Output from Server:
[root@reg-l-vrt-036-005 ~]# tgtd
[root@reg-l-vrt-036-005 ~]# tgt-setup-lun -n tgt0 -d /tmp/null -b null -t iser
Using transport: iser
Creating new target (name=iqn.2001-04.com.reg-l-vrt-036-005-tgt0, tid=1)
Adding a logical unit (/tmp/null) to target, tid=1
Setting backing store type: null
Accepting connections from all initiators
Client Side (initator):
1- Check if targe is up before loging: # iscsiadm -m node
2- Login to target: # iscsiadm -m node -l
3- Logout from target: # iscsiadm -m node -u
Output from Client:
[root@reg-l-vrt-037-005 ~]# iscsiadm -m node
11.135.196.5:3260,1 iqn.2001-04.com.reg-l-vrt-036-005-tgt0
[root@reg-l-vrt-037-005 ~]# iscsiadm -m node -l
Logging in to [iface: default, target: iqn.2001-04.com.reg-l-vrt-036-005-tgt0, portal: 11.135.196.5,3260] (multiple)
Login to [iface: default, target: iqn.2001-04.com.reg-l-vrt-036-005-tgt0, portal: 11.135.196.5,3260] successful.
[root@reg-l-vrt-037-005 ~]# iscsiadm -m node -u
Logging out of session [sid: 1, target: iqn.2001-04.com.reg-l-vrt-036-005-tgt0, portal: 11.135.196.5,3260]
iscsi logout via iSER cause kernel panic, To reproduce need to do the following:
Server Side (target): 1- Start target: # tgtd 2- Setup target device: # tgt-setup-lun -n tgt0 -d /tmp/null -b null -t iser
Client Side (initator): 1- Check if targe is up before loging: # iscsiadm -m node 2- Login to target: # iscsiadm -m node -l 3- Logout from target: # iscsiadm -m node -u
Kernel Panic:
[14904.748106] iser: iser_conn_terminate: conn ffff8807c021a000 failed to post beacon [14904.750248] BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 [14904.751136] IP: [] iser_cq_tasklet_fn+0x6a/0x230 [ib_iser]
[14904.751136] PGD 0
[14904.751136] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[14904.751136] Modules linked in: sd_mod ib_iser libiscsi scsi_transport_iscsi ib_rxe rdma_ucm rdma_cm iw_cm ib_cm ib_uverbs ib_sa ib_mad ib_core mlx4_en ib_addr mlx4_core vxlan ip6_udp_tunnel udp_tunnel ptp pps_core nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache ppdev cfg80211 rfkill sg snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm kvm_intel kvm snd_timer snd serio_raw virtio_balloon pcspkr soundcore i2c_piix4 parport_pc parport dm_mirror acpi_cpufreq dm_region_hash dm_log dm_mod nfsd auth_rpcgss nfs_acl lockd grace sunrpc uinput ext4 mbcache jbd2 cirrus ata_generic pata_acpi syscopyarea sysfillrect sysimgblt drm_kms_helper virtio_net ttm virtio_blk drm ata_piix libata i2c_core virtio_pci virtio_ring virtio floppy [last unloaded: mlx4_ib]
[14904.751136] CPU: 2 PID: 17142 Comm: iscsid Not tainted 4.0.0-rc4+ #13
[14904.751136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[14904.751136] task: ffff8807e02d3460 ti: ffff8807e2814000 task.ti: ffff8807e2814000
[14904.751136] RIP: 0010:[] [] iser_cq_tasklet_fn+0x6a/0x230 [ib_iser]
[14904.751136] RSP: 0018:ffff8807ec003e78 EFLAGS: 00010206
