Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000050
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 2 PID: 90 Comm: kworker/2:1 Tainted: G     U            -------  ---  6.8.0-0.rc6.49.fc40.x86_64 #1
Hardware name: Dell Inc. XPS 13 9370/0F6P3V, BIOS 1.21.0 07/06/2022
Workqueue: events dp_altmode_work [typec_displayport]
RIP: 0010:device_find_child+0x39/0xc0
Code: 48 83 ec 18 65 48 8b 04 25 28 00 00 00 48 89 44 24 10 31 c0 48 c7 04 24 00 00 00 00 48 c7 44 24 08 00 00 00 00 48 85 ff 74 78 <48> 8b 7f 48 49 89 f4 48 89 e6 49 89 d5 48 89 e5 e8 82 68 4e 00 48
RSP: 0000:ffffb3ad80397dc0 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff9ce4432bcb28 RCX: ffff9ce44f5933b8
RDX: ffffffffc05c04e0 RSI: 0000000000000000 RDI: 0000000000000008
RBP: ffffb3ad80397e44 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8d464880 R12: 00000000ff01a110
R13: ffff9ce441301c08 R14: ffff9ce440167005 R15: ffff9ce44ce00960
FS:  0000000000000000(0000) GS:ffff9ce7de680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000050 CR3: 00000001d56b8005 CR4: 00000000003706f0
Call Trace:
 <TASK>
 ? __die+0x23/0x70
 ? page_fault_oops+0x174/0x530
 ? __switch_to_asm+0x3e/0x70
 ? finish_task_switch.isra.0+0x94/0x2f0
 ? exc_page_fault+0x7f/0x180
 ? asm_exc_page_fault+0x26/0x30
 ? __pfx_partner_match+0x10/0x10 [typec]
 ? device_find_child+0x39/0xc0
 typec_get_negotiated_svdm_version+0x1c/0x50 [typec]
 ucsi_displayport_vdm+0x4d/0x210 [typec_ucsi]
 dp_altmode_work+0x13e/0x170 [typec_displayport]
 process_one_work+0x16d/0x330
 worker_thread+0x273/0x3c0
 ? __pfx_worker_thread+0x10/0x10
 kthread+0xe5/0x120
 ? __pfx_kthread+0x10/0x10
 ret_from_fork+0x31/0x50
 ? __pfx_kthread+0x10/0x10
 ret_from_fork_asm+0x1b/0x30
 </TASK>
Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set des3_ede_x86_64 des_generic libdes nf_tables md4 ip6table_filter iptable_filter qrtr snd_hda_codec_hdmi bnep sunrpc snd_sof_pci_intel_skl snd_sof_intel_hda_common soundwire_intel snd_sof_intel_hda_mlink soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils soundwire_generic_allocation soundwire_bus snd_soc_avs snd_soc_hda_codec snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi snd_ctl_led snd_hda_codec_realtek
 snd_soc_core snd_hda_codec_generic intel_uncore_frequency intel_uncore_frequency_common intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp snd_compress ac97_bus coretemp snd_pcm_dmaengine ath10k_pci iTCO_wdt kvm_intel snd_hda_intel intel_pmc_bxt ath10k_core mei_pxp iTCO_vendor_support mei_wdt mei_hdcp binfmt_misc dell_laptop snd_intel_dspcfg snd_intel_sdw_acpi intel_rapl_msr kvm snd_usb_audio dell_smm_hwmon snd_hda_codec mac80211 btusb snd_usbmidi_lib snd_hda_core dell_wmi irqbypass snd_ump vfat btrtl snd_rawmidi fat snd_hwdep rapl btintel libarc4 snd_seq uvcvideo dell_smbios ath snd_seq_device btbcm intel_cstate dcdbas uvc btmtk intel_uncore wmi_bmof videobuf2_vmalloc snd_pcm dell_wmi_descriptor cdc_acm intel_wmi_thunderbolt ledtrig_audio pcspkr i2c_i801 videobuf2_memops cfg80211 bluetooth videobuf2_v4l2 videobuf2_common snd_timer i2c_smbus snd videodev processor_thermal_device_pci_legacy processor_thermal_device soundcore processor_thermal_wt_hint processor_thermal_rfim mc processor_thermal_rapl
 intel_rapl_common mei_me rfkill mei processor_thermal_wt_req processor_thermal_power_floor intel_xhci_usb_role_switch idma64 processor_thermal_mbox intel_pch_thermal intel_soc_dts_iosf intel_pmc_core int3403_thermal intel_vsec intel_hid int3400_thermal int340x_thermal_zone acpi_pad acpi_thermal_rel pmt_telemetry pmt_class sparse_keymap joydev loop dm_multipath nfnetlink zram dm_crypt typec_displayport i915 i2c_algo_bit crct10dif_pclmul crc32_pclmul crc32c_intel drm_buddy polyval_clmulni polyval_generic ttm rtsx_pci_sdmmc nvme drm_display_helper mmc_core ghash_clmulni_intel nvme_core ucsi_acpi sha512_ssse3 hid_multitouch sha256_ssse3 rtsx_pci sha1_ssse3 typec_ucsi nvme_auth i2c_hid_acpi typec cec i2c_hid video pinctrl_sunrisepoint wmi serio_raw scsi_dh_rdac scsi_dh_emc scsi_dh_alua ip6_tables ip_tables pkcs8_key_parser fuse
CR2: 0000000000000050