From: Luigi Leonardi <leonardi@redhat.com>
To: "Stefan Hajnoczi" <stefanha@redhat.com>,
"Stefano Garzarella" <sgarzare@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Jason Wang" <jasowang@redhat.com>,
"Xuan Zhuo" <xuanzhuo@linux.alibaba.com>,
"Eugenio Pérez" <eperezma@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Simon Horman" <horms@kernel.org>,
"Arseniy Krasnov" <avkrasnov@salutedevices.com>
Cc: kvm@vger.kernel.org, virtualization@lists.linux.dev,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Luigi Leonardi <leonardi@redhat.com>
Subject: [PATCH net 0/2] vsock/virtio: fix MSG_PEEK calculation on bytes to copy
Date: Thu, 02 Apr 2026 10:18:00 +0200 [thread overview]
Message-ID: <20260402-fix_peek-v1-0-ad274fcef77b@redhat.com> (raw)
`virtio_transport_stream_do_peek`, when calculating the number of bytes to copy,
didn't consider the `offset`, caused by partial reads that happend before.
This might cause out-of-bounds read that lead to an EFAULT.
More details in the commit.
Commit 1 introduces the fix
Commit 2 introduces a test that checks for this bug to avoid future
regressions.
Signed-off-by: Luigi Leonardi <leonardi@redhat.com>
---
Luigi Leonardi (2):
vsock/virtio: fix MSG_PEEK ignoring skb offset when calculating bytes to copy
vsock/test: add MSG_PEEK after partial recv test
net/vmw_vsock/virtio_transport_common.c | 5 ++-
tools/testing/vsock/vsock_test.c | 64 +++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 3 deletions(-)
---
base-commit: 9147566d801602c9e7fc7f85e989735735bf38ba
change-id: 20260401-fix_peek-6837b83469e3
Best regards,
--
Luigi Leonardi <leonardi@redhat.com>
next reply other threads:[~2026-04-02 8:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-02 8:18 Luigi Leonardi [this message]
2026-04-02 8:18 ` [PATCH net 1/2] vsock/virtio: fix MSG_PEEK ignoring skb offset when calculating bytes to copy Luigi Leonardi
2026-04-02 13:08 ` Stefano Garzarella
2026-04-05 19:22 ` Arseniy Krasnov
2026-04-02 8:18 ` [PATCH net 2/2] vsock/test: add MSG_PEEK after partial recv test Luigi Leonardi
2026-04-02 13:28 ` Stefano Garzarella
2026-04-03 11:40 ` Luigi Leonardi
2026-04-05 19:14 ` Arseniy Krasnov
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