Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000020
#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: 7579 Comm: plymouthd Tainted: G        W         5.11.12-300.fc34.x86_64 #1
Hardware name: Dell Inc. Vostro 3881/0CN0MP, BIOS 2.4.0 05/26/2021
RIP: 0010:klist_put+0x15/0x90
Code: 00 e9 28 ff ff ff 4c 89 f6 e8 57 cc 56 00 e9 73 ff ff ff 66 90 41 55 41 54 55 48 89 fd 53 4c 8b 27 89 f3 49 83 e4 fe 4c 89 e7 <4d> 8b 6c 24 20 e8 c1 ce 56 00 84 db 75 41 48 8d 7d 18 b8 ff ff ff
RSP: 0018:ffffadcf01abfba8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027
RDX: ffff933260458ac8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff932b41bdf188 R08: ffff932b40fbe8a0 R09: ffffadcf01abf9d8
R10: ffffadcf01abf9d0 R11: ffffffffb6b44f08 R12: 0000000000000000
R13: ffffffffb57cb830 R14: ffff932b47cb7000 R15: 0000000000000000
FS:  00007fb844fac800(0000) GS:ffff933260440000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000020 CR3: 0000000178c5c002 CR4: 00000000003706e0
Call Trace:
 ? device_match_of_node+0x20/0x20
 klist_iter_exit+0x14/0x20
 class_find_device+0x90/0xe0
 ? tty_ldisc_get.part.0+0x37/0x90
 alloc_tty_struct+0x239/0x270
 tty_init_dev.part.0+0x18/0x220
 ptmx_open+0x9e/0x190
 chrdev_open+0xe3/0x220
 ? cdev_device_add+0x90/0x90
 do_dentry_open+0x14b/0x360
 path_openat+0x9ff/0xf20
 ? do_user_addr_fault+0x1b3/0x480
 do_filp_open+0x7e/0x110
 ? 0xffffffffb5000000
 ? strncpy_from_user+0xdb/0x190
 do_sys_openat2+0x7a/0x130
 __x64_sys_openat+0x45/0x70
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb84532545b
Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 54 24 28 64 48 2b 14 25
RSP: 002b:00007ffe5a6333f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb844fac788 RCX: 00007fb84532545b
RDX: 0000000000000102 RSI: 00007fb8453c50a9 RDI: 00000000ffffff9c
RBP: 00007fb8453c50a9 R08: 00000000ffffffff R09: 00007ffe5a6336b0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000102
R13: 000056121bf50320 R14: 00007ffe5a6336b0 R15: 0000000000000019
Modules linked in: uinput exfat snd_seq_dummy snd_hrtimer rfcomm ccm 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 cmac bnep sunrpc vfat fat intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal snd_sof_pci snd_sof_intel_hda_common snd_sof_intel_hda snd_sof_intel_byt snd_sof_intel_ipc snd_sof snd_hda_codec_realtek snd_sof_xtensa_dsp snd_hda_codec_generic snd_soc_hdac_hda snd_hda_ext_core intel_powerclamp snd_hda_codec_hdmi snd_soc_acpi_intel_match snd_soc_acpi ledtrig_audio coretemp snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation kvm_intel snd_soc_core iwlmvm kvm mac80211
 snd_compress iTCO_wdt intel_pmc_bxt snd_pcm_dmaengine ucsi_ccg soundwire_cadence typec_ucsi dell_smm_hwmon iTCO_vendor_support typec irqbypass libarc4 snd_hda_codec dell_wmi dell_smbios mei_hdcp ee1004 rapl dcdbas snd_hda_core intel_cstate dell_wmi_descriptor dell_wmi_sysman ac97_bus intel_uncore wmi_bmof sparse_keymap iwlwifi i2c_i801 pcspkr snd_hwdep i2c_smbus snd_seq snd_seq_device btusb btrtl btbcm btintel snd_pcm bluetooth cfg80211 mei_me snd_timer ecdh_generic mei rfkill snd soundcore ecc i2c_nvidia_gpu acpi_pad zram ip_tables uas usb_storage i915 nouveau mxm_wmi drm_ttm_helper ttm i2c_algo_bit drm_kms_helper cec crct10dif_pclmul crc32_pclmul crc32c_intel drm ghash_clmulni_intel r8169 wmi video pinctrl_sunrisepoint fuse
CR2: 0000000000000020