Backtrace

WARNING: CPU: 21 PID: 185 at drivers/gpu/drm/nouveau/nvkm/subdev/bar/g84.c:35 g84_bar_flush+0xae/0xc0 [nouveau]
Modules linked in: 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 rfkill ip_set nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter sunrpc vfat fat snd_hda_codec_realtek ucsi_ccg typec_ucsi intel_rapl_msr typec snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation intel_rapl_common snd_soc_core edac_mce_amd snd_compress snd_pcm_dmaengine soundwire_cadence snd_usb_audio snd_hda_codec joydev snd_hda_core snd_usbmidi_lib ac97_bus uvcvideo snd_rawmidi snd_hwdep videobuf2_vmalloc snd_seq videobuf2_memops snd_seq_device kvm videobuf2_v4l2 videobuf2_common snd_pcm
 videodev irqbypass snd_timer snd mc usblp rapl soundcore sp5100_tco pcspkr i2c_piix4 i2c_nvidia_gpu k10temp wmi_bmof gpio_amdpt gpio_generic acpi_cpufreq zram ip_tables nouveau video drm_ttm_helper ttm drm_kms_helper crct10dif_pclmul cec crc32_pclmul crc32c_intel ghash_clmulni_intel drm nvme igb uas nvme_core usb_storage ccp mxm_wmi dca i2c_algo_bit wmi pinctrl_amd fuse
CPU: 21 PID: 185 Comm: kworker/21:1 Tainted: G        W         5.11.12-300.fc34.x86_64 #1
Hardware name: Micro-Star International Co., Ltd. MS-7B09/X399 GAMING PRO CARBON AC (MS-7B09), BIOS 1.70 12/18/2017
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 8c ef fb 4c 89 ea 48 c7 c7 30 91 a2 c0 48 89 c6 e8 f1 88 29 fc <0f> 0b eb b8 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f 1f 44 00
RSP: 0018:ffffa8f400a77aa8 EFLAGS: 00010096
RAX: 000000000000001d RBX: ffff9427889ffc00 RCX: 0000000000000027
RDX: ffff942ebd758ac8 RSI: 0000000000000001 RDI: ffff942ebd758ac0
RBP: ffff942781cf8d48 R08: 0000000000000000 R09: ffffa8f400a778d8
R10: ffffa8f400a778d0 R11: ffff942edf2c34a8 R12: 0000000000000292
R13: ffff942782f8a6a0 R14: ffff9427cfea2c60 R15: ffff942783a3cf00
FS:  0000000000000000(0000) GS:ffff942ebd740000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f512d0da000 CR3: 00000001788de000 CR4: 00000000003506e0
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]
 ? gf100_vmm_invalidate_pdb+0x30/0x30 [nouveau]
 nvkm_uvmm_mthd+0x3d3/0x760 [nouveau]
 nvkm_ioctl+0xdc/0x180 [nouveau]
 nvif_object_mthd+0x104/0x130 [nouveau]
 ? load_balance+0x7b0/0xd00
 ? 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