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From: Cornelia Huck <cohuck@redhat.com>
To: Christian Borntraeger <borntraeger@linux.ibm.com>,
	qemu-devel <qemu-devel@nongnu.org>
Cc: qemu-s390x <qemu-s390x@nongnu.org>,
	Halil Pasic <pasic@linux.ibm.com>,
	Matthew Rosato <mjrosato@linux.ibm.com>,
	Eric Farman <farman@linux.ibm.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	qemu-stable@nongnu.org
Subject: Re: [PATCH] s390x/kvm: clamp stsi 3.2.2 size
Date: Fri, 26 Jun 2026 14:32:34 +0200	[thread overview]
Message-ID: <87o6gxlbx9.fsf@redhat.com> (raw)
In-Reply-To: <20260622092035.400959-1-borntraeger@linux.ibm.com>

On Mon, Jun 22 2026, Christian Borntraeger <borntraeger@linux.ibm.com> wrote:

> The stsi 3.2.2 page is being prepared by the kvm module and the size is
> clamped by the kernel. As the memory is mapped in the guest, another
> guest VCPU could race and overwrite the count and messing up the move
> operation. For any out of bound count, fall back to the kernel buffer.
>
> Cc: qemu-stable@nongnu.org
> Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
> ---
>  target/s390x/kvm/kvm.c | 9 +++++++++
>  1 file changed, 9 insertions(+)

Thanks, applied.



      parent reply	other threads:[~2026-06-26 12:33 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-22  9:20 [PATCH] s390x/kvm: clamp stsi 3.2.2 size Christian Borntraeger
2026-06-22 15:50 ` Eric Farman
2026-06-26 12:32 ` Cornelia Huck [this message]

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