linux-kernel - Re: [PATCH net v2 1/3] virtio-net: ensure the received length does not exceed allocated size

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Message-ID: <CACGkMEuJk=PF2aGQj4FNhSv=VvOTzruK6PMpEykB9MVHwU4nDw@mail.gmail.com>
Date: Tue, 1 Jul 2025 10:19:53 +0800
From: Jason Wang <jasowang@...hat.com>
To: Bui Quang Minh <minhquangbui99@...il.com>
Cc: netdev@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>, 
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Eugenio Pérez <eperezma@...hat.com>, 
	Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Jesper Dangaard Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>, 
	Stanislav Fomichev <sdf@...ichev.me>, virtualization@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH net v2 1/3] virtio-net: ensure the received length does
 not exceed allocated size

On Mon, Jun 30, 2025 at 10:42 PM Bui Quang Minh
<minhquangbui99@...il.com> wrote:
>
> In xdp_linearize_page, when reading the following buffers from the ring,
> we forget to check the received length with the true allocate size. This
> can lead to an out-of-bound read. This commit adds that missing check.
>
> Cc: <stable@...r.kernel.org>
> Fixes: 4941d472bf95 ("virtio-net: do not reset during XDP set")
> Signed-off-by: Bui Quang Minh <minhquangbui99@...il.com>

Acked-by: Jason Wang <jasowang@...hat.com>

Thanks