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: 5 PID: 886167 Comm: kworker/5:1 Not tainted 5.14.12-100.fc33.x86_64 #1
Hardware name: LENOVO 82L5/LNVNB161216, BIOS GSCN23WW 05/11/2021
Workqueue: cgroup_destroy css_killed_work_fn
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:ffffc3f3087c3d90 EFLAGS: 00010012
RAX: 0000002fffffffd0 RBX: ffffa0dc21a8e898 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000021a8e8d0 RDI: ffffa0dc21a8e898
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc3f3087c3e18
R10: 0000000000000001 R11: ffffa0dbf40d8000 R12: ffffa0dbda106800
R13: 00000000000000b0 R14: 0000000000000000 R15: ffffa0dc21a8d898
FS:  0000000000000000(0000) GS:ffffa0e1d1f40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001062ec000 CR4: 0000000000750ee0
PKRU: 55555554
Call Trace:
 bfq_pd_offline+0x89/0xd0
 blkg_destroy+0x52/0xf0
 blkcg_destroy_blkgs+0x46/0xd0
 blkcg_css_offline+0x39/0x60
 css_killed_work_fn+0x47/0xd0
 process_one_work+0x1ec/0x390
 worker_thread+0x53/0x3e0
 ? process_one_work+0x390/0x390
 kthread+0x127/0x150
 ? set_kthread_struct+0x40/0x40
 ret_from_fork+0x22/0x30
Modules linked in: isofs loop uinput rfcomm xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp tun 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 ip6_tables iptable_filter bnep sunrpc intel_rapl_msr intel_rapl_common vfat snd_hda_codec_realtek fat snd_hda_codec_generic edac_mce_amd ledtrig_audio snd_hda_codec_hdmi kvm_amd snd_hda_intel btusb snd_intel_dspcfg btrtl snd_intel_sdw_acpi btbcm snd_hda_codec kvm uvcvideo btintel snd_hda_core videobuf2_vmalloc videobuf2_memops bluetooth videobuf2_v4l2 snd_hwdep snd_seq videobuf2_common snd_seq_device irqbypass snd_pcm videodev wmi_bmof rapl snd_timer
 cdc_ether usbnet snd mc ideapad_laptop mii ucsi_acpi joydev ecdh_generic typec_ucsi platform_profile snd_rn_pci_acp3x i2c_piix4 sparse_keymap snd_pci_acp3x soundcore typec rfkill acpi_cpufreq amd_pmc zram ip_tables amdgpu ccp iommu_v2 gpu_sched nouveau hid_sensor_hub hid_multitouch mxm_wmi drm_ttm_helper ttm i2c_algo_bit drm_kms_helper cec drm crct10dif_pclmul sdhci_pci crc32_pclmul crc32c_intel cqhci sdhci ghash_clmulni_intel nvme mmc_core serio_raw nvme_core sp5100_tco video wmi i2c_hid_acpi i2c_hid uas usb_storage fuse
CR2: 0000000000000000