2026 14:01:42 +0100 [thread overview]
Message-ID: <86v7a8ebt5.wl-maz@kernel.org> (raw)
In-Reply-To: <2026072128-eggplant-pancreas-743d@gregkh>
On Tue, 21 Jul 2026 13:53:46 +0100,
Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Tue, Jul 21, 2026 at 11:05:22AM +0100, Marc Zyngier wrote:
> > From: Oliver Upton <oupton@kernel.org>
> >
> > stage2_update_leaf_attrs() returns early before writing to @level if the
> > table walker returned an error. At the same time,
> > kvm_pgtable_stage2_relax_perms() uses the level as a TLBI TTL hint when the
> > error was EAGAIN, indicating the vCPU raced with a table update and the TLB
> > entry it hit is now stale.
> >
> > Fall back to an unknown TTL if none was provided by the walk.
> >
> > Cc: stable@vger.kernel.org
> > Fixes: be097997a273 ("KVM: arm64: Always invalidate TLB for stage-2 permission faults")
> > Signed-off-by: Oliver Upton <oupton@kernel.org>
> > Reviewed-by: Wei-Lin Chang <weilin.chang@arm.com>
> > Link: https://patch.msgid.link/20260701231620.3300204-2-oupton@kernel.org
> > Signed-off-by: Marc Zyngier <maz@kernel.org>
> > (cherry picked from commit 100baf0184896f859290a684f864b8200d8ac872)
> > Signed-off-by: Marc Zyngier <maz@kernel.org>
> > (cherry picked from commit f35e314d4512480316454d3e963c513faa68decf)
>
> This id isn't in the tree, something went wrong?
Crap. No idea how I managed to have *two* of those. Probably a
cherry-pick -xs between stable trees... :-/
Sorry for the mess.
> I'll just drop it and use the real one here.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
prev parent reply other threads:[~2026-07-21 13:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-20 12:21 FAILED: patch "[PATCH] KVM: arm64: Ensure level is always initialized when relaxing" failed to apply to 6.12-stable tree gregkh
2026-07-21 10:05 ` [PATCH 6.12.y 1/2] KVM: arm64: Ensure level is always initialized when relaxing perms Marc Zyngier
2026-07-21 10:05 ` [PATCH 6.12.y 2/2] KVM: arm64: Fix propagation of TLBI level in kvm_pgtable_stage2_relax_perms() Marc Zyngier
2026-07-21 12:53 ` [PATCH 6.12.y 1/2] KVM: arm64: Ensure level is always initialized when relaxing perms Greg KH
2026-07-21 13:01 ` Marc Zyngier [this message]
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