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: 5 PID: 109279 Comm: kworker/u24:102 Tainted: G           OE     5.17.5-200.fc35.x86_64 #1
Hardware name: LENOVO 20TJS2F45T/20TJS2F45T, BIOS N2VET36W (1.21 ) 12/27/2021
Workqueue: netns cleanup_net
RIP: 0010:rb_erase+0x108/0x360
Code: 00 48 89 10 48 8b 02 a8 01 0f 84 3d 02 00 00 48 83 e0 fc 75 02 c3 cc 48 89 d1 48 89 c2 48 8b 42 08 48 39 c8 75 ae 48 8b 42 10 <f6> 00 01 0f 84 20 01 00 00 48 8b 70 10 48 85 f6 74 05 f6 06 01 74
RSP: 0018:ffffb68810747be0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9d90494cb800 RCX: 0000000000000000
RDX: ffff9d8b043599f0 RSI: 0000000000000000 RDI: ffff9d8b043599b0
RBP: ffff9d8b04359800 R08: ffff9d90494cb850 R09: 0000000000000000
R10: ffff9d8b04359a10 R11: 0000000000000001 R12: ffff9d8b68f33308
R13: ffff9d8b68f33f40 R14: ffff9d8b68f34000 R15: ffff9d8b68f34268
FS:  0000000000000000(0000) GS:ffff9d925c340000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105c5c003 CR4: 00000000007706e0
PKRU: 55555554
Call Trace:
 <TASK>
 drop_sysctl_table+0xa1/0x140
 ? preempt_count_add+0x6a/0xa0
 unregister_sysctl_table.part.0+0x3b/0x90
 neigh_sysctl_unregister+0x20/0x30
 addrconf_ifdown.isra.0+0x5c4/0x710
 ? _raw_spin_lock+0x13/0x40
 ? krc_this_cpu_lock+0x37/0x40
 addrconf_notify+0x5b/0x930
 raw_notifier_call_chain+0x41/0x60
 unregister_netdevice_many+0x37e/0x760
 default_device_exit_batch+0x131/0x150
 ? init_wait_entry+0x30/0x30
 cleanup_net+0x203/0x390
 process_one_work+0x1e2/0x3b0
 worker_thread+0x50/0x3a0
 ? rescuer_thread+0x370/0x370
 kthread+0xe5/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in: tun xt_MASQUERADE xt_comment nft_compat veth bridge stp llc overlay vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) uinput rfcomm snd_seq_dummy snd_hrtimer 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 nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink qrtr bnep sunrpc vfat fat 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 iwlmvm snd_hda_codec_generic snd_soc_dmic snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation mac80211 soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof soundwire_bus snd_soc_skl snd_soc_hdac_hda libarc4 snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp iTCO_wdt intel_tcc_cooling ee1004 intel_pmc_bxt snd_soc_acpi_intel_match x86_pkg_temp_thermal
 snd_soc_acpi iTCO_vendor_support mei_hdcp mei_wdt intel_powerclamp mei_pxp intel_rapl_msr iwlwifi snd_soc_core coretemp kvm_intel snd_compress kvm ac97_bus snd_pcm_dmaengine cdc_ether irqbypass snd_hda_intel rapl usbnet snd_intel_dspcfg btusb intel_cstate snd_intel_sdw_acpi intel_uncore snd_usb_audio pcspkr sparse_keymap snd_hda_codec uvcvideo btrtl think_lmi r8152 btbcm videobuf2_vmalloc snd_hda_core iwlmei firmware_attributes_class snd_usbmidi_lib videobuf2_memops i2c_i801 btintel intel_wmi_thunderbolt videobuf2_v4l2 wmi_bmof snd_seq snd_rawmidi snd_hwdep i2c_smbus processor_thermal_device_pci_legacy mii btmtk videobuf2_common snd_seq_device processor_thermal_device cfg80211 bluetooth videodev snd_pcm processor_thermal_rfim mc thinkpad_acpi processor_thermal_mbox mei_me snd_timer processor_thermal_rapl joydev ledtrig_audio ecdh_generic mei intel_rapl_common platform_profile thunderbolt intel_pch_thermal intel_soc_dts_iosf rfkill snd soundcore int3403_thermal
 int340x_thermal_zone int3400_thermal acpi_thermal_rel acpi_tad acpi_pad zram ip_tables dm_crypt wacom i915 i2c_algo_bit drm_kms_helper cec rtsx_pci_sdmmc ttm mmc_core drm nvme crct10dif_pclmul crc32_pclmul crc32c_intel nvme_core ghash_clmulni_intel rtsx_pci serio_raw ucsi_acpi typec_ucsi typec wmi video pinctrl_cannonlake ipmi_devintf ipmi_msghandler fuse
CR2: 0000000000000000