[14904.751136] RAX: 0000000000000000 RBX: ffff8807cf092410 RCX: 0000000000000005
[14904.751136] RDX: 00000000000000b3 RSI: 0000000000000010 RDI: ffff8807d108d100
[14904.751136] RBP: ffff8807ec003ec8 R08: ffff8807d108d100 R09: ffff8807cf6e3000
[14904.751136] R10: ffff8807cf092410 R11: 0000000000002c80 R12: 0000000000000010
[14904.751136] R13: 0000000000000000 R14: ffff8807cf6e3040 R15: ffff8807cf092010
[14904.751136] FS: 00007f33f7659740(0000) GS:ffff8807ec000000(0000) knlGS:0000000000000000
[14904.751136] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[14904.751136] CR2: 0000000000000070 CR3: 00000007cf6bc000 CR4: 00000000000007e0
[14904.751136] Stack:
[14904.751136] ffff8807e02d3460 ffffffff8108c99e ffff8807cf092050 ffff8807cf092010
[14904.751136] ffff8807ec003eb8 ffff8807cf092410 0000000000000000 ffff8807cf092418
[14904.751136] 0000000000000100 0000000000000048 ffff8807ec003ef8 ffffffff8108cb97
[14904.751136] Call Trace:
[14904.751136]
[14904.751136] [] ? tasklet_action+0x4e/0x2d0
[14904.751136] [] tasklet_action+0x247/0x2d0
[14904.751136] [] do_softirq+0xf6/0x670
[14904.751136] [] irq_exit+0x125/0x130
[14904.751136] [] smp_apic_timer_interrupt+0x4a/0x60
[14904.751136] [] apic_timer_interrupt+0x72/0x80
[14904.751136]
[14904.751136] [] ? queue_work_on+0x5b/0xa0
[14904.751136] [] iscsi_iser_ep_disconnect+0xb1/0x120 [ib_iser]
[14904.751136] [] iscsi_if_ep_disconnect.isra.14+0x5f/0x80 [scsi_transport_iscsi]
[14904.751136] [] iscsi_if_recv_msg+0x1136/0x14a0 [scsi_transport_iscsi]
[14904.751136] [] ? iscsi_if_rx+0x3a/0x200 [scsi_transport_iscsi]
[14904.751136] [] ? sched_clock_cpu+0xa8/0xd0
[14904.751136] [] ? iscsi_if_rx+0x3a/0x200 [scsi_transport_iscsi]
[14904.751136] [] ? local_clock+0x15/0x30
[14904.751136] [] ? netlink_deliver_tap+0x87/0x270
[14904.751136] [] iscsi_if_rx+0x96/0x200 [scsi_transport_iscsi]
[14904.751136] [] netlink_unicast+0x103/0x1e0
[14904.751136] [] netlink_sendmsg+0x43d/0x670
[14904.751136] [] ? might_fault+0x5f/0xb0
[14904.751136] [] sock_sendmsg+0x37/0x50
[14904.751136] [] _sys_sendmsg+0x319/0x330
[14904.751136] [] ? sched_clock+0x9/0x10
[14904.751136] [] ? kvm_clock_read+0x25/0x30
[14904.751136] [] ? sched_clock+0x9/0x10
[14904.751136] [] ? sched_clock_local+0x25/0x90
[14904.751136] [] ? sched_clock_cpu+0xa8/0xd0
[14904.751136] [] ? rcu_read_lock_held+0x6e/0x80
[14904.751136] [] ? fget_light+0xbe/0xe0
[14904.751136] [] sys_sendmsg+0x51/0x90
[14904.751136] [] SyS_sendmsg+0x12/0x20
[14904.751136] [] system_call_fastpath+0x12/0x17
[14904.751136] Code: 4c 89 fa ff 90 10 03 00 00 85 c0 41 89 c4 7e 55 8d 58 ff 48 c1 e3 06 48 03 5d c0 66 0f 1f 44 00 00 41 8b 4f 08 49 8b 47 18 85 c9 <4c> 8b 50 70 75 79 41 8b 57 0c 81 fa 80 00 00 00 74 5c 85 d2 0f
[14904.751136] RIP [] iser_cq_tasklet_fn+0x6a/0x230 [ib_iser]
[14904.751136] RSP
[14904.751136] CR2: 0000000000000070
[14904.751136] ------------[ cut here ]------------
[14904.751136] kernel BUG at mm/vmalloc.c:1315!
