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] SMP NOPTI
CPU: 1 PID: 6611 Comm: kworker/1:1 Tainted: G          I       5.14.18-100.fc33.x86_64 #1
Hardware name: ASUS System Product Name/PRIME Z390-A, BIOS 2004 11/02/2021
Workqueue: cgwb_release cgwb_release_workfn
RIP: 0010:__bfq_deactivate_entity+0x5b/0x240
Code: b8 30 00 00 00 75 18 48 81 ff 88 00 00 00 74 0f 0f b7 47 8a 83 e8 01 48 8d 04 40 48 c1 e0 04 4c 8b 73 68 48 63 73 40 48 89 df <4d> 8b 3e 4d 8d 64 06 10 e8 68 f0 ff ff 49 39 df 0f 84 85 01 00 00
RSP: 0018:ffffa418812f7d98 EFLAGS: 00010006
RAX: 000000000008eb30 RBX: ffff9382d3b3b098 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9382d3b3b098
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff9382c15672d0
R10: 0000000000000002 R11: ffff938126ad6da0 R12: ffff9380dbffe800
R13: 0000000000000090 R14: 0000000000000000 R15: ffff9382d3b3a898
FS:  0000000000000000(0000) GS:ffff93880dc40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000005fac10002 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 bfq_pd_offline+0x89/0xd0
 blkg_destroy+0x4f/0xf0
 blkcg_destroy_blkgs+0x46/0xd0
 cgwb_release_workfn+0x129/0x1d0
 process_one_work+0x1e9/0x390
 worker_thread+0x53/0x3e0
 ? process_one_work+0x390/0x390
 kthread+0x124/0x150
 ? set_kthread_struct+0x40/0x40
 ret_from_fork+0x1f/0x30
Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs uas usb_storage cdc_mbim cdc_wdm cdc_ncm cdc_ether ax88179_178a usbnet mii uinput xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT tun bridge stp llc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_usb_audio videobuf2_common videodev snd_usbmidi_lib snd_rawmidi mc joydev nf_nat_tftp nf_conntrack_netbios_ns nf_conntrack_broadcast nft_objref nf_conntrack_tftp 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 ip6_tables iptable_filter snd_sof_pci_intel_cnl 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 soundwire_bus snd_soc_skl nct6775 snd_hda_codec_hdmi snd_soc_hdac_hda hwmon_vid snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match intel_rapl_msr snd_soc_acpi intel_rapl_common sunrpc snd_soc_core snd_hda_codec_realtek snd_hda_codec_generic snd_compress ac97_bus ledtrig_audio snd_pcm_dmaengine snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi iTCO_wdt intel_pmc_bxt mei_hdcp intel_tcc_cooling ee1004 iTCO_vendor_support snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_hda_core coretemp rapl vfat snd_hwdep fat intel_cstate eeepc_wmi snd_seq snd_seq_device asus_wmi intel_uncore sparse_keymap snd_pcm pcspkr rfkill intel_wmi_thunderbolt wmi_bmof mxm_wmi snd_timer snd i2c_i801 mei_me soundcore i2c_smbus mei acpi_tad acpi_pad zram ip_tables dm_crypt trusted asn1_encoder hid_logitech_hidpp hid_logitech_dj i915 i2c_algo_bit ttm drm_kms_helper cec drm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel e1000e wmi
 video pinctrl_cannonlake fuse
CR2: 0000000000000000