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Mon, 21 Sep 2026 09:58:20 -0700 (PDT) Received: from localhost ([2a03:2880:2ff:5b::]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ddc178701csm37221245ad.13.2026.09.21.09.58.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Sep 2026 09:58:20 -0700 (PDT) Date: Mon, 21 Sep 2026 09:58:19 -0700 Message-ID: <76355a60e1b7e5d664d956e7a06c5900@gmail.com> From: Stanislav Fomichev To: netdev-bot+sashiko@kernel.org Cc: netdev@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, sdf@fomichev.me, bobbyeshleman@meta.com, almasrymina@google.com, linux-kernel@vger.kernel.org In-Reply-To: <178993807923.2160803.4802601925465816308@kernel.org> Subject: Re: Re: [PATCH net-next v3 2/3] net: devmem: embed net_iov_area in binding Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > [Severity: Medium] > Can this loop in net_devmem_bind_dmabuf() write past > binding->area.niovs[], binding->freelist[] and binding->tx_vec[]? I do not think this is real. io_uring checks this because I think area_reg->len is from userspace. For dmabufs, len should be sum(sg->len). You yourself claim: The in-tree exporters I looked at (udmabuf, dma-heaps, drm_prime) do build SG tables totalling dmabuf->size...