[14904.751136] invalid opcode: 0000 [#2] SMP DEBUG_PAGEALLOC
[14904.751136] Modules linked in: sd_mod ib_iser libiscsi scsi_transport_iscsi ib_rxe rdma_ucm rdma_cm iw_cm ib_cm ib_uverbs ib_sa ib_mad ib_core mlx4_en ib_addr mlx4_core vxlan ip6_udp_tunnel udp_tunnel ptp pps_core nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache ppdev cfg80211 rfkill sg snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm kvm_intel kvm snd_timer snd serio_raw virtio_balloon pcspkr soundcore i2c_piix4 parport_pc parport dm_mirror acpi_cpufreq dm_region_hash dm_log dm_mod nfsd auth_rpcgss nfs_acl lockd grace sunrpc uinput ext4 mbcache jbd2 cirrus ata_generic pata_acpi syscopyarea sysfillrect sysimgblt drm_kms_helper virtio_net ttm virtio_blk drm ata_piix libata i2c_core virtio_pci virtio_ring virtio floppy [last unloaded: mlx4_ib]
[14904.751136] CPU: 2 PID: 17142 Comm: iscsid Not tainted 4.0.0-rc4+ #13
[14904.751136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[14904.751136] task: ffff8807e02d3460 ti: ffff8807e2814000 task.ti: ffff8807e2814000
[14904.751136] RIP: 0010:[] [] get_vm_area_node+0x158/0x160
[14904.751136] RSP: 0018:ffff8807ec0032f8 EFLAGS: 00010006
[14904.751136] RAX: 0000000000000100 RBX: 00000000ffffffff RCX: ffffc90000000000
[14904.751136] RDX: 0000000000000022 RSI: 0000000000000001 RDI: 0000000000002000
[14904.751136] RBP: ffff8807ec003338 R08: ffffe8ffffffffff R09: 00000000ffffffff
[14904.751136] R10: ffffc90000000000 R11: 0000000000002cdf R12: 00000000000080d2
[14904.751136] R13: 0000000000001200 R14: 0000000000000080 R15: ffffea0002ea3040
[14904.751136] FS: 00007f33f7659740(0000) GS:ffff8807ec000000(0000) knlGS:0000000000000000
[14904.751136] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[14904.751136] CR2: 0000000000000070 CR3: 00000007cf6bc000 CR4: 00000000000007e0
[14904.751136] Stack:
[14904.751136] ffff8807e516ca57 ffffc90000000000 ffff8807ec003438 00000000ffffffff
[14904.751136] 00000000000080d2 0000000000001200 0000000000000080 ffffea0002ea3040
[14904.751136] ffff8807ec0033a8 ffffffff8120a8c3 00000000000080d2 ffffffffa012931d
[14904.751136] Call Trace:
[14904.751136]
[14904.751136] [] vmalloc_node_range+0x73/0x2c0
[14904.751136] [] ? ttm_tt_init+0x6d/0xb0 [ttm]
[14904.751136] [] ? probe_kernel_read+0x31/0x60
[14904.751136] [] __vmalloc+0x4a/0x50
[14904.751136] [] ? ttm_tt_init+0x6d/0xb0 [ttm]
[14904.751136] [] ttm_tt_init+0x6d/0xb0 [ttm]
[14904.751136] [] cirrus_ttm_tt_create+0x5c/0x90 [cirrus]
[14904.751136] [] ttm_bo_add_ttm+0x9d/0xe0 [ttm]
[14904.751136] [] ttm_bo_handle_move_mem+0x561/0x5a0 [ttm]
[14904.751136] [] ? leave_mm+0x180/0x180
[14904.751136] [] ? ttm_bo_mem_space+0xe4/0x350 [ttm]
