From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 190BEC433E6 for ; Tue, 2 Feb 2021 17:13:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D26A964ECE for ; Tue, 2 Feb 2021 17:13:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237234AbhBBRMz (ORCPT ); Tue, 2 Feb 2021 12:12:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:35580 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236891AbhBBQvA (ORCPT ); Tue, 2 Feb 2021 11:51:00 -0500 Received: by mail.kernel.org (Postfix) with ESMTPS id 8C0A964F95; Tue, 2 Feb 2021 16:50:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1612284607; bh=YazcG+BE+q7PioHb/BdTLj8HKtycWtsJz+EN2jWSj8Q=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=lrcNopUwcij1KTBBtaOTQRKS60NKrNuGrxvsNqwxqPgPIyEJpxbwhIUOwaXgQIZkH gmHlNw+GXHLp7gE/V+IvUydtgngbMceoY/jPgq0xPR7PGH28e2B6b43/WLTu9i5C// S2z9VT8i8Gpk/Ba4YxfN7vLO36gC+DhvRM1hvL3NuenrGgJQmP5ZGwtmif2s0EV6JG DhW6jrXBv61XkAvySiP/2nHBlMUDDWZfSFpff1PW83coYiLnjlRfMNch4E5WGzjWcp 78NbvZHvv2HqpcGIKl/0qnIy6tF2ynE40mETWn8wJxWprppFCe9B2Mbv5t6hvIj+MJ 5vo2Vj1CzOZAA== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH] net/rds: restrict iovecs length for RDS_CMSG_RDMA_ARGS From: patchwork-bot+netdevbpf@kernel.org Message-Id: <161228460753.23213.15174614823787574149.git-patchwork-notify@kernel.org> Date: Tue, 02 Feb 2021 16:50:07 +0000 References: <20210201203233.1324704-1-snovitoll@gmail.com> In-Reply-To: <20210201203233.1324704-1-snovitoll@gmail.com> To: Sabyrzhan Tasbolatov Cc: santosh.shilimkar@oracle.com, davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-kernel@vger.kernel.org, syzbot+1bd2b07f93745fa38425@syzkaller.appspotmail.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net.git (refs/heads/master): On Tue, 2 Feb 2021 02:32:33 +0600 you wrote: > syzbot found WARNING in rds_rdma_extra_size [1] when RDS_CMSG_RDMA_ARGS > control message is passed with user-controlled > 0x40001 bytes of args->nr_local, causing order >= MAX_ORDER condition. > > The exact value 0x40001 can be checked with UIO_MAXIOV which is 0x400. > So for kcalloc() 0x400 iovecs with sizeof(struct rds_iovec) = 0x10 > is the closest limit, with 0x10 leftover. > > [...] Here is the summary with links: - net/rds: restrict iovecs length for RDS_CMSG_RDMA_ARGS https://git.kernel.org/netdev/net/c/a11148e6fcce You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html