Backtrace

WARNING: CPU: 2 PID: 2839 at drivers/gpu/drm/radeon/radeon_object.c:83 radeon_ttm_bo_destroy+0xde/0xf0 [radeon]
Modules linked in: binfmt_misc rfcomm snd_seq_dummy snd_hrtimer qrtr ns ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt vmnet(O) ipt_REJECT ppdev nf_reject_ipv4 parport_pc xt_LOG nf_log_syslog parport vmw_vsock_vmci_transport xt_comment vsock bnep xt_limit vmw_vmci xt_addrtype xt_conntrack vmmon(O) ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter sunrpc vfat fat uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 rtsx_usb_ms memstick videobuf2_common videodev btusb btrtl btbcm btintel bluetooth mc ecdh_generic snd_soc_skl 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_hda_codec_hdmi intel_rapl_msr intel_rapl_common intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp coretemp snd_ctl_led kvm_intel iwlmvm snd_hda_codec_realtek snd_hda_codec_generic snd_compress ac97_bus mac80211
 snd_pcm_dmaengine snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec dell_laptop at24 dell_smm_hwmon kvm iTCO_wdt libarc4 mei_hdcp intel_pmc_bxt iTCO_vendor_support irqbypass iwlwifi snd_hda_core rapl snd_hwdep snd_seq intel_cstate cfg80211 snd_seq_device snd_pcm intel_uncore dell_wmi ledtrig_audio dell_smbios dcdbas wmi_bmof sparse_keymap dell_wmi_descriptor pcspkr i2c_i801 snd_timer snd i2c_smbus soundcore mei_me mei joydev idma64 intel_xhci_usb_role_switch intel_pch_thermal acpi_pad dell_rbtn rfkill ipmi_devintf ipmi_msghandler zram ip_tables xfs dm_crypt trusted asn1_encoder amdgpu iommu_v2 gpu_sched i915 radeon hid_multitouch rtsx_usb_sdmmc mmc_core i2c_algo_bit drm_ttm_helper ttm drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel serio_raw cec ghash_clmulni_intel drm r8169 rtsx_usb i2c_hid_acpi wmi i2c_hid video pinctrl_sunrisepoint fuse
CPU: 2 PID: 2839 Comm: Xorg Tainted: G          IO      5.14.9-200.fc34.x86_64 #1
Hardware name: Dell Inc. Inspiron 5759/05NVNV, BIOS 1.7.0 05/10/2019
RIP: 0010:radeon_ttm_bo_destroy+0xde/0xf0 [radeon]
Code: 00 00 00 74 0f 48 8b b5 b0 01 00 00 48 89 ef e8 f8 b9 ed ff 48 89 ef e8 20 c2 ec ff 4c 89 e7 5b 5d 41 5c 41 5d e9 f2 46 ea c3 <0f> 0b eb cd 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f 1f 44 00
RSP: 0018:ffff990f81a9fd20 EFLAGS: 00010202
RAX: ffff8de602f3a670 RBX: ffffffffffffffff RCX: 0000000000000000
RDX: ffff8de636015480 RSI: ffff8de602f3a400 RDI: ffff8de60b92dca8
RBP: ffff8de602f3a478 R08: ffff8de60b92dcc8 R09: 0000000000000000
R10: ffff8de657af4f00 R11: 0000000000000001 R12: ffff8de602f3a400
R13: ffff8de6361c7d30 R14: ffff8de6361c7c40 R15: ffff8de623646dc8
FS:  0000000000000000(0000) GS:ffff8de972d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48aa6f8000 CR3: 00000001578aa004 CR4: 00000000003706e0
Call Trace:
 radeon_bo_unref+0x1a/0x30 [radeon]
 radeon_gem_object_free+0x20/0x30 [radeon]
 drm_gem_object_release_handle+0x6b/0x80 [drm]
 ? drm_gem_object_handle_put_unlocked+0xd0/0xd0 [drm]
 idr_for_each+0x4e/0xc0
 drm_gem_release+0x1c/0x30 [drm]
 drm_file_free.part.0+0x1e3/0x250 [drm]
 drm_release+0x65/0x110 [drm]
 __fput+0x94/0x240
 task_work_run+0x65/0xa0
 do_exit+0x33d/0xa90
 do_group_exit+0x33/0xa0
 __x64_sys_exit_group+0x14/0x20
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4681cf5561
Code: Unable to access opcode bytes at RIP 0x7f4681cf5537.
RSP: 002b:00007fffbc716e48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4681e14510 RCX: 00007f4681cf5561
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: fffffffffffffc78 R09: 0000000000000000
R10: 00007f4681c21e88 R11: 0000000000000246 R12: 00007f4681e14510
R13: 0000000000000000 R14: 00007f4681e149e8 R15: 00007f4681e14a00