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=-4.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,T_DKIMWL_WL_HIGH,UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=ham 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 B2092C04A6B for ; Wed, 8 May 2019 21:56:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 54FDE20989 for ; Wed, 8 May 2019 21:56:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="JlT/BMqX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727849AbfEHV45 (ORCPT ); Wed, 8 May 2019 17:56:57 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:42932 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726506AbfEHV45 (ORCPT ); Wed, 8 May 2019 17:56:57 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x48LcaCX019551; Wed, 8 May 2019 21:56:52 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=corp-2018-07-02; bh=EeeGdOENooqQ/nbXnhYM8mtQxEaYea5jRyw/lSfp7Yc=; b=JlT/BMqXcbgRL+BZ8EQF/Ij0CyH2DsJLx2gc3FvBsxRcINiuvdvkLnGDHlHjBMUIPV/B mkEuMIObV4AQMFRu/pfhrfBQF80O6G7hB7G69yMJATybqh+6uqA9xAbIdrEl6GVgW07/ rMtURcdhmgg3eSncNcp8D2NKINRJgUu89eDHpL8ppg+xikFiVmiWdvXxXvSW+ztSP5SU v2q1gA9l7PezcVwHkU/U258u52hEJl+i41HQ80M90fzqXZjQ6tNfvOCfz5QuSVQ96rAB rM7GF9MbX59NbAYKrvOJilh0TsB2C43XWo/B2M3fGzcscJFHiAS+l8JbRceFYAPKSs9Z Sg== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by userp2120.oracle.com with ESMTP id 2s94b0y4df-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 08 May 2019 21:56:52 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x48Lt5L5177209; Wed, 8 May 2019 21:56:51 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserp3030.oracle.com with ESMTP id 2s94badvd3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 08 May 2019 21:56:51 +0000 Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x48LunMl001412; Wed, 8 May 2019 21:56:50 GMT Received: from anon-dhcp-171.1015granger.net (/68.61.232.219) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 08 May 2019 14:56:49 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.8\)) Subject: Re: Anna's linux-next (pulled 5/8) seems unstable From: Chuck Lever In-Reply-To: <2d581bd8c96e70b14d4e657b34fe1afb1584eac8.camel@gmail.com> Date: Wed, 8 May 2019 17:56:48 -0400 Cc: Linux NFS Mailing List Content-Transfer-Encoding: quoted-printable Message-Id: <83238109-CEC8-4365-AFA5-8D6172E9873D@oracle.com> References: <5daaa8ec5c835866313094603b71db330fa28ab2.camel@gmail.com> <2d581bd8c96e70b14d4e657b34fe1afb1584eac8.camel@gmail.com> To: Anna Schumaker X-Mailer: Apple Mail (2.3445.104.8) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9251 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905080131 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9251 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905080131 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org > On May 8, 2019, at 3:10 PM, Anna Schumaker = wrote: >=20 > On Wed, 2019-05-08 at 14:57 -0400, Chuck Lever wrote: >>> On May 8, 2019, at 2:37 PM, Anna Schumaker = wrote: >>>=20 >>> Hi Chuck, >>>=20 >>> What NFS version are you using for testing? And does it happen = consistently >>> on >>> the same xfstest? >>=20 >> NFSv3 with SCRATCH_DEV mounted with default (NFSv4.1). I have a = Kerberos >> keytab so even though both mounts are sec=3Dsys, the NFSv4.1 mount = uses >> krb5i for lease management. >=20 > I usually use the same version for tests and scratch, so that might be = why I > haven't seen this yet. I'll try your setup and see if I can hit = anything. >=20 >>=20 >> The gss_auth BUG pops usually during unmount, but for the last few >> times it was popping after every test finished. >>=20 >> The __alloc_pages_nodemask warning happens once per boot, right when >> the tests start. I think it's a WARN_ON_ONCE ? >>=20 >> The BUGs at the bottom of this e-mail happened when I tried to umount >> and clean up (I ^C'd at generic/052). >>=20 >> I'm trying a bisect over linux-next right now, for grins. >=20 > Let me know what you find! ac83228a7101e655ba5a7fa61ae10b058ada15db is the first bad commit commit ac83228a7101e655ba5a7fa61ae10b058ada15db Author: Trond Myklebust Date: Wed Apr 24 17:46:45 2019 -0400 SUNRPC: Use namespace of listening daemon in the client AUTH_GSS = upcall =20 When the client needs to talk to rpc.gssd, we should ensure that the uid argument is encoded to match the user namespace of the daemon. =20 Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker :040000 040000 b7690384eb71926eca4a471986228ce9262fe702 = b31440d1a4e6ad51d4f41db84a45b5c4f62e7495 M net I haven't looked closely at this commit... time for dinner. > Anna >=20 >>=20 >>=20 >>> Thanks, >>> Anna >>>=20 >>> On Wed, 2019-05-08 at 14:30 -0400, Chuck Lever wrote: >>>> Hit a few oddities, so I enabled memory debugging. >>>>=20 >>>> This happens over and over during xfstests: >>>>=20 >>>> May 8 11:19:42 manet kernel: >>>> = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>> =3D=3D=3D >>>> May 8 11:19:42 manet kernel: BUG kmalloc-128 (Tainted: >>>> G B ): >>>> Poison overwritten >>>> May 8 11:19:42 manet kernel: = -------------------------------------------- >>>> ---- >>>> ----------------------------- >>>> May 8 11:19:42 manet kernel: INFO: = 0x000000004ca7d9fd-0x000000003fa83627. >>>> First byte 0x6a instead of 0x6b >>>> May 8 11:19:42 manet kernel: INFO: Allocated in = gss_create+0x8b/0x32f >>>> [auth_rpcgss] age=3D9633 cpu=3D11 pid=3D21120 >>>>=20 >>>> This is the first field in struct gss_auth, which is a kref object. >>>>=20 >>>> I also see this: >>>>=20 >>>> May 8 14:21:16 manet kernel: WARNING: CPU: 10 PID: 45 at >>>> /home/cel/src/linux/anna/mm/page_alloc.c:4584 >>>> __alloc_pages_nodemask+0x3f/0x2c2 >>>> May 8 14:21:16 manet kernel: Modules linked in: cts = rpcsec_gss_krb5 >>>> ib_umad >>>> ib_ipoib mlx4_ib dm_mirror dm_region_hash dm_log dm_mod dax sb_edac >>>> x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm = iTCO_wdt >>>> iTCO_vendor_support irqbypass crct10dif_pclmul crc32_pclmul >>>> ghash_clmulni_intel rpcrdma aesni_intel rdma_ucm crypto_simd cryptd >>>> ib_iser >>>> glue_helper rdma_cm iw_cm pcspkr ib_cm libiscsi = scsi_transport_iscsi >>>> lpc_ich >>>> i2c_i801 mfd_core mei_me sg mei ioatdma wmi ipmi_si ipmi_devintf >>>> ipmi_msghandler acpi_power_meter acpi_pad pcc_cpufreq auth_rpcgss >>>> ip_tables >>>> xfs libcrc32c mlx4_en sr_mod cdrom qedr sd_mod ast drm_kms_helper >>>> syscopyarea >>>> sysfillrect sysimgblt fb_sys_fops ttm drm mlx4_core crc32c_intel = qede igb >>>> ahci >>>> libahci qed libata dca i2c_algo_bit i2c_core crc8 ib_uverbs ib_core = nfsv4 >>>> dns_resolver nfsv3 nfs_acl nfs lockd grace sunrpc fscache >>>> May 8 14:21:16 manet kernel: CPU: 10 PID: 45 Comm: kworker/u26:0 = Not >>>> tainted >>>> 5.1.0-rc6-00066-g3be130e #286 >>>> May 8 14:21:16 manet kernel: Hardware name: Supermicro SYS-6028R- >>>> T/X10DRi, >>>> BIOS 1.1a 10/16/2015 >>>> May 8 14:21:16 manet kernel: Workqueue: rpciod rpc_async_schedule >>>> [sunrpc] >>>> May 8 14:21:16 manet kernel: RIP: = 0010:__alloc_pages_nodemask+0x3f/0x2c2 >>>> May 8 14:21:16 manet kernel: Code: f4 55 53 89 fb 48 83 ec 30 65 = 48 8b 04 >>>> 25 >>>> 28 00 00 00 48 89 44 24 28 31 c0 48 89 e7 83 fe 0a f3 ab 76 10 80 = e7 20 74 >>>> 02 >>>> eb 02 <0f> 0b 31 c0 e9 38 02 00 00 23 1d e5 9b 0d 01 b8 22 01 32 01 = 48 63 >>>> May 8 14:21:16 manet kernel: RSP: 0018:ffffc9000332fc98 EFLAGS: = 00010246 >>>> May 8 14:21:16 manet kernel: RAX: 0000000000000000 RBX: = 0000000000040040 >>>> RCX: >>>> 0000000000000000 >>>> May 8 14:21:16 manet kernel: RDX: 0000000000000001 RSI: = 0000000000000017 >>>> RDI: >>>> ffffc9000332fcc0 >>>> May 8 14:21:16 manet kernel: RBP: 0000000000000c40 R08: = 0000000000000001 >>>> R09: >>>> 0000000000000000 >>>> May 8 14:21:16 manet kernel: R10: 8080808080808080 R11: = fefefefefefefeff >>>> R12: >>>> 0000000000000017 >>>> May 8 14:21:16 manet kernel: R13: 000000050909093c R14: = 0000000000000000 >>>> R15: >>>> 0000000000004291 >>>> May 8 14:21:16 manet kernel: FS: 0000000000000000(0000) >>>> GS:ffff88886fb00000(0000) knlGS:0000000000000000 >>>> May 8 14:21:16 manet kernel: CS: 0010 DS: 0000 ES: 0000 CR0: >>>> 0000000080050033 >>>> May 8 14:21:16 manet kernel: CR2: 00007fe2167d1e94 CR3: = 0000000002013001 >>>> CR4: >>>> 00000000001606e0 >>>> May 8 14:21:16 manet kernel: Call Trace: >>>> May 8 14:21:16 manet kernel: kmalloc_order+0x1d/0x62 >>>> May 8 14:21:16 manet kernel: kmalloc_order_trace+0x21/0x10d >>>> May 8 14:21:16 manet kernel: __kmalloc+0x42/0x14a >>>> May 8 14:21:16 manet kernel: ? xprt_do_reserve+0x6f/0x173 [sunrpc] >>>> May 8 14:21:16 manet kernel: rpc_malloc+0x61/0xba [sunrpc] >>>> May 8 14:21:16 manet kernel: call_allocate+0xdd/0x1af [sunrpc] >>>> May 8 14:21:16 manet kernel: ? rpc_clnt_add_xprt+0x153/0x153 = [sunrpc] >>>> May 8 14:21:16 manet kernel: __rpc_execute+0x135/0x42c [sunrpc] >>>> May 8 14:21:16 manet kernel: rpc_async_schedule+0x29/0x39 [sunrpc] >>>> May 8 14:21:16 manet kernel: process_one_work+0x285/0x4be >>>> May 8 14:21:16 manet kernel: worker_thread+0x1b0/0x26f >>>> May 8 14:21:16 manet kernel: ? cancel_delayed_work_sync+0xf/0xf >>>> May 8 14:21:16 manet kernel: kthread+0xf6/0xfb >>>> May 8 14:21:16 manet kernel: ? kthread_flush_work+0xc6/0xc6 >>>> May 8 14:21:16 manet kernel: ret_from_fork+0x24/0x30 >>>>=20 >>>> And just now, the xfstests got stock and