[ 4738.044119] end_device-6:0:0: mptsas: ioc2: removing sata device: fw_channel 0, fw_id 8, phy 0,sas_addr 0x5001940000752200 [ 4738.044126] phy-6:0:8: mptsas: ioc2: delete phy 0, phy-obj (0xffff883f21a80c00) [ 4738.044143] port-6:0:0: mptsas: ioc2: delete port 0, sas_addr (0x5001940000752200) [ 4738.051435] end_device-6:0:3: mptsas: ioc2: removing ssp device: fw_channel 0, fw_id 13, phy 5,sas_addr 0x5000c5000184240d [ 4738.051442] phy-6:0:13: mptsas: ioc2: delete phy 5, phy-obj (0xffff883f21a86c00) [ 4738.051456] port-6:0:3: mptsas: ioc2: delete port 3, sas_addr (0x5000c5000184240d) [ 4738.054796] end_device-6:0:2: mptsas: ioc2: removing sata device: fw_channel 0, fw_id 12, phy 4,sas_addr 0x5001940000752204 [ 4738.054801] phy-6:0:12: mptsas: ioc2: delete phy 4, phy-obj (0xffff883f21a85400) [ 4738.054814] port-6:0:2: mptsas: ioc2: delete port 2, sas_addr (0x5001940000752204) [ 4738.062425] end_device-6:0:1: mptsas: ioc2: removing ssp device: fw_channel 0, fw_id 9, phy 1,sas_addr 0x5000c5000182d58d [ 4738.062432] phy-6:0:9: mptsas: ioc2: delete phy 1, phy-obj (0xffff883f21a82400) [ 4738.062446] port-6:0:1: mptsas: ioc2: delete port 1, sas_addr (0x5000c5000182d58d) [ 4738.062558] end_device-6:0:0: mptsas: ioc2: removing sata device: fw_channel 0, fw_id 8, phy 0,sas_addr 0x5001940000752200 [ 4738.062560] phy-6:0:8: mptsas: ioc2: delete phy 0, phy-obj (0xffff883f21a80c00) [ 4738.062564] port-6:0:0: mptsas: ioc2: delete port 0, sas_addr (0x5001940000752200) [ 4738.062937] end_device-6:0:7: mptsas: ioc2: removing ssp device: fw_channel 0, fw_id 32, phy 24,sas_addr 0x500194000075223e [ 4738.062939] phy-6:0:32: mptsas: ioc2: delete phy 24, phy-obj (0xffff883f21a78800) [ 4738.062946] port-6:0:7: mptsas: ioc2: delete port 7, sas_addr (0x500194000075223e) [ 4738.065679] end_device-6:0:5: mptsas: ioc2: removing sata device: fw_channel 0, fw_id 20, phy 12,sas_addr 0x500194000075220c [ 4738.065683] phy-6:0:20: mptsas: ioc2: delete phy 12, phy-obj (0xffff883f21a9a000) [ 4738.065698] port-6:0:5: mptsas: ioc2: delete port 5, sas_addr (0x500194000075220c) [ 4738.074843] end_device-6:0:4: mptsas: ioc2: removing sata device: fw_channel 0, fw_id 16, phy 8,sas_addr 0x5001940000752208 [ 4738.074856] phy-6:0:16: mptsas: ioc2: delete phy 8, phy-obj (0xffff883f21a82000) [ 4738.074883] port-6:0:4: mptsas: ioc2: delete port 4, sas_addr (0x5001940000752208) [ 4738.136115] sd 6:0:3:0: [sdl] Synchronizing SCSI cache [ 4738.136192] sd 6:0:3:0: [sdl] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [ 4738.225172] ------------[ cut here ]------------ [ 4738.225188] WARNING: CPU: 0 PID: 19546 at fs/sysfs/group.c:237 sysfs_remove_group+0x89/0x90 [ 4738.225189] sysfs group 'power' not found for kobject 'target6:0:0' [ 4738.225191] Modules linked in: iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi serpent_sse2_x86_64 