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=-3.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 6DF07C04EB8 for ; Mon, 10 Dec 2018 19:54:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 370AF20821 for ; Mon, 10 Dec 2018 19:54:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 370AF20821 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729350AbeLJTyg (ORCPT ); Mon, 10 Dec 2018 14:54:36 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:43552 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726677AbeLJTyf (ORCPT ); Mon, 10 Dec 2018 14:54:35 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::bf5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 94E071473814A; Mon, 10 Dec 2018 11:54:34 -0800 (PST) Date: Mon, 10 Dec 2018 11:54:33 -0800 (PST) Message-Id: <20181210.115433.42616985092042285.davem@davemloft.net> To: lucien.xin@gmail.com Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-sctp@vger.kernel.org, marcelo.leitner@gmail.com, nhorman@tuxdriver.com Subject: Re: [PATCH net] sctp: initialize sin6_flowinfo for ipv6 addrs in sctp_inet6addr_event From: David Miller In-Reply-To: <4c3dc15beee77a541042f79f35702574347dffc9.1544436052.git.lucien.xin@gmail.com> References: <4c3dc15beee77a541042f79f35702574347dffc9.1544436052.git.lucien.xin@gmail.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 10 Dec 2018 11:54:34 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xin Long Date: Mon, 10 Dec 2018 18:00:52 +0800 > syzbot reported a kernel-infoleak, which is caused by an uninitialized > field(sin6_flowinfo) of addr->a.v6 in sctp_inet6addr_event(). > The call trace is as below: ... > sin6_flowinfo is not really used by SCTP, so it will be fixed by simply > setting it to 0. > > The issue exists since very beginning. > Thanks Alexander for the reproducer provided. > > Reported-by: syzbot+ad5d327e6936a2e284be@syzkaller.appspotmail.com > Signed-off-by: Xin Long Applied and queued up for -stable, thanks Xin.