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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 B3C51C4332B for ; Tue, 24 Mar 2020 09:16:08 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 786FF2080C for ; Tue, 24 Mar 2020 09:16:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 786FF2080C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 5E2DC10FC38AB; Tue, 24 Mar 2020 02:16:58 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=aneesh.kumar@linux.ibm.com; receiver= Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id C419D10FC38A9 for ; Tue, 24 Mar 2020 02:16:55 -0700 (PDT) Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02O93wqX064445; Tue, 24 Mar 2020 05:16:03 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ywejw4wv6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 24 Mar 2020 05:16:02 -0400 Received: from m0187473.ppops.net (m0187473.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 02O93wD4064429; Tue, 24 Mar 2020 05:16:01 -0400 Received: from ppma02wdc.us.ibm.com (aa.5b.37a9.ip4.static.sl-reverse.com [169.55.91.170]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ywejw4wuf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 24 Mar 2020 05:16:01 -0400 Received: from pps.filterd (ppma02wdc.us.ibm.com [127.0.0.1]) by ppma02wdc.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 02O9EdDe017613; Tue, 24 Mar 2020 09:16:00 GMT Received: from b03cxnp08028.gho.boulder.ibm.com (b03cxnp08028.gho.boulder.ibm.com [9.17.130.20]) by ppma02wdc.us.ibm.com with ESMTP id 2ywawjq77b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 24 Mar 2020 09:16:00 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02O9FxoK37290390 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 24 Mar 2020 09:15:59 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 64B30BE059; Tue, 24 Mar 2020 09:15:59 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E4BDCBE051; Tue, 24 Mar 2020 09:15:56 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.85.116.254]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 24 Mar 2020 09:15:55 +0000 (GMT) X-Mailer: emacs 27.0.90 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: Sachin Sant , LKML , linuxppc-dev@lists.ozlabs.org Subject: Re: [5.6.0-rc7] Kernel crash while running ndctl tests In-Reply-To: References: Date: Tue, 24 Mar 2020 14:45:53 +0530 Message-ID: <87a746cdva.fsf@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.645 definitions=2020-03-24_02:2020-03-23,2020-03-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 suspectscore=2 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003240048 Message-ID-Hash: X637WJVBN4SDBFRDUTSIRY5KT6JG566X X-Message-ID-Hash: X637WJVBN4SDBFRDUTSIRY5KT6JG566X X-MailFrom: aneesh.kumar@linux.ibm.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Baoquan He , linux-nvdimm@lists.01.org X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." 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24 Mar 2020 09:16:00 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02O9FxoK37290390 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 24 Mar 2020 09:15:59 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 64B30BE059; Tue, 24 Mar 2020 09:15:59 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E4BDCBE051; Tue, 24 Mar 2020 09:15:56 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.85.116.254]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 24 Mar 2020 09:15:55 +0000 (GMT) X-Mailer: emacs 27.0.90 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: Sachin Sant , LKML , linuxppc-dev@lists.ozlabs.org Subject: Re: [5.6.0-rc7] Kernel crash while running ndctl tests In-Reply-To: References: Date: Tue, 24 Mar 2020 14:45:53 +0530 Message-ID: <87a746cdva.fsf@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.645 definitions=2020-03-24_02:2020-03-23, 2020-03-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 suspectscore=2 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003240048 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dan Williams , Baoquan He , linux-nvdimm@lists.01.