* [Bug 205841] Lenovo USB-C dock audio NULL pointer
2019-12-12 7:19 [Bug 205841] New: Lenovo USB-C dock audio NULL pointer bugzilla-daemon
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--- Comment #1 from Ilia Pavlikhin (owl@ow1.in) ---
Created attachment 286259
--> https://bugzilla.kernel.org/attachment.cgi?id=286259&action=edit
Current kernel configuration
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--- Comment #2 from Ilia Pavlikhin (owl@ow1.in) ---
Also I booted to old kernel (5.0.21) and sound works perfectly, but problem
with bandwidth is saved.
[ 4.781746] usb 1-2.4.2.3: new full-speed USB device number 10 using
xhci_hcd
[ 5.036633] usb 1-2.4.2.3: New USB device found, idVendor=17ef,
idProduct=3063, bcdDevice= 9.02
[ 5.036634] usb 1-2.4.2.3: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 5.036634] usb 1-2.4.2.3: Product: ThinkPad USB-C Dock Audio
[ 5.036635] usb 1-2.4.2.3: Manufacturer: Lenovo
[ 5.036636] usb 1-2.4.2.3: SerialNumber: 000000000000
[ 5.105120] input: Lenovo ThinkPad USB-C Dock Audio as
/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.4/1-2.4.2/1-2.4.2.3/1-2.4.2.3:1.3/0003:17EF:3063.0008/input/input14
[ 23.706681] usb 1-2.4.2.3: Not enough bandwidth for new device state.
[ 23.706696] usb 1-2.4.2.3: Not enough bandwidth for altsetting 1
[ 23.706699] usb 1-2.4.2.3: 2:1: usb_set_interface failed (-28)
[ 23.707166] usb 1-2.4.2.3: Not enough bandwidth for new device state.
[ 23.707184] usb 1-2.4.2.3: Not enough bandwidth for altsetting 1
[ 23.707187] usb 1-2.4.2.3: 2:1: usb_set_interface failed (-28)
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--- Comment #3 from Ilia Pavlikhin (owl@ow1.in) ---
Created attachment 286261
--> https://bugzilla.kernel.org/attachment.cgi?id=286261&action=edit
Full dmesg 5.0.21
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Heikki Krogerus (heikki.krogerus@linux.intel.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |heikki.krogerus@linux.intel
| |.com
--- Comment #4 from Heikki Krogerus (heikki.krogerus@linux.intel.com) ---
The NULL pointer is coming from UCSI driver, and it should not have any effect
on audio. UCSI is a firmware interface that we use just for reading the status
of the USB Type-C connectors. The firmware does all the actual negotiation with
the partner device, so the Dock in this case. Which dock is it?
I'll see if I can reproduce the NULL pointer dereference, but you can just
disable the UCSI drivers in your kernel configuration to get rid of it. Any
issues with the audio should not be related to it.
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--- Comment #5 from Ilia Pavlikhin (owl@ow1.in) ---
I use Lenovo Thinkpad USB-C Dock like this
https://support.lenovo.com/lv/en/accessories/acc100348 but not quite.
I have complex audio setup: alsa puts sound to pulseaudio, pa to jack and jack
puts audio to alsa and to physical output. When I boot to 5.4.2 - jack working
unstable - I'll try research this.
Also I'll try disable UCSI and return with results.
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--- Comment #6 from Ilia Pavlikhin (owl@ow1.in) ---
Kernel was rebuilded without UCSI and NULL pointer is gone.
Also sounds seems working, no stucks, no artifacts, jack working fine.
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--- Comment #7 from Ilia Pavlikhin (owl@ow1.in) ---
Created attachment 286263
--> https://bugzilla.kernel.org/attachment.cgi?id=286263&action=edit
Full dmesg 5.4.2 wo UCSI
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--- Comment #8 from Ilia Pavlikhin (owl@ow1.in) ---
Hello, I was trying your patch with -rc1 kernel, but null pointer still exists.
Any news?
