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] SMP PTI
CPU: 0 PID: 523469 Comm: chrome:disk$0 Tainted: G          I       5.14.9-100.fc33.x86_64 #1
Hardware name: Dell Inc. Inspiron 5559/0K64R6, BIOS 1.1.5 12/21/2015
RIP: 0010:radeon_vm_fini+0x14a/0x220 [radeon]
Code: e8 4b 48 09 de 4c 8b 7d 70 31 f6 49 8b bf 70 01 00 00 e8 79 37 68 de 83 f8 fc 0f 85 34 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 ad
RSP: 0018:ffff9e8480ff7c48 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff90b909899c00 RCX: 0000000000000000
RDX: ffff90ba9d3ed080 RSI: ffff90b909898a00 RDI: ffff90b909898a20
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff9e8480ff7b90
R10: 0000000000000000 R11: 0000000000000001 R12: ffff90b909898a00
R13: ffff90b90d82c000 R14: ffff90b909898a48 R15: dead000000000100
FS:  0000000000000000(0000) GS:ffff90bc72c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000307c10006 CR4: 00000000003706f0
Call Trace:
 radeon_driver_postclose_kms+0x16b/0x180 [radeon]
 drm_file_free.part.0+0x1fb/0x260 [drm]
 drm_release+0x65/0x110 [drm]
 __fput+0x94/0x240
 task_work_run+0x65/0xa0
 do_exit+0x33e/0xaa0
 do_group_exit+0x33/0xa0
 get_signal+0x170/0x890
 arch_do_signal_or_restart+0xfd/0x730
 ? kmem_cache_free+0xef/0x3f0
 ? mntput_no_expire+0x37/0x250
 exit_to_user_mode_prepare+0x11a/0x240
 syscall_exit_to_user_mode+0x18/0x40
 do_syscall_64+0x48/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f786cbb5692
Code: Unable to access opcode bytes at RIP 0x7f786cbb5668.
RSP: 002b:00007f7851beb5c0 EFLAGS: 00000282 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 0000000000000030 RCX: 00007f786cbb5692
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00002ca8001295c8
RBP: 00002ca8001295a0 R08: 0000000000000000 R09: 00002ca8030ec060
R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000
R13: 00002ca800129578 R14: 00002ca8001295c8 R15: 00007f7851beb5f0
Modules linked in: uas usb_storage rfcomm xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter tun bridge stp llc snd_hda_codec_hdmi snd_soc_skl binfmt_misc bnep 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_soc_core snd_ctl_led snd_hda_codec_realtek snd_compress snd_hda_codec_generic ac97_bus snd_pcm_dmaengine intel_rapl_msr snd_hda_intel intel_rapl_common snd_intel_dspcfg snd_intel_sdw_acpi intel_tcc_cooling iwlmvm x86_pkg_temp_thermal snd_hda_codec mac80211 snd_hda_core intel_powerclamp sunrpc libarc4 coretemp snd_hwdep snd_seq kvm_intel iTCO_wdt mei_hdcp intel_pmc_bxt snd_seq_device iTCO_vendor_support at24 uvcvideo snd_pcm kvm iwlwifi dell_laptop videobuf2_vmalloc dell_smm_hwmon videobuf2_memops videobuf2_v4l2 vfat videobuf2_common
 fat irqbypass rapl btusb intel_cstate cfg80211 intel_uncore btrtl videodev btbcm btintel snd_timer bluetooth dell_wmi snd rtsx_usb_ms ledtrig_audio memstick dell_smbios dcdbas sparse_keymap wmi_bmof pcspkr dell_wmi_descriptor soundcore mc mei_me i2c_i801 i2c_smbus joydev mei ecdh_generic intel_xhci_usb_role_switch intel_pch_thermal idma64 dell_rbtn rfkill acpi_pad zram ip_tables amdgpu iommu_v2 gpu_sched i915 radeon rtsx_usb_sdmmc mmc_core hid_multitouch drm_ttm_helper crct10dif_pclmul crc32_pclmul i2c_algo_bit crc32c_intel ttm drm_kms_helper ghash_clmulni_intel cec r8169 serio_raw drm rtsx_usb wmi i2c_hid_acpi i2c_hid video pinctrl_sunrisepoint fuse
CR2: 0000000000000000