Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000050
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP PTI
CPU: 2 PID: 2555 Comm: skypeforlinux Not tainted 5.14.17-201.fc34.x86_64 #1
Hardware name: Dell Inc. Latitude 7480/0MP2YX, BIOS 1.22.0 09/06/2021
RIP: 0010:proc_single_open+0xf/0x20
Code: 40 85 d2 75 05 e9 c1 0d f8 ff e9 dc 13 f8 ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 49 89 f8 48 89 f7 49 8b 40 d0 <48> 8b 50 50 48 8b 70 40 e9 a4 0f f8 ff 0f 1f 40 00 0f 1f 44 00 00
RSP: 0018:ffffb6924554fcc0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff904f00f4ea80 RCX: 0000000000000028
RDX: 0000000000000138 RSI: ffff905014e4c600 RDI: ffff905014e4c600
RBP: ffff904f0282c588 R08: ffff904f0282c588 R09: ffff904f0682c588
R10: ffffb6924554fcf8 R11: 006f666e696d656d R12: 0000000000000000
R13: ffff904f07684578 R14: ffff905014e4c600 R15: 0000000000000000
FS:  00007f08d5037d00(0000) GS:ffff90521e500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000050 CR3: 0000000168f70004 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 proc_reg_open+0x91/0x180
 ? proc_reg_poll+0x90/0x90
 do_dentry_open+0x14b/0x350
 path_openat+0xab3/0x1030
 ? iovec_from_user.part.0+0xcd/0x180
 do_filp_open+0x9f/0x130
 ? __check_object_size+0x136/0x150
 ? alloc_fd+0x50/0x170
 do_sys_openat2+0x7a/0x130
 __x64_sys_openat+0x45/0x70
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f08d80500b4
Code: 24 20 eb 8f 66 90 44 89 54 24 0c e8 66 f5 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 b8 f5 ff ff 8b 44
RSP: 002b:00007ffcc57c45f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffcc57c56d0 RCX: 00007f08d80500b4
RDX: 0000000000080800 RSI: 00007ffcc57c4670 RDI: 00000000ffffff9c
RBP: 00007ffcc57c4670 R08: 0000000000000000 R09: 0000557cd6a3ae78
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000080800
R13: 0000000000000000 R14: 00007ffcc57c56d0 R15: 00007ffcc57c56b0
Modules linked in: hidp rfcomm snd_seq_dummy snd_hrtimer 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 vfat fat squashfs loop btusb btrtl btbcm btintel bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev mc ecdh_generic iwlmvm mac80211 intel_tcc_cooling iTCO_wdt intel_pmc_bxt ee1004 iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp mei_hdcp libarc4 mei_wdt coretemp kvm_intel intel_rapl_msr snd_soc_skl iwlwifi snd_hda_codec_hdmi snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_ctl_led snd_soc_acpi_intel_match kvm snd_soc_acpi
 snd_soc_core dell_rbtn snd_hda_codec_realtek cfg80211 dell_laptop snd_hda_codec_generic dell_smm_hwmon snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core irqbypass rapl intel_cstate snd_hwdep intel_uncore snd_seq snd_seq_device snd_pcm dell_wmi ledtrig_audio snd_timer dell_smbios dcdbas snd e1000e intel_wmi_thunderbolt processor_thermal_device_pci_legacy processor_thermal_device processor_thermal_rfim rfkill pcspkr dell_wmi_descriptor wmi_bmof i2c_i801 soundcore processor_thermal_mbox i2c_smbus processor_thermal_rapl intel_rapl_common mei_me joydev idma64 mei intel_soc_dts_iosf intel_xhci_usb_role_switch intel_pch_thermal intel_hid acpi_pad int3403_thermal int340x_thermal_zone int3400_thermal sparse_keymap acpi_thermal_rel binfmt_misc zram ip_tables i915 rtsx_pci_sdmmc mmc_core hid_alps i2c_algo_bit ttm drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel cec serio_raw drm rtsx_pci
 i2c_hid_acpi i2c_hid wmi video fuse
CR2: 0000000000000050