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--- Comment #9 from Ilia Pavlikhin (owl@ow1.in) ---
Created attachment 286481
--> https://bugzilla.kernel.org/attachment.cgi?id=286481&action=edit
First pach for testing
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Serg Podtynnyi (serg@podtynnyi.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |serg@podtynnyi.com
--- Comment #10 from Serg Podtynnyi (serg@podtynnyi.com) ---
The same on 5.6.4 on Dell XPS 7390 2 in 1 while connecting D6000 USB-c dock
station
```
[ 8101.565555] WARNING: CPU: 0 PID: 11422 at kernel/module.c:1158
module_put.part.0+0xc9/0xd0
[ 8101.565560] Modules linked in: rfcomm bnep xt_nat veth nf_conntrack_netlink
xt_addrtype joydev hid_multitouch btusb btrtl btbcm btintel bluetooth
xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT ip6table_mangle ip6table_nat
iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
nf_tables ip6table_filter ip6_tables iptable_filter ip_tables bpfilter overlay
algif_aead mei_hdcp des_generic libdes md4 wmi_bmof dell_wmi
intel_wmi_thunderbolt dell_laptop dell_smbios dell_wmi_descriptor
snd_hda_codec_hdmi dcdbas dell_smm_hwmon snd_sof_pci snd_sof_intel_byt
snd_sof_intel_ipc snd_sof_intel_hda_common snd_sof_xtensa_dsp snd_sof
snd_sof_nocodec snd_soc_acpi_intel_match snd_hda_codec_realtek snd_soc_acpi
snd_hda_codec_generic snd_soc_core snd_compress snd_pcm_dmaengine ac97_bus
ledtrig_audio snd_hda_intel psmouse snd_intel_dspcfg typec_displayport
serio_raw snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore
i2c_i801 mei_me hid_sensor_magn_3d hid_sensor_rotation
[ 8101.565601] mei hid_sensor_incl_3d hid_sensor_gyro_3d iwlmvm
hid_sensor_custom hid_sensor_als intel_lpss_pci iwlwifi intel_lpss idma64
cros_ec_ishtp virt_dma cros_ec thunderbolt processor_thermal_device
intel_soc_dts_iosf wmi battery i2c_hid int3403_thermal int340x_thermal_zone
soc_button_array intel_hid intel_pmc_core sparse_keymap int3400_thermal ac
acpi_thermal_rel pkcs8_key_parser atkbd libps2 i8042
[ 8101.565621] CPU: 0 PID: 11422 Comm: kworker/0:2 Tainted: G U W
5.6.4-7937.native #1
[ 8101.565623] Hardware name: Dell Inc. XPS 13 7390 2-in-1/06CDVY, BIOS 1.3.1
03/02/2020
[ 8101.565629] Workqueue: events ucsi_handle_connector_change
[ 8101.565633] RIP: 0010:module_put.part.0+0xc9/0xd0
[ 8101.565636] Code: 24 48 85 c0 75 e3 65 ff 0d ac 15 df 46 75 8c e8 a3 b7 dd
ff eb 85 e8 84 b7 dd ff 5b 31 c0 41 5c 41 5d 5d 89 c2 89 c6 89 c7 c3 <0f> 0b e9
61 ff ff ff 48 85 ff 74 0d 55 48 89 e5 e8 22 ff ff ff 5d
[ 8101.565638] RSP: 0000:ffff96f303d63c78 EFLAGS: 00010297
[ 8101.565640] RAX: 0000000000000000 RBX: ffffffffc05a8140 RCX:
0000000000000000
[ 8101.565641] RDX: 00000000ffffffff RSI: 0000000000000000 RDI:
0000000000000000
[ 8101.565643] RBP: ffff96f303d63c90 R08: 0000000000000000 R09:
0000000000000000
[ 8101.565644] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff928b5ff59008
[ 8101.565645] R13: 0000000000000000 R14: 0000000000000001 R15:
ffff928d69dee2a8
[ 8101.565647] FS: 0000000000000000(0000) GS:ffff928e7f600000(0000)
knlGS:0000000000000000
[ 8101.565649] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 8101.565650] CR2: 00007f5bbb9328a9 CR3: 00000002bfa60003 CR4:
