Public bug reported:

I was using my iPhone network sharing over USB-C cable to my ThinkPad
T470 while on the road. Using 4.15.0-10-generic available in Bionic I am
experiencing regular crashes that bring my machine down.

After hard power cycle I can find things like this in my last log:

mar 12 19:59:09 t470 kernel: ------------[ cut here ]------------
mar 12 19:59:09 t470 kernel: Kernel BUG at 0000000065a29ced [verbose debug info 
unavailable]
mar 12 19:59:09 t470 kernel: WARNING: CPU: 2 PID: 22 at 
/build/linux-LuqUgo/linux-4.15.0/net/core/dev.c:4143 net_tx_action+0x17d/0x1e0
mar 12 19:59:09 t470 kernel: Modules linked in: thunderbolt 
scsi_transport_iscsi binfmt_misc veth btrfs zstd_compress xor raid6_pq 
ebtable_filter ebtables ip6t_MASQUERADE nf_nat_masquerade_ipv6
mar 12 19:59:09 t470 kernel:  ac97_bus snd_pcm_dmaengine intel_cstate 
intel_rapl_perf cfg80211 snd_hda_intel snd_hda_codec snd_hda_core input_leds 
snd_hwdep joydev serio_raw wmi_bmof intel_wmi_
mar 12 19:59:09 t470 kernel:  e1000e cryptd sysimgblt fb_sys_fops ahci ptp 
pps_core drm libahci psmouse wmi video
mar 12 19:59:09 t470 kernel: CPU: 2 PID: 22 Comm: ksoftirqd/2 Not tainted 
4.15.0-10-generic #11-Ubuntu
mar 12 19:59:09 t470 kernel: Hardware name: LENOVO 20JNS04U2L/20JNS04U2L, BIOS 
N1QET69W (1.44 ) 12/13/2017
mar 12 19:59:09 t470 kernel: RIP: 0010:net_tx_action+0x17d/0x1e0
mar 12 19:59:09 t470 kernel: RSP: 0018:ffffb615819c3e30 EFLAGS: 00010286
mar 12 19:59:09 t470 kernel: RAX: 00000000c0000000 RBX: ffff93166975ce00 RCX: 
ffffffffb8e05110
mar 12 19:59:09 t470 kernel: RDX: 00000001001329d5 RSI: 0000000000000081 RDI: 
ffffffffb8e05110
mar 12 19:59:09 t470 kernel: RBP: ffffb615819c3e58 R08: ffffb615819c3de0 R09: 
0000000000000100
mar 12 19:59:09 t470 kernel: R10: 0000000000000000 R11: 00000000000001b9 R12: 
0000000000000001
mar 12 19:59:09 t470 kernel: R13: ffff9316de5238c0 R14: 0000000000000000 R15: 
ffffffffb82497a0
mar 12 19:59:09 t470 kernel: FS:  0000000000000000(0000) 
GS:ffff9316de500000(0000) knlGS:0000000000000000
mar 12 19:59:09 t470 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
mar 12 19:59:09 t470 kernel: CR2: 000027b10394c548 CR3: 00000001dd60a006 CR4: 
00000000003626e0
mar 12 19:59:09 t470 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
mar 12 19:59:09 t470 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 
0000000000000400
mar 12 19:59:09 t470 kernel: Call Trace:
mar 12 19:59:09 t470 kernel:  __do_softirq+0xdf/0x2b2
mar 12 19:59:09 t470 kernel:  run_ksoftirqd+0x29/0x60
mar 12 19:59:09 t470 kernel:  smpboot_thread_fn+0xfc/0x170
mar 12 19:59:09 t470 kernel:  kthread+0x121/0x140
mar 12 19:59:09 t470 kernel:  ? sort_range+0x30/0x30
mar 12 19:59:09 t470 kernel:  ? kthread_create_worker_on_cpu+0x70/0x70
mar 12 19:59:09 t470 kernel:  ret_from_fork+0x35/0x40
mar 12 19:59:09 t470 kernel: Code: 24 48 85 c0 75 e6 f6 83 8e 00 00 00 0c 48 89 
df 0f 85 17 ff ff ff e8 53 1a ff ff e9 12 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 
5d c3 <0f> ff 8b 43 28 85 c0 0f 84 
mar 12 19:59:09 t470 kernel: ---[ end trace d620ba79a43b3ee6 ]---

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-10-generic 4.15.0-10.11
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  zyga       3723 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 12 20:19:32 2018
HibernationDevice: RESUME=UUID=e7d91d8d-48d8-4040-9f0e-e9424d8225c8
InstallationDate: Installed on 2018-02-25 (15 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180214)
Lsusb:
 Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. 
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 5986:111c Acer, Inc 
 Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20JNS04U2L
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pl_PL.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-10-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-10-generic N/A
 linux-backports-modules-4.15.0-10-generic  N/A
 linux-firmware                             1.172
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/13/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: N1QET69W (1.44 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20JNS04U2L
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: 
dmi:bvnLENOVO:bvrN1QET69W(1.44):bd12/13/2017:svnLENOVO:pn20JNS04U2L:pvrThinkPadT470W10DG:rvnLENOVO:rn20JNS04U2L:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T470 W10DG
dmi.product.name: 20JNS04U2L
dmi.product.version: ThinkPad T470 W10DG
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug bionic wayland-session

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https://bugs.launchpad.net/bugs/1755270

Title:
  Linux crashes when using network sharing over usb-c to iPhone 6s

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I was using my iPhone network sharing over USB-C cable to my ThinkPad
  T470 while on the road. Using 4.15.0-10-generic available in Bionic I
  am experiencing regular crashes that bring my machine down.

