Backtrace

WARNING: CPU: 1 PID: 2796 at drivers/gpu/drm/radeon/radeon_object.c:83 radeon_ttm_bo_destroy+0xde/0xf0 [radeon]
Modules linked in: rfcomm snd_seq_dummy snd_hrtimer qrtr ns ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt ipt_REJECT nf_reject_ipv4 xt_LOG nf_log_syslog vmnet(O) xt_comment ppdev parport xt_limit xt_addrtype vmw_vsock_vmci_transport bnep vsock xt_conntrack vmw_vmci 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 rtsx_usb_ms memstick btusb btrtl videobuf2_vmalloc btbcm videobuf2_memops btintel videobuf2_v4l2 videobuf2_common bluetooth videodev mc ecdh_generic intel_rapl_msr iwlmvm iTCO_wdt intel_pmc_bxt iTCO_vendor_support at24 mac80211 mei_hdcp snd_soc_skl snd_hda_codec_hdmi intel_rapl_common snd_soc_hdac_hda snd_hda_ext_core libarc4 intel_tcc_cooling snd_soc_sst_ipc x86_pkg_temp_thermal intel_powerclamp snd_soc_sst_dsp snd_soc_acpi_intel_match snd_ctl_led snd_soc_acpi snd_soc_core coretemp snd_compress ac97_bus snd_hda_codec_realtek
 kvm_intel snd_pcm_dmaengine snd_hda_codec_generic dell_laptop dell_smm_hwmon snd_hda_intel iwlwifi kvm snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep irqbypass rapl intel_cstate snd_seq cfg80211 snd_seq_device intel_uncore snd_pcm dell_wmi ledtrig_audio dell_smbios snd_timer i2c_i801 dcdbas wmi_bmof sparse_keymap snd dell_wmi_descriptor i2c_smbus pcspkr mei_me soundcore joydev mei intel_xhci_usb_role_switch intel_pch_thermal idma64 dell_rbtn rfkill acpi_pad ipmi_devintf ipmi_msghandler zram ip_tables xfs dm_crypt trusted asn1_encoder amdgpu iommu_v2 gpu_sched i915 radeon rtsx_usb_sdmmc hid_multitouch mmc_core i2c_algo_bit crct10dif_pclmul drm_ttm_helper ttm crc32_pclmul crc32c_intel drm_kms_helper cec ghash_clmulni_intel drm r8169 serio_raw rtsx_usb wmi i2c_hid_acpi i2c_hid video pinctrl_sunrisepoint fuse [last unloaded: parport_pc]
CPU: 1 PID: 2796 Comm: Xorg Tainted: G        W 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 39 ee ff 48 89 ef e8 20 42 ed ff 4c 89 e7 5b 5d 41 5c 41 5d e9 f2 d6 f8 ef <0f> 0b eb cd 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f 1f 44 00
RSP: 0018:ffffbe3702157d20 EFLAGS: 00010283
RAX: ffff98b2ca317670 RBX: ffffffffffffffff RCX: 0000000000000000
RDX: ffff98b2bcfa7780 RSI: ffff98b2ca317400 RDI: ffff98b28b851ca8
RBP: ffff98b2ca317478 R08: ffff98b28b851cc8 R09: 0000000000000000
R10: ffff98b2e1440b00 R11: 0000000000000000 R12: ffff98b2ca317400
R13: ffff98b28349ab30 R14: ffff98b28349aa40 R15: ffff98b2a3a204b8
FS:  0000000000000000(0000) GS:ffff98b5f2c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc070071e90 CR3: 00000002eee4e002 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: 0033:0x7fc076375541
Code: Unable to access opcode bytes at RIP 0x7fc076375517.
RSP: 002b:00007fff323e11b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fc076494510 RCX: 00007fc076375541
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: fffffffffffffc80 R09: 0000000000000000
R10: 00007fc0762a1e88 R11: 0000000000000246 R12: 00007fc076494510
R13: 0000000000000000 R14: 00007fc0764949e8 R15: 00007fc076494a00