0000000000760ef0
[ 8101.565652] PKRU: 55555554
[ 8101.565653] Call Trace:
[ 8101.565660] module_put+0xe/0x20
[ 8101.565664] typec_altmode_update_active+0x4c/0xf0
[ 8101.565669] typec_remove+0x86/0x90
[ 8101.565674] device_release_driver_internal+0xf3/0x1c0
[ 8101.565677] device_release_driver+0xd/0x20
[ 8101.565680] bus_remove_device+0xdc/0x150
[ 8101.565684] device_del+0x171/0x3f0
[ 8101.565688] device_unregister+0x16/0x60
[ 8101.565690] typec_unregister_altmode+0x2b/0x40
[ 8101.565694] ucsi_unregister_altmodes+0x41/0x90
[ 8101.565697] ucsi_unregister_partner.part.0+0x12/0x30
[ 8101.565700] ucsi_handle_connector_change+0x221/0x311
[ 8101.565705] ? kfree+0x256/0x270
[ 8101.565709] process_one_work+0x19c/0x3a0
[ 8101.565712] worker_thread+0x4b/0x3b0
[ 8101.565716] kthread+0x101/0x140
[ 8101.565718] ? process_one_work+0x3a0/0x3a0
[ 8101.565721] ? kthread_park+0xa0/0xa0
[ 8101.565726] ret_from_fork+0x1f/0x40
[ 8101.565729] ---[ end trace 227b0e97c6c80051 ]---
```
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--- Comment #11 from Heikki Krogerus (heikki.krogerus@linux.intel.com) ---
I should be able to get my hands on one of those Dell D6000 docks. Not sure
about the XPS 13 7390.
I'll see if I'm able to reproduce this one.
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--- Comment #12 from Serg Podtynnyi (serg@podtynnyi.com) ---
In Red Hat https://bugzilla.redhat.com/show_bug.cgi?id=1772806
and retrace https://retrace.fedoraproject.org/faf/reports/2662737/
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Mike (pmike2001@mail.ru) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pmike2001@mail.ru
--- Comment #13 from Mike (pmike2001@mail.ru) ---
Wow, this bug with usb-typec is quite old.
I'm getting crashes in `typec_altmode_update_active` on recent kernel 7.0.2
```
2026-05-05T21:53:56.654401+03:00 113896057i kernel: ------------[ cut here
]------------
2026-05-05T21:53:56.654434+03:00 113896057i kernel: WARNING:
drivers/usb/typec/class.c:311 at typec_altmode_update_active+0x101/0x110
[typec], CPU#4: kworker/u64:32/1052736
2026-05-05T21:53:56.654438+03:00 113896057i kernel: Modules linked in: btusb
cpuid cdc_acm typec_displayport ccm dummy rfcomm snd_seq_dummy snd_hrtimer uhid
cmac algif_hash algif_skcipher af_alg bnep zram 842_decompress 842_compress
lz4hc_compress lz4_compress snd_soc_skl_hda_dsp snd_soc_intel_sof_board_helpers
snd_sof_probes snd_soc_intel_hda_dsp_common snd_hda_codec_intelhdmi
snd_hda_codec_hdmi hid_multitouch snd_soc_dmic snd_hda_codec_alc269
snd_hda_codec_realtek_lib snd_hda_intel snd_hda_scodec_component
snd_hda_codec_generic snd_sof_pci_intel_tgl snd_sof_pci_intel_cnl
snd_sof_intel_hda_generic soundwire_intel snd_sof_intel_hda_sdw_bpt
snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink
snd_sof_intel_hda soundwire_cadence snd_sof_pci snd_sof_xtensa_dsp snd_sof
snd_sof_utils snd_soc_acpi_intel_match snd_ctl_led
snd_soc_acpi_intel_sdca_quirks soundwire_generic_allocation snd_soc_sdw_utils
snd_soc_acpi soundwire_bus snd_soc_sdca crc8 binfmt_misc snd_soc_avs
xt_hashlimit snd_soc_hda_codec xt_conntrack iwlmvm snd_hda_ext_core
