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: 2 PID: 178786 Comm: Chrome_ChildIOT Not tainted 6.3.4-201.fc38.x86_64 #1
Hardware name: LENOVO 20ET0005UE/20ET0005UE, BIOS R00ET44W (1.19 ) 05/12/2016
RIP: 0010:radeon_vm_fini+0x175/0x260 [radeon]
Code: 21 49 8b 87 88 02 00 00 4c 89 fa 48 c7 c6 1e c5 86 c0 4c 89 f3 48 8b 38 e8 68 c9 2b d6 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 b2
RSP: 0018:ffffba180e747c50 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffa0348cead538
RDX: 0000000000000000 RSI: ffffa03534955200 RDI: ffffa03534955220
RBP: ffffa03534955200 R08: ffffa0348ccf4f18 R09: ffffba180e747b90
R10: 0000000000000003 R11: 0000000000000001 R12: ffffa0348ccf4000
R13: ffffa03534955220 R14: ffffa03534955248 R15: dead000000000100
FS:  0000000000000000(0000) GS:ffffa035bab00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000019a022004 CR4: 00000000003706e0
Call Trace:
 <TASK>
 radeon_driver_postclose_kms+0x164/0x190 [radeon]
 drm_file_free+0x219/0x270
 drm_release+0x74/0xf0
 __fput+0x8e/0x250
 task_work_run+0x5a/0x90
 do_exit+0x342/0xb10
 ? schedule_hrtimeout_range_clock+0x134/0x140
 do_group_exit+0x31/0x80
 get_signal+0x9a5/0x9e0
 ? do_epoll_wait+0xb2/0x7a0
 arch_do_signal_or_restart+0x3e/0x270
 exit_to_user_mode_prepare+0x195/0x1f0
 syscall_exit_to_user_mode+0x1b/0x40
 do_syscall_64+0x6c/0x90
 ? do_syscall_64+0x6c/0x90
 ? do_syscall_64+0x6c/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f0c61734c72
Code: Unable to access opcode bytes at 0x7f0c61734c48.
RSP: 002b:00007f0c37ffda90 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8
RAX: fffffffffffffffc RBX: 0000035000c20e00 RCX: 00007f0c61734c72
RDX: 0000000000000010 RSI: 00007f0c37ffdac0 RDI: 0000000000000024
RBP: 00007f0c37ffdab0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000293 R12: 7fffffffffffffff
R13: aaaaaaaaaaaaaaaa R14: 0000035000c20e00 R15: 00007f0c37ffdac0
 </TASK>
Modules linked in: xt_REDIRECT xt_addrtype bnep snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat ip6table_filter iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bridge stp llc qrtr snd_sof_pci_intel_skl 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 sunrpc snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match binfmt_misc snd_soc_acpi snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_codec_hdmi snd_ctl_led intel_rapl_msr intel_rapl_common snd_hda_codec_conexant snd_hda_codec_generic intel_tcc_cooling x86_pkg_temp_thermal snd_hda_intel intel_powerclamp coretemp snd_intel_dspcfg snd_intel_sdw_acpi kvm_intel snd_hda_codec kvm snd_hda_core uvcvideo uvc videobuf2_vmalloc videobuf2_memops
 videobuf2_v4l2 videobuf2_common videodev snd_hwdep mc btusb btrtl btbcm btintel btmtk bluetooth snd_seq irqbypass thinkpad_acpi mei_hdcp rapl iwlmvm intel_cstate intel_uncore pcspkr mei_pxp snd_seq_device at24 snd_pcm ledtrig_audio snd_timer mac80211 platform_profile libarc4 iwlwifi cfg80211 rfkill intel_xhci_usb_role_switch i2c_i801 mei_me snd soundcore mei intel_pch_thermal i2c_smbus joydev think_lmi firmware_attributes_class wmi_bmof squashfs loop zram amdgpu iommu_v2 gpu_sched i915 radeon rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel e1000e polyval_clmulni polyval_generic ghash_clmulni_intel drm_ttm_helper drm_buddy sha512_ssse3 rtsx_pci ttm wdat_wdt i2c_algo_bit drm_display_helper video cec wmi serio_raw scsi_dh_rdac scsi_dh_emc scsi_dh_alua ip6_tables ip_tables dm_multipath fuse
CR2: 0000000000000000