Comment 3 for bug 1797296

Jan 7 02:41:41 ceo1homenx kernel: [40698.439354] WARNING: CPU: 6 PID: 24218 at drivers/gpu/drm/nouveau/nvif/vmm.c:71 nvif_vmm_put+0x6d/0x80 [nouveau]
Jan 7 02:41:41 ceo1homenx kernel: [40698.439355] Modules linked in: vfio_pci vfio_virqfd vfio_iommu_type1 vfio rfcomm ebtable_filter ebtables ip6table_filter devlink ip6_tables iptable_filter bpfilter cmac bnep bridge stp llc dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm wmi_bmof dell_smbios dell_wmi_descriptor irqbypass uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common crct10dif_pclmul crc32_pclmul videodev ghash_clmulni_intel pcbc media joydev aesni_intel dcdbas snd_hda_codec_hdmi input_leds snd_hda_codec_realtek snd_hda_codec_generic aes_x86_64 nouveau snd_usb_audio snd_hda_intel snd_usbmidi_lib snd_hda_codec crypto_simd cryptd snd_hda_core snd_hwdep glue_helper snd_pcm i915 snd_seq_midi snd_seq_midi_event intel_cstate intel_rapl_perf snd_rawmidi mxm_wmi ttm
Jan 7 02:41:41 ceo1homenx kernel: [40698.439378] snd_seq 8250_dw btusb btrtl btbcm btintel bluetooth ecdh_generic drm_kms_helper snd_seq_device snd_timer snd idma64 soundcore drm i2c_algo_bit fb_sys_fops syscopyarea sysfillrect sysimgblt mac_hid virt_dma mei_me mei video wmi acpi_pad sch_fq_codel parport_pc ppdev lp sunrpc parport ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c hid_generic usbhid uas hid usb_storage alx ahci i2c_i801 intel_lpss_pci mdio libahci intel_lpss pinctrl_sunrisepoint pinctrl_intel
Jan 7 02:41:41 ceo1homenx kernel: [40698.439399] CPU: 6 PID: 24218 Comm: kworker/6:1 Tainted: G W 4.18.0-13-generic #14-Ubuntu
Jan 7 02:41:41 ceo1homenx kernel: [40698.439400] Hardware name: Dell Inc. XPS 8910/0WPMFG, BIOS 1.1.7 07/17/2018
Jan 7 02:41:41 ceo1homenx kernel: [40698.439423] Workqueue: events nouveau_cli_work [nouveau]
Jan 7 02:41:41 ceo1homenx kernel: [40698.439436] RIP: 0010:nvif_vmm_put+0x6d/0x80 [nouveau]
Jan 7 02:41:41 ceo1homenx kernel: [40698.439436] Code: 00 00 48 8d 55 e0 be 02 00 00 00 48 c7 45 e0 00 00 00 00 48 89 45 e8 e8 a1 e5 ff ff 85 c0 75 0a 48 c7 43 08 00 00 00 00 eb b7 <0f> 0b eb f2 e8 7a a9 b7 f9 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44
Jan 7 02:41:41 ceo1homenx kernel: [40698.439454] RSP: 0018:ffffb8f8486ffdb8 EFLAGS: 00010282
Jan 7 02:41:41 ceo1homenx kernel: [40698.439455] RAX: 00000000fffffffe RBX: ffffb8f8486ffde8 RCX: 0000000000000000
Jan 7 02:41:41 ceo1homenx kernel: [40698.439455] RDX: 0000000000000010 RSI: ffffb8f8486ffd28 RDI: ffffb8f8486ffdc8
Jan 7 02:41:41 ceo1homenx kernel: [40698.439456] RBP: ffffb8f8486ffdd8 R08: ffffffffc0970b40 R09: 0000000000000000
Jan 7 02:41:41 ceo1homenx kernel: [40698.439456] R10: ffff8af646b1d300 R11: 0000000000000030 R12: ffffb8f8486ffe20
Jan 7 02:41:41 ceo1homenx kernel: [40698.439457] R13: dead000000000200 R14: dead000000000100 R15: ffff8af646b1dde0
Jan 7 02:41:41 ceo1homenx kernel: [40698.439458] FS: 0000000000000000(0000) GS:ffff8af73ed80000(0000) knlGS:0000000000000000
Jan 7 02:41:41 ceo1homenx kernel: [40698.439459] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 7 02:41:41 ceo1homenx kernel: [40698.439459] CR2: 00007f2b0f778004 CR3: 00000002d040a001 CR4: 00000000003626e0
Jan 7 02:41:41 ceo1homenx kernel: [40698.439460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 7 02:41:41 ceo1homenx kernel: [40698.439460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Jan 7 02:41:41 ceo1homenx kernel: [40698.439461] Call Trace:
Jan 7 02:41:41 ceo1homenx kernel: [40698.439483] nouveau_vma_del+0x75/0xc0 [nouveau]
Jan 7 02:41:41 ceo1homenx kernel: [40698.439504] nouveau_gem_object_delete_work+0x3a/0x60 [nouveau]
Jan 7 02:41:41 ceo1homenx kernel: [40698.439524] nouveau_cli_work+0xc3/0x100 [nouveau]
Jan 7 02:41:41 ceo1homenx kernel: [40698.439526] ? __schedule+0x2a6/0x840
Jan 7 02:41:41 ceo1homenx kernel: [40698.439528] process_one_work+0x20f/0x3c0
Jan 7 02:41:41 ceo1homenx kernel: [40698.439530] worker_thread+0x34/0x400
Jan 7 02:41:41 ceo1homenx kernel: [40698.439531] kthread+0x120/0x140
Jan 7 02:41:41 ceo1homenx kernel: [40698.439533] ? pwq_unbound_release_workfn+0xd0/0xd0
Jan 7 02:41:41 ceo1homenx kernel: [40698.439534] ? kthread_bind+0x40/0x40
Jan 7 02:41:41 ceo1homenx kernel: [40698.439535] ret_from_fork+0x35/0x40
Jan 7 02:41:41 ceo1homenx kernel: [40698.439536] ---[ end trace 4a36f9e4d35c3e8b ]---