Public bug reported:
Since the release upgrade 22.04 to 24.04.1, I have a bunch a problems; starting
with the kernel at boot, later on with udev.
Here is the dmesg for the usual cold start:
```
9.487625] Console: switching to colour frame buffer device 160x45
[ 9.551017] intel-vbtn INT33D6:00: Registering Intel Virtual Switches
input-dev after receiving a switch event
[ 9.551112] input: Intel Virtual Switches as
/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/INT33D6:00/input/input36
[ 9.551161] intel-vbtn INT33D6:00: Registering Intel Virtual Switches
input-dev after receiving a switch event
[ 9.552011] sysfs: cannot create duplicate filename
'/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/INT33D6:00/input/input36'
[ 9.552017] CPU: 2 PID: 206 Comm: kworker/2:4 Not tainted 6.8.0-44-generic
#44-Ubuntu
[ 9.552022] Hardware name: LENOVO 20CHS10P02/20CHS10P02, BIOS N17ETB6W (2.16
) 09/02/2021
[ 9.552025] Workqueue: kacpi_notify acpi_os_execute_deferred
[ 9.552034] Call Trace:
[ 9.552037] <TASK>
[ 9.552040] dump_stack_lvl+0x76/0xa0
[ 9.552047] dump_stack+0x10/0x20
[ 9.552051] sysfs_warn_dup+0x8a/0xb0
[ 9.552057] sysfs_create_dir_ns+0xe0/0x100
[ 9.552063] kobject_add_internal+0xa8/0x2f0
[ 9.552067] kobject_add+0x93/0x100
[ 9.552071] ? get_device_parent+0xd0/0x210
[ 9.552076] device_add+0xe0/0x740
[ 9.552079] input_register_device+0xe8/0x370
[ 9.552087] notify_handler+0x12e/0x1a0 [intel_vbtn]
[ 9.552095] acpi_ev_notify_dispatch+0x59/0xa0
[ 9.552101] acpi_os_execute_deferred+0x1a/0x40
[ 9.552105] process_one_work+0x16f/0x350
[ 9.552112] worker_thread+0x306/0x440
[ 9.552117] ? _raw_spin_lock_irqsave+0xe/0x20
[ 9.552122] ? __pfx_worker_thread+0x10/0x10
[ 9.552127] kthread+0xf2/0x120
[ 9.552131] ? __pfx_kthread+0x10/0x10
[ 9.552135] ret_from_fork+0x47/0x70
[ 9.552139] ? __pfx_kthread+0x10/0x10
[ 9.552143] ret_from_fork_asm+0x1b/0x30
[ 9.552149] </TASK>
[ 9.552151] kobject: kobject_add_internal failed for input36 with -EEXIST,
don't try to register things with the same name in the same directory.
[ 9.615562] BUG: kernel NULL pointer dereference, address: 0000000000000018
[ 9.615634] #PF: supervisor read access in kernel mode
[ 9.615681] #PF: error_code(0x0000) - not-present page
[ 9.615727] PGD 0 P4D 0
[ 9.615753] Oops: 0000 [#1] PREEMPT SMP PTI
[ 9.615793] CPU: 2 PID: 204 Comm: kworker/2:3 Not tainted 6.8.0-44-generic
#44-Ubuntu
[ 9.615863] Hardware name: LENOVO 20CHS10P02/20CHS10P02, BIOS N17ETB6W (2.16
) 09/02/2021
[ 9.615934] Workqueue: kacpi_notify acpi_os_execute_deferred
[ 9.615992] RIP: 0010:klist_add_tail+0x2a/0x80
[ 9.616039] Code: 55 48 89 e5 41 55 4c 8d 6f 08 41 54 49 89 fc 53 48 89 f3
48 89 37 83 e6 01 4c 89 6f 08 4c 89 6f 10 c7 47 18 01 00 00 00 75 4d <48> 8b 43
18 48 85 c0 74 08 4c 89 e7 e8 05 39 0c 00 48 89 df e8 4d
[ 9.616200] RSP: 0018:ffffbe9c00513c98 EFLAGS: 00010246
[ 9.616249] RAX: ffff992c95e69700 RBX: 0000000000000000 RCX: 0000000000000000
[ 9.616307] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff992c95e69728
[ 9.616368] RBP: ffffbe9c00513cb0 R08: 0000000000000000 R09: 0000000000000000
[ 9.616422] R10: 0000000000000000 R11: 0000000000000000 R12: ffff992c95e69728
[ 9.616488] R13: ffff992c95e69730 R14: 0000000000000000 R15: ffff992c99fe2890
[ 9.616551] FS: 0000000000000000(0000) GS:ffff992da5b00000(0000)
knlGS:0000000000000000
[ 9.616627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9.616681] CR2: 0000000000000018 CR3: 000000010c34e006 CR4: 00000000003706f0
[ 9.616747] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 9.616810] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 9.616876] Call Trace:
