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=-0.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_RHS_DOB autolearn=no 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 7C0D7C4BA06 for ; Wed, 26 Feb 2020 00:44:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2F05921D7E for ; Wed, 26 Feb 2020 00:44:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729081AbgBZAol (ORCPT ); Tue, 25 Feb 2020 19:44:41 -0500 Received: from out20-50.mail.aliyun.com ([115.124.20.50]:56444 "EHLO out20-50.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728989AbgBZAol (ORCPT ); Tue, 25 Feb 2020 19:44:41 -0500 X-Alimail-AntiSpam: AC=CONTINUE;BC=0.07055607|-1;CH=green;DM=CONTINUE|CONTINUE|true|0.395781-0.00784535-0.596374;DS=CONTINUE|ham_system_inform|0.0246271-0.000720599-0.974652;FP=0|0|0|0|0|0|0|0;HT=e02c03312;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=4;RT=4;SR=0;TI=SMTPD_---.GsUQrkp_1582677876; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.GsUQrkp_1582677876) by smtp.aliyun-inc.com(10.147.41.187); Wed, 26 Feb 2020 08:44:36 +0800 Date: Wed, 26 Feb 2020 08:44:39 +0800 From: Wang Yugui To: Maor Gottlieb Subject: Re: a bug(BUG: kernel NULL pointer dereference) of ib or mlx happened in 5.4.21 but not in 5.4.20 Cc: Leon Romanovsky , Chuck Lever , linux-rdma In-Reply-To: References: <20200221002631.97A1.409509F4@e16-tech.com> Message-Id: <20200226084438.9265.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------_5E55BDEB000000009266_MULTIPART_MIXED_" Content-Transfer-Encoding: 8bit X-Mailer: Becky! ver. 2.74.03 [en] Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --------_5E55BDEB000000009266_MULTIPART_MIXED_ Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: 8bit Hi, Maor, Leon The kernel 5.4.21 plus the two patches successfully boot now without the NULL pointer problem. And nfs4/rdma sucessfully mount too. #RDMA-core-Fix-use-of-logical-OR-in-get_new_pps.patch #RDMA-core-fix-null.patch (the patch from Maor saved as git-am format) My MCX354A have 2 port, and port 1 is set as InfiniBand, port 2 is set as Ethernet. # ibstat CA 'mlx4_0' CA type: MT4099 Number of ports: 2 Firmware version: 2.42.5000 Hardware version: 1 Node GUID: 0xe41d2d03007b4080 System image GUID: 0xe41d2d03007b4083 Port 1: State: Down Physical state: Polling Rate: 10 Base lid: 0 LMC: 0 SM lid: 0 Capability mask: 0x02594868 Port GUID: 0xe41d2d03007b4081 Link layer: InfiniBand Port 2: State: Down Physical state: Disabled Rate: 40 Base lid: 0 LMC: 0 SM lid: 0 Capability mask: 0x00010000 Port GUID: 0xe61d2dfffe7b4082 Link layer: Ethernet # mlxup Querying Mellanox devices firmware ... Device #1: ---------- Device Type: ConnectX3 Part Number: 01T7NW Description: ConnectX-3 VPI adapter; dual-port QSFP; FDR IB (56Gb/s) and 40GbE;PCIe3.0 x8 8GT/s; Dell PowerEdge PSID: DEL1090001019 PCI Device Name: 0000:84:00.0 Port1 GUID: e41d2d03007b4081 Port2 MAC: e41d2d7b4082 Versions: Current Available FW 2.42.5000 N/A PXE 3.4.0752 N/A Status: No matching image found My server is a dell PowerEdge T630 with some other NIC cards. # rxe_cfg Name Link Driver Speed NMTU IPv4_addr RDEV RMTU em1 yes igb 1500 192.168.2.63 em2 no igb 1500 p1p1 no bnx2x 10GigE 9000 10.0.0.63 p1p2 no bnx2x 10GigE 9000 10.0.1.63 p6p2 no mlx4_en 9000 10.40.1.63 virbr0 no bridge 1500 192.168.122.1 virbr0-nic no tun 1500 Best Regards 王玉贵 2020/02/26 > On 2/20/2020 6:26 PM, Wang Yugui wrote: > > Hi, Leon, Chuck > > > > It is still broken even with the