Hi.
I've already tried reporting this on the linux kernel list, without effect:
[ 95.796055] ------------[ cut here ]------------ [ 95.819648] WARNING: CPU: 3 PID: 1 at drivers/gpu/drm/ttm/ttm_bo.c:409 ttm_bo_release+0x1c/0x266 [ttm] [ 95.827805] Modules linked in: nf_nat_ftp nf_conntrack_ftp cfg80211 af_packet 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 nf_tables ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c iptable_mangle iptable_raw iptable_security nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter bnep it87 hwmon_vid dm_mod dax snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel btusb uvcvideo btbcm btintel videobuf2_vmalloc bluetooth videobuf2_memops videobuf2_v4l2 videobuf2_common videodev ecdh_generic rfkill ecc snd_usb_audio snd_usbmidi_lib snd_intel_dspcfg snd_hda_codec mc snd_hwdep coretemp snd_virtuoso snd_oxygen_lib kvm_intel snd_hda_core input_leds snd_mpu401_uart kvm snd_rawmidi led_class r8169 snd_seq joydev irqbypass snd_seq_device snd_pcm [ 95.827905] snd_hrtimer snd_timer realtek gpio_ich mxm_wmi iTCO_wdt mdio_devres snd libphy wmi soundcore lpc_ich tiny_power_button psmouse pcspkr i2c_i801 i2c_smbus button i7core_edac acpi_cpufreq nfsd auth_rpcgss nfs_acl binfmt_misc lockd grace sunrpc fuse configfs zram zsmalloc ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 hid_microsoft usbhid sr_mod cdrom sd_mod amdgpu uhci_hcd drm_ttm_helper ttm mfd_core gpu_sched i2c_algo_bit drm_kms_helper cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt fb_sys_fops cfbcopyarea cec xhci_pci rc_core ehci_pci drm ehci_hcd firewire_ohci pata_jmicron xhci_hcd ahci libahci crc32c_intel firewire_core libata crc_itu_t serio_raw scsi_mod usbcore usb_common drm_panel_orientation_quirks ipmi_devintf ipmi_msghandler msr sha256_ssse3 sha256_generic ipv6 crc_ccitt [ 95.986940] CPU: 7 PID: 1 Comm: systemd Tainted: G I 5.14.20 #1 [ 95.993114] Hardware name: Gigabyte Technology Co., Ltd. EX58-UD3R/EX58-UD3R, BIOS FB 05/04/2009 [ 96.001000] RIP: 0010:ttm_bo_release+0x1c/0x266 [ttm] [ 96.004945] Code: 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 56 41 55 41 54 4c 8d a7 90 fe ff ff 55 53 83 7f 4c 00 48 89 fb 48 8b 6f e8 74 02 <0f> 0b 80 7b 18 00 48 8b 43 88 0f 85 ac 00 00 00 4c 8d 6b 90 49 39 [ 96.023154] RSP: 0018:ffffc90000023e00 EFLAGS: 00010202 [ 96.027128] RAX: 0000000000000001 RBX: ffff888105ac0dc8 RCX: 0000000000000292 [ 96.033077] RDX: 0000000000000420 RSI: ffffffffa03010db RDI: ffff888105ac0dc8 [ 96.039021] RBP: ffff88810bd05308 R08: 0000000000000001 R09: 0000000000000003 [ 96.045104] R10: ffff8881274e5e00 R11: ffff8881274e5e00 R12: ffff888105ac0c58 [ 96.051172] R13: ffff888135fe0ff8 R14: ffff88812693d540 R15: 0000000000000000 [ 96.057195] FS: 00007ff7c578cb40(0000) GS:ffff888343dc0000(0000) knlGS:0000000000000000 [ 96.064276] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.068851] CR2: 00007f2f9152e948 CR3: 00000001008de000 CR4: 00000000000006e0 [ 96.074936] Call Trace: [ 96.076091] <TASK> [ 96.076903] amdgpu_bo_unref+0x15/0x1e [amdgpu] [ 96.080419] amdgpu_gem_object_free+0x2b/0x45 [amdgpu] [ 96.084505] drm_gem_dmabuf_release+0x11/0x1a [drm] [ 96.088205] dma_buf_release+0x36/0x7d [ 96.090760] __dentry_kill+0xf5/0x12f [ 96.093250] dput+0xfc/0x136 [ 96.094913] __fput+0x16a/0x1bc [ 96.096820] task_work_run+0x64/0x75 [ 96.099202] exit_to_user_mode_prepare+0x88/0x112 [ 96.102679] syscall_exit_to_user_mode+0x14/0x1f [ 96.105996] do_syscall_64+0x7a/0x80 [ 96.108276] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 96.112030] RIP: 0033:0x7ff7c62c2fdb [ 96.114309] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 33 81 f8 ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 81 81 f8 ff 8b 44 [ 96.131760] RSP: 002b:00007fff0b56d3f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 96.138100] RAX: 0000000000000000 RBX: 00007ff7c578c8f0 RCX: 00007ff7c62c2fdb [ 96.143944] RDX: 0000000000000000 RSI: 0000000556cdb0cc RDI: 0000000000000069 [ 96.149859] RBP: 0000000000000069 R08: 0000000000000000 R09: 000000000000007f [ 96.155751] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 96.161679] R13: 0000556cda037680 R14: 0000556cd9ff0719 R15: 0000556cdb0cb480 [ 96.167643] </TASK> [ 96.168544] ---[ end trace 9ff3687327d73ce2 ]---
Cheers, Chris