From: Steffen Eiden <seiden@linux.ibm.com>
To: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
linux-s390@vger.kernel.org, borntraeger@de.ibm.com,
frankja@linux.ibm.com, david@kernel.org, nrb@linux.ibm.com,
schlameuss@linux.ibm.com, gra@linux.ibm.com
Subject: Re: [PATCH v3 09/10] KVM: s390: Fix ordering when adding to SCA
Date: Tue, 28 Jul 2026 14:35:15 +0200 [thread overview]
Message-ID: <20260728123515.385398-B-seiden@linux.ibm.com> (raw)
In-Reply-To: <20260727150254.236021-10-imbrenda@linux.ibm.com>
On Mon, Jul 27, 2026 at 05:02:53PM +0200, Claudio Imbrenda wrote:
> When adding a new vCPU to the SCA area, the validity bit in the MCN was
> set before the pointer to the state description, potentially allowing
> for a race.
>
> Fix by setting the pointer before setting the bit.
>
> Fixes: 14542a0a54c5 ("KVM: S390: Remove sca_lock")
> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
next prev parent reply other threads:[~2026-07-28 12:35 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 15:02 [PATCH v3 00/10] KVM: s390: Misc fixes Claudio Imbrenda
2026-07-27 15:02 ` [PATCH v3 01/10] KVM: s390: Fix unlikely NULL gmap dereference Claudio Imbrenda
2026-07-27 15:24 ` sashiko-bot
2026-07-28 14:16 ` Janosch Frank
2026-07-28 15:09 ` Christian Borntraeger
2026-07-27 15:02 ` [PATCH v3 02/10] KVM: s390: Fix leaking of PGM_ADDRESSING to userspace Claudio Imbrenda
2026-07-27 15:33 ` sashiko-bot
2026-07-27 15:02 ` [PATCH v3 03/10] KVM: s390: Fix race in __do_essa() Claudio Imbrenda
2026-07-27 15:43 ` sashiko-bot
2026-07-27 15:02 ` [PATCH v3 04/10] KVM: s390: cmma: Fix dirty tracking when removing memslot Claudio Imbrenda
2026-07-27 16:03 ` sashiko-bot
2026-07-27 15:02 ` [PATCH v3 05/10] KVM: s390: ucontrol: Add missing locking around gmap_remove_child() Claudio Imbrenda
2026-07-27 16:14 ` sashiko-bot
2026-07-27 15:02 ` [PATCH v3 06/10] KVM: s390: Fix overclearing ESCA in case of error Claudio Imbrenda
2026-07-27 16:33 ` sashiko-bot
2026-07-27 15:02 ` [PATCH v3 07/10] KVM: s390: Return -EINTR if a signal was pending while faulting-in Claudio Imbrenda
2026-07-27 16:59 ` sashiko-bot
2026-07-28 14:28 ` Janosch Frank
2026-07-28 14:49 ` Claudio Imbrenda
2026-07-27 15:02 ` [PATCH v3 08/10] KVM: s390: Free the mmu cache when kvm_arch_vcpu_create() fails Claudio Imbrenda
2026-07-27 17:06 ` sashiko-bot
2026-07-28 12:33 ` Steffen Eiden
2026-07-27 15:02 ` [PATCH v3 09/10] KVM: s390: Fix ordering when adding to SCA Claudio Imbrenda
2026-07-27 17:12 ` sashiko-bot
2026-07-28 12:35 ` Steffen Eiden [this message]
2026-07-28 14:13 ` Janosch Frank
2026-07-27 15:02 ` [PATCH v3 10/10] KVM: s390: Fix cleanup in kvm_s390_pv_create_cpu() Claudio Imbrenda
2026-07-27 17:18 ` sashiko-bot
2026-07-28 12:40 ` Steffen Eiden
2026-07-28 14:12 ` Janosch Frank
2026-07-28 14:43 ` Claudio Imbrenda
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