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Sachin Sant writes: > While running ndctl[1] tests against 5.6.0-rc7 following crash is encount= ered. > > Bisect leads me to commit d41e2f3bd546=20 > mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case > > Reverting this commit helps and the tests complete without any crash. > > pmem0: detected capacity change from 0 to 10720641024 > BUG: Kernel NULL pointer dereference on read at 0x00000000 > Faulting instruction address: 0xc000000000c3447c > Oops: Kernel access of bad area, sig: 11 [#1] > LE PAGE_SIZE=3D64K MMU=3DHash SMP NR_CPUS=3D2048 NUMA pSeries > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libc= rc32c ip6_tables nft_compat ip_set rfkill nf_tables nfnetlink sunrpc sg pse= ries_rng papr_scm uio_pdrv_genirq uio sch_fq_codel ip_tables sd_mod t10_pi = ibmvscsi scsi_transport_srp ibmveth > CPU: 11 PID: 7519 Comm: lt-ndctl Not tainted 5.6.0-rc7-autotest #1 > NIP: c000000000c3447c LR: c000000000088354 CTR: c00000000018e990 > REGS: c0000006223fb630 TRAP: 0300 Not tainted (5.6.0-rc7-autotest) > MSR: 800000000280b033 CR: 24048888 X= ER: 00000000 > CFAR: c00000000000dec4 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0=20 > GPR00: c0000000003c5820 c0000006223fb8c0 c000000001684900 000000000400000= 0=20 > GPR04: c00c000101000000 0000000007ffffff c00000067ff20900 c00c00000000000= 0=20 > GPR08: 0000000000000000 c00c000100000000 0000000000000000 c000000003f0000= 0=20 > GPR12: 0000000000008000 c00000001ec70200 00007fffc102f9e8 000000001002e08= 8=20 > GPR16: 0000000000000000 0000000010050d88 000000001002f778 000000001002f77= 0=20 > GPR20: 0000000000000000 0000000000000100 0000000000000001 000000000000100= 0=20 > GPR24: 0000000000000008 0000000000000000 0000000004000000 c00c00010000400= 0=20 > GPR28: c000000003101aa0 c00c000100000000 0000000001000000 000000000400010= 0=20 > NIP [c000000000c3447c] vmemmap_populated+0x98/0xc0 > LR [c000000000088354] vmemmap_free+0x144/0x320 > Call Trace: > [c0000006223fb8c0] [c0000006223fb960] 0xc0000006223fb960 (unreliable) > [c0000006223fb980] [c0000000003c5820] section_deactivate+0x220/0x240 > [c0000006223fba30] [c0000000003dc1d8] __remove_pages+0x118/0x170 > [c0000006223fba80] [c000000000086e5c] arch_remove_memory+0x3c/0x150 > [c0000006223fbb00] [c00000000041a3bc] memunmap_pages+0x1cc/0x2f0 > [c0000006223fbb80] [c0000000007d6d00] devm_action_release+0x30/0x50 > [c0000006223fbba0] [c0000000007d7de8] release_nodes+0x2f8/0x3e0 > [c0000006223fbc50] [c0000000007d0b38] device_release_driver_internal+0x16= 8/0x270 > [c0000006223fbc90] [c0000000007ccf50] unbind_store+0x130/0x170 > [c0000006223fbcd0] [c0000000007cc0b4] drv_attr_store+0x44/0x60 > [c0000006223fbcf0] [c00000000051fdb8] sysfs_kf_write+0x68/0x80 > [c0000006223fbd10] [c00000000051f200] kernfs_fop_write+0x100/0x290 > [c0000006223fbd60] [c00000000042037c] __vfs_write+0x3c/0x70 > [c0000006223fbd80] [c00000000042404c] vfs_write+0xcc/0x240 > [c0000006223fbdd0] [c00000000042442c] ksys_write+0x7c/0x140 > [c0000006223fbe20] [c00000000000b278] system_call+0x5c/0x68 > Instruction dump: > 2ea80000 4196003c 794a2428 7d685215 41820030 7d48502a 71480002 41820024=20 > 714a0008 4082002c e90b0008 786adf62 7c635436 70630001 4c820020= =20 > ---[ end trace 579b48162da1b890 ]=E2=80=94 Can you try this change? diff --git a/mm/sparse.c b/mm/sparse.c index aadb7298dcef..3012d1f3771a 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -781,6 +781,8 @@ static void section_deactivate(unsigned long pfn, unsig= ned long nr_pages, ms->usage =3D NULL; } memmap =3D sparse_decode_mem_map(ms->section_mem_map, section_nr); + /* Mark the section invalid */ + ms->section_mem_map &=3D ~SECTION_HAS_MEM_MAP; } =20 if (section_is_early && memmap) a pfn_valid check involves pnf_section_valid() check if section is having MEM_MAP. In this case we did end up setting the ms->uage =3D NULL. So when we do that tupdate the section to not have MEM_MAP. -aneesh 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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 AF4F9C4332B for ; Tue, 24 Mar 2020 09:16:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 81F8720724 for ; Tue, 24 Mar 2020 09:16:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727112AbgCXJQN convert rfc822-to-8bit (ORCPT ); Tue, 24 Mar 2020 05:16:13 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:25972 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726129AbgCXJQN (ORCPT ); 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Tue, 24 Mar 2020 09:16:00 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02O9FxoK37290390 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 24 Mar 2020 09:15:59 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 64B30BE059; Tue, 24 Mar 2020 09:15:59 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E4BDCBE051; Tue, 24 Mar 2020 09:15:56 