Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000010
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP NOPTI
CPU: 0 PID: 2411 Comm: rpc-worker Not tainted 5.14.18-100.fc33.x86_64 #1
Hardware name: System manufacturer System Product Name/TUF GAMING X570-PLUS, BIOS 1407 04/01/2020
RIP: 0010:cx23885_dvb_unregister+0x8a/0x110 [cx23885]
Code: 8b 85 88 00 00 00 48 8b 78 10 e8 c1 8a d6 d5 48 89 ef e8 69 24 51 d6 48 8b ab a0 06 00 00 48 85 ed 74 18 48 8b 85 88 00 00 00 <48> 8b 78 10 e8 9d 8a d6 d5 48 89 ef e8 45 24 51 d6 48 8b ab 98 06
RSP: 0018:ffff9b6ec35a7d40 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8f1087701828 RCX: 00000000820001ec
RDX: 00000000820001ed RSI: 00000000820001ec RDI: ffffbf2c446ad360
RBP: ffff8f1096aad000 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8f109ab4d200 R11: 0000000000000001 R12: ffff8f10824a1000
R13: ffff8f1087700008 R14: ffff8f1722188840 R15: ffff8f1722188860
FS:  00007fb5675e9640(0000) GS:ffff8f1ee0600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000010c3ac000 CR4: 00000000003506f0
Call Trace:
 cx23885_dev_unregister+0xe5/0x140 [cx23885]
 cx23885_finidev+0x50/0x70 [cx23885]
 pci_device_remove+0x3b/0xa0
 __device_release_driver+0x17a/0x230
 device_driver_detach+0x3c/0xa0
 unbind_store+0x113/0x130
 kernfs_fop_write_iter+0x124/0x1b0
 new_sync_write+0x108/0x180
 ? security_bpf_map_alloc+0x10/0x40
 vfs_write+0x1c2/0x260
 ksys_write+0x4f/0xc0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb577e5802f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c fd ff ff 48
RSP: 002b:00007fb5675e83f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007fb577e5802f
RDX: 000000000000000c RSI: 00007fb55c506610 RDI: 0000000000000031
RBP: 00007fb55c506610 R08: 0000000000000000 R09: 00007fb577de80c0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000031
R13: 0000000000000031 R14: 0000000000000000 R15: 00007fb55c5063d0
Modules linked in: vfio_pci vfio_virqfd vfio_iommu_type1 vfio rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache netfs vhost_net vhost vhost_iotlb tap rfcomm xt_CHECKSUM xt_MASQUERADE tun rpcrdma rdma_cm iw_cm ib_cm ib_core nf_nat_tftp nf_nat_amanda nft_counter xt_limit ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter xt_multiport ipt_REJECT nf_reject_ipv4 xt_LOG nf_log_syslog xt_conntrack nf_conntrack_tftp ts_kmp nf_conntrack_amanda nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT bonding tls ip6table_nat ip6table_mangle bridge ip6table_raw stp ip6table_security llc 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 nct6775 hwmon_vid vfat fat si2157 si2168 m88rs6000t a8293 cx25840 cx23885 altera_ci intel_rapl_msr tda18271 altera_stapl m88ds3103 intel_rapl_common tveeprom cx2341x edac_mce_amd btusb kvm_amd btrtl videobuf2_dma_sg videobuf2_memops
 videobuf2_dvb snd_hda_codec_realtek kvm snd_hda_codec_generic btbcm ledtrig_audio btintel videobuf2_v4l2 bluetooth videobuf2_common snd_hda_codec_hdmi dvb_core snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec irqbypass rapl videodev joydev ecdh_generic snd_hda_core mc snd_hwdep i2c_mux snd_seq eeepc_wmi asus_wmi pcspkr snd_seq_device sparse_keymap rfkill wmi_bmof k10temp rc_imon_pad snd_pcm i2c_piix4 imon snd_timer snd soundcore acpi_cpufreq nfsd nfs_acl lockd auth_rpcgss grace sunrpc zram ip_tables amdgpu raid1 drm_ttm_helper ttm crct10dif_pclmul crc32_pclmul iommu_v2 crc32c_intel gpu_sched ghash_clmulni_intel i2c_algo_bit drm_kms_helper serio_raw sp5100_tco cec uas drm ccp usb_storage nvme r8169 e1000e nvme_core wmi video fuse
CR2: 0000000000000010