nf_conntrack
2026-05-05T21:53:56.654442+03:00 113896057i kernel: snd_hda_codec
nf_defrag_ipv6 snd_hda_core hid_generic intel_rapl_msr spi_nor nf_defrag_ipv4
mei_pxp mei_hdcp mac80211 snd_intel_dspcfg xt_tcpudp mtd nft_compat
snd_intel_sdw_acpi x_tables snd_hwdep processor_thermal_device_pci libarc4
uvcvideo nf_tables snd_soc_core processor_thermal_device intel_uncore_frequency
snd_compress videobuf2_vmalloc intel_uncore_frequency_common
processor_thermal_wt_hint ac97_bus uvc platform_temperature_control
intel_tcc_cooling snd_pcm_dmaengine videobuf2_memops
processor_thermal_soc_slider x86_pkg_temp_thermal videobuf2_v4l2
processor_thermal_rfim intel_powerclamp btmtk snd_pcm videobuf2_common
ucsi_acpi processor_thermal_rapl btrtl typec_ucsi iwlwifi intel_rapl_common
btbcm videodev thinkpad_acpi snd_seq typec coretemp think_lmi btintel
intel_lpss_pci ghash_clmulni_intel processor_thermal_wt_req nls_iso8859_1 rapl
usbhid intel_cstate mc firmware_attributes_class bluetooth wmi_bmof i2c_i801
nvram snd_seq_device processor_thermal_power_floor snd_timer mei_me
spi_intel_pci
2026-05-05T21:53:56.654445+03:00 113896057i kernel: platform_profile
int3403_thermal intel_lpss processor_thermal_mbox cfg80211 snd spi_intel
i2c_smbus i2c_hid_acpi thunderbolt mei idma64 i2c_mux igen6_edac soundcore
mei_vsc_hw i2c_hid int340x_thermal_zone soc_button_array hid intel_pmc_core
pmt_telemetry pmt_discovery intel_hid pmt_class int3400_thermal
intel_pmc_ssram_telemetry acpi_thermal_rel sparse_keymap acpi_pad acpi_tad
sch_fq_codel ntsync efi_pstore nfnetlink dmi_sysfs autofs4 dm_crypt xe
drm_ttm_helper drm_suballoc_helper gpu_sched drm_gpuvm drm_exec
drm_gpusvm_helper i2c_algo_bit drm_buddy ttm nvme drm_display_helper nvme_core
video psmouse cec nvme_keyring mac_hid nvme_auth rc_core hkdf intel_vsec wmi
pinctrl_tigerlake aesni_intel [last unloaded: btusb]
2026-05-05T21:53:56.654447+03:00 113896057i kernel: CPU: 4 UID: 0 PID: 1052736
Comm: kworker/u64:32 Tainted: G U W 7.0.2-070002-generic
#202604271502 PREEMPT(lazy)
2026-05-05T21:53:56.654449+03:00 113896057i kernel: Tainted: [U]=USER, [W]=WARN
2026-05-05T21:53:56.654451+03:00 113896057i kernel: Hardware name: LENOVO
21HNS8JH00/21HNS8JH00, BIOS N3XET42W (1.17 ) 08/02/2023
2026-05-05T21:53:56.654454+03:00 113896057i kernel: Workqueue: USBC000:00-con1
ucsi_poll_worker [typec_ucsi]
2026-05-05T21:53:56.654476+03:00 113896057i kernel: RIP:
0010:typec_altmode_update_active+0x101/0x110 [typec]
2026-05-05T21:53:56.654478+03:00 113896057i kernel: Code: 4d c8 c4 fc 75 2b 48
8b 5d f8 c9 31 c0 31 d2 31 c9 31 f6 31 ff c3 cc cc cc cc e8 da 7b d9 f9 8b 75
e4 84 c0 0f 85 6d ff ff ff <0f> 0b e9 66 ff ff ff e8 13 3e f4 fa 0f 1f 00 90 90
90 90 90 90 90
2026-05-05T21:53:56.654481+03:00 113896057i kernel: RSP: 0018:ffffcd40051ffd80
EFLAGS: 00010246
2026-05-05T21:53:56.654483+03:00 113896057i kernel: RAX: 0000000000000000 RBX:
ffff8bf663d8ac08 RCX: 0000000000000000
2026-05-05T21:53:56.654571+03:00 113896057i kernel: RDX: 0000000000000000 RSI:
0000000000000001 RDI: 0000000000000000
2026-05-05T21:53:56.654581+03:00 113896057i kernel: RBP: ffffcd40051ffda0 R08:
