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[209.132.180.67]) by mx.google.com with ESMTP id 59si8529359plb.405.2019.03.12.05.04.16; Tue, 12 Mar 2019 05:04:38 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@hartkopp.net header.s=strato-dkim-0002 header.b=oUZXCL95; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726612AbfCLMC3 (ORCPT + 99 others); Tue, 12 Mar 2019 08:02:29 -0400 Received: from mo4-p01-ob.smtp.rzone.de ([85.215.255.53]:25789 "EHLO mo4-p01-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725844AbfCLMC2 (ORCPT ); Tue, 12 Mar 2019 08:02:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1552392143; s=strato-dkim-0002; d=hartkopp.net; h=In-Reply-To:Date:Message-ID:From:References:To:Subject: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=P5/PVrxkOtneOBmRAzRCH23Ow+mn9LtOrfvfD94JTQI=; b=oUZXCL958GhknvxpCYsX0KtwOAWpMzTar8o1xA/gTZAXGNeggsapWuiSDf0f5Oz41x yuo8i4fYBuBuKTW1shvUGna+mrwfnPh4LrbNRDf84Sz/0Z1+90wq2PXmfTbJqjjqATh4 ICnWaxmiRORJ/Nwnu2jf+c2WjAKjZd8Yfu688F0k8s8v3XVjuN0RNMDbW/6sd/UmSfGa jMHc6fyP1wJJtKn/W01k5TK6jxo+NijYUjzqlFB8NsqBzSby518OvgNL2xMDU1z8P4cL s7VurMDXbHoqCy+UsJEqqxeY5Qo9nhnJT6+isp09lsn0s8ifCRZwv+kApr/aSDWUS940 ouOg== X-RZG-AUTH: ":P2MHfkW8eP4Mre39l357AZT/I7AY/7nT2yrDxb8mjG14FZxedJy6qgO1onXMaVuOBdyp/nutbxfg" X-RZG-CLASS-ID: mo00 Received: from [192.168.1.119] by smtp.strato.de (RZmta 44.13 AUTH) with ESMTPSA id e06351v2CC1xuWH (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Tue, 12 Mar 2019 13:01:59 +0100 (CET) Subject: Re: WARNING in hsr_forward_skb To: syzbot , arvid.brodin@alten.se, axboe@fb.com, axboe@kernel.dk, davem@davemloft.net, hch@lst.de, linux-block@vger.kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, ming.lei@redhat.com, mkl@pengutronix.de, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <0000000000004cfa120583e1dfc3@google.com> From: Oliver Hartkopp Message-ID: <7dd5ffca-803d-9d5e-7fa4-f9eed2249d26@hartkopp.net> Date: Tue, 12 Mar 2019 13:01:54 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <0000000000004cfa120583e1dfc3@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, I'm not sure why a Kernel 4.12.0-rc2+ is used here, but I do not get any problems on the my latest 5.0.0-06622-g1fc1cd8399ab tree and I strongly assume this patch showing up in 4.12-rc6 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?id=74b7b490886852582d986a33443c2ffa50970169 fixes the problem. Best regards, Oliver On 3/12/19 9:57 AM, syzbot wrote: > syzbot has bisected this bug to: > > commit ab42f35d9cb5ac49b5a2a11f940e74f58f207280 > Author: Ming Lei > Date:   Fri May 26 11:53:19 2017 +0000 > >     blk-mq: merge bio into sw queue before plugging > > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16e68713200000 > start commit:   ab42f35d blk-mq: merge bio into sw queue before plugging > git tree:       upstream > final crash:    https://syzkaller.appspot.com/x/report.txt?x=15e68713200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=11e68713200000 > kernel config:  https://syzkaller.appspot.com/x/.config?x=5e7dc790609552d7 > dashboard link: > https://syzkaller.appspot.com/bug?extid=fdce8f2a8903f3ba0e6b > userspace arch: amd64 > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15f6d1fd400000 > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17290fdd400000 > > Reported-by: syzbot+fdce8f2a8903f3ba0e6b@syzkaller.appspotmail.com > Fixes: ab42f35d ("blk-mq: merge bio into sw queue before plugging")