serpent_generic ablk_helper algif_skcipher af_alg vmnet(O) vmblock(O) vmmon(O) vmw_vsock_vmci_transport vsock vmw_vmci nfsd rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs lockd grace sunrpc bonding cachefiles fscache binfmt_misc usb_storage ipmi_ssif pl2303 amdgpu usbserial snd_oxygen dcdbas i2c_algo_bit snd_oxygen_lib drm_kms_helper snd_hda_codec_hdmi coretemp snd_mpu401_uart cfbfillrect syscopyarea snd_rawmidi cfbimgblt sr_mod sysfillrect snd_seq_device sysimgblt cdrom snd_hda_intel fb_sys_fops mptsas cfbcopyarea snd_hda_codec ttm snd_hda_core drm snd_hwdep snd_pcm snd_timer snd soundcore i7300_edac bnx2 edac_core mptspi mptscsih ipmi_si mptbase ipmi_devintf xhci_pci ipmi_msghandler xhci_hcd [ 4738.225270] CPU: 0 PID: 19546 Comm: kworker/0:9 Tainted: G O 4.11.5+ #8 [ 4738.225272] Hardware name: Dell Inc. PowerEdge R900/0TT975, BIOS 1.2.0 11/11/2010 [ 4738.225283] Workqueue: mpt/2 mptsas_firmware_event_work [mptsas] [ 4738.225285] Call Trace: [ 4738.225297] dump_stack+0x4d/0x65 [ 4738.225303] __warn+0xc7/0xf0 [ 4738.225304] warn_slowpath_fmt+0x46/0x50 [ 4738.225306] sysfs_remove_group+0x89/0x90 [ 4738.225310] dpm_sysfs_remove+0x52/0x60 [ 4738.225313] device_del+0x119/0x320 [ 4738.225315] ? kobject_release+0x4c/0x80 [ 4738.225319] scsi_target_reap_ref_release+0x28/0x40 [ 4738.225320] scsi_target_reap+0x29/0x30 [ 4738.225322] scsi_remove_target+0x189/0x1a0 [ 4738.225325] sas_rphy_remove+0x5b/0x70 [ 4738.225328] sas_port_delete+0x28/0x160 [ 4738.225331] ? sysfs_remove_link+0x14/0x30 [ 4738.225334] mptsas_del_end_device+0x16c/0x1a0 [mptsas] [ 4738.225336] mptsas_expander_delete+0x129/0x310 [mptsas] [ 4738.225338] mptsas_firmware_event_work+0x69f/0xcda [mptsas] [ 4738.225340] ? mptsas_firmware_event_work+0x69f/0xcda [mptsas] [ 4738.225346] ? pick_next_task_fair+0x455/0x4f0 [ 4738.225347] ? pick_next_task_fair+0x455/0x4f0 [ 4738.225354] process_one_work+0x13a/0x350 [ 4738.225355] ? process_one_work+0x13a/0x350 [ 4738.225356] worker_thread+0x46/0x470 [ 4738.225359] kthread+0xfe/0x140 [ 4738.225361] ? max_active_store+0x60/0x60 [ 4738.225362] ? kthread_park+0x90/0x90 [ 4738.225369] ret_from_fork+0x29/0x40 [ 4738.225371] ---[ end trace 484be07bfa4dae74 ]--- [ 4738.226080] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0 [ 4738.226163] IP: sas_rphy_match+0x4b/0x80[ 4738.226178] PGD 0
[ 4738.226192] Oops: 0000 [#1] SMP [ 4738.226210] Modules linked in: iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi serpent_sse2_x86_64 serpent_generic ablk_helper algif_skcipher af_alg vmnet(O) vmblock(O) vmmon(O) vmw_vsock_vmci_transport vsock vmw_vmci nfsd rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs lockd grace sunrpc bonding cachefiles fscache binfmt_misc usb_storage ipmi_ssif pl2303 amdgpu usbserial snd_oxygen dcdbas i2c_algo_bit snd_oxygen_lib drm_kms_helper snd_hda_codec_hdmi