Backtrace

BUG: unable to handle page fault for address: ffffa9b124f944ed
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP PTI
CPU: 3 PID: 3474096 Comm: serial Tainted: G           OE     5.13.4-200.fc34.x86_64 #1
Hardware name: INTEL H81/H81, BIOS 4.6.5 04/18/2019
RIP: 0010:kobj_lookup+0x115/0x160
Code: e8 a0 97 98 ff 48 8b 44 24 10 48 85 c0 75 3e 49 8b bc 24 f8 07 00 00 e8 b9 ad 41 00 48 8b 44 24 18 49 8b 2c c4 48 85 ed 74 14 <8b> 45 08 39 d8 0f 86 33 ff ff ff 48 8b 6d 00 48 85 ed 75 ec 49 8b
RSP: 0018:ffffb5960a37fc58 EFLAGS: 00010282
RAX: 00000000a75669a2 RBX: 0000000000400040 RCX: 0000000000000004
RDX: ffff9946b9a98000 RSI: 0000000000400040 RDI: ffffffff8cdf1280
RBP: ffffa9b124f944e5 R08: 00000000000000f3 R09: 0000000000000064
R10: ffffb5960a37fcf8 R11: 00000000fffffda8 R12: ffff99444004c000
R13: ffff9944421df280 R14: ffffb5960a37fcbc R15: 0000000000000000
FS:  00007f8e674b7ac0(0000) GS:ffff99474fac0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffa9b124f944ed CR3: 0000000113fba003 CR4: 00000000001706e0
Call Trace:
 chrdev_open+0x137/0x220
 ? cdev_default_release+0x20/0x20
 do_dentry_open+0x14b/0x360
 path_openat+0xab3/0x1020
 ? filemap_map_pages+0x22e/0x700
 do_filp_open+0x8f/0x120
 ? __check_object_size+0x136/0x150
 ? alloc_fd+0x50/0x170
 do_sys_openat2+0x7a/0x130
 __x64_sys_openat+0x45/0x70
 do_syscall_64+0x40/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8e686c203b
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:00007ffe2e9d1d90 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffe2e9d5750 RCX: 00007f8e686c203b
RDX: 0000000000000901 RSI: 00007ffe2e9d3750 RDI: 00000000ffffff9c
RBP: 00007ffe2e9d3750 R08: 0000000000000000 R09: 00007ffe2e9d1ba7
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000901
R13: 00005567dfcfa108 R14: 0000000000000001 R15: 00007ffe2e9d3750
Modules linked in: usblp nls_utf8 isofs uinput snd_seq_dummy snd_hrtimer snd_seq xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp 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 sunrpc intel_rapl_msr intel_rapl_common rtl8188ee rtl_pci rtlwifi x86_pkg_temp_thermal intel_powerclamp mac80211 coretemp mei_hdcp at24 iTCO_wdt intel_pmc_bxt kvm_intel iTCO_vendor_support kvm cfg80211 snd_hda_codec_realtek snd_hda_codec_generic irqbypass snd_hda_codec_hdmi snd_usb_audio ledtrig_audio rapl snd_hda_intel intel_cstate intel_uncore snd_intel_dspcfg i2c_i801 snd_usbmidi_lib
 snd_intel_sdw_acpi snd_rawmidi pcspkr i2c_smbus rfkill snd_hda_codec mei_me joydev lpc_ich libarc4 snd_seq_device mei snd_hda_core snd_hwdep v4l2loopback(OE) snd_aloop zram ip_tables uas usb_storage i915 i2c_algo_bit drm_kms_helper cec crct10dif_pclmul crc32_pclmul crc32c_intel drm ghash_clmulni_intel r8169 video fuse snd_pcm snd_timer snd soundcore videodev mc
CR2: ffffa9b124f944ed