[14904.751136] [] ttm_bo_validate+0x290/0x2b0 [ttm]
[14904.751136] [] ? iounmap+0x84/0xb0
[14904.751136] [] cirrus_bo_push_sysram+0x93/0xe0 [cirrus]
[14904.751136] [] cirrus_crtc_do_set_base.isra.9.constprop.11+0x86/0x420 [cirrus]
[14904.751136] [] cirrus_crtc_mode_set+0x45b/0x4e0 [cirrus]
[14904.751136] [] drm_crtc_helper_set_mode+0x305/0x560 [drm_kms_helper]
[14904.751136] [] drm_crtc_helper_set_config+0x88d/0xab0 [drm_kms_helper]
[14904.751136] [] drm_mode_set_config_internal+0x72/0x120 [drm]
[14904.751136] [] drm_fb_helper_pan_display+0xa0/0x100 [drm_kms_helper]
[14904.751136] [] fb_pan_display+0xda/0x1b0
[14904.751136] [] bit_update_start+0x20/0x50
[14904.751136] [] fbcon_switch+0x3ab/0x5b0
[14904.751136] [] redraw_screen+0x1a9/0x250
[14904.751136] [] fbcon_blank+0x22a/0x2f0
[14904.751136] [] ? mod_timer+0x10e/0x3a0
[14904.751136] [] ? trace_hardirqs_off+0xd/0x10
[14904.751136] [] ? _raw_spin_unlock_irqrestore+0x5f/0x70
[14904.751136] [] ? mod_timer+0x137/0x3a0
[14904.751136] [] do_unblank_screen+0xc0/0x200
[14904.751136] [] unblank_screen+0x10/0x20
[14904.751136] [] bust_spinlocks+0x19/0x40
[14904.751136] [] oops_end+0x3c/0x120
[14904.751136] [] no_context+0x2f3/0x370
[14904.751136] [] bad_area_nosemaphore+0x7e/0x1d7
[14904.751136] [] ? task_cputime+0x44/0x80
[14904.751136] [] bad_area_nosemaphore+0x13/0x15
[14904.751136] [] do_page_fault+0x86/0x470
[14904.751136] [] ? lock_is_held+0x5f/0x90
[14904.751136] [] trace_do_page_fault+0x70/0x440
[14904.751136] [] ? trace_hardirqs_off_thunk+0x3a/0x3c
[14904.751136] [] do_async_page_fault+0x1e/0xd0
[14904.751136] [] async_page_fault+0x28/0x30
[14904.751136] [] ? iser_cq_tasklet_fn+0x6a/0x230 [ib_iser]
[14904.751136] [] ? iser_cq_tasklet_fn+0x48/0x230 [ib_iser]
[14904.751136] [] ? tasklet_action+0x4e/0x2d0
[14904.751136] [] tasklet_action+0x247/0x2d0
[14904.751136] [] do_softirq+0xf6/0x670
[14904.751136] [] irq_exit+0x125/0x130
[14904.751136] [] smp_apic_timer_interrupt+0x4a/0x60
[14904.751136] [] apic_timer_interrupt+0x72/0x80
[14904.751136]
[14904.751136] [] ? queue_work_on+0x5b/0xa0
[14904.751136] [] iscsi_iser_ep_disconnect+0xb1/0x120 [ib_iser]
[14904.751136] [] iscsi_if_ep_disconnect.isra.14+0x5f/0x80 [scsi_transport_iscsi]
[14904.751136] [] iscsi_if_recv_msg+0x1136/0x14a0 [scsi_transport_iscsi]
[14904.751136] [] ? iscsi_if_rx+0x3a/0x200 [scsi_transport_iscsi]
[14904.751136] [] ? sched_clock_cpu+0xa8/0xd0
[14904.751136] [] ? iscsi_if_rx+0x3a/0x200 [scsi_transport_iscsi]
[14904.751136] [] ? local_clock+0x15/0x30
[14904.751136] [] ? netlink_deliver_tap+0x87/0x270
[14904.751136] [] iscsi_if_rx+0x96/0x200 [scsi_transport_iscsi]
[14904.751136] [] netlink_unicast+0x103/0x1e0
