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Message-ID: <2d581bd8c96e70b14d4e657b34fe1afb1584eac8.camel@gmail.com>
Subject: Re: Anna's linux-next (pulled 5/8) seems unstable
From:   Anna Schumaker <schumaker.anna@gmail.com>
To:     Chuck Lever <chuck.lever@oracle.com>
Cc:     Linux NFS Mailing List <linux-nfs@vger.kernel.org>
Date:   Wed, 08 May 2019 15:10:22 -0400
In-Reply-To: <EFEA06E8-2534-40DF-91BD-ED4C58BF5E1D@oracle.com>
References: <ACF23F78-1162-420D-92F9-3856EA44A323@oracle.com>
         <5daaa8ec5c835866313094603b71db330fa28ab2.camel@gmail.com>
         <EFEA06E8-2534-40DF-91BD-ED4C58BF5E1D@oracle.com>
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On Wed, 2019-05-08 at 14:57 -0400, Chuck Lever wrote:
> > On May 8, 2019, at 2:37 PM, Anna Schumaker <schumaker.anna@gmail.com> wrote:
> > 
> > Hi Chuck,
> > 
> > What NFS version are you using for testing? And does it happen consistently
> > on
> > the same xfstest?
> 
> NFSv3 with SCRATCH_DEV mounted with default (NFSv4.1). I have a Kerberos
> keytab so even though both mounts are sec=sys, the NFSv4.1 mount uses
> krb5i for lease management.

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.

> 
> The gss_auth BUG pops usually during unmount, but for the last few
> times it was popping after every test finished.
> 
> The __alloc_pages_nodemask warning happens once per boot, right when
> the tests start. I think it's a WARN_ON_ONCE ?
> 
> The BUGs at the bottom of this e-mail happened when I tried to umount
> and clean up (I ^C'd at generic/052).
> 
> I'm trying a bisect over linux-next right now, for grins.

Let me know what you find!

Anna

> 
> 
> > Thanks,
> > Anna
> > 
> > On Wed, 2019-05-08 at 14:30 -0400, Chuck Lever wrote:
> > > Hit a few oddities, so I enabled memory debugging.
> > > 
> > > This happens over and over during xfstests:
> > > 
> > > May  8 11:19:42 manet kernel:
> > > ==========================================================================
> > > ===
> > > 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=9633 cpu=11 pid=21120
> > > 
> > > This is the first field in struct gss_auth, which is a kref object.
> > > 
> > > I also see this:
> > > 
> > > 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
> > > 
> > > And just now, the xfstests got stock and this appeared in v/l/m:
> > > 
> > > 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 
> > > 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):
> > > [<ffffffff8106e944>] copy_process+0x774/0x1e24
> > > May  8 14:22:52 manet kernel: softirqs last  enabled at (0):
> > > [<ffffffff8106e944>] 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
> > > 
> > > 
> > > --
> > > Chuck Lever
> > > 
> > > 
> > > 
> 
> --
> Chuck Lever
> 
> 
>