We have hit this four times today. Any ideas?
[ 169.382113] BUG: unable to handle kernel NULL pointer dereference
at (null)
[ 169.382152] IP: [<ffffffffa051e968>]
isert_login_recv_done+0x28/0x170 [ib_isert]
[ 169.382182] PGD 0
[ 169.382201] Oops: 0000 [#1] SMP
[ 169.382214] Modules linked in: ip_vs nf_conntrack macvlan bonding
target_core_user uio target_core_pscsi target_core_file
target_core_iblock iptable_filter rpcrdma ib_isert ib_iser ib_srpt
ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad
ipmi_devintf sb_edac iTCO_wdt edac_core iTCO_vendor_support
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass
zfs(PO) raid10 zunicode(PO) zavl(PO) zcommon(PO) znvpair(PO) spl(O)
joydev pcspkr i2c_i801 i2c_smbus sg lpc_ich mfd_core mei_me mei
ioatdma shpchp ipmi_si ipmi_msghandler acpi_power_meter acpi_pad
ip_tables xfs libcrc32c mlx4_en mlx4_ib rdma_cm iw_cm ib_cm raid1
mlx5_ib ib_core sd_mod 8021q garp mrp crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper
cryptd ast mlx5_core
[ 169.382550] drm_kms_helper syscopyarea sysfillrect sysimgblt
fb_sys_fops ttm mlx4_core ahci drm igb libahci dca ptp libata pps_core
i2c_algo_bit wmi sunrpc dm_mirror dm_region_hash dm_log dm_mod
[ 169.382648] CPU: 29 PID: 27710 Comm: kworker/u69:1 Tainted: P
O 4.9.32-2.el7.centos.x86_64 #1
[ 169.382699] Hardware name: Supermicro SYS-6028TP-HTFR/X10DRT-PIBF,
BIOS 1.1 08/03/2015
[ 169.382741] Workqueue: ib-comp-wq ib_cq_poll_work [ib_core]
[ 169.382761] task: ffff887ebd3c0000 task.stack: ffffc900c2258000
[ 169.382780] RIP: 0010:[<ffffffffa051e968>] [<ffffffffa051e968>]
isert_login_recv_done+0x28/0x170 [ib_isert]
[ 169.382812] RSP: 0018:ffffc900c225bd90 EFLAGS: 00010206
[ 169.382829] RAX: 0000000000000000 RBX: ffff887ec700a000 RCX: 00000000000000f0
[ 169.382852] RDX: ffff887ee0a9d080 RSI: ffff887ed46ca000 RDI: 0000000000000005
[ 169.382873] RBP: ffffc900c225bda8 R08: 0000000000000fff R09: ffff887f655a8c00
[ 169.382895] R10: 0000000000000101 R11: ffff887ed46cadd8 R12: 0000000000000040
[ 169.382917] R13: ffff887ed46ca000 R14: 0000000000000000 R15: ffff887ed46cac00
[ 169.383857] FS: 0000000000000000(0000) GS:ffff887f7f540000(0000)
knlGS:0000000000000000
[ 169.384728] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 169.385554] CR2: 0000000000000000 CR3: 0000000001c07000 CR4: 00000000001406e0
[ 169.386380] Stack:
[ 169.387223] 0000000000000000 0000000000000040 0000000000000001
ffffc900c225bde8
[ 169.388100] ffffffffa01a9d90 00010000aec95982 ffff887ed46cac40
ffff887ed46cac00
[ 169.388966] ffff887f655a8c00 ffff887f5ddbf500 00000000000008a0
ffffc900c225be08
[ 169.389865] Call Trace:
[ 169.390762] [<ffffffffa01a9d90>] __ib_process_cq+0x50/0xd0 [ib_core]
[ 169.391624] [<ffffffffa01a9e80>] ib_cq_poll_work+0x20/0x60 [ib_core]
[ 169.392527] [<ffffffff8109d0b2>] process_one_work+0x152/0x400
[ 169.393378] [<ffffffff8109d9a5>] worker_thread+0x125/0x4b0
[ 169.394224] [<ffffffff8109d880>] ? rescuer_thread+0x380/0x380
[ 169.395063] [<ffffffff8109d880>] ? rescuer_thread+0x380/0x380
[ 169.395951] [<ffffffff810a36b6>] kthread+0xe6/0x100
[ 169.396847] [<ffffffff810a35d0>] ? kthread_park+0x60/0x60
[ 169.397733] [<ffffffff8177ba55>] ret_from_fork+0x25/0x30
[ 169.398533] Code: 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 55 49 89
f5 41 54 53 48 8b 46 18 8b 7e 08 48 8b 98 98 00 00 00 85 ff 48 8b 83
48 11 00 00 <4c> 8b 20 0f 85 1f 01 00 00 49 8b 84 24 18 03 00 00 48 8b
73 20
[ 169.400367] RIP [<ffffffffa051e968>]
isert_login_recv_done+0x28/0x170 [ib_isert]
[ 169.401224] RSP <ffffc900c225bd90>
