Backtrace

WARNING: CPU: 4 PID: 179 at drivers/gpu/drm/nouveau/nvkm/subdev/bar/g84.c:35 g84_bar_flush+0xae/0xc0 [nouveau]
Modules linked in: ccm uinput snd_seq_dummy snd_hrtimer nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast 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 ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter sunrpc rtl8192se rtl_pci snd_hda_codec_realtek intel_powerclamp snd_hda_codec_generic rtlwifi snd_hda_codec_hdmi ledtrig_audio coretemp snd_hda_intel mac80211 snd_intel_dspcfg soundwire_intel soundwire_generic_allocation snd_soc_core uvcvideo iTCO_wdt intel_pmc_bxt kvm_intel iTCO_vendor_support snd_compress videobuf2_vmalloc snd_pcm_dmaengine videobuf2_memops soundwire_cadence snd_hda_codec videobuf2_v4l2 kvm snd_hda_core videobuf2_common ac97_bus irqbypass snd_hwdep videodev intel_cstate snd_seq
 snd_seq_device intel_uncore joydev cfg80211 pcspkr mc i2c_i801 snd_pcm i2c_smbus i7core_edac mei_me toshiba_acpi jmb38x_ms sparse_keymap snd_timer lpc_ich memstick libarc4 mei industrialio snd soundcore rfkill toshiba_haps acpi_cpufreq zram ip_tables dm_crypt nouveau mxm_wmi wmi i2c_algo_bit drm_ttm_helper ttm drm_kms_helper cec sdhci_pci drm cqhci crc32c_intel sdhci serio_raw mmc_core r8169 video fuse
CPU: 4 PID: 179 Comm: kworker/4:3 Not tainted 5.11.12-300.fc34.x86_64 #1
Hardware name: TOSHIBA Satellite A665/NWQAA, BIOS 2.20 09/14/11
Workqueue: events nouveau_cli_work [nouveau]
RIP: 0010:g84_bar_flush+0xae/0xc0 [nouveau]
Code: 8b 40 10 48 8b 78 10 4c 8b 6f 50 4d 85 ed 75 03 4c 8b 2f e8 e4 dc 49 f1 4c 89 ea 48 c7 c7 30 41 48 c0 48 89 c6 e8 f1 d8 83 f1 <0f> 0b eb b8 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 66 66 66 66
RSP: 0018:ffff996100617aa8 EFLAGS: 00010096
RAX: 000000000000001d RBX: ffff8b3049c6ac00 RCX: 0000000000000027
RDX: ffff8b307bd18ac8 RSI: 0000000000000001 RDI: ffff8b307bd18ac0
RBP: ffff8b3046f27a08 R08: 0000000000000000 R09: ffff9961006178d8
R10: ffff9961006178d0 R11: ffffffffb2b44f08 R12: 0000000000000292
R13: ffff8b3041102270 R14: ffff8b2f70f97360 R15: ffff8b2f46f3a180
FS:  0000000000000000(0000) GS:ffff8b307bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff1f4a7c080 CR3: 000000002e8d8000 CR4: 00000000000006e0
Call Trace:
 nv50_instobj_release+0x2f/0xc0 [nouveau]
 nvkm_vmm_iter.constprop.0+0x72f/0x7e0 [nouveau]
 ? update_sd_lb_stats.constprop.0+0x7ef/0x870
 nvkm_vmm_put_locked+0xfd/0x260 [nouveau]
 ? nvkm_vmm_ptes_sparse+0x1c0/0x1c0 [nouveau]
 ? nv44_vmm_new+0xc0/0xc0 [nouveau]
 nvkm_uvmm_mthd+0x3d3/0x760 [nouveau]
 nvkm_ioctl+0xdc/0x180 [nouveau]
 nvif_object_mthd+0x104/0x130 [nouveau]
 ? update_load_avg+0x7a/0x5c0
 nvif_vmm_put+0x37/0x50 [nouveau]
 nouveau_vma_del+0x58/0xa0 [nouveau]
 nouveau_gem_object_delete_work+0x26/0x40 [nouveau]
 nouveau_cli_work+0xcc/0x120 [nouveau]
 process_one_work+0x1ec/0x380
 worker_thread+0x53/0x3e0
 ? process_one_work+0x380/0x380
 kthread+0x11b/0x140
 ? kthread_associate_blkcg+0xa0/0xa0
 ret_from_fork+0x22/0x30