Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 3 PID: 54484 Comm: ThreadPoolForeg Tainted: G         C         6.2.11-300.fc38.x86_64 #1
Hardware name: LENOVO 80TK/LNVNB161216, BIOS 0VCN31WW(V1.15) 06/19/2018
RIP: 0010:radeon_vm_fini+0x171/0x250 [radeon]
Code: 21 49 8b 87 78 02 00 00 4c 89 fa 48 c7 c6 b7 f4 5b c0 4c 89 f3 48 8b 38 e8 7c 41 54 cd 4d 85 f6 75 96 48 8b 45 48 4c 8d 75 48 <48> 8b 10 48 8d 58 a8 4c 8d 6a a8 49 39 c6 74 2e 48 8d 7b 70 e8 36
RSP: 0018:ffffb85906f77c28 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff9f635832a800 RDI: ffff9f635832a820
RBP: ffff9f635832a800 R08: ffff9f630a5f0f28 R09: ffffb85906f77b68
R10: 0000000000000003 R11: 0000000000000001 R12: ffff9f630a5f0000
R13: ffff9f635832a820 R14: ffff9f635832a848 R15: dead000000000100
FS:  0000000000000000(0000) GS:ffff9f6476d80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001d3010005 CR4: 00000000003706e0
Call Trace:
 <TASK>
 radeon_driver_postclose_kms+0x160/0x190 [radeon]
 drm_file_free.part.0+0x204/0x250
 drm_release+0x64/0xd0
 __fput+0x8e/0x250
 task_work_run+0x56/0x90
 do_exit+0x33e/0xb20
 ? hrtimer_cancel+0x11/0x20
 do_group_exit+0x2d/0x80
 get_signal+0x9b0/0x9f0
 arch_do_signal_or_restart+0x3a/0x280
 exit_to_user_mode_prepare+0x18d/0x1f0
 syscall_exit_to_user_mode+0x17/0x40
 do_syscall_64+0x68/0x90
 ? do_syscall_64+0x68/0x90
 ? exit_to_user_mode_prepare+0x13a/0x1f0
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f00fae8bbb4
Code: Unable to access opcode bytes at 0x7f00fae8bb8a.
RSP: 002b:00007f00c3ffd110 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000000000 RCX: 00007f00fae8bbb4
RDX: 0000000000000000 RSI: 0000000000000089 RDI: 00007f00c3ffd368
RBP: 00007f00c3ffd140 R08: 0000000000000000 R09: 00000000ffffffff
R10: 00007f00c3ffd220 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f00c3ffd340 R15: 00007f00c3ffd368
 </TASK>
Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer 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 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink qrtr snd_sof_pci_intel_skl bnep snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils soundwire_bus snd_soc_avs snd_soc_hda_codec snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi snd_hda_codec_hdmi snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_seq binfmt_misc snd_seq_device snd_pcm snd_timer vfat snd btusb fat iwlmvm soundcore btrtl mac80211 r8712u(C)
 btbcm btintel libarc4 uvcvideo ideapad_laptop videobuf2_vmalloc videobuf2_memops intel_rapl_msr intel_rapl_common videobuf2_v4l2 videobuf2_common iwlwifi videodev intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp pcspkr coretemp mc sparse_keymap rapl btmtk platform_profile bluetooth iTCO_wdt intel_pmc_bxt intel_cstate iTCO_vendor_support intel_uncore mei_pxp ee1004 i2c_i801 i2c_smbus cfg80211 mei_hdcp intel_wmi_thunderbolt mei_me rfkill mei intel_pch_thermal intel_xhci_usb_role_switch joydev acpi_pad loop zram amdgpu iommu_v2 gpu_sched i915 radeon r8152 mii rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel polyval_clmulni polyval_generic drm_ttm_helper drm_buddy ghash_clmulni_intel ttm sha512_ssse3 drm_display_helper r8169 rtsx_pci cec video wmi serio_raw ip6_tables ip_tables fuse
CR2: 0000000000000000