apport information

** Attachment added: "IwConfig.txt"
   
https://bugs.launchpad.net/bugs/1763594/+attachment/5113414/+files/IwConfig.txt

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https://bugs.launchpad.net/bugs/1763594

Title:
  xhci hangs; reset results in NULL pointer dereference

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Now and then, my xhci bus will hang, resulting in these kinds of
  messages in dmesg:

  [252220.002102] xhci_hcd 0000:00:14.0: xHC is not running.
  [252220.037491] xhci_hcd 0000:00:14.0: xHCI host controller not responding, 
assume dead
  [252220.037500] xhci_hcd 0000:00:14.0: HC died; cleaning up
  [252220.133794] usb 1-2: USB disconnect, device number 2
  [252220.135042] usb 1-7: USB disconnect, device number 3
  [252220.137455] usb 1-8: USB disconnect, device number 4
  [252220.243317] usb 1-9: USB disconnect, device number 5

  Usually, I can fix this bij resetting the bus by calling a script
  reset-xhci:

  for xhci in /sys/bus/pci/drivers/?hci_hcd ; do
    cd $xhci
    echo Resetting devices from $xhci...
    for i in ????:??:??.? ; do
      echo -n "$i" > unbind
      echo -n "$i" > bind
    done
  done

  But doing this today resulted in a kernel bug:

