Hi,
I have just booted a vanilla 5.14.3 kernel and noticed this in the dmesg log.
This is with a fairly old Radeon R7 360:
02:00.0 0300: 1002:665f (rev 81) (prog-if 00 [VGA controller])
Subsystem: 1682:7360
Flags: bus master, fast devsel, latency 0, IRQ 42
Memory at b0000000 (64-bit, prefetchable) [size=256M]
Memory at cf800000 (64-bit, prefetchable) [size=8M]
I/O ports at ce00 [size=256]
Memory at fbc80000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: amdgpu
Kernel modules: amdgpu
02:00.1 0403: 1002:aac0
Subsystem: 1682:aac0
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at fbcfc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
Cheers,
Chris
[ 122.232938] ------------[ cut here ]------------
[ 122.236497] WARNING: CPU: 4 PID: 1 at
drivers/gpu/drm/ttm/ttm_bo.c:409 ttm_bo_release+0x1c/0x266 [ttm]
[ 122.245484] 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 snd_hda_codec_hdmi
ledtrig_audio snd_hda_intel uvcvideo snd_intel_dspcfg snd_usb_audio
snd_hda_codec btusb snd_hda_core videobuf2_vmalloc snd_usbmidi_lib
videobuf2_memops snd_virtuoso snd_hwdep btbcm snd_oxygen_lib
snd_mpu401_uart videobuf2_v4l2 btintel snd_seq snd_rawmidi
videobuf2_common input_leds bluetooth videodev led_class ecdh_generic
joydev snd_seq_device mc rfkill snd_pcm ecc coretemp kvm_intel r8169
snd_hrtimer kvm
[ 122.245552] snd_timer realtek snd gpio_ich iTCO_wdt mdio_devres
mxm_wmi i2c_i801 irqbypass psmouse libphy tiny_power_button soundcore
lpc_ich i2c_smbus button pcspkr wmi 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 drm_ttm_helper ttm
uhci_hcd mfd_core gpu_sched i2c_algo_bit ahci firewire_ohci
pata_jmicron libahci drm_kms_helper firewire_core xhci_pci libata
ehci_pci cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt
fb_sys_fops ehci_hcd cfbcopyarea cec crc32c_intel crc_itu_t xhci_hcd
serio_raw scsi_mod rc_core drm usbcore usb_common
drm_panel_orientation_quirks msr sha256_ssse3 sha256_generic ipv6
crc_ccitt
[ 122.401389] CPU: 2 PID: 1 Comm: systemd Tainted: G I 5.14.3 #1
[ 122.407508] Hardware name: Gigabyte Technology Co., Ltd.
EX58-UD3R/EX58-UD3R, BIOS FB 05/04/2009
[ 122.415086] RIP: 0010:ttm_bo_release+0x1c/0x266 [ttm]
[ 122.419019] 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
[ 122.437378] RSP: 0018:ffffc90000023e00 EFLAGS: 00010202
[ 122.441459] RAX: 0000000000000001 RBX: ffff88810223f5c8 RCX: 0000000000000001
[ 122.447594] RDX: 000000000000013b RSI: ffffffffa03380db RDI: ffff88810223f5c8
[ 122.453695] RBP: ffff88810b845308 R08: 0000000000000001 R09: 0000000000000003
[ 122.459771] R10: 00000000001d6878 R11: ffff88812675a600 R12: ffff88810223f458
[ 122.465851] R13: ffff88813aff2da0 R14: ffff88814859a0c0 R15: 0000000000000000
[ 122.471931] FS: 00007fb4861a8340(0000) GS:ffff888343c80000(0000)
knlGS:0000000000000000
[ 122.479028] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 122.483683] CR2: 00007f8037604948 CR3: 0000000101ed4000 CR4: 00000000000006e0
[ 122.489775] Call Trace:
[ 122.490939] amdgpu_bo_unref+0x15/0x1e [amdgpu]
[ 122.494527] amdgpu_gem_object_free+0x2b/0x45 [amdgpu]
[ 122.498733] drm_gem_dmabuf_release+0x11/0x1a [drm]
[ 122.502357] dma_buf_release+0x36/0x6e
[ 122.504852] __dentry_kill+0xf5/0x12f
[ 122.507282] dput+0xfc/0x136
[ 122.508924] __fput+0x16a/0x1bc
[ 122.510844] task_work_run+0x64/0x75
[ 122.513178] exit_to_user_mode_prepare+0x88/0x112
[ 122.516724] syscall_exit_to_user_mode+0x14/0x1f
[ 122.520219] do_syscall_64+0x7a/0x80
[ 122.522586] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 122.526510] RIP: 0033:0x7fb486e289db
[ 122.528822] 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 fc ff 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 91 fc ff ff
8b 44
[ 122.546975] RSP: 002b:00007fff4fa2a920 EFLAGS: 00000293 ORIG_RAX:
0000000000000003
[ 122.553586] RAX: 0000000000000000 RBX: 00007fb4861a80f8 RCX: 00007fb486e289db
[ 122.559680] RDX: 0000000000000002 RSI: 000000055e185b46 RDI: 0000000000000068
[ 122.565763] RBP: 0000000000000068 R08: 0000000000000000 R09: 0000000000000000
[ 122.571847] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
[ 122.577932] R13: 000055e1854f6300 R14: 000055e1854b10f9 R15: 000055e185c80130
[ 122.584027] ---[ end trace fe16ae14a1eb3188 ]---