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 [#2] SMP PTI
CPU: 3 PID: 1988 Comm: gdbus Tainted: G      D W         5.11.12-300.fc34.x86_64 #1
Hardware name: Dell Inc. Vostro 2520/0V1NDP, BIOS A11 02/24/2014
RIP: 0010:vma_interval_tree_remove+0x149/0x2c0
Code: 89 39 48 89 10 48 85 c0 0f 84 84 00 00 00 48 8b 48 10 48 8b 70 08 31 ff eb 18 48 89 50 18 48 8b 10 48 83 e2 fc 48 89 d0 74 43 <48> 8b 4a 10 48 8b 72 08 48 8b 50 b0 4c 8b 40 40 48 2b 50 a8 48 c1
RSP: 0018:ffffae9b43d73c48 EFLAGS: 00010202
RAX: 0000000000000040 RBX: ffffa0440fbdd3e8 RCX: 0000000000000040
RDX: 0000000000000040 RSI: ffffa043d995d440 RDI: 0000000000000000
RBP: ffffa043d5ae3418 R08: ffffa043d887b320 R09: 0000000000000000
R10: ffffa0440a4079c0 R11: 0000000000000000 R12: ffffa0440fbdd440
R13: ffffa043d5ae3428 R14: ffffa043d5ae33f8 R15: ffffa04410681c80
FS:  0000000000000000(0000) GS:ffffa044d7380000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000050 CR3: 0000000054a10004 CR4: 00000000001706e0
Call Trace:
 unlink_file_vma+0x3d/0x60
 free_pgtables+0x9b/0x100
 exit_mmap+0xa6/0x1c0
 mmput+0x61/0x140
 do_exit+0x30c/0xac0
 ? _copy_to_iter+0x91/0x380
 ? try_to_wake_up+0x53/0x4f0
 ? reweight_entity+0x128/0x140
 do_group_exit+0x33/0xa0
 get_signal+0x14f/0x8a0
 arch_do_signal_or_restart+0xf2/0x700
 ? vfs_read+0x172/0x1a0
 exit_to_user_mode_prepare+0xde/0x1b0
 syscall_exit_to_user_mode+0x18/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f9e717c09ff
Code: Unable to access opcode bytes at RIP 0x7f9e717c09d5.
RSP: 002b:00007f9e620fcb80 EFLAGS: 00000293 ORIG_RAX: 0000000000000007
RAX: fffffffffffffdfc RBX: 00007f9e71962071 RCX: 00007f9e717c09ff
RDX: 00000000ffffffff RSI: 0000000000000002 RDI: 00005611f6ab23b0
RBP: 00005611f6ab23b0 R08: 0000000000000000 R09: 00007f9e620fca10
R10: 00007ffe6c90c080 R11: 0000000000000293 R12: 0000000000000002
R13: 0000000000000002 R14: 00007f9e620fcbf0 R15: 00005611f6a9c220
Modules linked in: uinput snd_seq_dummy snd_hrtimer rfcomm 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 intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic coretemp snd_hda_intel snd_intel_dspcfg kvm_intel soundwire_intel soundwire_generic_allocation snd_soc_core kvm btusb snd_compress uvcvideo btrtl snd_pcm_dmaengine btbcm btintel irqbypass soundwire_cadence videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 bluetooth videobuf2_common snd_hda_codec snd_hda_core videodev ac97_bus snd_hwdep ecdh_generic rapl
 mei_hdcp dell_laptop mc ledtrig_audio rfkill snd_seq ecc iTCO_wdt intel_cstate intel_pmc_bxt snd_seq_device dell_smm_hwmon snd_pcm iTCO_vendor_support at24 intel_uncore snd_timer dell_wmi snd dell_smbios dcdbas soundcore sparse_keymap bcma joydev wmi_bmof dell_wmi_descriptor i2c_i801 mei_me lpc_ich mei i2c_smbus pcspkr zram ip_tables i915 ums_realtek uas usb_storage crct10dif_pclmul crc32_pclmul i2c_algo_bit crc32c_intel drm_kms_helper cec ghash_clmulni_intel drm serio_raw r8169 wmi video rndis_host cdc_ether usbnet mii fuse
CR2: 0000000000000050