From: 성병찬 <tjdqudcks0424@naver.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "James E . J . Bottomley" <James.Bottomley@hansenpartnership.com>,
"Martin K . Petersen" <mkp@kernel.org>,
"Jason Wang" <jasowangio@gmail.com>,
linux-scsi@vger.kernel.org, virtualization@lists.linux.dev,
linux-kernel@vger.kernel.org, security@kernel.org
Subject: Re: [BUG] scsi: short virtio-scsi VPD response exposes stale heap data
Date: Tue, 06 Oct 2026 18:40:54 +0900 [thread overview]
Message-ID: <96622e4086e5fb77b8148631fa6ca16e@cweb003.nm> (raw)
In-Reply-To: <20261006052300-mutt-send-email-mst@kernel.org>
Yes, that is a fair summary.
More precisely, a short successful virtio-scsi response causes the
guest kernel to cache bytes that were not supplied by the device and
expose them through the world-readable VPD sysfs attribute.
The guest-kernel heap disclosure is reproducible. I agree that its
security classification depends on whether the virtio-scsi
device/backend is considered trusted in the relevant threat model.
Would validating and propagating the actual virtqueue used length be
worthwhile as a robustness fix?
Regards,
sungbyeongchan
next prev parent reply other threads:[~2026-10-06 9:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 9:11 sungbyeongchan
2026-10-06 9:25 ` Michael S. Tsirkin
2026-10-06 9:40 ` 성병찬 [this message]
2026-10-06 9:49 ` Michael S. Tsirkin
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