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[80.230.48.7]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48e538b26a3sm95210515e9.9.2026.05.06.08.15.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 May 2026 08:15:28 -0700 (PDT) Date: Wed, 6 May 2026 11:15:24 -0400 From: "Michael S. Tsirkin" To: Eric Dumazet Cc: Stefano Garzarella , "David S . Miller" , Jakub Kicinski , Paolo Abeni , Simon Horman , netdev@vger.kernel.org, eric.dumazet@gmail.com, Arseniy Krasnov , Stefan Hajnoczi , Jason Wang , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , kvm@vger.kernel.org, virtualization@lists.linux.dev Subject: Re: [PATCH net] vsock/virtio: fix potential unbounded skb queue Message-ID: <20260506111507-mutt-send-email-mst@kernel.org> References: <20260430122653.554058-1-edumazet@google.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: hpJOZ_6i1xUlQvpOdFgTKE2eW81qae5vXchC9q82rL0_1778080530 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, May 05, 2026 at 07:14:36AM -0700, Eric Dumazet wrote: > There is always a discrepancy between skb->len and skb->truesize. > You will not be able to announce a 1MB window, and accept one milliion > skb of 1-byte each. We can if we copy. > This kind of contract is broken.