------- Comment From [email protected] 2018-11-20 15:44 EDT------- (In reply to comment #6) > Did this issue start happening after an update/upgrade?
Host run with latest maintenance updates associated with the installed kernel. For this case, this issue has been seen twice on the host associated with this defect number (a) 4.15.0-36-generic #39-Ubuntu - /var/dump/201811161956/dmesg.201811161956 (b) 4.15.0-23-generic #25-Ubuntu - /var/dump/201809121135/dmesg.201809121135 Most recently, provided with this defect number (a) 4.15.0-36-generic #39-Ubuntu /var/dump/201811161956 dmesg.201811161956 dump.201811161956 Prior occurrence was as follows (b) 4.15.0-23-generic #25-Ubuntu /var/dump/201809121135 dmesg.201809121135 dump.201809121135 Stack trace output: dmesg.201809121135 [479123.425602] Unable to handle kernel pointer dereference in virtual kernel address space [479123.425611] Failing address: 0000000000000000 TEID: 0000000000000483 [479123.425614] Fault in home space mode while using kernel ASCE. [479123.425618] AS:0000000000e9c007 R3:00000000f37d0007 S:00000000f37ff000 P:000000000000013d [479123.425672] Oops: 0004 ilc:3 [#1] SMP [479123.425677] Modules linked in: iptable_filter binfmt_misc rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache dasd_eckd_mod 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 iscsi_tcp sunrpc libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables dm_round_robin dm_service_time crc32_vx_s390 dasd_fba_mod dasd_mod zfcp qdio scsi_transport_fc scsi_dh_emc scsi_dh_rdac scsi_dh_alua dm_multipath [479123.425724] CPU: 2 PID: 19195 Comm: kworker/u128:0 Not tainted 4.15.0-23-generic #25-Ubuntu [479123.425731] Hardware name: IBM 3906 M05 7G4 (z/VM 7.1.0) [479123.425744] Workqueue: iscsi_q_9 iscsi_xmitworker [libiscsi] [479123.425746] Krnl PSW : 00000000a880894f 000000000803fc8a (__iscsi_get_task+0x6/0x18 [libiscsi]) [479123.425752] 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 [479123.425755] Krnl GPRS: 0000000084102000 000000005965fce0 0000000000000000 0000000080000400 [479123.425756] 000003ff801d7640 0000000000000008 00000000cded0000 000003ff801d77cc [479123.425758] 000003ff801d769c 0000000000000000 0000000000000000 00000000cd0e0310 [479123.425759] 00000000f3689800 00000000cd0e03a2 000003ff801d2e8e 000000005965fc90 [479123.425771] Krnl Code: 000003ff801d2624: c0f4fffffcf6 brcl 15,3ff801d2010 000003ff801d262a: c0f40000377b brcl 15,3ff801d9520 #000003ff801d2630: c00400000000 brcl 0,3ff801d2630 >000003ff801d2636: eb012078006a asi 120(%r2),1 000003ff801d263c: c0f400003772 brcl 15,3ff801d9520 000003ff801d2642: 0707 bcr 0,%r7 000003ff801d2644: 0707 bcr 0,%r7 000003ff801d2646: 0707 bcr 0,%r7 [479123.425804] Call Trace: [479123.425808] ([<000003ff801d2ec6>] iscsi_xmit_task+0x86/0x138 [libiscsi]) [479123.425810] [<000003ff801d769c>] iscsi_data_xmit+0x44c/0x548 [libiscsi] [479123.425822] [<000003ff801d77cc>] iscsi_xmitworker+0x34/0x58 [libiscsi] [479123.425831] [<0000000000191292>] process_one_work+0x262/0x4d8 [479123.425833] [<0000000000191560>] worker_thread+0x58/0x4e8 [479123.425838] [<00000000001986c4>] kthread+0x14c/0x168 [479123.425843] [<00000000008e174a>] kernel_thread_starter+0xa/0x10 [479123.425846] [<00000000008e1740>] kernel_thread_starter+0x0/0x10 [479123.425847] Last Breaking-Event-Address: [479123.425850] [<000003ff801d2e88>] iscsi_xmit_task+0x48/0x138 [libiscsi] [479123.425851] [479123.425853] Kernel panic - not syncing: Fatal exception in interrupt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1804149 Title: Kernel panic,Oops: 0004 ilc:3 [#1] SMP, iscsi_q_20 iscsi_xmitworker [libiscsi] Status in Ubuntu on IBM z Systems: Triaged Status in linux package in Ubuntu: Triaged Bug description: == Comment: #0 - Michael Finnegan <[email protected]> - 2018-11-19 14:14:40 == ---Problem Description--- Kernel panic,Oops: 0004 ilc:3 [#1] SMP, iscsi_q_20 iscsi_xmitworker [libiscsi] ---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) ---Debugger--- A debugger is not configured Contact Information = Michael Finnegan/[email protected] Stack trace output: dmesg.201811161956 [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 P:000000000000013d [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 dm_multipath [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 15,3ff80272010 000003ff8027262a: c0f40000377b brcl 15,3ff80279520 #000003ff80272630: c00400000000 brcl 0,3ff80272630 >000003ff80272636: eb012078006a asi 120(%r2),1 000003ff8027263c: c0f400003772 brcl 15,3ff80279520 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] [1363037.322658] [1363037.322660] Kernel panic - not syncing: Fatal exception in interrupt Oops output: Oops: 0004 ilc:3 [#1] SMP *Additional Instructions for Michael Finnegan/[email protected]: -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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