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: 1 PID: 2705 Comm: Chrome_ChildIOT Not tainted 5.16.13-200.fc35.x86_64 #1
Hardware name: Dell Inc. Latitude E6440/040KRG, BIOS A10 02/02/2015
RIP: 0010:radeon_vm_fini+0x148/0x230 [radeon]
Code: e8 dd fa f6 d5 4c 8b 7d 70 31 f6 49 8b bf 70 01 00 00 e8 9b 56 5b d6 83 f8 fc 0f 85 36 ff ff ff 49 8b 44 24 48 4d 8d 74 24 48 <48> 8b 10 48 8d 68 a8 48 8d 5a a8 49 39 c6 74 2e 48 8d 7d 70 e8 6f
RSP: 0018:ffffb2b8015a7c48 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9cd4c01b9400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff9cd4c01b9c00 RDI: ffff9cd4c01b9c20
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff9cd448b5cf18
R10: 0000000000000378 R11: 0000000000000000 R12: ffff9cd4c01b9c00
R13: ffff9cd448b5c000 R14: ffff9cd4c01b9c48 R15: dead000000000100
FS:  0000000000000000(0000) GS:ffff9cd566a80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001a2e10003 CR4: 00000000001706e0
Call Trace:
 <TASK>
 radeon_driver_postclose_kms+0x169/0x180 [radeon]
 drm_file_free.part.0+0x206/0x250 [drm]
 drm_release+0x65/0x110 [drm]
 __fput+0x94/0x250
 task_work_run+0x5c/0x90
 do_exit+0x364/0xb40
 do_group_exit+0x33/0xa0
 get_signal+0xaf/0x9c0
 ? preempt_count_add+0x68/0xa0
 arch_do_signal_or_restart+0x109/0x740
 ? do_wait_intr_irq+0xa0/0xa0
 exit_to_user_mode_prepare+0x119/0x230
 syscall_exit_to_user_mode+0x18/0x40
 do_syscall_64+0x48/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fccbbbaac2e
Code: Unable to access opcode bytes at RIP 0x7fccbbbaac04.
RSP: 002b:00007fcc9f6f0440 EFLAGS: 00000293 ORIG_RAX: 00000000000000e8
RAX: fffffffffffffffc RBX: 0000091e003b7f00 RCX: 00007fccbbbaac2e
RDX: 0000000000000020 RSI: 0000091e002df780 RDI: 0000000000000023
RBP: 00007fcc9f6f04a0 R08: 0000000000000000 R09: 00007fcc9eeef4e0
R10: 00000000ffffffff R11: 0000000000000293 R12: 0000091e003b7f00
R13: 0000091e00869e60 R14: 0000091e002df780 R15: 0000000000000000
 </TASK>
Modules linked in: uinput 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 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink qrtr bnep sunrpc vfat fat intel_rapl_msr intel_rapl_common at24 dell_laptop iTCO_wdt lis3lv02d_i2c lis3lv02d x86_pkg_temp_thermal intel_powerclamp intel_pmc_bxt mei_wdt iTCO_vendor_support coretemp mei_hdcp mei_pxp dell_smm_hwmon kvm_intel ppdev iwldvm kvm mac80211 btusb irqbypass btrtl uvcvideo rapl libarc4 btbcm videobuf2_vmalloc intel_cstate videobuf2_memops btintel videobuf2_v4l2 bluetooth intel_uncore snd_soc_rt5640 dell_wmi snd_ctl_led snd_hda_codec_realtek iwlwifi snd_soc_rl6231 snd_hda_codec_generic snd_soc_core ledtrig_audio videobuf2_common snd_hda_codec_hdmi sparse_keymap ecdh_generic videodev dell_smbios snd_hda_intel dcdbas snd_compress joydev pcspkr
 snd_intel_dspcfg wmi_bmof snd_intel_sdw_acpi ac97_bus dell_wmi_descriptor i2c_i801 cfg80211 i2c_smbus mc snd_pcm_dmaengine snd_hda_codec mei_me snd_seq snd_hda_core lpc_ich snd_seq_device snd_hwdep mei snd_pcm snd_timer parport_pc snd dell_rbtn parport soundcore dell_smo8800 rfkill zram ip_tables amdgpu iommu_v2 gpu_sched i915 radeon crct10dif_pclmul crc32_pclmul crc32c_intel drm_ttm_helper sdhci_pci i2c_algo_bit cqhci ttm sdhci drm_kms_helper ghash_clmulni_intel mmc_core serio_raw cec e1000e drm wmi video ipmi_devintf ipmi_msghandler fuse
CR2: 0000000000000000