[ 9.616902] <TASK>
[ 9.616924] ? show_regs+0x6d/0x80
[ 9.616960] ? __die+0x24/0x80
[ 9.616992] ? page_fault_oops+0x99/0x1b0
[ 9.618392] ? do_user_addr_fault+0x2e2/0x670
[ 9.619819] ? exc_page_fault+0x83/0x1b0
[ 9.621268] ? asm_exc_page_fault+0x27/0x30
[ 9.622752] ? klist_add_tail+0x2a/0x80
[ 9.624234] device_add+0x590/0x740
[ 9.625492] cdev_device_add+0x4e/0xc0
[ 9.626728] ? cdev_init+0x56/0x70
[ 9.628295] evdev_connect+0x1a9/0x210
[ 9.629892] input_attach_handler.isra.0+0x84/0xc0
[ 9.631508] input_register_device+0x231/0x370
[ 9.632591] notify_handler+0x12e/0x1a0 [intel_vbtn]
[ 9.634220] acpi_ev_notify_dispatch+0x59/0xa0
[ 9.635900] acpi_os_execute_deferred+0x1a/0x40
[ 9.637549] process_one_work+0x16f/0x350
[ 9.639318] worker_thread+0x306/0x440
[ 9.641174] ? _raw_spin_lock_irqsave+0xe/0x20
[ 9.642998] ? __pfx_worker_thread+0x10/0x10
[ 9.644749] kthread+0xf2/0x120
[ 9.646513] ? __pfx_kthread+0x10/0x10
[ 9.648305] ret_from_fork+0x47/0x70
[ 9.650086] ? __pfx_kthread+0x10/0x10
[ 9.651870] ret_from_fork_asm+0x1b/0x30
[ 9.653666] </TASK>
[ 9.655375] Modules linked in: mei_pxp(+) spi_intel_platform(+) spi_intel
snd_soc_bdw_rt286 intel_rapl_msr snd_hda_codec_hdmi binfmt_misc iwlmvm mac80211
nls_iso8859_1 libarc4 x86_pkg_temp_thermal uvcvideo hid_sensor_accel_3d
intel_powerclamp hid_sensor_magn_3d hid_sensor_incl_3d hid_sensor_gyro_3d
hid_sensor_als hid_sensor_rotation hid_sensor_trigger videobuf2_vmalloc rapl
uvc videobuf2_memops industrialio_triggered_buffer btusb intel_cstate
snd_usb_audio videobuf2_v4l2 kfifo_buf iwlwifi snd_usbmidi_lib btrtl snd_ump
videodev hid_sensor_iio_common btintel think_lmi(+) i2c_i801 mei_me btbcm
snd_seq_midi industrialio firmware_attributes_class wmi_bmof i2c_smbus
intel_pch_thermal snd_seq_midi_event cfg80211 videobuf2_common btmtk mei
lpc_ich snd_seq i915 bluetooth snd_rawmidi cdc_acm snd_sof_acpi_intel_bdw
ecdh_generic ecc snd_seq_device snd_hda_intel snd_sof_acpi drm_buddy
snd_sof_xtensa_dsp mc ttm snd_hda_codec snd_sof drm_display_helper snd_hda_core
processor_thermal_device_pci_legacy snd_sof_utils
[ 9.655475] processor_thermal_device snd_hwdep processor_thermal_wt_hint
processor_thermal_rfim snd_soc_acpi_intel_match processor_thermal_rapl
intel_rapl_common cec snd_soc_rt298 rc_core processor_thermal_wt_req
processor_thermal_power_floor processor_thermal_mbox i2c_algo_bit
intel_soc_dts_iosf snd_soc_catpt thinkpad_acpi snd_soc_acpi snd_soc_rt286 nvram
snd_intel_dspcfg snd_soc_rl6347a intel_vbtn snd_intel_sdw_acpi soc_button_array
sparse_keymap int3403_thermal snd_soc_core hid_logitech_hidpp snd_compress
ac97_bus cdc_mbim snd_pcm_dmaengine cdc_wdm snd_pcm intel_pmc_core intel_vsec
pmt_telemetry snd_timer int3402_thermal int3400_thermal int340x_thermal_zone
pmt_class acpi_thermal_rel input_leds joydev mac_hid serio_raw coretemp msr
parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables
autofs4 hid_logitech_dj hid_lenovo cdc_ncm cdc_ether uas usbnet mii usb_storage
hid_sensor_custom crct10dif_pclmul crc32_pclmul snd polyval_clmulni wacom ahci
polyval_generic usbhid soundcore xhci_pci
[ 9.669670] ghash_clmulni_intel hid_sensor_hub hid_generic sha256_ssse3
sha1_ssse3 psmouse ledtrig_audio libahci xhci_pci_renesas spi_pxa2xx_platform
platform_profile i2c_hid_acpi video i2c_hid hid wmi dw_dmac pinctrl_lynxpoint
dw_dmac_core aesni_intel crypto_simd cryptd
[ 9.693424] CR2: 0000000000000018
[ 9.696390] ---[ end trace 0000000000000000 ]---
```
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2080355
Title:
Kernel trouble, with some trace, 6.8.0-44-generic
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