hotfix(https://patchwork.kernel.org/patch/11387567/) for 5.4.21. > > Hi Wang, > > How can I reproduce it ? > > Can you please try with the below diff? > > iff --git a/drivers/infiniband/core/security.c b/drivers/infiniband/core/security.c > index b9a36ea244d4..2d5608315dc8 100644 > --- a/drivers/infiniband/core/security.c > +++ b/drivers/infiniband/core/security.c > @@ -340,11 +340,15 @@ static struct ib_ports_pkeys *get_new_pps(const struct ib_qp *qp, > ??????????????? return NULL; > > ??????? if (qp_attr_mask & IB_QP_PORT) > -?????????? new_pps->main.port_num = > -?????????????????? (qp_pps) ? qp_pps->main.port_num : qp_attr->port_num; > +???????? new_pps->main.port_num = qp_attr->port_num; > + else if (qp_pps) > +???????? new_pps->main.port_num = qp_pps->main.port_num; > + > ??????? if (qp_attr_mask & IB_QP_PKEY_INDEX) > -?????????? new_pps->main.pkey_index = (qp_pps) ? qp_pps->main.pkey_index : > - qp_attr->pkey_index; > +???????? new_pps->main.pkey_index = qp_attr->pkey_index; > + else if (qp_pps) > +???????? new_pps->main.pkey_index = qp_pps->main.pkey_index; > + > ??????? if ((qp_attr_mask & IB_QP_PKEY_INDEX) && (qp_attr_mask & IB_QP_PORT)) > ??????????????? new_pps->main.state = IB_PORT_PKEY_VALID; > > > > > the call stack is almost the same. > > > > Feb 20 23:49:53 T630 kernel: Call Trace: > > Feb 20 23:49:53 T630 kernel: port_pkey_list_insert+0x30/0x1a0 [ib_core] > > Feb 20 23:49:53 T630 kernel: ? kmem_cache_alloc_trace+0x219/0x230 > > Feb 20 23:49:53 T630 kernel: ib_security_modify_qp+0x244/0x3b0 [ib_core] > > Feb 20 23:49:53 T630 kernel: _ib_modify_qp+0x1c0/0x3c0 [ib_core] > > Feb 20 23:49:53 T630 kernel: ? dma_pool_free+0x24/0xc0 > > Feb 20 23:49:53 T630 kernel: ipoib_init_qp+0x77/0x190 [ib_ipoib] > > Feb 20 23:49:53 T630 kernel: ? __mlx4_ib_query_pkey+0xe7/0x110 [mlx4_ib] > > Feb 20 23:49:53 T630 kernel: ? ib_find_pkey+0x98/0xe0 [ib_core] > > Feb 20 23:49:53 T630 kernel: ipoib_ib_dev_open_default+0x1a/0x180 [ib_ipoib] > > Feb 20 23:49:53 T630 kernel: ipoib_ib_dev_open+0x66/0xa0 [ib_ipoib] > > Feb 20 23:49:53 T630 kernel: ipoib_open+0x44/0x110 [ib_ipoib] > > Feb 20 23:49:53 T630 kernel: __dev_open+0xcd/0x160 > > Feb 20 23:49:53 T630 kernel: __dev_change_flags+0x1ad/0x220 > > Feb 20 23:49:53 T630 kernel: ? __dev_notify_flags+0x95/0xf0 > > Feb 20 23:49:53 T630 kernel: dev_change_flags+0x21/0x60 > > Feb 20 23:49:53 T630 kernel: do_setlink+0x320/0xf00 > > Feb 20 23:49:53 T630 kernel: ? __nla_validate_parse+0x51/0x840 > > Feb 20 23:49:53 T630 kernel: ? xas_load+0x8/0x80 > > Feb 20 23:49:53 T630 kernel: ? __update_load_avg_cfs_rq+0x1d5/0x2c0 > > Feb 20 23:49:53 T630 kernel: ? cpumask_next+0x17/0x20 > > Feb 20 23:49:53 T630 kernel: ? __snmp6_fill_stats64.isra.56+0x6b/0x110 > > Feb 20 23:49:53 T630 kernel: ? __nla_validate_parse+0x51/0x840 > > Feb 20 23:49:53 T630 kernel: __rtnl_newlink+0x53d/0x890 > > Feb 20 23:49:53 T630 kernel: ? __nla_reserve+0x38/0x50 > > Feb 20 23:49:53 T630 kernel: ? __nla_put+0xc/0x20 > > Feb 20 23:49:53 T630 kernel: ? __nla_reserve+0x38/0x50 > > Feb 20 23:49:53 T630 kernel: ? __nla_put+0xc/0x20 > > Feb 20 23:49:53 T630 kernel: ? nla_put+0x2f/0x40 > > Feb 20 23:49:53 T630 kernel: ? __nla_reserve+0x38/0x50 > > Feb 20 23:49:53 T630 kernel: ? __nla_put+0xc/0x20 > > Feb 20 23:49:53 T630 kernel: ? nla_put+0x2f/0x40 > > Feb 20 23:49:53 T630 kernel: ? rt6_fill_node+0x2d4/0x850 > > Feb 20 23:49:53 T630 kernel: ? _cond_resched+0x15/0x30 > > Feb 20 23:49:53 T630 kernel: ? kmem_cache_alloc_trace+0x1c9/0x230 > > Feb 20 23:49:53 