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: 7 PID: 2426851 Comm: kworker/u16:44 Tainted: G          IOE     5.18.9-200.fc36.x86_64 #1
Hardware name: LENOVO 20TD002LCK/20TD002LCK, BIOS R1EET28W(1.28 ) 11/09/2020
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:ffffb984c4cfbc70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff98259f545f00 RCX: ffff982586945df0
RDX: 0000000000000000 RSI: ffff982586945e11 RDI: ffff982586945db0
RBP: ffffb984c4cfbd01 R08: ffff98259f545f50 R09: 0000000000000000
R10: ffff982586945e10 R11: 0000000000000007 R12: ffff982586945c00
R13: ffff9826b6d56b08 R14: ffff982a90438000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff982cdd3c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000106a96005 CR4: 0000000000770ee0
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
 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
 ? process_one_work+0x380/0x380
 kthread+0xe6/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in: binfmt_misc exfat ses enclosure scsi_transport_sas uas usb_storage tls tun rfcomm snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc 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 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 nf_tables nfnetlink ip6table_filter iptable_filter vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) qrtr bnep sunrpc vfat fat elan_i2c snd_ctl_led snd_soc_skl_hda_dsp snd_soc_intel_hda_dsp_common snd_soc_hdac_hdmi snd_sof_probes 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 iTCO_wdt snd_soc_acpi pmt_telemetry intel_pmc_bxt soundwire_bus mei_hdcp mei_pxp ee1004 iTCO_vendor_support intel_rapl_msr pmt_class intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp iwlmvm snd_soc_core coretemp snd_compress ac97_bus snd_pcm_dmaengine mac80211 kvm_intel snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi kvm libarc4 snd_hda_codec irqbypass snd_hda_core intel_cstate intel_uncore snd_hwdep iwlwifi uvcvideo btusb snd_seq btrtl videobuf2_vmalloc iwlmei videobuf2_memops pcspkr snd_seq_device btbcm videobuf2_v4l2 think_lmi btintel joydev snd_pcm firmware_attributes_class wmi_bmof btmtk i2c_i801 videobuf2_common i2c_smbus bluetooth snd_timer cfg80211 mei_me videodev processor_thermal_device_pci_legacy idma64 processor_thermal_device processor_thermal_rfim processor_thermal_mbox mc mei ecdh_generic processor_thermal_rapl
 intel_rapl_common thunderbolt intel_vsec thinkpad_acpi intel_soc_dts_iosf ledtrig_audio platform_profile rfkill snd soundcore int3403_thermal int340x_thermal_zone int3400_thermal igen6_edac acpi_thermal_rel acpi_tad acpi_pad zram i915 nouveau crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel nvme drm_ttm_helper mxm_wmi drm_buddy serio_raw r8169 drm_dp_helper nvme_core ucsi_acpi typec_ucsi typec ttm wmi video pinctrl_tigerlake ip6_tables ip_tables ipmi_devintf ipmi_msghandler fuse
CR2: 0000000000000000