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: 1723 Comm: Xorg Tainted: G        W         5.10.12-200.fc33.x86_64 #1
Hardware name: Dell Inc. Precision M2800/0JTY19, BIOS A16 10/08/2018
RIP: 0010:radeon_vm_fini+0x135/0x210 [radeon]
Code: e8 60 e7 f4 dd 4c 8b 7d 70 31 f6 49 8b bf 70 01 00 00 e8 ce 4e 51 de 83 f8 fc 0f 85 49 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 72
RSP: 0018:ffff9f2fc153fc40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff89b8c65f2a00 RCX: 0000000000000000
RDX: ffff89b94ab6ce00 RSI: ffff89b8c65f1400 RDI: ffff89b8c65f1420
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffff89b9479f1780 R11: 0000000000000000 R12: ffff89b8c65f1400
R13: ffff89b8cdd40000 R14: ffff89b8c65f1448 R15: dead000000000100
FS:  0000000000000000(0000) GS:ffff89bbdea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000023a10006 CR4: 00000000001706f0
Call Trace:
 radeon_driver_postclose_kms+0x156/0x170 [radeon]
 drm_file_free.part.0+0x21e/0x2a0 [drm]
 drm_release+0x65/0x110 [drm]
 __fput+0x9d/0x240
 task_work_run+0x65/0xa0
 do_exit+0x355/0xab0
 do_group_exit+0x33/0xa0
 get_signal+0x16a/0x880
 arch_do_signal+0x30/0x710
 ? do_send_sig_info+0x6b/0xc0
 ? do_tkill+0x88/0xb0
 exit_to_user_mode_prepare+0xd5/0x140
 syscall_exit_to_user_mode+0x2d/0x190
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f588957c9d5
Code: Unable to access opcode bytes at RIP 0x7f588957c9ab.
RSP: 002b:00007ffe9a1dd570 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
RAX: 0000000000000000 RBX: 00007f58890a0a80 RCX: 00007f588957c9d5
RDX: 0000000000000000 RSI: 00007ffe9a1dd570 RDI: 0000000000000002
RBP: 0000557a1364c890 R08: 0000000000000000 R09: 00007ffe9a1dd570
R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffe9a1dd7d0
R13: 00000000000006c9 R14: 0000557a13628380 R15: 0000557a155cd538
Modules linked in: bnep xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp tun bridge stp llc ccm 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 sunrpc vfat fat iwlmvm mac80211 libarc4 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_intel_dspcfg soundwire_intel intel_rapl_msr btusb soundwire_generic_allocation btrtl soundwire_cadence btbcm snd_hda_codec iwlwifi btintel intel_rapl_common dell_laptop snd_hda_core x86_pkg_temp_thermal intel_powerclamp coretemp snd_hwdep kvm_intel snd_soc_rt5640 snd_soc_rl6231 kvm snd_soc_core bluetooth snd_compress
 uvcvideo snd_pcm_dmaengine ac97_bus ledtrig_audio irqbypass snd_seq dell_wmi dell_smbios videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common mei_hdcp videodev dcdbas ecdh_generic mc snd_seq_device iTCO_wdt intel_pmc_bxt iTCO_vendor_support mei_wdt at24 snd_pcm rapl ppdev dell_smm_hwmon intel_cstate ecc dell_wmi_descriptor joydev sparse_keymap intel_uncore pcspkr snd_timer cfg80211 wmi_bmof dell_rbtn snd lpc_ich rfkill soundcore parport_pc parport i2c_i801 i2c_smbus mei_me mei dell_smo8800 zram ip_tables amdgpu iommu_v2 gpu_sched i915 radeon i2c_algo_bit drm_kms_helper ttm crct10dif_pclmul cec crc32_pclmul crc32c_intel drm sdhci_pci cqhci e1000e sdhci mmc_core ghash_clmulni_intel serio_raw hid_kensington wmi video uas usb_storage fuse
CR2: 0000000000000000