  [252243.401814] xhci_hcd 0000:00:14.0: remove, state 4
  [252243.401887] usb usb2: USB disconnect, device number 1
  [252243.470365] xhci_hcd 0000:00:14.0: USB bus 2 deregistered
  [252243.470378] xhci_hcd 0000:00:14.0: remove, state 4
  [252243.470383] usb usb1: USB disconnect, device number 1
  [252243.470831] xhci_hcd 0000:00:14.0: Host halt failed, -19
  [252243.470837] xhci_hcd 0000:00:14.0: Host not accessible, reset failed.
  [252243.475918] xhci_hcd 0000:00:14.0: USB bus 1 deregistered
  [252243.475938] ------------[ cut here ]------------
  [252243.475939] xhci_hcd 0000:00:14.0: disabling already-disabled device
  [252243.475951] WARNING: CPU: 2 PID: 1787 at 
/build/linux-bdpCf2/linux-4.15.0/drivers/pci/pci.c:1642 
pci_disable_device+0x9c/0xc0
  [252243.475951] Modules linked in: cpuid snd_seq_dummy usb_storage 
hid_generic hidp ip6t_REJECT nf_reject_ipv6 ip6table_nat nf_nat_ipv6 
ip6table_mangle xt_hashlimit ip6table_raw nf_conntrack_ipv6 nf_defrag_ipv6 
nf_log_ipv6 xt_recent xt_comment ipt_REJECT nf_reject_ipv4 xt_mark 
iptable_mangle xt_tcpudp xt_CT iptable_raw xt_multiport xt_NFLOG nfnetlink_log 
nf_log_ipv4 nf_log_common xt_LOG nf_conntrack_sane nf_conntrack_netlink 
nfnetlink nf_nat_tftp nf_nat_snmp_basic nf_conntrack_snmp nf_nat_sip 
nf_nat_pptp nf_nat_proto_gre nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat_amanda 
nf_conntrack_tftp nf_conntrack_sip nf_conntrack_pptp nf_conntrack_proto_gre 
nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_irc 
nf_conntrack_h323 nf_conntrack_ftp ts_kmp nf_conntrack_amanda ipt_MASQUERADE 
nf_nat_masquerade_ipv4
  [252243.475984]  xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 
nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype xt_conntrack nf_nat nf_conntrack 
br_netfilter aufs vhost_net vhost tap ccm rfcomm bridge stp llc devlink 
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter msr cmac bnep 
binfmt_misc snd_hda_codec_hdmi nls_iso8859_1 arc4 snd_soc_skl 
snd_hda_codec_realtek snd_soc_skl_ipc snd_hda_ext_core snd_hda_codec_generic 
snd_soc_sst_dsp snd_soc_sst_ipc snd_soc_acpi snd_soc_core snd_compress ac97_bus 
snd_pcm_dmaengine snd_hda_intel dell_laptop dell_smbios_smm dcdbas 
snd_hda_codec dell_smm_hwmon snd_hda_core snd_hwdep snd_pcm intel_rapl 
snd_seq_midi snd_seq_midi_event x86_pkg_temp_thermal intel_powerclamp coretemp 
snd_rawmidi kvm_intel kvm btusb irqbypass intel_cstate intel_rapl_perf snd_seq 
btrtl
  [252243.476023]  iwlmvm btbcm btintel mac80211 hid_multitouch uvcvideo joydev 
input_leds dell_smbios_wmi snd_seq_device dell_wmi bluetooth serio_raw 
snd_timer videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 dell_smbios 
videobuf2_core iwlwifi sparse_keymap ecdh_generic snd wmi_bmof 
dell_wmi_descriptor videodev cfg80211 media soundcore rtsx_pci_ms memstick 
shpchp mei_me mei processor_thermal_device intel_pch_thermal intel_soc_dts_iosf 
int3400_thermal acpi_thermal_rel dell_rbtn mac_hid acpi_pad int3403_thermal 
int340x_thermal_zone tpm_crb sch_fq_codel cuse parport_pc ppdev nfsd lp parport 
auth_rpcgss nfs_acl lockd grace sunrpc ip_tables x_tables autofs4 btrfs 
zstd_compress algif_skcipher af_alg dm_crypt raid10 raid456 async_raid6_recov 
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1
  [252243.476067]  raid0 multipath linear dm_mirror dm_region_hash dm_log 
usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc i915 
rtsx_pci_sdmmc i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect 
sysimgblt fb_sys_fops ptp aesni_intel psmouse drm pps_core rtsx_pci aes_x86_64 
ahci crypto_simd glue_helper libahci wmi cryptd video
  [252243.476089] CPU: 2 PID: 1787 Comm: reset-xhci Tainted: G     U  W        
4.15.0-13-generic #14-Ubuntu
  [252243.476090] Hardware name: Dell Inc. Latitude E7470/0T6HHJ, BIOS 1.18.5 
12/11/2017
  [252243.476092] RIP: 0010:pci_disable_device+0x9c/0xc0
  [252243.476092] RSP: 0018:ffffa61206edfd40 EFLAGS: 00010286
  [252243.476094] RAX: 0000000000000000 RBX: ffff9356fcc25000 RCX: 
ffffffffa9862888
  [252243.476095] RDX: 0000000000000001 RSI: 0000000000000082 RDI: 
0000000000000247
