From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2D921315D5D; Thu, 21 May 2026 02:10:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779329405; cv=none; b=Kibkp1Fy5XwgT/PE7S7M7tDTBmlKcZLmy1p/bgEYq1zDyFP4bqbXRhWCNjLiZY6iLIllQCD9MtAJN7dE7XI5Tp0Z6TGYlL2o2ElY2se3d2/j6GDL2mVlqs7j18VBduP3ByHCt6VI3Hy14PSXqumzDye6DAhv4YaJYBOj5gCEcME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779329405; c=relaxed/simple; bh=UgYPH//PtIThmGBRE1rQCbe17dkIJeEgIMyoDso9+0Y=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=IqsCYtcbpN6ota3lWB2fxLmrwjowilM08JxDLHO2DBk3QBZHLt2lYUqwIOLcFsAz00I5gCOLYzDJ5UCz6RM5tMBGxSHUEPWZOXCYwPuDELYq1L5RnWqCN8A4kuPDWrHgXxQp7IlpcaW1qGPgBVkQ4aw859bZw+qczXXEUIIYHXA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AjF0/8jo; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AjF0/8jo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DA55C1F000E9; Thu, 21 May 2026 02:10:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779329403; bh=lNNBqfilNDalwRsLUsQpgAa9WZH9o3YarCwOCqbWowU=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=AjF0/8jo0zDSNgtNGq+Zf63ZK8MQC4s8snyW85Vx5djgM081bRlHqpqU9YlhS5HDw oBedSHGVwfZqBSiLf8OTjRKGs8kD/ams9MKxiW5fKKIda4lVx/HcViQdecTBlOll+J e1XqeMpcaBy/6siT5NlodIUuIO7xux3RVLJB/DqomkYvYLqylJ+M5bOsNZ7h8GSF8B qmgwVaTEYl98uS+W3WeyW7+02FpcPU4z0YXEf0UY8sCInkzA2s7/s+hPXaUwaH9+jJ vXGxM+tczF0Wjn6fv5d8QguhydySDzn4pqGLV8fTcU/wyx8xIPzh24AzXrsR738mIP ulEEyxwdyD6dA== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 4BAEB3930C38; Thu, 21 May 2026 02:10:15 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net v2] net: devmem: reject dma-buf bind with non-page-aligned size or SG length From: patchwork-bot+netdevbpf@kernel.org Message-Id: <177932941389.3832404.9587362354062605317.git-patchwork-notify@kernel.org> Date: Thu, 21 May 2026 02:10:13 +0000 References: <20260519203530.66310-1-devnexen@gmail.com> In-Reply-To: <20260519203530.66310-1-devnexen@gmail.com> To: David CARLIER Cc: netdev@vger.kernel.org, stable@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, sdf@fomichev.me, sdf.kernel@gmail.com, kaiyuanz@google.com, almasrymina@google.com, bobbyeshleman@gmail.com, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Tue, 19 May 2026 21:35:30 +0100 you wrote: > net_devmem_bind_dmabuf() trusts dmabuf->size and sg_dma_len() to be > PAGE_SIZE multiples without checking: > > - tx_vec is sized dmabuf->size / PAGE_SIZE, and > net_devmem_get_niov_at() only bounds-checks virt_addr < dmabuf->size > before indexing tx_vec[virt_addr / PAGE_SIZE]. With size = > N*PAGE_SIZE + r (1 <= r < PAGE_SIZE), sendmsg() at iov_base = > N*PAGE_SIZE passes the bound check and reads tx_vec[N] -- one past. > > [...] Here is the summary with links: - [net,v2] net: devmem: reject dma-buf bind with non-page-aligned size or SG length https://git.kernel.org/netdev/net/c/4eb82ba54342 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html