this appeared in v/l/m: >>>>=20 >>>> May 8 14:22:52 manet kernel: BUG: unable to handle kernel paging = request >>>> at >>>> ffffffffc0000000 >>>> May 8 14:22:52 manet kernel: #PF error: [INSTR] >>>> May 8 14:22:52 manet kernel: PGD 2016067 P4D 2016067 PUD 2018067 = PMD 0=20 >>>> May 8 14:22:52 manet kernel: Oops: 0010 [#1] SMP >>>> May 8 14:22:52 manet kernel: CPU: 4 PID: 14848 Comm: rpc.gssd = Tainted: >>>> G B W 5.1.0-rc6-00066-g3be130e #286 >>>> May 8 14:22:52 manet kernel: Hardware name: Supermicro SYS-6028R- >>>> T/X10DRi, >>>> BIOS 1.1a 10/16/2015 >>>> May 8 14:22:52 manet kernel: RIP: 0010:0xffffffffc0000000 >>>> May 8 14:22:52 manet kernel: Code: Bad RIP value. >>>> May 8 14:22:52 manet kernel: RSP: 0018:ffffc9000cc57cd8 EFLAGS: = 00010287 >>>> May 8 14:22:52 manet kernel: RAX: ffff8884618641d8 RBX: = ffffc9000cc57da0 >>>> RCX: >>>> ffff88886b9f0050 >>>> May 8 14:22:52 manet kernel: RDX: 0000000000000020 RSI: = ffff88846847b550 >>>> RDI: >>>> ffff8884618641d8 >>>> May 8 14:22:52 manet kernel: RBP: ffffffffa04b22a0 R08: = 0000000000000dc0 >>>> R09: >>>> 0000000000180011 >>>> May 8 14:22:52 manet kernel: R10: ffffc9000cc57b30 R11: = 0000000000000002 >>>> R12: >>>> ffff8884618641d8 >>>> May 8 14:22:52 manet kernel: R13: 0000000000000c40 R14: = 0000000000000010 >>>> R15: >>>> ffffc9000cc57d90 >>>> May 8 14:22:52 manet kernel: FS: 00007febec152700(0000) >>>> GS:ffff88846fb00000(0000) knlGS:0000000000000000 >>>> May 8 14:22:52 manet kernel: CS: 0010 DS: 0000 ES: 0000 CR0: >>>> 0000000080050033 >>>> May 8 14:22:52 manet kernel: CR2: ffffffffbfffffd6 CR3: = 0000000469fea003 >>>> CR4: >>>> 00000000001606e0 >>>> May 8 14:22:52 manet kernel: Call Trace: >>>> May 8 14:22:52 manet kernel: ? krb5_derive_key+0x83/0x365 >>>> [rpcsec_gss_krb5] >>>> May 8 14:22:52 manet kernel: ? crypto_cts_setkey+0x2c/0x3b [cts] >>>> May 8 14:22:52 manet kernel: ? >>>> gss_import_sec_context_kerberos+0x823/0xa6d >>>> [rpcsec_gss_krb5] >>>> May 8 14:22:52 manet kernel: ? kmem_cache_alloc_trace+0xe4/0x10b >>>> May 8 14:22:52 manet kernel: ? gss_import_sec_context+0x6c/0xa9 >>>> [auth_rpcgss] >>>> May 8 14:22:52 manet kernel: ? gss_pipe_downcall+0x2cc/0x5b4 >>>> [auth_rpcgss] >>>> May 8 14:22:52 manet kernel: ? rpc_pipe_write+0x56/0x6d [sunrpc] >>>> May 8 14:22:52 manet kernel: ? vfs_write+0xa3/0xfa >>>> May 8 14:22:52 manet kernel: ? ksys_write+0x60/0xb3 >>>> May 8 14:22:52 manet kernel: ? do_syscall_64+0x5a/0x68 >>>> May 8 14:22:52 manet kernel: ? = entry_SYSCALL_64_after_hwframe+0x49/0xbe >>>> May 8 14:22:52 manet kernel: Modules linked in: cts = rpcsec_gss_krb5 >>>> ib_umad >>>> ib_ipoib mlx4_ib dm_mirror dm_region_hash dm_log dm_mod dax sb_edac >>>> x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm = iTCO_wdt >>>> iTCO_vendor_support irqbypass crct10dif_pclmul crc32_pclmul >>>> ghash_clmulni_intel rpcrdma aesni_intel rdma_ucm crypto_simd cryptd >>>> ib_iser >>>> glue_helper rdma_cm iw_cm pcspkr ib_cm libiscsi = scsi_transport_iscsi >>>> lpc_ich >>>> i2c_i801 mfd_core mei_me sg mei ioatdma wmi ipmi_si ipmi_devintf >>>> ipmi_msghandler acpi_power_meter acpi_pad