0000000000000000 R09: 0000000000000000
2026-05-05T21:53:56.654582+03:00 113896057i kernel: R10: 0000000000000000 R11:
0000000000000000 R12: ffff8bf6123c0000
2026-05-05T21:53:56.654583+03:00 113896057i kernel: R13: ffff8bf663d8ac08 R14:
0000000000000000 R15: ffff8bf7522ebd40
2026-05-05T21:53:56.654584+03:00 113896057i kernel: FS: 0000000000000000(0000)
GS:ffff8bf992004000(0000) knlGS:0000000000000000
2026-05-05T21:53:56.654590+03:00 113896057i kernel: CS: 0010 DS: 0000 ES: 0000
CR0: 0000000080050033
2026-05-05T21:53:56.654592+03:00 113896057i kernel: CR2: 000055eabf2a8178 CR3:
000000011a4ec001 CR4: 0000000000f70ef0
2026-05-05T21:53:56.654592+03:00 113896057i kernel: PKRU: 55555554
2026-05-05T21:53:56.654594+03:00 113896057i kernel: Call Trace:
2026-05-05T21:53:56.654599+03:00 113896057i kernel: <TASK>
2026-05-05T21:53:56.654610+03:00 113896057i kernel:
ucsi_altmode_update_active+0x116/0x1b0 [typec_ucsi]
2026-05-05T21:53:56.654614+03:00 113896057i kernel:
ucsi_check_altmodes+0x82/0xc0 [typec_ucsi]
2026-05-05T21:53:56.654615+03:00 113896057i kernel: ? mutex_lock+0x3b/0x50
2026-05-05T21:53:56.654616+03:00 113896057i kernel:
ucsi_poll_worker+0x3d/0x130 [typec_ucsi]
2026-05-05T21:53:56.654617+03:00 113896057i kernel:
process_one_work+0x1ac/0x3d0
2026-05-05T21:53:56.654618+03:00 113896057i kernel: worker_thread+0x1b8/0x360
2026-05-05T21:53:56.654618+03:00 113896057i kernel: ?
_raw_spin_lock_irqsave+0xe/0x20
2026-05-05T21:53:56.654619+03:00 113896057i kernel: ?
__pfx_worker_thread+0x10/0x10
2026-05-05T21:53:56.654624+03:00 113896057i kernel: kthread+0xf7/0x130
2026-05-05T21:53:56.654625+03:00 113896057i kernel: ? __pfx_kthread+0x10/0x10
2026-05-05T21:53:56.654626+03:00 113896057i kernel: ret_from_fork+0x195/0x2a0
2026-05-05T21:53:56.654627+03:00 113896057i kernel: ? __pfx_kthread+0x10/0x10
2026-05-05T21:53:56.654627+03:00 113896057i kernel: ? __pfx_kthread+0x10/0x10
2026-05-05T21:53:56.654632+03:00 113896057i kernel:
ret_from_fork_asm+0x1a/0x30
2026-05-05T21:53:56.654639+03:00 113896057i kernel: </TASK>
2026-05-05T21:53:56.654640+03:00 113896057i kernel: ---[ end trace
0000000000000000 ]---
```
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^ permalink raw reply [flat|nested] 15+ messages in thread* [Bug 205841] Lenovo USB-C dock audio NULL pointer
2019-12-12 7:19 [Bug 205841] New: Lenovo USB-C dock audio NULL pointer bugzilla-daemon
` (12 preceding siblings ...)
2026-05-05 19:01 ` bugzilla-daemon
@ 2026-05-06 9:33 ` bugzilla-daemon
13 siblings, 0 replies; 15+ messages in thread
From: bugzilla-daemon @ 2026-05-06 9:33 UTC (permalink / raw)
To: linux-usb
https://bugzilla.kernel.org/show_bug.cgi?id=205841
--- Comment #14 from Heikki Krogerus (heikki.krogerus@linux.intel.com) ---
The original NULL pointer dereference was fixed a long long time ago with
commit b0fcdffdd626 ("usb: typec: Prepare alt mode enter/exit reporting for
UCSI alt mode support"). Unfortunately I can not close this bug.
What you are seeing something else, so please create a new report for that.
This one really should be closed already.
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^ permalink raw reply [flat|nested] 15+ messages in thread