[14904.751136] [] netlink_sendmsg+0x43d/0x670
[14904.751136] [] ? might_fault+0x5f/0xb0
[14904.751136] [] sock_sendmsg+0x37/0x50
[14904.751136] [] _sys_sendmsg+0x319/0x330
[14904.751136] [] ? sched_clock+0x9/0x10
[14904.751136] [] ? kvm_clock_read+0x25/0x30
[14904.751136] [] ? sched_clock+0x9/0x10
[14904.751136] [] ? sched_clock_local+0x25/0x90
[14904.751136] [] ? sched_clock_cpu+0xa8/0xd0
[14904.751136] [] ? rcu_read_lock_held+0x6e/0x80
[14904.751136] [] ? fget_light+0xbe/0xe0
[14904.751136] [] sys_sendmsg+0x51/0x90
[14904.751136] [] SyS_sendmsg+0x12/0x20
[14904.751136] [] system_call_fastpath+0x12/0x17
[14904.751136] Code: 00 00 00 0f bd cf 83 c1 01 83 f9 0c 0f 4c c8 b0 13 83 f9 13 0f 4f c8 49 d3 e6 e9 f5 fe ff ff 48 89 df e8 fc d7 01 00 31 c0 eb b3 <0f> 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 55 49 89 c8 41 b9 ff ff
[14904.751136] RIP [] get_vm_area_node+0x158/0x160
[14904.751136] RSP
[14904.751136] ---[ end trace 5bfb3e658c1ce2e3 ]---
[14904.751136] Kernel panic - not syncing: Fatal exception in interrupt
[14904.751136] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff)
[14904.751136] drm_kms_helper: panic occurred, switching back to text console
[14904.751136] ---[ end Kernel panic - not syncing: Fatal exception in interrupt
[14905.359695] ------------[ cut here ]------------
[14905.360690] WARNING: CPU: 2 PID: 17142 at arch/x86/kernel/smp.c:124 native_smp_send_reschedule+0x5d/0x60()
[14905.360690] Modules linked in: sd_mod ib_iser libiscsi scsi_transport_iscsi ib_rxe rdma_ucm rdma_cm iw_cm ib_cm ib_uverbs ib_sa ib_mad ib_core mlx4_en ib_addr mlx4_core vxlan ip6_udp_tunnel udp_tunnel ptp pps_core nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache ppdev cfg80211 rfkill sg snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm kvm_intel kvm snd_timer snd serio_raw virtio_balloon pcspkr soundcore i2c_piix4 parport_pc parport dm_mirror acpi_cpufreq dm_region_hash dm_log dm_mod nfsd auth_rpcgss nfs_acl lockd grace sunrpc uinput ext4 mbcache jbd2 cirrus ata_generic pata_acpi syscopyarea sysfillrect sysimgblt drm_kms_helper virtio_net ttm virtio_blk drm ata_piix libata i2c_core virtio_pci virtio_ring virtio floppy [last unloaded: mlx4_ib]
[14905.360690] CPU: 2 PID: 17142 Comm: iscsid Tainted: G D 4.0.0-rc4+ #13
[14905.360690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[14905.360690] 0000000000000000 00000000b1d0bd73 ffff8807ec002d20 ffffffff81743f13
[14905.360690] 0000000000000000 0000000000000000 ffff8807ec002d60 ffffffff81086e1a
[14905.360690] ffff880700000000 0000000000000000 0000000000000002 000000000000e928
[14905.360690] Call Trace:
[14905.360690] [] dump_stack+0x4c/0x65
[14905.360690] [] warn_slowpath_common+0x8a/0xc0