pcc_cpufreq auth_rpcgss >>>> ip_tables >>>> xfs libcrc32c mlx4_en sr_mod cdrom qedr sd_mod ast drm_kms_helper >>>> syscopyarea >>>> sysfillrect sysimgblt fb_sys_fops ttm drm mlx4_core crc32c_intel = qede igb >>>> ahci >>>> libahci qed libata dca i2c_algo_bit i2c_core crc8 ib_uverbs ib_core = nfsv4 >>>> dns_resolver nfsv3 nfs_acl nfs lockd grace sunrpc fscache >>>> May 8 14:22:52 manet kernel: CR2: ffffffffc0000000 >>>> May 8 14:22:52 manet kernel: ---[ end trace 3c526e4155ae084b ]--- >>>> May 8 14:22:52 manet kernel: RIP: 0010:0xffffffffc0000000 >>>> May 8 14:22:52 manet kernel: Code: Bad RIP value. >>>> May 8 14:22:52 manet kernel: RSP: 0018:ffffc9000cc57cd8 EFLAGS: = 00010287 >>>> May 8 14:22:52 manet kernel: RAX: ffff8884618641d8 RBX: = ffffc9000cc57da0 >>>> RCX: >>>> ffff88886b9f0050 >>>> May 8 14:22:52 manet kernel: RDX: 0000000000000020 RSI: = ffff88846847b550 >>>> RDI: >>>> ffff8884618641d8 >>>> May 8 14:22:52 manet kernel: RBP: ffffffffa04b22a0 R08: = 0000000000000dc0 >>>> R09: >>>> 0000000000180011 >>>> May 8 14:22:52 manet kernel: R10: ffffc9000cc57b30 R11: = 0000000000000002 >>>> R12: >>>> ffff8884618641d8 >>>> May 8 14:22:52 manet kernel: R13: 0000000000000c40 R14: = 0000000000000010 >>>> R15: >>>> ffffc9000cc57d90 >>>> May 8 14:22:52 manet kernel: FS: 00007febec152700(0000) >>>> GS:ffff88846fb00000(0000) knlGS:0000000000000000 >>>> May 8 14:22:52 manet kernel: CS: 0010 DS: 0000 ES: 0000 CR0: >>>> 0000000080050033 >>>> May 8 14:22:52 manet kernel: CR2: ffffffffbfffffd6 CR3: = 0000000469fea003 >>>> CR4: >>>> 00000000001606e0 >>>> May 8 14:22:52 manet kernel: BUG: sleeping function called from = invalid >>>> context at /home/cel/src/linux/anna/include/linux/percpu-rwsem.h:34 >>>> May 8 14:22:52 manet kernel: in_atomic(): 0, irqs_disabled(): 1, = pid: >>>> 14848, >>>> name: rpc.gssd >>>> May 8 14:22:52 manet kernel: INFO: lockdep is turned off. >>>> May 8 14:22:52 manet kernel: irq event stamp: 0 >>>> May 8 14:22:52 manet kernel: hardirqs last enabled at (0): >>>> [<0000000000000000>] (null) >>>> May 8 14:22:52 manet kernel: hardirqs last disabled at (0): >>>> [] copy_process+0x774/0x1e24 >>>> May 8 14:22:52 manet kernel: softirqs last enabled at (0): >>>> [] copy_process+0x774/0x1e24 >>>> May 8 14:22:52 manet kernel: softirqs last disabled at (0): >>>> [<0000000000000000>] (null) >>>> May 8 14:22:52 manet kernel: CPU: 4 PID: 14848 Comm: rpc.gssd = Tainted: >>>> G B >>>> D W 5.1.0-rc6-00066-g3be130e #286 >>>> May 8 14:22:52 manet kernel: Hardware name: Supermicro SYS-6028R- >>>> T/X10DRi, >>>> BIOS 1.1a 10/16/2015 >>>> May 8 14:22:52 manet kernel: Call Trace: >>>> May 8 14:22:52 manet kernel: dump_stack+0x78/0xa9 >>>> May 8 14:22:52 manet kernel: ___might_sleep+0x1b8/0x1cd >>>> May 8 14:22:52 manet kernel: exit_signals+0x35/0x195 >>>> May 8 14:22:52 manet kernel: do_exit+0x122/0xa61 >>>> May 8 14:22:52 manet kernel: ? ksys_write+0x60/0xb3 >>>> May 8 14:22:52 manet kernel: rewind_stack_do_exit+0x17/0x20 >>>>=20 >>>>=20 >>>> -- >>>> Chuck Lever >>>>=20 >>>>=20 >>>>=20 >>=20 >> -- >> Chuck Lever >>=20 >>=20 >>=20 >=20 -- Chuck Lever