------- Comment From pavra...@in.ibm.com 2018-04-12 04:19 EDT-------
(In reply to comment #18)
> If this issue still also exists on v4.16-rc4, we would also want to test
> some of the newer release candidates, such as -rc5, -rc6, etc.

Issue is observed even with -rc4.

[10700.354365] LTP: starting ftest07
[10700.738992] LTP: starting ftest08
[10700.829909] LTP: starting lftest01 (lftest 100)
[10700.911841] LTP: starting writetest01 (writetest)
[10701.014047] LTP: starting fs_di (fs_di -d $TMPDIR)
[10707.090259] LTP: starting proc01 (proc01 -m 128)
[10707.947509] ICMPv6: process `proc01' is using deprecated sysctl (syscall) 
net.ipv6.neigh.default.base_reachable_time - use 
net.ipv6.neigh.default.base_reachable_time_ms instead
[10709.666103] LTP: starting read_all_dev (read_all -d /dev -e 
'/dev/watchdog?(0)' -q -r 10)
[10709.749772] NET: Registered protocol family 40
[10709.784921] Bluetooth: Core ver 2.22
[10709.785013] NET: Registered protocol family 31
[10709.785049] Bluetooth: HCI device and connection manager initialized
[10709.785092] Bluetooth: HCI socket layer initialized
[10709.785128] Bluetooth: L2CAP socket layer initialized
[10709.785166] Bluetooth: SCO socket layer initialized
[11009.804641] LTP: starting read_all_proc (read_all -d /proc -q -r 10)
[11010.009001] ICMPv6: process `read_all' is using deprecated sysctl (syscall) 
net.ipv6.neigh.enP2p1s0f0.base_reachable_time - use 
net.ipv6.neigh.enP2p1s0f0.base_reachable_time_ms instead
[11011.814394] LTP: starting read_all_sys (read_all -d /sys -q -r 10)
[11012.513676] Unable to handle kernel paging request for data at address 
[11012.513775] Faulting instruction address: 0xd00000001533dcb8
[11012.513824] Oops: Kernel access of bad area, sig: 11 [#1]
[11012.513841] Unable to handle kernel paging request for data at address 
[11012.513864] LE
[11012.513926] Faulting instruction address: 0xd00000001533dcb8
[11012.513928] SMP NR_CPUS=2048 NUMA PowerNV
[11012.514025] Modules linked in: snd_seq_dummy hci_vhci bluetooth cuse userio 
ecdh_generic uhid vhost_vsock vmw_vsock_virtio_transport_common vhost_net vhost 
tap vsock snd_seq snd_seq_device snd_timer snd soundcore binfmt_misc sctp 
quota_v2 quota_tree nls_iso8859_1 ntfs xfs xt_CHECKSUM iptable_mangle 
ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat 
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT 
nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter 
ip6_tables iptable_filter idt_89hpesx vmx_crypto ipmi_powernv ofpart 
cmdlinepart ipmi_devintf powernv_flash ipmi_msghandler mtd at24 ibmpowernv 
opal_prd powernv_rng input_leds joydev mac_hid uio_pdrv_genirq uio kvm_hv kvm 
sch_fq_codel nfsd ib_iser rdma_cm iw_cm auth_rpcgss ib_cm nfs_acl
[11012.514561]  lockd iscsi_tcp libiscsi_tcp grace libiscsi 
scsi_transport_iscsi sunrpc ip_tables x_tables autofs4 btrfs zstd_compress 
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor 
raid6_pq libcrc32c raid1 raid0 multipath linear mlx5_ib hid_generic ses 
enclosure scsi_transport_sas usbhid hid ib_core ast i2c_algo_bit ttm 
drm_kms_helper qla2xxx syscopyarea sysfillrect sysimgblt fb_sys_fops mlx5_core 
drm nvme_fc ahci nvme_fabrics mlxfw crct10dif_vpmsum crc32c_vpmsum i40e devlink 
scsi_transport_fc megaraid_sas libahci drm_panel_orientation_quirks
[11012.514913] CPU: 27 PID: 3827 Comm: read_all Tainted: G        W        
4.16.0-041600rc4-generic #201803041930
[11012.514982] NIP:  d00000001533dcb8 LR: c000000000414718 CTR: d00000001533dc08
[11012.515035] REGS: c000003d79ad78d0 TRAP: 0300   Tainted: G        W         
[11012.515095] MSR:  9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 22002844  
XER: 20000000
[11012.515153] CFAR: c00000000000878c DAR: 00000000000000c8 DSISR: 40000000 
[11012.515153] GPR00: c000000000414718 c000003d79ad7b50 d0000000153a2000 
[11012.515153] GPR04: 0000000000000001 0000000000006458 0000000000000000 
[11012.515153] GPR08: c000007fe1e47be8 0000000000000000 c000007fe1e47b00 
[11012.515153] GPR12: d00000001533dc08 c000000007a92900 0000000000000000 
[11012.515153] GPR16: 0000000000000000 000000000000000b 0000000000000006 
[11012.515153] GPR20: 00007ffffb9eeaa8 c00000794aee8808 0000000000000000 
[11012.515153] GPR24: 0000000000000000 0000000000000000 0000000000000000 
[11012.515153] GPR28: 000000000000000f 0000000000000000 0000000000000000 
[11012.515616] NIP [d00000001533dcb8] qla_dfs_tgt_counters_show+0xb0/0x2e0 
[11012.515670] LR [c000000000414718] seq_read+0x138/0x610
[11012.515703] Call Trace:
[11012.515722] [c000003d79ad7b50] [c000003d79ad7bd0] 0xc000003d79ad7bd0 
[11012.515770] [c000003d79ad7c10] [c000000000414718] seq_read+0x138/0x610
[11012.515852] [c000003d79ad7cb0] [c000000000581ab0] full_proxy_read+0x90/0xe0
[11012.515893] [c000003d79ad7d00] [c0000000003da8fc] __vfs_read+0x3c/0x1b0
[11012.515934] [c000003d79ad7d90] [c0000000003dab2c] vfs_read+0xbc/0x1b0
[11012.515980] [c000003d79ad7de0] [c0000000003db298] SyS_read+0x68/0x110
[11012.516022] [c000003d79ad7e30] [c00000000000b184] system_call+0x58/0x6c
[11012.516061] Instruction dump:
[11012.516090] eba90108 419e0078 e94a00f8 [11100.180027654,5] OPAL: Switch to 
big-endian OS
3908ffff 79081b68 7d0a4214 394afff8 60000000
[11012.516144][11105.022100634,5] OPAL: Switch to little-endian OS

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  Ubuntu 18.04  Machine crashed while running ltp.

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