  [252243.476096] RBP: ffffa61206edfd50 R08: 0000000000000038 R09: 
000000000000c694
  [252243.476097] R10: ffffa61206edfcf0 R11: 0000000000000000 R12: 
ffff9356fced8700
  [252243.476098] R13: ffffffffa99d52c0 R14: ffffffffa99d5330 R15: 
0000000000000060
  [252243.476100] FS:  00007f13a7aea740(0000) GS:ffff93570fd00000(0000) 
knlGS:0000000000000000
  [252243.476102] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [252243.476102] CR2: 000055f5dcf9cef0 CR3: 000000011db38006 CR4: 
00000000003626e0
  [252243.476103] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
  [252243.476104] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 
0000000000000400
  [252243.476105] Call Trace:
  [252243.476110]  usb_hcd_pci_remove+0xcf/0x130
  [252243.476112]  xhci_pci_remove+0x6b/0x70
  [252243.476116]  pci_device_remove+0x3e/0xb0
  [252243.476124]  device_release_driver_internal+0x15b/0x220
  [252243.476126]  device_release_driver+0x12/0x20
  [252243.476127]  unbind_store+0x87/0x150
  [252243.476130]  drv_attr_store+0x27/0x40
  [252243.476132]  sysfs_kf_write+0x3c/0x50
  [252243.476135]  kernfs_fop_write+0x125/0x1a0
  [252243.476138]  __vfs_write+0x1b/0x40
  [252243.476140]  vfs_write+0xb1/0x1a0
  [252243.476142]  SyS_write+0x55/0xc0
  [252243.476145]  do_syscall_64+0x73/0x130
  [252243.476148]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
  [252243.476150] RIP: 0033:0x7f13a71f0154
  [252243.476151] RSP: 002b:00007fff8cf40498 EFLAGS: 00000246 ORIG_RAX: 
0000000000000001
  [252243.476153] RAX: ffffffffffffffda RBX: 000000000000000c RCX: 
00007f13a71f0154
  [252243.476154] RDX: 000000000000000c RSI: 000055ef072cc230 RDI: 
0000000000000001
  [252243.476155] RBP: 000055ef072cc230 R08: 00007f13a74cd8c0 R09: 
00007f13a7aea740
  [252243.476156] R10: 00000000fffffff4 R11: 0000000000000246 R12: 
00007f13a74cc760
  [252243.476157] R13: 000000000000000c R14: 00007f13a74c82a0 R15: 
00007f13a74c7760
  [252243.476158] Code: 00 c6 05 5a 6f 12 01 01 4d 85 e4 74 36 48 8d bb a0 00 
00 00 e8 26 55 15 00 4c 89 e2 48 89 c6 48 c7 c7 28 90 51 a9 e8 e4 11 ba ff <0f> 
0b eb 82 48 89 df e8 d8 fe ff ff 80 a3 c1 07 00 00 f7 5b 41
  [252243.476192] ---[ end trace abf3a4d94dd3a5a8 ]---
  [252243.513857] BUG: unable to handle kernel NULL pointer dereference at 
0000000000000128
  [252243.513866] IP: check_root_hub_suspended+0x10/0x60
  [252243.513868] PGD 0 P4D 0
  [252243.513872] Oops: 0000 [#1] SMP PTI
  [252243.513876] Modules linked in: cpuid snd_seq_dummy usb_storage 
hid_generic hidp ip6t_REJECT nf_reject_ipv6 ip6table_nat nf_nat_ipv6 
ip6table_mangle xt_hashlimit ip6table_raw nf_conntrack_ipv6 nf_defrag_ipv6 
nf_log_ipv6 xt_recent xt_comment ipt_REJECT nf_reject_ipv4 xt_mark 
iptable_mangle xt_tcpudp xt_CT iptable_raw xt_multiport xt_NFLOG nfnetlink_log 
nf_log_ipv4 nf_log_common xt_LOG nf_conntrack_sane nf_conntrack_netlink 
nfnetlink nf_nat_tftp nf_nat_snmp_basic nf_conntrack_snmp nf_nat_sip 
nf_nat_pptp nf_nat_proto_gre nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat_amanda 
nf_conntrack_tftp nf_conntrack_sip nf_conntrack_pptp nf_conntrack_proto_gre 
nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_irc 
nf_conntrack_h323 nf_conntrack_ftp ts_kmp nf_conntrack_amanda ipt_MASQUERADE 
nf_nat_masquerade_ipv4
  [252243.513913]  xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 
nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype xt_conntrack nf_nat nf_conntrack 
br_netfilter aufs vhost_net vhost tap ccm rfcomm bridge stp llc devlink 
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter msr cmac bnep 
binfmt_misc snd_hda_codec_hdmi nls_iso8859_1 arc4 snd_soc_skl 
snd_hda_codec_realtek snd_soc_skl_ipc snd_hda_ext_core snd_hda_codec_generic 
snd_soc_sst_dsp snd_soc_sst_ipc snd_soc_acpi snd_soc_core snd_compress ac97_bus 
snd_pcm_dmaengine snd_hda_intel dell_laptop dell_smbios_smm dcdbas 
snd_hda_codec dell_smm_hwmon snd_hda_core snd_hwdep snd_pcm intel_rapl 
snd_seq_midi snd_seq_midi_event x86_pkg_temp_thermal intel_powerclamp coretemp 
snd_rawmidi kvm_intel kvm btusb irqbypass intel_cstate intel_rapl_perf snd_seq 
btrtl
  [252243.513954]  iwlmvm btbcm btintel mac80211 hid_multitouch uvcvideo joydev 