coretemp snd_mpu401_uart cfbfillrect syscopyarea snd_rawmidi cfbimgblt sr_mod sysfillrect snd_seq_device sysimgblt cdrom snd_hda_intel fb_sys_fops mptsas cfbcopyarea snd_hda_codec ttm snd_hda_core drm snd_hwdep snd_pcm snd_timer snd soundcore i7300_edac bnx2 edac_core mptspi mptscsih ipmi_si mptbase ipmi_devintf xhci_pci ipmi_msghandler xhci_hcd [ 4738.226559] CPU: 0 PID: 19546 Comm: kworker/0:9 Tainted: G W O 4.11.5+ #8 [ 4738.226590] Hardware name: Dell Inc. PowerEdge R900/0TT975, BIOS 1.2.0 11/11/2010 [ 4738.226639] Workqueue: mpt/2 mptsas_firmware_event_work [mptsas] [ 4738.226665] task: ffff883f20ab3580 task.stack: ffffc9000de2c000 [ 4738.226708] RIP: 0010:sas_rphy_match+0x4b/0x80 [ 4738.226725] RSP: 0018:ffffc9000de2fbf0 EFLAGS: 00010246 [ 4738.226757] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000001810000f1 [ 4738.226806] RDX: ffff883f444db000 RSI: ffff883f21a7a000 RDI: ffff883f21a7f000 [ 4738.226856] RBP: ffffc9000de2fc00 R08: 000000002a4e3001 R09: 00000001810000f1 [ 4738.226907] R10: ffffc9000de2fb28 R11: ffff883f3d593580 R12: ffff883f4337b700 [ 4738.226953] R13: ffffffff814317f0 R14: 5001940000752200 R15: ffff883f21a81800 [ 4738.227001] FS: 0000000000000000(0000) GS:ffff883f5ee00000(0000) knlGS:0000000000000000 [ 4738.227036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4738.227071] CR2: 00000000000000a0 CR3: 0000003f324bb000 CR4: 00000000000006f0 [ 4738.227116] Call Trace: [ 4738.227128] attribute_container_device_trigger+0x38/0xb0 [ 4738.227160] transport_remove_device+0x10/0x20 [ 4738.227178] sas_rphy_remove+0x4b/0x70 [ 4738.227192] sas_port_delete+0x28/0x160 [ 4738.227213] ? sysfs_remove_link+0x14/0x30 [ 4738.227228] mptsas_del_end_device+0x16c/0x1a0 [mptsas] [ 4738.227260] mptsas_expander_delete+0x129/0x310 [mptsas] [ 4738.227282] mptsas_firmware_event_work+0x69f/0xcda [mptsas] [ 4738.227306] ? mptsas_firmware_event_work+0x69f/0xcda [mptsas] [ 4738.227329] ? pick_next_task_fair+0x455/0x4f0 [ 4738.227346] ? pick_next_task_fair+0x455/0x4f0 [ 4738.227364] process_one_work+0x13a/0x350 [ 4738.227383] ? process_one_work+0x13a/0x350 [ 4738.227409] worker_thread+0x46/0x470 [ 4738.227431] kthread+0xfe/0x140 [ 4738.227449] ? max_active_store+0x60/0x60 [ 4738.227470] ? kthread_park+0x90/0x90 [ 4738.227489] ret_from_fork+0x29/0x40[ 4738.227503] Code: 5b 41 5c 5d c3 48 8b 06 49 89 fc 48 8b 18 eb 08 48 8b 1b 48 85 db 74 3a 48 89 df e8 f0 b1 fe ff 85 c0 74 ec 48 81 eb e0 01 00 00 <48> 8b 83 a0 00 00 00 48 85 c0 74 c7 48 81 78 38 c0 ec c6 81 75 [ 4738.227607] RIP: sas_rphy_match+0x4b/0x80 RSP: ffffc9000de2fbf0
[ 4738.227643] CR2: 00000000000000a0 [ 4738.239890] ---[ end trace 484be07bfa4dae75 ]--- Is this is a known / obvious issue, or should I try to bisect it? Please CC replies, I'm not subscribed to linux-scsi.
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