Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 126075067 P4D 126075067 PUD 0 
Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 2 PID: 2674189 Comm: kworker/u16:4 Not tainted 5.18.13-200.fc36.x86_64 #1
Hardware name: LENOVO 20XW00A2RT/20XW00A2RT, BIOS N32ET76W (1.52 ) 04/08/2022
Workqueue: netns cleanup_net
RIP: 0010:rb_erase+0x116/0x370
Code: a8 01 0f 84 54 02 00 00 48 83 f8 03 77 05 c3 cc cc cc cc 48 83 e0 fc 48 89 ca 48 89 c1 48 8b 41 08 48 39 d0 75 a7 48 8b 41 10 <f6> 00 01 0f 84 2b 01 00 00 48 8b 70 10 48 85 f6 74 05 f6 06 01 74
RSP: 0018:ffffb7de6165fbd8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88cf22f72100 RCX: ffff88d13d012df0
RDX: 0000000000000000 RSI: ffff88d13d012e11 RDI: ffff88d13d012db0
RBP: ffffb7de6165fc01 R08: ffff88cf22f72150 R09: 0000000000000000
R10: ffff88d13d012e10 R11: 0000000000000002 R12: ffff88d13d012c00
R13: ffff88cf0be40b08 R14: 00000000ffffffff R15: ffff88cf0be43000
FS:  0000000000000000(0000) GS:ffff88d24d480000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000002d2012004 CR4: 0000000000770ee0
PKRU: 55555554
Call Trace:
 <TASK>
 drop_sysctl_table+0xb0/0x150
 unregister_sysctl_table.part.0+0x3b/0x90
 neigh_sysctl_unregister+0x1f/0x30
 addrconf_ifdown.isra.0+0x6b0/0x780
 ? lock_timer_base+0x61/0x80
 ? preempt_count_add+0x6a/0xa0
 ? _raw_spin_lock+0x13/0x40
 addrconf_notify+0xc2/0x8e0
 raw_notifier_call_chain+0x41/0x60
 unregister_netdevice_many+0x3af/0x760
 default_device_exit_batch+0x1f7/0x260
 cleanup_net+0x20d/0x390
 process_one_work+0x1c4/0x380
 worker_thread+0x4d/0x380
 ? _raw_spin_lock_irqsave+0x23/0x50
 ? process_one_work+0x380/0x380
 kthread+0xe6/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in: uas usb_storage r8153_ecm cdc_ether usbnet r8152 mii snd_seq_midi snd_seq_midi_event snd_usb_audio snd_usbmidi_lib snd_rawmidi joydev tls tun binfmt_misc uinput rfcomm snd_seq_dummy snd_hrtimer mhi_wwan_mbim mhi_wwan_ctrl 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 snd_ctl_led snd_soc_skl_hda_dsp snd_soc_intel_hda_dsp_common snd_soc_hdac_hdmi snd_sof_probes sunrpc 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_sof_utils snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi soundwire_bus iwlmvm snd_soc_core
 intel_tcc_cooling x86_pkg_temp_thermal snd_compress intel_powerclamp mac80211 iTCO_wdt ac97_bus intel_pmc_bxt mei_hdcp snd_pcm_dmaengine mei_pxp iTCO_vendor_support coretemp kvm_intel snd_hda_intel pmt_telemetry snd_intel_dspcfg libarc4 intel_rapl_msr pmt_class snd_intel_sdw_acpi kvm snd_hda_codec snd_hda_core iwlwifi snd_hwdep irqbypass uvcvideo snd_seq intel_cstate iwlmei snd_seq_device vfat videobuf2_vmalloc btusb videobuf2_memops intel_uncore fat snd_pcm btrtl videobuf2_v4l2 btbcm think_lmi i2c_i801 videobuf2_common pcspkr cfg80211 mhi_pci_generic firmware_attributes_class wmi_bmof btintel snd_timer i2c_smbus videodev btmtk mei_me mhi bluetooth mei idma64 mc nxp_nci_i2c processor_thermal_device_pci_legacy processor_thermal_device nxp_nci processor_thermal_rfim thinkpad_acpi nci processor_thermal_mbox ecdh_generic processor_thermal_rapl ledtrig_audio thunderbolt intel_vsec intel_rapl_common intel_soc_dts_iosf platform_profile nfc igen6_edac rfkill snd soundcore
 int3403_thermal int340x_thermal_zone soc_button_array intel_hid sparse_keymap acpi_tad int3400_thermal acpi_pad acpi_thermal_rel zram i915 crct10dif_pclmul crc32_pclmul crc32c_intel nvme drm_buddy drm_dp_helper ghash_clmulni_intel serio_raw nvme_core ucsi_acpi typec_ucsi ttm typec wmi video pinctrl_tigerlake ip6_tables ip_tables fuse
CR2: 0000000000000000