input_leds dell_smbios_wmi snd_seq_device dell_wmi bluetooth serio_raw 
snd_timer videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 dell_smbios 
videobuf2_core iwlwifi sparse_keymap ecdh_generic snd wmi_bmof 
dell_wmi_descriptor videodev cfg80211 media soundcore rtsx_pci_ms memstick 
shpchp mei_me mei processor_thermal_device intel_pch_thermal intel_soc_dts_iosf 
int3400_thermal acpi_thermal_rel dell_rbtn mac_hid acpi_pad int3403_thermal 
int340x_thermal_zone tpm_crb sch_fq_codel cuse parport_pc ppdev nfsd lp parport 
auth_rpcgss nfs_acl lockd grace sunrpc ip_tables x_tables autofs4 btrfs 
zstd_compress algif_skcipher af_alg dm_crypt raid10 raid456 async_raid6_recov 
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1
  [252243.513989]  raid0 multipath linear dm_mirror dm_region_hash dm_log 
usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc i915 
rtsx_pci_sdmmc i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect 
sysimgblt fb_sys_fops ptp aesni_intel psmouse drm pps_core rtsx_pci aes_x86_64 
ahci crypto_simd glue_helper libahci wmi cryptd video
  [252243.514007] CPU: 2 PID: 31613 Comm: kworker/2:1 Tainted: G     U  W       
 4.15.0-13-generic #14-Ubuntu
  [252243.514008] Hardware name: Dell Inc. Latitude E7470/0T6HHJ, BIOS 1.18.5 
12/11/2017
  [252243.514012] Workqueue: pm pm_runtime_work
  [252243.514014] RIP: 0010:check_root_hub_suspended+0x10/0x60
  [252243.514016] RSP: 0018:ffffa61207057cb0 EFLAGS: 00010286
  [252243.514017] RAX: 0000000000000000 RBX: ffff9356fcc250a0 RCX: 
0000000000000000
  [252243.514019] RDX: ffffffffa99d52c0 RSI: 0000000000000001 RDI: 
ffff9356fcc250a0
  [252243.514020] RBP: ffffa61207057cb0 R08: 0000000000000000 R09: 
ffffa61207057db8
  [252243.514021] R10: 0000000000000000 R11: 0000000000000274 R12: 
0000000000000001
  [252243.514022] R13: ffffffffa92ec040 R14: 0000000000000000 R15: 
ffffffffa88ec000
  [252243.514024] FS:  0000000000000000(0000) GS:ffff93570fd00000(0000) 
knlGS:0000000000000000
  [252243.514025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [252243.514026] CR2: 0000000000000128 CR3: 000000009ac0a003 CR4: 
00000000003626e0
  [252243.514028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
  [252243.514029] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 
0000000000000400
  [252243.514030] Call Trace:
  [252243.514033]  suspend_common+0x22/0x160
  [252243.514035]  hcd_pci_runtime_suspend+0x1b/0x50
  [252243.514038]  pci_pm_runtime_suspend+0x64/0x180
  [252243.514040]  ? pci_pm_runtime_resume+0xa0/0xa0
  [252243.514042]  __rpm_callback+0xca/0x210
  [252243.514045]  ? __switch_to_asm+0x34/0x70
  [252243.514047]  ? __switch_to_asm+0x40/0x70
  [252243.514050]  rpm_callback+0x24/0x80
  [252243.514051]  ? pci_pm_runtime_resume+0xa0/0xa0
  [252243.514053]  rpm_suspend+0x137/0x640
  [252243.514056]  rpm_idle+0x58/0x2a0
  [252243.514058]  pm_runtime_work+0x92/0xa0
  [252243.514061]  process_one_work+0x1de/0x410
  [252243.514062]  worker_thread+0x32/0x410
  [252243.514065]  kthread+0x121/0x140
  [252243.514067]  ? process_one_work+0x410/0x410
  [252243.514069]  ? kthread_create_worker_on_cpu+0x70/0x70
  [252243.514072]  ? do_syscall_64+0x73/0x130
  [252243.514074]  ? SyS_exit_group+0x14/0x20
  [252243.514076]  ret_from_fork+0x35/0x40
  [252243.514077] Code: 48 8d b2 a0 00 00 00 48 81 c7 a0 00 00 00 48 89 e5 e8 
65 a0 f1 ff 5d c3 0f 1f 00 0f 1f 44 00 00 48 8b 87 98 00 00 00 55 48 89 e5 <f6> 
80 28 01 00 00 20 75 2c 48 8b 90 f8 01 00 00 31 c0 48 85 d2
  [252243.514103] RIP: check_root_hub_suspended+0x10/0x60 RSP: ffffa61207057cb0
  [252243.514104] CR2: 0000000000000128
  [252243.514106] ---[ end trace abf3a4d94dd3a5a9 ]---
  [252243.533589] xhci_hcd 0000:00:14.0: xHCI Host Controller
  [252243.533600] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus 
number 1
  [252243.534713] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 
0x100 quirks 0x00109810
  [252243.534721] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
  [252243.534892] usb usb1: runtime PM trying to activate child device usb1 but 
parent (0000:00:14.0) is not active

