Return-Path: Received: from mx3.wp.pl ([212.77.101.9]:15200 "EHLO mx3.wp.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754027AbcJZSIs (ORCPT ); Wed, 26 Oct 2016 14:08:48 -0400 Date: Wed, 26 Oct 2016 19:08:40 +0100 From: Jakub Kicinski To: Anna Schumaker Cc: Yotam Gigi , Andy Adamson , "linux-nfs@vger.kernel.org" , "netdev@vger.kernel.org" , Trond Myklebust , Yotam Gigi , mlxsw Subject: Re: nfs NULL-dereferencing in net-next Message-ID: <20161026190840.3d46dad8@jkicinski-Precision-T1700> In-Reply-To: References: <20161017201943.64529739@jkicinski-Precision-T1700> <817e43c5-d88d-e616-7074-5715de29d319@Netapp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-nfs-owner@vger.kernel.org List-ID: On Wed, 26 Oct 2016 16:15:24 +0000, Yotam Gigi wrote: > >-----Original Message----- > >From: Anna Schumaker [mailto:Anna.Schumaker@Netapp.com] > >Sent: Wednesday, October 26, 2016 5:40 PM > >To: Yotam Gigi ; Jakub Kicinski ; Andy > >Adamson ; Anna Schumaker > >; linux-nfs@vger.kernel.org > >Cc: netdev@vger.kernel.org; Trond Myklebust ; > >Yotam Gigi ; mlxsw > >Subject: Re: nfs NULL-dereferencing in net-next > > > >On 10/25/2016 01:19 PM, Yotam Gigi wrote: > >> > >>> -----Original Message----- > >>> From: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org] > >On > >>> Behalf Of Jakub Kicinski > >>> Sent: Monday, October 17, 2016 10:20 PM > >>> To: Andy Adamson ; Anna Schumaker > >>> ; linux-nfs@vger.kernel.org > >>> Cc: netdev@vger.kernel.org; Trond Myklebust > > > >>> Subject: nfs NULL-dereferencing in net-next > >>> > >>> Hi! > >>> > >>> I'm hitting this reliably on net-next, HEAD at 3f3177bb680f > >>> ("fsl/fman: fix error return code in mac_probe()"). > >> > >> > >> I see the same thing. It happens constantly on some of my machines, making > >them > >> completely unusable. > >> > >> I bisected it and got to the commit: > >> > >> commit 04ea1b3e6d8ed4978bb608c1748530af3de8c274 > >> Author: Andy Adamson > >> Date: Fri Sep 9 09:22:27 2016 -0400 > >> > >> NFS add xprt switch addrs test to match client > >> > >> Signed-off-by: Andy Adamson > >> Signed-off-by: Anna Schumaker > > > >Thanks for reporting on this everyone! Does this patch help? > > Actually, I still see the same bug with the same trace. I rebuild the latest net-next and I'm not seeing the trace any more... I'm only seeing this (with or without your patch): [ 23.465877] NFS: set_pnfs_layoutdriver: cl_exchange_flags 0x0 [ 23.473784] NFS: set_pnfs_layoutdriver: cl_exchange_flags 0x0 [ 23.588890] NFS: set_pnfs_layoutdriver: cl_exchange_flags 0x0 [ 23.596746] NFS: set_pnfs_layoutdriver: cl_exchange_flags 0x0 [ 23.781574] NFS: set_pnfs_layoutdriver: cl_exchange_flags 0x0 [ 23.789599] NFS: set_pnfs_layoutdriver: cl_exchange_flags 0x0 HTH