Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000078
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] SMP NOPTI
CPU: 6 PID: 422 Comm: plymouthd Not tainted 5.8.18-100.fc31.x86_64 #1
Hardware name: Dell Inc. Latitude 7400/07WDVW, BIOS 1.5.4 10/03/2019
RIP: 0010:page_remove_rmap+0x29d/0x4b0
Code: 36 48 8b 40 38 48 8b 3c cd a0 1b c6 89 48 85 c0 0f 84 74 01 00 00 0f 1f 44 00 00 48 63 8f c0 a0 02 00 4c 8b 84 c8 48 0b 00 00 <49> 3b 78 78 0f 85 92 01 00 00 be 0f 00 00 00 4c 89 c7 e8 8c 4c 05
RSP: 0018:ffffb27b805f7c88 EFLAGS: 00010286
RAX: ffff9ca32c86e000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: ffff9ca33e7d3000
RBP: ffffe2ea11a13180 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000046003b R11: 0000000000000000 R12: ffffb27b805f7df0
R13: 00007f56685c4000 R14: 00000004684c6025 R15: 00007f56685c3000
FS:  0000000000000000(0000) GS:ffff9ca32e580000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000078 CR3: 000000046183e003 CR4: 00000000003606e0
Call Trace:
 ? __tlb_remove_page_size+0x77/0xb0
 unmap_page_range+0x705/0xee0
 unmap_vmas+0x6a/0xd0
 exit_mmap+0x97/0x170
 mmput+0x61/0x140
 do_exit+0x306/0xb80
 ? syscall_trace_enter+0x160/0x290
 do_group_exit+0x3a/0xa0
 __x64_sys_exit_group+0x14/0x20
 do_syscall_64+0x4d/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f56686334a6
Code: Unable to access opcode bytes at RIP 0x7f566863347c.
RSP: 002b:00007ffca9f10578 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f5668729470 RCX: 00007f56686334a6
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffff80
R10: 00007f56683a184e R11: 0000000000000246 R12: 00007f5668729470
R13: 0000000000000001 R14: 00007f566872ce68 R15: 0000000000000000
Modules linked in: xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter cmac bnep tun sunrpc vfat fat snd_hda_codec_hdmi snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_xtensa_dsp dell_rbtn snd_sof_intel_hda snd_sof snd_soc_skl snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core snd_hda_codec_realtek snd_compress snd_hda_codec_generic ac97_bus snd_pcm_dmaengine snd_hda_intel snd_intel_dspcfg snd_hda_codec iTCO_wdt intel_pmc_bxt x86_pkg_temp_thermal ee1004
 iTCO_vendor_support intel_powerclamp snd_hda_core coretemp snd_hwdep snd_seq snd_seq_device iwlmvm kvm_intel dell_laptop mei_hdcp ledtrig_audio intel_rapl_msr kvm snd_pcm btusb mac80211 dell_smm_hwmon btrtl irqbypass btbcm btintel snd_timer dell_wmi rapl uvcvideo dell_smbios libarc4 intel_cstate videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 i2c_i801 dcdbas intel_uncore iwlwifi bluetooth pcspkr snd wmi_bmof videobuf2_common i2c_smbus intel_wmi_thunderbolt dell_wmi_descriptor soundcore mei_me cfg80211 thunderbolt videodev ecdh_generic mei ucsi_acpi processor_thermal_device mc ecc joydev idma64 typec_ucsi intel_rapl_common rfkill intel_pch_thermal intel_soc_dts_iosf typec int3403_thermal int340x_thermal_zone int3400_thermal intel_hid acpi_pad acpi_thermal_rel sparse_keymap ip_tables dm_crypt i915 hid_multitouch rtsx_pci_sdmmc mmc_core crct10dif_pclmul i2c_algo_bit crc32_pclmul crc32c_intel drm_kms_helper nvme ghash_clmulni_intel cec nvme_core drm serio_raw rtsx_pci wmi
 i2c_hid video pinctrl_cannonlake pinctrl_intel fuse
CR2: 0000000000000078