From: sashiko-bot@kernel.org
To: "Shubham Antil" <shubham@octane.security>,
virtualization@lists.linux.dev
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
"Eugenio Perez" <eperezma@redhat.com>
Subject: Re: [PATCH v3] vhost-scsi: zero misaligned I/O bounce pages
Date: Tue, 20 Oct 2026 10:58:05 +0000 [thread overview]
Message-ID: <sashiko-outbox-178866@kernel.org> (raw)
In-Reply-To: <20261020105503.75904-1-shubham@octane.security>
> The misaligned I/O fallback copies the full bounce scatterlist to the
> request buffer during completion. If a data-in command transfers less
> than requested, part of a newly allocated bounce page can remain unwritten.
>
> Allocate bounce pages with __GFP_ZERO so all bytes copied during completion
> have a defined value. This path is already the slow fallback for
> misaligned I/O, so the added initialization cost is acceptable.
>
> Found during an LLM-assisted source audit and validated with a QEMU/KVM
> vhost-scsi target using misaligned data-in commands.
>
> Fixes: 5ced58bfa132 ("vhost-scsi: Fix alignment handling with windows")
> Cc: stable@vger.kernel.org
> Assisted-by: LLM (OpenAI Codex, gpt-5.6-sol)
> Signed-off-by: Shubham Antil <shubham@octane.security>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261020105503.75904-1-shubham@octane.security?part=1
next prev parent reply other threads:[~2026-10-20 10:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-20 10:55 [PATCH v3] vhost-scsi: zero misaligned I/O bounce pages Shubham Antil
2026-10-20 10:58 ` sashiko-bot [this message]
2026-10-20 23:32 ` Mike Christie
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