------- Comment From finne...@us.ibm.com 2020-01-13 16:40 EDT-------
This defect can be closed.

The systems are now running 4.15.0-65-generic and there have been no new
reportings of  'Oops: 0004 ilc:3 [#1] SMP' Workqueue: iscsi_q_1
iscsi_xmitworker [libiscsi].

Last Oops panic were reported against kernel 4.15.0-47-generic

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  Kernel panic,Oops: 0004 ilc:3 [#1] SMP,  iscsi_q_20 iscsi_xmitworker

Status in Ubuntu on IBM z Systems:
Status in linux package in Ubuntu:

Bug description:
  == Comment: #0 - Michael Finnegan <finne...@us.ibm.com> - 2018-11-19 14:14:40 
  ---Problem Description---
  Kernel panic,Oops: 0004 ilc:3 [#1] SMP,  iscsi_q_20 iscsi_xmitworker 
  ---uname output---
  Linux ilabg3 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:13:24 UTC 2018 
s390x s390x s390x GNU/Linux
  Machine Type = IBM 3906 M05 7G4 (z/VM 7.1.0) 
  A debugger is not configured
  Contact Information = Michael Finnegan/finne...@us.ibm.com 
  Stack trace output:
  [1363037.322472] Unable to handle kernel pointer dereference in virtual 
kernel address space
  [1363037.322481] Failing address: 0000000000000000 TEID: 0000000000000483
  [1363037.322483] Fault in home space mode while using kernel ASCE.
  [1363037.322486] AS:0000000000ea0007 R3:00000000f37d0007 S:00000000f37ff000 
  [1363037.322524] Oops: 0004 ilc:3 [#1] SMP
  [1363037.322529] Modules linked in: iptable_filter binfmt_misc 
rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache qeth_l3 qeth_l2 
s390_trng ghash_s390 prng aes_s390 des_s390 des_generic sha512_s390 sha256_s390 
sha1_s390 sha_common qeth vmur ccwgroup vfio_ccw vfio_mdev mdev 
vfio_iommu_type1 vfio sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core sunrpc 
iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables 
dm_round_robin dm_service_time crc32_vx_s390 dasd_eckd_mod zfcp qdio 
scsi_transport_fc dasd_fba_mod dasd_mod scsi_dh_emc scsi_dh_rdac scsi_dh_alua 
  [1363037.322567] CPU: 3 PID: 37970 Comm: kworker/u128:19 Not tainted 
4.15.0-36-generic #39-Ubuntu
  [1363037.322573] Hardware name: IBM 3906 M05 7G4 (z/VM 7.1.0)
  [1363037.322581] Workqueue: iscsi_q_20 iscsi_xmitworker [libiscsi]
  [1363037.322583] Krnl PSW : 00000000c8051cf6 00000000e49a28f4 
(__iscsi_get_task+0x6/0x18 [libiscsi])
  [1363037.322587]            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 
PM:0 RI:0 EA:3
  [1363037.322589] Krnl GPRS: 0000000000000000 0000000002923ce0 
0000000000000000 0000000000000400
  [1363037.322591]            000003ff80277640 0000000000000008 
00000000788efc00 000003ff802777cc
  [1363037.322592]            000003ff8027769c 0000000000000000 
0000000000000000 0000000078ce8310
  [1363037.322594]            00000000f3689800 0000000078ce83a2 
000003ff80272e8e 0000000002923c90
  [1363037.322601] Krnl Code: 000003ff80272624: c0f4fffffcf6      brcl    
                              000003ff8027262a: c0f40000377b      brcl    
                             #000003ff80272630: c00400000000      brcl    
                             >000003ff80272636: eb012078006a      asi     
                              000003ff8027263c: c0f400003772      brcl    
                              000003ff80272642: 0707              bcr     0,%r7
                              000003ff80272644: 0707              bcr     0,%r7
                              000003ff80272646: 0707              bcr     0,%r7
  [1363037.322618] Call Trace:
  [1363037.322621] ([<000003ff80272ec6>] iscsi_xmit_task+0x86/0x138 [libiscsi])
  [1363037.322625]  [<000003ff8027769c>] iscsi_data_xmit+0x44c/0x548 [libiscsi]
  [1363037.322636]  [<000003ff802777cc>] iscsi_xmitworker+0x34/0x58 [libiscsi]
  [1363037.322642]  [<00000000001918f2>] process_one_work+0x262/0x4d8
  [1363037.322644]  [<0000000000191bc0>] worker_thread+0x58/0x4e8
  [1363037.322648]  [<0000000000198d24>] kthread+0x14c/0x168
  [1363037.322652]  [<00000000008e3eb2>] kernel_thread_starter+0xa/0x10
  [1363037.322654]  [<00000000008e3ea8>] kernel_thread_starter+0x0/0x10
  [1363037.322655] Last Breaking-Event-Address:
  [1363037.322657]  [<000003ff80272e88>] iscsi_xmit_task+0x48/0x138 [libiscsi]
  [1363037.322660] Kernel panic - not syncing: Fatal exception in interrupt

  Oops output:
    Oops: 0004 ilc:3 [#1] SMP

  *Additional Instructions for Michael Finnegan/finne...@us.ibm.com: 
  -Post a private note with access information to the machine that the bug is 
occuring on. 
  -Attach sysctl -a output output to the bug.

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