T630 kernel: rtnl_newlink+0x43/0x60 > > Feb 20 23:49:53 T630 kernel: rtnetlink_rcv_msg+0x2b1/0x360 > > Feb 20 23:49:53 T630 kernel: ? __kmalloc_node_track_caller+0x241/0x300 > > Feb 20 23:49:53 T630 kernel: ? _cond_resched+0x15/0x30 > > Feb 20 23:49:53 T630 kernel: ? rtnl_calcit.isra.32+0x110/0x110 > > Feb 20 23:49:53 T630 kernel: netlink_rcv_skb+0x49/0x110 > > Feb 20 23:49:53 T630 kernel: netlink_unicast+0x191/0x220 > > Feb 20 23:49:53 T630 kernel: netlink_sendmsg+0x21d/0x3f0 > > Feb 20 23:49:53 T630 kernel: sock_sendmsg+0x5b/0x60 > > Feb 20 23:49:53 T630 kernel: ____sys_sendmsg+0x1eb/0x260 > > Feb 20 23:49:53 T630 kernel: ? copy_msghdr_from_user+0xdb/0x160 > > Feb 20 23:49:53 T630 kernel: ___sys_sendmsg+0x7c/0xc0 > > Feb 20 23:49:53 T630 kernel: ? do_filp_open+0xa7/0x100 > > Feb 20 23:49:53 T630 kernel: ? netdev_run_todo+0x5e/0x290 > > Feb 20 23:49:53 T630 kernel: ? list_lru_add+0xb7/0x1d0 > > Feb 20 23:49:53 T630 kernel: __sys_sendmsg+0x57/0xa0 > > Feb 20 23:49:53 T630 kernel: do_syscall_64+0x5b/0x180 > > Feb 20 23:49:53 T630 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > > > > > This card have 2 port, and port 1 is set as InfiniBand, port 2 > > is set as Ethernet. > > > > # ibstat > > CA 'mlx4_0' > > CA type: MT4099 > > Number of ports: 2 > > Firmware version: 2.42.5000 > > Hardware version: 1 > > Node GUID: 0xe41d2d03007b4080 > > System image GUID: 0xe41d2d03007b4083 > > Port 1: > > State: Down > > Physical state: Polling > > Rate: 10 > > Base lid: 0 > > LMC: 0 > > SM lid: 0 > > Capability mask: 0x02594868 > > Port GUID: 0xe41d2d03007b4081 > > Link layer: InfiniBand > > Port 2: > > State: Down > > Physical state: Disabled > > Rate: 40 > > Base lid: 0 > > LMC: 0 > > SM lid: 0 > > Capability mask: 0x00010000 > > Port GUID: 0xe61d2dfffe7b4082 > > Link layer: Ethernet > > > > > > Best Regards > > 王玉贵 > > 2020/02/21 > > > >> On Thu, Feb 20, 2020 at 08:57:29AM -0500, Chuck Lever wrote: > >>> Hello! > >>> > >>> Thanks for your bug report. > >>> > >>> > >>>> On Feb 19, 2020, at 10:22 PM, Wang Yugui wrote: > >>>> > >>>> Hi, chuck.lever > >>>> > >>>> a bug(BUG: kernel NULL pointer dereference) of ib or mlx happened in 5.4.21 but not in 5.4.20. > >>>> > >>>> maybe some releationship to xprtrdma-fix-dma-scatter-gather-list-mapping-imbalance.patch > >>> I don't see an obvious connection to fix-dma-scatter-gather-list-mapping-imbalance. > >>> The backtrace below is through IPoIB code paths. Those have nothing to do with > >>> NFS/RDMA, which is the only ULP code that is changed by my commit. > >>> > >>> > >>>> maybe the info is useful. > >>> I'm copying linux-rdma for a bigger set of eyeballs. > >>> > >>> My knee-jerk recommendation is that if you have a reliable reproducer, try "git bisect" > >>> between .20 and .21 to nail down a specific commit where the BUG starts to occur. > >> No need to bisect, it is me who broke. > >> The fix is already accepted, but not yet merged. > >> https://patchwork.kernel.org/patch/11387567/ > >> > >> Thanks > > -------------------------------------- > > 北京京垓科技有限公司 > > 王玉贵 wangyugui@e16-tech.com > > 电话：+86-136-71123776 > > -------------------------------------- 北京京垓科技有限公司 王玉贵 wangyugui@e16-tech.com 电话：+86-136-71123776 --------_5E55BDEB000000009266_MULTIPART_MIXED_ Content-Type: application/octet-stream; name="RDMA-core-fix-null.patch" Content-Disposition: attachment; filename="RDMA-core-fix-null.patch" Content-Transfer-Encoding: base64 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