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: 3 PID: 74417 Comm: firefox:disk$1 Tainted: G          I       5.10.11-200.fc33.x86_64 #1
Hardware name: LENOVO 80E4/Lenovo G40-80, BIOS B0CN95WW 08/03/2015
RIP: 0010:radeon_vm_fini+0x135/0x210 [radeon]
Code: e8 00 67 20 cf 4c 8b 7d 70 31 f6 49 8b bf 70 01 00 00 e8 de ce 7c cf 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:ffffb2edc58afc40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9b8f9601e800 RCX: 0000000000000000
RDX: ffff9b8f13a54e00 RSI: ffff9b8f9601f000 RDI: ffff9b8f9601f020
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000026c R11: 0000000000000000 R12: ffff9b8f9601f000
R13: ffff9b8f8bcac000 R14: ffff9b8f9601f048 R15: dead000000000100
FS:  0000000000000000(0000) GS:ffff9b90d6d80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000056f3a005 CR4: 00000000003726e0
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+0x328/0xa80
 do_group_exit+0x33/0xa0
 get_signal+0x16a/0x880
 arch_do_signal+0x30/0x710
 ? set_next_task_fair+0x30/0xe0
 ? __check_object_size+0x46/0x150
 exit_to_user_mode_prepare+0xd5/0x140
 syscall_exit_to_user_mode+0x2d/0x190
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7efd0d2e36c2
Code: Unable to access opcode bytes at RIP 0x7efd0d2e3698.
RSP: 002b:00007efce61acbc0 EFLAGS: 00000282 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 0000000000000002 RCX: 00007efd0d2e36c2
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efcf393e168
RBP: 00007efcf393e140 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000
R13: 00007efcf393e118 R14: 00007efcf393e168 R15: 00007efce61acbf0
Modules linked in: uinput rfcomm vhost_net vhost vhost_iotlb tap 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 uvcvideo videobuf2_vmalloc cmac videobuf2_memops bnep videobuf2_v4l2 videobuf2_common videodev mc btusb btrtl btbcm btintel bluetooth ecdh_generic ecc rtsx_usb_ms memstick sunrpc intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_conexant snd_hda_codec_generic kvm_intel ledtrig_audio iwlmvm snd_hda_codec_hdmi snd_hda_intel at24 mei_hdcp iTCO_wdt mac80211
 intel_pmc_bxt iTCO_vendor_support kvm snd_intel_dspcfg soundwire_intel vfat fat squashfs libarc4 soundwire_generic_allocation snd_soc_core iwlwifi irqbypass snd_compress snd_pcm_dmaengine soundwire_cadence loop rapl intel_cstate snd_hda_codec snd_hda_core intel_uncore ac97_bus snd_hwdep cfg80211 snd_seq joydev snd_seq_device snd_pcm i2c_i801 pcspkr i2c_smbus mei_me snd_timer mei ideapad_laptop snd lpc_ich sparse_keymap soundcore rfkill wmi acpi_pad zram ip_tables amdgpu iommu_v2 gpu_sched i915 radeon i2c_algo_bit hid_logitech_hidpp drm_kms_helper rtsx_usb_sdmmc mmc_core crct10dif_pclmul cec crc32_pclmul crc32c_intel ttm drm ghash_clmulni_intel serio_raw r8169 hid_logitech_dj rtsx_usb video fuse
CR2: 0000000000000000