  
  This is a plain linux-image-extra-4.15.0-13-generic kernel on Ubuntu 18.04 
running on a Dell Latitude E7470.

  For completeness sake:

  ╰─▶ lsb_release -rd
  Description:  Ubuntu Bionic Beaver (development branch)
  Release:      18.04

  ╰─▶ uname -a              
  Linux regan 4.15.0-13-generic #14-Ubuntu SMP Sat Mar 17 13:44:27 UTC 2018 
x86_64 x86_64 x86_64 GNU/Linux

  ╰─▶ dpkg -l linux-image-\*|cat
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                                Version      Architecture Description
  
+++-===================================-============-============-===============================================================
  ii  linux-image-4.14.0-16-generic       4.14.0-16.19 amd64        Linux 
kernel image for version 4.14.0 on 64 bit x86 SMP
  ii  linux-image-4.15.0-12-generic       4.15.0-12.13 amd64        Linux 
kernel image for version 4.15.0 on 64 bit x86 SMP
  ii  linux-image-4.15.0-13-generic       4.15.0-13.14 amd64        Linux 
kernel image for version 4.15.0 on 64 bit x86 SMP
  ii  linux-image-extra-4.14.0-16-generic 4.14.0-16.19 amd64        Linux 
kernel extra modules for version 4.14.0 on 64 bit x86 SMP
  ii  linux-image-extra-4.15.0-12-generic 4.15.0-12.13 amd64        Linux 
kernel extra modules for version 4.15.0 on 64 bit x86 SMP
  ii  linux-image-extra-4.15.0-13-generic 4.15.0-13.14 amd64        Linux 
kernel extra modules for version 4.15.0 on 64 bit x86 SMP
  ii  linux-image-generic                 4.15.0.13.14 amd64        Generic 
Linux kernel image

  ╰─▶ cat /proc/version_signature              
  Ubuntu 4.15.0-13.14-generic 4.15.10

  ╰─▶ cat /proc/cmdline 
  BOOT_IMAGE=/vmlinuz-4.15.0-13-generic root=/dev/mapper/regan-root ro nosplash 
acpi_backlight=vendor intel_iommu=off
  --- 
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  bas        2245 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 18.04
  HibernationDevice:
   RESUME=UUID=16195e13-9fb3-41b2-9671-fb4e1df1ff93
   #RESUME=/dev/dm-2
   #RESUME=/dev/mapper/regan-swap
  InstallationDate: Installed on 2016-12-22 (476 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  MachineType: Dell Inc. Latitude E7470
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-13-generic 
root=/dev/mapper/hostname-root ro nosplash acpi_backlight=vendor intel_iommu=off
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-13-generic N/A
   linux-backports-modules-4.15.0-13-generic  N/A
   linux-firmware                             1.173
  Tags:  bionic apport-hook-error
  Uname: Linux 4.15.0-13-generic x86_64
  UnreportableReason: This report is about a package that is not installed.
  UpgradeStatus: Upgraded to bionic on 2017-09-18 (206 days ago)
  UserGroups: adm cdrom dialout dip docker libvirt lp lpadmin lxd plugdev 
sambashare scanner src sudo tss wireshark
  _MarkForUpload: False
  dmi.bios.date: 12/11/2017
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.18.5
  dmi.board.name: 0T6HHJ
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.18.5:bd12/11/2017:svnDellInc.:pnLatitudeE7470:pvr:rvnDellInc.:rn0T6HHJ:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.family: Latitude
  dmi.product.name: Latitude E7470
  dmi.sys.vendor: Dell Inc.

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