From: sashiko-bot@kernel.org
To: "Claudio Imbrenda" <imbrenda@linux.ibm.com>
Cc: linux-s390@vger.kernel.org, "Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>
Subject: Re: [PATCH v1 09/10] KVM: s390: vsie: Fix pinning using the wrong flag
Date: Thu, 22 Oct 2026 16:02:19 +0000 [thread overview]
Message-ID: <sashiko-outbox-181750@kernel.org> (raw)
In-Reply-To: <20261022155531.204593-10-imbrenda@linux.ibm.com>
> When pinning guest memory using pin_blocks(), gfn_to_page() was used,
> which under the hood uses FOLL_GET, which is the wrong type of flag for
> memory that is accessed directly by hardware.
>
> Fix by using kvm_vcpu_{,un}map(), which uses FOLL_PIN and is the
> correct thing to do.
>
> While technically a bugfix, the previous behaviour can only lead to
> guest corruption in extremely convoluted test scenarios that cannot
> happen in real/production systems.
>
> Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261022155531.204593-1-imbrenda@linux.ibm.com?part=9
next prev parent reply other threads:[~2026-10-22 16:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-22 15:55 [PATCH v1 00/10] KVM: s390: Misc bugfixes and improvements for 7.4 Claudio Imbrenda
2026-10-22 15:55 ` [PATCH v1 01/10] KVM: s390: Move some skey functions to headers Claudio Imbrenda
2026-10-22 15:58 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 02/10] KVM: s390: Refactor and improve DAT tables handling Claudio Imbrenda
2026-10-22 16:05 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 03/10] KVM: s390: Move prefix marker from PGSTEs to PTEs Claudio Imbrenda
2026-10-22 16:06 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 04/10] KVM: s390: Automatically enable storage keys for UCONTROL VMs Claudio Imbrenda
2026-10-22 16:13 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 05/10] KVM: s390: Replace ASCE usage with a struct with more flags Claudio Imbrenda
2026-10-22 16:09 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 06/10] KVM: s390: Rework some helper functions Claudio Imbrenda
2026-10-22 16:00 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 07/10] KVM: s390: Fix UCONTROL inconsistencies Claudio Imbrenda
2026-10-22 17:00 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 08/10] KVM: s390: Improve unmapping of large ranges Claudio Imbrenda
2026-10-22 16:53 ` sashiko-bot
2026-10-22 15:55 ` [PATCH v1 09/10] KVM: s390: vsie: Fix pinning using the wrong flag Claudio Imbrenda
2026-10-22 16:02 ` sashiko-bot [this message]
2026-10-22 15:55 ` [PATCH v1 10/10] KVM: s390: Enable 1M pages by default Claudio Imbrenda
2026-10-22 16:11 ` sashiko-bot
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