On Wed, 2018-05-30 at 15:47 -0400, Olga Kornievskaia wrote:
> I get a kernel oops
>
> [ 101.881058] BUG: unable to handle kernel NULL pointer dereference
> at 0000000000000088
> [ 101.884302] PGD 800000002e0dc067 P4D 800000002e0dc067 PUD 2e0dd067
> PMD 0
> [ 101.886773] Oops: 0000 [#1] SMP PTI
> [ 101.888026] Modules linked in: nfs_layout_nfsv41_files
> rpcsec_gss_krb5 nfsv4 dns_resolver nfs ib_iser libiscsi
> scsi_transport_iscsi ib_srp scsi_transport_srp ib_ipoib rdma_ucm
> ib_ucm ib_uverbs ib_umad rpcrdma rdma_cm iw_cm ib_cm ib_core rfcomm
> fuse ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT
> nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc
> ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6
> ip6table_mangle ip6table_security ip6table_raw iptable_nat
> nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack
> iptable_mangle iptable_security iptable_raw ebtable_filter ebtables
> ip6table_filter ip6_tables iptable_filter bnep snd_seq_midi
> snd_seq_midi_event coretemp crct10dif_pclmul crc32_pclmul
> ghash_clmulni_intel pcbc btusb btrtl uvcvideo btbcm snd_ens1371
> btintel
> [ 101.913196] snd_ac97_codec bluetooth ac97_bus aesni_intel snd_seq
> videobuf2_vmalloc crypto_simd videobuf2_memops videobuf2_v4l2 cryptd
> glue_helper videodev vmw_balloon snd_pcm pcspkr ext4 snd_timer
> mbcache
> jbd2 snd_rawmidi videobuf2_common snd_seq_device snd rfkill
> ecdh_generic vmw_vmci shpchp soundcore i2c_piix4 nfsd nfs_acl lockd
> auth_rpcgss grace sunrpc ip_tables xfs libcrc32c sr_mod cdrom
> ata_generic vmwgfx pata_acpi drm_kms_helper syscopyarea sysfillrect
> sysimgblt fb_sys_fops ttm sd_mod drm crc32c_intel ahci ata_piix
> libahci serio_raw libata mptspi scsi_transport_spi e1000 i2c_core
> mptscsih mptbase dm_mirror dm_region_hash dm_log dm_mod
> [ 101.934175] CPU: 0 PID: 2485 Comm: bash Tainted: G W
> 4.17.0-rc7+ #111
> [ 101.938064] Hardware name: VMware, Inc. VMware Virtual
> Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
> [ 101.943395] RIP:
> 0010:fl_pnfs_update_layout.constprop.22+0x51/0x150
> [nfs_layout_nfsv41_files]
> [ 101.947586] RSP: 0018:ffffb00443027ac0 EFLAGS: 00010246
> [ 101.949513] RAX: 0000000000000000 RBX: ffff9739bada46c0 RCX:
> 00000001802a0028
> [ 101.952094] RDX: 00000001802a0029 RSI: 0000000000000000 RDI:
> 0000000040000000
> [ 101.954862] RBP: ffff97396cd70608 R08: ffff9739b3b2d200 R09:
> 00000001802a0028
> [ 101.957999] R10: 00000000b3b2d101 R11: ffff9739b3b2d200 R12:
> 0000000001400040
> [ 101.960552] R13: 0000000000000000 R14: ffffb00443027d90 R15:
> ffff9739b9126000
> [ 101.963083] FS: 00007f31d31b0740(0000) GS:ffff9739bb600000(0000)
> knlGS:0000000000000000
> [ 101.966021] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 101.968468] CR2: 0000000000000088 CR3: 000000002e0f0006 CR4:
> 00000000001606f0
> [ 101.971240] Call Trace:
> [ 101.972178] filelayout_pg_init_write+0x223/0x270
> [nfs_layout_nfsv41_files]
> [ 101.974741] __nfs_pageio_add_request+0x117/0x3c0 [nfs]
> [ 101.976637] ? radix_tree_tag_clear+0x9c/0xd0
> [ 101.978230] nfs_pageio_add_request+0x17f/0x310 [nfs]
> [ 101.980123] nfs_do_writepage+0x18e/0x390 [nfs]
> [ 101.981774] nfs_writepages_callback+0xf/0x20 [nfs]
> [ 101.983526] write_cache_pages+0x21f/0x460
> [ 101.985077] ? nfs_do_writepage+0x390/0x390 [nfs]
> [ 101.986853] ? wb_wakeup_delayed+0x52/0x60
> [ 101.988315] ? __set_page_dirty_nobuffers+0x119/0x180
> [ 101.990125] ? _cond_resched+0x15/0x30
> [ 101.991481] ? kmem_cache_alloc_trace+0xae/0x1c0
> [ 101.993151] nfs_writepages+0xb2/0x120 [nfs]
> [ 101.994705] do_writepages+0x17/0x70
> [ 101.996012] __filemap_fdatawrite_range+0xc5/0x100
> [ 101.997727] filemap_write_and_wait_range+0x30/0x80
> [ 101.999453] nfs_file_fsync+0x39/0x1f0 [nfs]
> [ 102.000991] filp_close+0x2a/0x70
> [ 102.002176] do_dup2+0x79/0xd0
> [ 102.003293] __x64_sys_dup2+0x1a/0x60
> [ 102.004639] do_syscall_64+0x55/0x180
> [ 102.005951] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 102.007771] RIP: 0033:0x7f31d289ff17
> [ 102.009093] RSP: 002b:00007fff269668b8 EFLAGS: 00000246 ORIG_RAX:
> 0000000000000021
> [ 102.011772] RAX: ffffffffffffffda RBX: 0000000002644790 RCX:
> 00007f31d289ff17
> [ 102.014323] RDX: 0000000000000001 RSI: 0000000000000001 RDI:
> 000000000000000a
> [ 102.016852] RBP: 00007fff26966940 R08: 000000000000000a R09:
> 000000000263a250
> [ 102.019380] R10: 0000000000000003 R11: 0000000000000246 R12:
> 0000000000000007
> [ 102.021928] R13: 0000000000000009 R14: 0000000000000001 R15:
> 0000000000000000
> [ 102.024454] Code: b6 fc f8 ff 48 85 c0 48 89 c3 74 13 48 3d 00 f0
> ff ff 77 0b 48 83 7b 78 00 48 8b 45 e8 74 0c 48 83 c4 08 48 89 d8 5b
> 5d 41 5c c3 <48> 8b 90 88 00 00 00 48 8b 80 90 00 00 00 48 8d 73 68
> 44
> 89 e1
> [ 102.031048] RIP: fl_pnfs_update_layout.constprop.22+0x51/0x150
> [nfs_layout_nfsv41_files] RSP: ffffb00443027ac0
> [ 102.034692] CR2: 0000000000000088
> [ 102.036225] ---[ end trace ae6b78ef3992a438 ]---
> [ 102.037969] Kernel panic - not syncing: Fatal exception
> [ 102.039901] Kernel Offset: 0x36600000 from 0xffffffff81000000
> (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
> [ 102.043717] ---[ end Kernel panic - not syncing: Fatal exception
> ]---
Urgh.. That was a porting error: Mea culpa...
Should be fixed in the testing branch now.
Cheers
Trond
--
Trond Myklebust
Linux NFS client maintainer, Hammerspace
trond.myklebust@xxxxxxxxxxxxxxx
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