[14905.360690] [] warn_slowpath_null+0x1a/0x20
[14905.360690] [] native_smp_send_reschedule+0x5d/0x60
[14905.360690] [] trigger_load_balance+0x33d/0x470
[14905.360690] [] ? trigger_load_balance+0x74/0x470
[14905.360690] [] scheduler_tick+0x9a/0xe0
[14905.360690] [] update_process_times+0x51/0x60
[14905.360690] [] tick_sched_handle.isra.20+0x25/0x60
[14905.360690] [] tick_sched_timer+0x44/0x80
[14905.360690] [] __run_hrtimer+0xcd/0x6d0
[14905.360690] [] ? hrtimer_interrupt+0x92/0x240
[14905.360690] [] ? tick_sched_do_timer+0x50/0x50
[14905.360690] [] hrtimer_interrupt+0x103/0x240
[14905.360690] [] local_apic_timer_interrupt+0x39/0x60
[14905.360690] [] smp_apic_timer_interrupt+0x45/0x60
[14905.360690] [] apic_timer_interrupt+0x72/0x80
[14905.360690] [] ? panic+0x1c6/0x20e
[14905.360690] [] ? panic+0x1cd/0x20e
[14905.360690] [] ? panic+0x1c6/0x20e
[14905.360690] [] oops_end+0x117/0x120
[14905.360690] [] die+0x4b/0x70
[14905.360690] [] do_trap+0xb0/0x150
[14905.360690] [] do_error_trap+0xa4/0x180
[14905.360690] [] ? sched_clock+0x9/0x10
[14905.360690] [] ? sched_clock_local+0x25/0x90
[14905.360690] [] ? get_vm_area_node+0x158/0x160
[14905.360690] [] ? select_task_rq_fair+0x4a3/0x7c0
[14905.360690] [] ? select_idle_sibling+0x2b/0x180
[14905.360690] [] ? trace_hardirqs_off_thunk+0x3a/0x3c
[14905.360690] [] do_invalid_op+0x20/0x30
[14905.360690] [] invalid_op+0x1e/0x30
[14905.360690] [] ? get_vm_area_node+0x158/0x160
[14905.360690] [] ? cirrus_imageblit+0x2f/0x40 [cirrus]
[14905.360690] [] vmalloc_node_range+0x73/0x2c0
[14905.360690] [] ? ttm_tt_init+0x6d/0xb0 [ttm]
[14905.360690] [] ? probe_kernel_read+0x31/0x60
[14905.360690] [] vmalloc+0x4a/0x50
[14905.360690] [] ? ttm_tt_init+0x6d/0xb0 [ttm]
[14905.360690] [] ttm_tt_init+0x6d/0xb0 [ttm]
[14905.360690] [] cirrus_ttm_tt_create+0x5c/0x90 [cirrus]
[14905.360690] [] ttm_bo_add_ttm+0x9d/0xe0 [ttm]
[14905.360690] [] ttm_bo_handle_move_mem+0x561/0x5a0 [ttm]
[14905.360690] [] ? leave_mm+0x180/0x180
[14905.360690] [] ? ttm_bo_mem_space+0xe4/0x350 [ttm]
[14905.360690] [] ttm_bo_validate+0x290/0x2b0 [ttm]
[14905.360690] [] ? iounmap+0x84/0xb0
[14905.360690] [] cirrus_bo_push_sysram+0x93/0xe0 [cirrus]
[14905.360690] [] cirrus_crtc_do_set_base.isra.9.constprop.11+0x86/0x420 [cirrus]
[14905.360690] [] cirrus_crtc_mode_set+0x45b/0x4e0 [cirrus]
[14905.360690] [] drm_crtc_helper_set_mode+0x305/0x560 [drm_kms_helper]
[14905.360690] [] drm_crtc_helper_set_config+0x88d/0xab0 [drm_kms_helper]
[14905.360690] [] drm_mode_set_config_internal+0x72/0x120 [drm]
[14905.360690] [] drm_fb_helper_pan_display+0xa0/0x100 [drm_kms_helper]
[14905.360690] [] fb_pan_display+0xda/0x1b0
[14905.360690] [] bit_update_start+0x20/0x50
