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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 9E57CECDFAA for ; Mon, 16 Jul 2018 21:45:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 61E2F208E8 for ; Mon, 16 Jul 2018 21:45:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 61E2F208E8 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 S1730745AbeGPWPK (ORCPT ); Mon, 16 Jul 2018 18:15:10 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:60782 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728290AbeGPWPJ (ORCPT ); Mon, 16 Jul 2018 18:15:09 -0400 Received: from localhost (74-93-104-98-Washington.hfc.comcastbusiness.net [74.93.104.98]) (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 3129B13EA8047; Mon, 16 Jul 2018 14:45:50 -0700 (PDT) Date: Mon, 16 Jul 2018 14:45:49 -0700 (PDT) Message-Id: <20180716.144549.1700210071419801130.davem@davemloft.net> To: ubraun@linux.ibm.com Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, linux-kernel@vger.kernel.org, eric.dumazet@gmail.com, lifeasageek@gmail.com, sbrivio@redhat.com Subject: Re: [PATCH net V2 1/1] net/smc: take sock lock in smc_ioctl() From: David Miller In-Reply-To: <20180716115652.72331-1-ubraun@linux.ibm.com> References: <20180716115652.72331-1-ubraun@linux.ibm.com> X-Mailer: Mew version 6.7 on Emacs 25.3 / Mule 6.0 (HANACHIRUSATO) 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, 16 Jul 2018 14:45:50 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ursula Braun Date: Mon, 16 Jul 2018 13:56:52 +0200 > From: Ursula Braun > > SMC ioctl processing requires the sock lock to work properly in > all thinkable scenarios. > Problem has been found with RaceFuzzer and fixes: > KASAN: null-ptr-deref Read in smc_ioctl > > Reported-by: Byoungyoung Lee > Reported-by: syzbot+35b2c5aa76fd398b9fd4@syzkaller.appspotmail.com > Signed-off-by: Ursula Braun Applied and queued up for -stable.