[ 169.402033] CR2: 0000000000000000
[ 169.402853] ---[ end trace 1034240ecf8f1811 ]---
[ 169.406112] BUG: unable to handle kernel paging request at ffffffffffffffd8
[ 169.407583] IP: [<ffffffff810a43c0>] kthread_data+0x10/0x20
[ 169.408401] PGD 1c0a067
[ 169.408409] PUD 1c0c067
[ 169.409154] PMD 0
[ 169.409929] Oops: 0000 [#2] SMP
[ 169.410709] Modules linked in: ip_vs nf_conntrack macvlan bonding
target_core_user uio target_core_pscsi target_core_file
target_core_iblock iptable_filter rpcrdma ib_isert ib_iser ib_srpt
ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad
ipmi_devintf sb_edac iTCO_wdt edac_core iTCO_vendor_support
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass
zfs(PO) raid10 zunicode(PO) zavl(PO) zcommon(PO) znvpair(PO) spl(O)
joydev pcspkr i2c_i801 i2c_smbus sg lpc_ich mfd_core mei_me mei
ioatdma shpchp ipmi_si ipmi_msghandler acpi_power_meter acpi_pad
ip_tables xfs libcrc32c mlx4_en mlx4_ib rdma_cm iw_cm ib_cm raid1
mlx5_ib ib_core sd_mod 8021q garp mrp crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper
cryptd ast mlx5_core
[ 169.415588] drm_kms_helper syscopyarea sysfillrect sysimgblt
fb_sys_fops ttm mlx4_core ahci drm igb libahci dca ptp libata pps_core
i2c_algo_bit wmi sunrpc dm_mirror dm_region_hash dm_log dm_mod
[ 169.417156] CPU: 29 PID: 27710 Comm: kworker/u69:1 Tainted: P
D O 4.9.32-2.el7.centos.x86_64 #1
[ 169.417887] Hardware name: Supermicro SYS-6028TP-HTFR/X10DRT-PIBF,
BIOS 1.1 08/03/2015
[ 169.418626] task: ffff887ebd3c0000 task.stack: ffffc900c2258000
[ 169.419353] RIP: 0010:[<ffffffff810a43c0>] [<ffffffff810a43c0>]
kthread_data+0x10/0x20
[ 169.420088] RSP: 0018:ffffc900c225be68 EFLAGS: 00010002
[ 169.420808] RAX: 0000000000000000 RBX: ffff887f7f559000 RCX: 000000000000001d
[ 169.421527] RDX: ffff883f7f410000 RSI: ffff887ebd3c0000 RDI: ffff887ebd3c0000
[ 169.422244] RBP: ffffc900c225be68 R08: ffff887ebd3c00a8 R09: 00000000001450d7
[ 169.422964] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000019000
[ 169.423680] R13: ffff887ebd3c0000 R14: ffff887ebd3c09c0 R15: 0000000000000000
[ 169.424398] FS: 0000000000000000(0000) GS:ffff887f7f540000(0000)
knlGS:0000000000000000
[ 169.425122] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 169.425838] CR2: 0000000000000028 CR3: 0000000001c07000 CR4: 00000000001406e0
[ 169.426553] Stack:
[ 169.427267] ffffc900c225be78 ffffffff8109e28e ffffc900c225bec8
ffffffff81776aa6
[ 169.427990] 0000000000000000 ffff887ee6435f34 ffff887ee9ba7b88
ffff887ebd3c0000
[ 169.428713] ffff887ebd3c0000 ffff887ebd3c0000 ffffc900c225b638
ffff883f66b00000
[ 169.429427] Call Trace:
[ 169.430129] [<ffffffff8109e28e>] wq_worker_sleeping+0xe/0x90
[ 169.430857] [<ffffffff81776aa6>] __schedule+0x426/0x6a0
[ 169.431566] [<ffffffff810b14c8>] do_task_dead+0x38/0x40
[ 169.432278] [<ffffffff81087f12>] do_exit+0x632/0xac0
[ 169.433064] [<ffffffff8177d0c7>] rewind_stack_do_exit+0x17/0x20
[ 169.433743] Code: 55 be 01 00 00 00 48 89 e5 e8 dd fe ff ff 5d c3
90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 8b 87 48 09 00
00 48 89 e5 <48> 8b 40 d8 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44
00 00
[ 169.435285] RIP [<ffffffff810a43c0>] kthread_data+0x10/0x20
[ 169.436008] RSP <ffffc900c225be68>
[ 169.436727] CR2: ffffffffffffffd8
[ 169.437448] ---[ end trace 1034240ecf8f1812 ]---
[ 169.440151] Fixing recursive fault but reboot is needed!
----------------
Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
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