[14905.360690] [] fbcon_switch+0x3ab/0x5b0
[14905.360690] [] redraw_screen+0x1a9/0x250
[14905.360690] [] fbcon_blank+0x22a/0x2f0
[14905.360690] [] ? mod_timer+0x10e/0x3a0
[14905.360690] [] ? trace_hardirqs_off+0xd/0x10
[14905.360690] [] ? _raw_spin_unlock_irqrestore+0x5f/0x70
[14905.360690] [] ? mod_timer+0x137/0x3a0
[14905.360690] [] do_unblank_screen+0xc0/0x200
[14905.360690] [] unblank_screen+0x10/0x20
[14905.360690] [] bust_spinlocks+0x19/0x40
[14905.360690] [] oops_end+0x3c/0x120
[14905.360690] [] no_context+0x2f3/0x370
[14905.360690] [] bad_area_nosemaphore+0x7e/0x1d7
[14905.360690] [] ? task_cputime+0x44/0x80
[14905.360690] [] bad_area_nosemaphore+0x13/0x15
[14905.360690] [] do_page_fault+0x86/0x470
[14905.360690] [] ? lock_is_held+0x5f/0x90
[14905.360690] [] trace_do_page_fault+0x70/0x440
[14905.360690] [] ? trace_hardirqs_off_thunk+0x3a/0x3c
[14905.360690] [] do_async_page_fault+0x1e/0xd0
[14905.360690] [] async_page_fault+0x28/0x30
[14905.360690] [] ? iser_cq_tasklet_fn+0x6a/0x230 [ib_iser]
[14905.360690] [] ? iser_cq_tasklet_fn+0x48/0x230 [ib_iser]
[14905.360690] [] ? tasklet_action+0x4e/0x2d0
[14905.360690] [] tasklet_action+0x247/0x2d0
[14905.360690] [] do_softirq+0xf6/0x670
[14905.360690] [] irq_exit+0x125/0x130
[14905.360690] [] smp_apic_timer_interrupt+0x4a/0x60
[14905.360690] [] apic_timer_interrupt+0x72/0x80
[14905.360690] [] ? queue_work_on+0x5b/0xa0
[14905.360690] [] iscsi_iser_ep_disconnect+0xb1/0x120 [ib_iser]
[14905.360690] [] iscsi_if_ep_disconnect.isra.14+0x5f/0x80 [scsi_transport_iscsi]
[14905.360690] [] iscsi_if_recv_msg+0x1136/0x14a0 [scsi_transport_iscsi]
[14905.360690] [] ? iscsi_if_rx+0x3a/0x200 [scsi_transport_iscsi]
[14905.360690] [] ? sched_clock_cpu+0xa8/0xd0
[14905.360690] [] ? iscsi_if_rx+0x3a/0x200 [scsi_transport_iscsi]
[14905.360690] [] ? local_clock+0x15/0x30
[14905.360690] [] ? netlink_deliver_tap+0x87/0x270
[14905.360690] [] iscsi_if_rx+0x96/0x200 [scsi_transport_iscsi]
[14905.360690] [] netlink_unicast+0x103/0x1e0
[14905.360690] [] netlink_sendmsg+0x43d/0x670
[14905.360690] [] ? might_fault+0x5f/0xb0
[14905.360690] [] sock_sendmsg+0x37/0x50
[14905.360690] [] _sys_sendmsg+0x319/0x330
[14905.360690] [] ? sched_clock+0x9/0x10
[14905.360690] [] ? kvm_clock_read+0x25/0x30
[14905.360690] [] ? sched_clock+0x9/0x10
[14905.360690] [] ? sched_clock_local+0x25/0x90
[14905.360690] [] ? sched_clock_cpu+0xa8/0xd0
[14905.360690] [] ? rcu_read_lock_held+0x6e/0x80
[14905.360690] [] ? __fget_light+0xbe/0xe0
[14905.360690] [] sys_sendmsg+0x51/0x90
[14905.360690] [] SyS_sendmsg+0x12/0x20
[14905.360690] [] system_call_fastpath+0x12/0x17
[14905.360690] ---[ end trace 5bfb3e658c1ce2e4 ]---