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.85.116.254]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 24 Mar 2020 09:15:55 +0000 (GMT) X-Mailer: emacs 27.0.90 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: Sachin Sant , LKML , linuxppc-dev@lists.ozlabs.org Cc: Baoquan He , linux-nvdimm@lists.01.org, Dan Williams Subject: Re: [5.6.0-rc7] Kernel crash while running ndctl tests In-Reply-To: References: Date: Tue, 24 Mar 2020 14:45:53 +0530 Message-ID: <87a746cdva.fsf@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.645 definitions=2020-03-24_02:2020-03-23,2020-03-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 suspectscore=2 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003240048 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sachin Sant writes: > While running ndctl[1] tests against 5.6.0-rc7 following crash is encountered. > > Bisect leads me to commit d41e2f3bd546 > mm/hotplug: fix hot remove failure in SPARSEMEM|!VMEMMAP case > > Reverting this commit helps and the tests complete without any crash. > > pmem0: detected capacity change from 0 to 10720641024 > BUG: Kernel NULL pointer dereference on read at 0x00000000 > Faulting instruction address: 0xc000000000c3447c > Oops: Kernel access of bad area, sig: 11 [#1] > LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip6_tables nft_compat ip_set rfkill nf_tables nfnetlink sunrpc sg pseries_rng papr_scm uio_pdrv_genirq uio sch_fq_codel ip_tables sd_mod t10_pi ibmvscsi scsi_transport_srp ibmveth > CPU: 11 PID: 7519 Comm: lt-ndctl Not tainted 5.6.0-rc7-autotest #1 > NIP: c000000000c3447c LR: c000000000088354 CTR: c00000000018e990 > REGS: c0000006223fb630 TRAP: 0300 Not tainted (5.6.0-rc7-autotest) > MSR: 800000000280b033 CR: 24048888 XER: 00000000 > CFAR: c00000000000dec4 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0 > GPR00: c0000000003c5820 c0000006223fb8c0 c000000001684900 0000000004000000 > GPR04: c00c000101000000 0000000007ffffff c00000067ff20900 c00c000000000000 > GPR08: 0000000000000000 c00c000100000000 0000000000000000 c000000003f00000 > GPR12: 0000000000008000 c00000001ec70200 00007fffc102f9e8 000000001002e088 > GPR16: 0000000000000000 0000000010050d88 000000001002f778 000000001002f770 > GPR20: 0000000000000000 0000000000000100 0000000000000001 0000000000001000 > GPR24: 0000000000000008 0000000000000000 0000000004000000 c00c000100004000 > GPR28: c000000003101aa0 c00c000100000000 0000000001000000 0000000004000100 > NIP [c000000000c3447c] vmemmap_populated+0x98/0xc0 > LR [c000000000088354] vmemmap_free+0x144/0x320 > Call Trace: > [c0000006223fb8c0] [c0000006223fb960] 0xc0000006223fb960 (unreliable) > [c0000006223fb980] [c0000000003c5820] section_deactivate+0x220/0x240 > [c0000006223fba30] [c0000000003dc1d8] __remove_pages+0x118/0x170 > [c0000006223fba80] [c000000000086e5c] arch_remove_memory+0x3c/0x150 > [c0000006223fbb00] [c00000000041a3bc] memunmap_pages+0x1cc/0x2f0 > [c0000006223fbb80] [c0000000007d6d00] devm_action_release+0x30/0x50 > [c0000006223fbba0] [c0000000007d7de8] release_nodes+0x2f8/0x3e0 > [c0000006223fbc50] [c0000000007d0b38] device_release_driver_internal+0x168/0x270 > [c0000006223fbc90] [c0000000007ccf50] unbind_store+0x130/0x170 > [c0000006223fbcd0] [c0000000007cc0b4] drv_attr_store+0x44/0x60 > [c0000006223fbcf0] [c00000000051fdb8] sysfs_kf_write+0x68/0x80 > [c0000006223fbd10] [c00000000051f200] kernfs_fop_write+0x100/0x290 > [c0000006223fbd60] [c00000000042037c] __vfs_write+0x3c/0x70 > [c0000006223fbd80] [c00000000042404c] vfs_write+0xcc/0x240 > [c0000006223fbdd0] [c00000000042442c] ksys_write+0x7c/0x140 > [c0000006223fbe20] [c00000000000b278] system_call+0x5c/0x68 > Instruction dump: > 2ea80000 4196003c 794a2428 7d685215 41820030 7d48502a 71480002 41820024 > 714a0008 4082002c e90b0008 786adf62 7c635436 70630001 4c820020 > ---[ end trace 579b48162da1b890 ]— Can you try this change? diff --git a/mm/sparse.c b/mm/sparse.c index aadb7298dcef..3012d1f3771a 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -781,6 +781,8 @@ static void section_deactivate(unsigned long pfn, unsigned long nr_pages, ms->usage = NULL; } memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr); + /* Mark the section invalid */ + ms->section_mem_map &= ~SECTION_HAS_MEM_MAP; } if (section_is_early && memmap) a pfn_valid check involves pnf_section_valid() check if section is having MEM_MAP. In this case we did end up setting the ms->uage = NULL. So when we do that tupdate the section to not have MEM_MAP. -aneesh