  After hard power cycle I can find things like this in my last log:

  mar 12 19:59:09 t470 kernel: ------------[ cut here ]------------
  mar 12 19:59:09 t470 kernel: Kernel BUG at 0000000065a29ced [verbose debug 
info unavailable]
  mar 12 19:59:09 t470 kernel: WARNING: CPU: 2 PID: 22 at 
/build/linux-LuqUgo/linux-4.15.0/net/core/dev.c:4143 net_tx_action+0x17d/0x1e0
  mar 12 19:59:09 t470 kernel: Modules linked in: thunderbolt 
scsi_transport_iscsi binfmt_misc veth btrfs zstd_compress xor raid6_pq 
ebtable_filter ebtables ip6t_MASQUERADE nf_nat_masquerade_ipv6
  mar 12 19:59:09 t470 kernel:  ac97_bus snd_pcm_dmaengine intel_cstate 
intel_rapl_perf cfg80211 snd_hda_intel snd_hda_codec snd_hda_core input_leds 
snd_hwdep joydev serio_raw wmi_bmof intel_wmi_
  mar 12 19:59:09 t470 kernel:  e1000e cryptd sysimgblt fb_sys_fops ahci ptp 
pps_core drm libahci psmouse wmi video
  mar 12 19:59:09 t470 kernel: CPU: 2 PID: 22 Comm: ksoftirqd/2 Not tainted 
4.15.0-10-generic #11-Ubuntu
  mar 12 19:59:09 t470 kernel: Hardware name: LENOVO 20JNS04U2L/20JNS04U2L, 
BIOS N1QET69W (1.44 ) 12/13/2017
  mar 12 19:59:09 t470 kernel: RIP: 0010:net_tx_action+0x17d/0x1e0
  mar 12 19:59:09 t470 kernel: RSP: 0018:ffffb615819c3e30 EFLAGS: 00010286
  mar 12 19:59:09 t470 kernel: RAX: 00000000c0000000 RBX: ffff93166975ce00 RCX: 
ffffffffb8e05110
  mar 12 19:59:09 t470 kernel: RDX: 00000001001329d5 RSI: 0000000000000081 RDI: 
ffffffffb8e05110
  mar 12 19:59:09 t470 kernel: RBP: ffffb615819c3e58 R08: ffffb615819c3de0 R09: 
0000000000000100
  mar 12 19:59:09 t470 kernel: R10: 0000000000000000 R11: 00000000000001b9 R12: 
0000000000000001
  mar 12 19:59:09 t470 kernel: R13: ffff9316de5238c0 R14: 0000000000000000 R15: 
ffffffffb82497a0
  mar 12 19:59:09 t470 kernel: FS:  0000000000000000(0000) 
GS:ffff9316de500000(0000) knlGS:0000000000000000
  mar 12 19:59:09 t470 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  mar 12 19:59:09 t470 kernel: CR2: 000027b10394c548 CR3: 00000001dd60a006 CR4: 
00000000003626e0
  mar 12 19:59:09 t470 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
  mar 12 19:59:09 t470 kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 
0000000000000400
  mar 12 19:59:09 t470 kernel: Call Trace:
  mar 12 19:59:09 t470 kernel:  __do_softirq+0xdf/0x2b2
  mar 12 19:59:09 t470 kernel:  run_ksoftirqd+0x29/0x60
  mar 12 19:59:09 t470 kernel:  smpboot_thread_fn+0xfc/0x170
  mar 12 19:59:09 t470 kernel:  kthread+0x121/0x140
  mar 12 19:59:09 t470 kernel:  ? sort_range+0x30/0x30
  mar 12 19:59:09 t470 kernel:  ? kthread_create_worker_on_cpu+0x70/0x70
  mar 12 19:59:09 t470 kernel:  ret_from_fork+0x35/0x40
  mar 12 19:59:09 t470 kernel: Code: 24 48 85 c0 75 e6 f6 83 8e 00 00 00 0c 48 
89 df 0f 85 17 ff ff ff e8 53 1a ff ff e9 12 ff ff ff 5b 41 5c 41 5d 41 5e 41 
5f 5d c3 <0f> ff 8b 43 28 85 c0 0f 84 
  mar 12 19:59:09 t470 kernel: ---[ end trace d620ba79a43b3ee6 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-10-generic 4.15.0-10.11
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  zyga       3723 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Mar 12 20:19:32 2018
  HibernationDevice: RESUME=UUID=e7d91d8d-48d8-4040-9f0e-e9424d8225c8
  InstallationDate: Installed on 2018-02-25 (15 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180214)
  Lsusb:
   Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. 
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 5986:111c Acer, Inc 
   Bus 001 Device 002: ID 8087:0a2b Intel Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 20JNS04U2L
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-10-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-10-generic N/A
   linux-backports-modules-4.15.0-10-generic  N/A
   linux-firmware                             1.172
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/13/2017
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1QET69W (1.44 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20JNS04U2L
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40697 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN1QET69W(1.44):bd12/13/2017:svnLENOVO:pn20JNS04U2L:pvrThinkPadT470W10DG:rvnLENOVO:rn20JNS04U2L:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.family: ThinkPad T470 W10DG
  dmi.product.name: 20JNS04U2L
  dmi.product.version: ThinkPad T470 W10DG
  dmi.sys.vendor: LENOVO

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