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: 1395408 Comm: kworker/u16:8 Tainted: G           O      5.17.13-300.fc36.x86_64 #1
Hardware name: LENOVO 20QD0007US/20QD0007US, BIOS N2HET68W (1.51 ) 03/22/2022
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:ffffabe687537bd8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff99a726ef2300 RCX: ffff99a5453ee1f0
RDX: 0000000000000000 RSI: ffff99a5453ee211 RDI: ffff99a5453ee1b0
RBP: ffffabe687537c01 R08: ffff99a726ef2350 R09: 0000000000000000
R10: ffff99a5453ee210 R11: 0000000000000000 R12: ffff99a5453ee000
R13: ffff99a7c48e7308 R14: ffff99a653302000 R15: ffff99a7c48e4800
FS:  0000000000000000(0000) GS:ffff99a9ac7c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000177e10003 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drop_sysctl_table+0xb0/0x150
 unregister_sysctl_table.part.0+0x3b/0x90
 neigh_sysctl_unregister+0x1f/0x30
 addrconf_ifdown.isra.0+0x5e8/0x720
 ? lock_timer_base+0x61/0x80
 ? _raw_spin_lock+0x13/0x40
 ? krc_this_cpu_lock+0x37/0x40
 addrconf_notify+0xc2/0x8d0
 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
 ? _raw_spin_lock_irqsave+0x25/0x50
 ? process_one_work+0x380/0x380
 kthread+0xe6/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in: tun uinput rfcomm snd_seq_dummy snd_hrtimer nf_conntrack_netlink xt_addrtype br_netfilter xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc tls 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 overlay nfnetlink ip6table_filter iptable_filter 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 snd_hda_codec_generic snd_soc_dmic snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence intel_tcc_cooling snd_sof_intel_hda x86_pkg_temp_thermal intel_powerclamp
 snd_sof_pci snd_sof_xtensa_dsp coretemp snd_sof soundwire_bus kvm_intel iTCO_wdt snd_soc_skl kvm snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc intel_pmc_bxt iwlmvm iTCO_vendor_support snd_soc_sst_dsp irqbypass mei_wdt snd_soc_acpi_intel_match mei_hdcp mei_pxp snd_soc_acpi mac80211 snd_soc_core snd_compress intel_rapl_msr rapl ac97_bus snd_pcm_dmaengine intel_cstate libarc4 snd_hda_intel snd_intel_dspcfg intel_uncore btusb iwlwifi snd_intel_sdw_acpi btrtl pcspkr think_lmi firmware_attributes_class snd_hda_codec btbcm iwlmei btintel wmi_bmof intel_wmi_thunderbolt i2c_i801 snd_usb_audio btmtk uvcvideo cfg80211 snd_hda_core thunderbolt snd_usbmidi_lib i2c_smbus videobuf2_vmalloc mei_me videobuf2_memops bluetooth snd_hwdep videobuf2_v4l2 snd_rawmidi snd_seq idma64 mei videobuf2_common thinkpad_acpi snd_seq_device snd_pcm ledtrig_audio joydev ecdh_generic platform_profile snd_timer rfkill processor_thermal_device_pci_legacy snd processor_thermal_device soundcore
 int3403_thermal processor_thermal_rfim processor_thermal_mbox processor_thermal_rapl intel_rapl_common acpi_tad int340x_thermal_zone int3400_thermal acpi_pad intel_pch_thermal acpi_thermal_rel intel_soc_dts_iosf v4l2loopback(O) videodev mc zram dm_crypt hid_logitech_hidpp pegasus hid_logitech hid_logitech_dj mii ff_memless i915 nvme hid_multitouch ucsi_acpi crct10dif_pclmul crc32_pclmul crc32c_intel e1000e typec_ucsi ghash_clmulni_intel serio_raw nvme_core typec ttm wmi i2c_hid_acpi i2c_hid video pinctrl_cannonlake ip6_tables ip_tables ipmi_devintf ipmi_msghandler fuse
CR2: 0000000000000000