Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 PID: 169636 Comm: kworker/u16:6 Tainted: G        W         5.17.13-300.fc36.x86_64 #1
Hardware name: Dell Inc. XPS 13 9310/0782YH, BIOS 3.6.0 03/17/2022
Workqueue: netns cleanup_net
RIP: 0010:rb_erase+0x110/0x350
Code: 48 8b 01 a8 01 0f 84 3c 02 00 00 48 83 f8 03 77 02 c3 cc 48 83 e0 fc 48 89 ca 48 89 c1 48 8b 41 08 48 39 d0 75 aa 48 8b 41 10 <f6> 00 01 0f 84 22 01 00 00 48 8b 70 10 48 85 f6 74 05 f6 06 01 74
RSP: 0018:ffffaf890bad3c70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9cc304928000 RCX: ffff9cbfe1a3c1f0
RDX: 0000000000000000 RSI: ffff9cbfe1a3c211 RDI: ffff9cbfe1a3c1b0
RBP: ffffaf890bad3d01 R08: ffff9cc304928050 R09: 0000000000000000
R10: ffff9cbfe1a3c210 R11: 0000000000000000 R12: ffff9cbfe1a3c000
R13: ffff9cc000eebb08 R14: ffff9cbec61b2000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff9cc33d600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000103f74006 CR4: 0000000000772ef0
PKRU: 55555554
Call Trace:
 <TASK>
 drop_sysctl_table+0xb0/0x150
 unregister_sysctl_table.part.0+0x3b/0x90
 neigh_sysctl_unregister+0x1f/0x30
 inetdev_event+0x224/0x630
 ? mutex_lock+0xe/0x30
 ? mctp_neigh_remove_dev+0x32/0xb0
 raw_notifier_call_chain+0x41/0x60
 unregister_netdevice_many+0x3ab/0x750
 default_device_exit_batch+0x131/0x150
 ? init_wait_entry+0x30/0x30
 cleanup_net+0x20d/0x390
 process_one_work+0x1c4/0x380
 worker_thread+0x4d/0x380
 ? process_one_work+0x380/0x380
 kthread+0xe6/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in: gspca_sn9c2028 gspca_main r8153_ecm cdc_ether usbnet r8152 mii snd_usb_audio snd_usbmidi_lib snd_rawmidi apple_mfi_fastcharge uas usb_storage igb dca tun xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nft_compat nf_nat_tftp nf_conntrack_tftp bridge stp llc ppp_async pppox ppp_generic slhc echainiv esp4 tls uinput rfcomm snd_seq_dummy snd_hrtimer nls_utf8 cifs cifs_arc4 cifs_md4 dns_resolver fscache netfs nft_objref 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 sunrpc nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink qrtr bnep binfmt_misc vfat fat squashfs loop btusb btrtl btbcm btintel btmtk bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc ecdh_generic snd_ctl_led snd_soc_skl_hda_dsp snd_soc_intel_hda_dsp_common snd_soc_hdac_hdmi snd_hda_codec_hdmi
 snd_hda_codec_realtek snd_hda_codec_generic snd_soc_dmic snd_sof_pci_intel_tgl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi soundwire_bus iTCO_wdt snd_soc_core intel_pmc_bxt intel_tcc_cooling iTCO_vendor_support x86_pkg_temp_thermal snd_compress mei_hdcp ac97_bus intel_powerclamp mei_pxp coretemp snd_pcm_dmaengine pmt_telemetry intel_rapl_msr pmt_class snd_hda_intel iwlmvm kvm_intel snd_intel_dspcfg snd_intel_sdw_acpi dell_laptop snd_hda_codec mac80211 dell_smm_hwmon snd_hda_core kvm snd_hwdep libarc4 snd_seq irqbypass snd_seq_device intel_cstate intel_uncore snd_pcm dell_wmi iwlwifi ledtrig_audio dell_smbios pcspkr dcdbas dell_wmi_sysman snd_timer iwlmei firmware_attributes_class dell_wmi_descriptor i2c_i801 snd wmi_bmof i2c_smbus soundcore cfg80211 mei_me rfkill joydev idma64 mei hid_sensor_als
 hid_sensor_trigger hid_sensor_iio_common industrialio_triggered_buffer kfifo_buf processor_thermal_device_pci_legacy industrialio thunderbolt processor_thermal_device processor_thermal_rfim processor_thermal_mbox processor_thermal_rapl intel_rapl_common intel_vsec igen6_edac intel_soc_dts_iosf intel_skl_int3472_tps68470 tps68470_regulator int3403_thermal clk_tps68470 int340x_thermal_zone intel_skl_int3472_discrete intel_hid int3400_thermal acpi_pad sparse_keymap acpi_thermal_rel acpi_tad zram hid_sensor_hub intel_ishtp_hid i915 nvme rtsx_pci_sdmmc nvme_core mmc_core intel_ish_ipc ucsi_acpi hid_multitouch wacom crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel typec_ucsi intel_ishtp vmd serio_raw ttm typec rtsx_pci wmi i2c_hid_acpi i2c_hid video pinctrl_tigerlake ip6_tables ip_tables ipmi_devintf ipmi_msghandler fuse
CR2: 0000000000000000