> On May 8, 2019, at 2:37 PM, Anna Schumaker <schumaker.anna@xxxxxxxxx> 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. 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. > 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
