Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752963AbdF0O2W (ORCPT ); Tue, 27 Jun 2017 10:28:22 -0400 Received: from mx0a-00010702.pphosted.com ([148.163.156.75]:40074 "EHLO mx0b-00010702.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752448AbdF0O2P (ORCPT ); Tue, 27 Jun 2017 10:28:15 -0400 Date: Tue, 27 Jun 2017 09:27:57 -0500 From: Julia Cartwright To: Feng Feng24 Liu CC: Sebastian Andrzej Siewior , "Steven Rostedt" , Mike Galbraith , "linux-kernel@vger.kernel.org" , "linux-rt-users@vger.kernel.org" Subject: Re: BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 !//RE: kernel BUG at kernel/locking/rtmutex.c:1027 Message-ID: <20170627142757.GA1463@jcartwri.amer.corp.natinst.com> References: <2B18E8E1DDAE074A82D1060396451DAE263CBBD6@CNMAILEX04.lenovo.com> <20170626102418.310bb1ce@gandalf.local.home> <20170626145436.npgsaz4eyvnh2j2k@linutronix.de> <20170626155555.GB8190@jcartwri.amer.corp.natinst.com> <2B18E8E1DDAE074A82D1060396451DAE263CC234@CNMAILEX04.lenovo.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="X1bOJ3K7DJ5YkBrT" Content-Disposition: inline In-Reply-To: <2B18E8E1DDAE074A82D1060396451DAE263CC234@CNMAILEX04.lenovo.com> User-Agent: Mutt/1.8.3 (2017-05-23) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-06-27_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=30 priorityscore=1501 malwarescore=0 suspectscore=12 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=30 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1706270234 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1197 Lines: 35 --X1bOJ3K7DJ5YkBrT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Jun 27, 2017 at 05:47:41AM +0000, Feng Feng24 Liu wrote: > Hi, Julia > Thanks for your kindly hit. I will try this patch > The problem is accidental. I will try to reproduce it. > BTW, could you help to give the link about the emails which > discuss about " nsfs: mark dentry with DCACHE_RCUACCESS ". I > cannot find them(just patch email) Conversation upstream started with a syzkaller-found problem here: https://marc.info/?l=linux-netdev&m=149183505630266&w=2 Hopefully that helps, Julia --X1bOJ3K7DJ5YkBrT Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEgKAEF431w1EL96k9jNrC4UVNdG8FAllSa2kACgkQjNrC4UVN dG+MUQf/b5Ds0I3B4ibikDFliEabVJIsRFTSvUpbr9nMeSokcgoZb8HdMLcD5vfI jXsoIhBMtn3dF5G2t6YmJjlWIAswpjHOwjcJPuLD29LA4fZrgUoB1xHTZTlC8TsC Kd//WNdR2Zehb+7klsxiba8cNM+05lMTxfodvDalERok2P2pW35WiTuM3lAgYVNl g1CKVSPFLpwrwdwo64yJBdH4QsDaIAi+C1wd9qLvwp7dw2GJyCi1OOWXBD8M1sxY FcOdHQC0hP+A8AZvrqfKJ3/3G8MbEnwihiPAt1FMD9lH828U/Ge35g7vUqG94uHD 3Q3633wbHSL7P8wsX+QOrsSJbR78jw== =jOSh -----END PGP SIGNATURE----- --X1bOJ3K7DJ5YkBrT--