Backtrace

WARNING: CPU: 1 PID: 3792 at fs/btrfs/extent-tree.c:2124 btrfs_run_delayed_refs+0x1ad/0x200
Modules linked in: tcp_diag udp_diag inet_diag snd_seq_dummy snd_hrtimer rpcrdma rdma_cm iw_cm ib_cm ib_core nft_counter xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat bridge stp llc rfkill ip_set nf_tables nfnetlink vfat fat dm_crypt snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio nvidia_drm(POE) intel_rapl_msr intel_rapl_common snd_hda_codec_hdmi nvidia_modeset(POE) snd_hda_intel snd_intel_dspcfg nvidia_uvm(POE) soundwire_intel soundwire_generic_allocation x86_pkg_temp_thermal intel_powerclamp coretemp snd_soc_core snd_compress kvm_intel snd_pcm_dmaengine soundwire_cadence snd_hda_codec kvm mei_hdcp snd_hda_core iTCO_wdt ac97_bus snd_hwdep intel_pmc_bxt iTCO_vendor_support irqbypass ee1004 rapl nvidia(POE) snd_seq intel_cstate snd_seq_device intel_uncore snd_pcm pcspkr joydev i2c_i801 snd_timer i2c_smbus snd soundcore mei_me mei acpi_pad nfsd auth_rpcgss nfs_acl lockd grace binfmt_misc sunrpc nfs_ssc zram ip_tables i915 i2c_algo_bit
 drm_kms_helper mxm_wmi cec drm e1000e crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel serio_raw sata_sil24 wmi video fuse
CPU: 1 PID: 3792 Comm: umount Tainted: P           OE     5.11.12-300.fc34.x86_64 #1
Hardware name: Micro-Star International Co., Ltd. MS-7B47/Z370 TOMAHAWK (MS-7B47), BIOS 1.10 11/01/2017
RIP: 0010:btrfs_run_delayed_refs+0x1ad/0x200
Code: 48 81 c2 48 0a 00 00 f0 48 0f ba 2a 03 72 20 83 f8 fb 74 3c 83 f8 e2 74 37 89 c6 48 c7 c7 f0 2b 3e a1 89 04 24 e8 02 3b 6e 00 <0f> 0b 8b 04 24 89 c1 ba 4c 08 00 00 4c 89 e7 89 04 24 48 c7 c6 80
RSP: 0018:ffffb6d848bc3c88 EFLAGS: 00010292
RAX: 0000000000000026 RBX: ffffffffffffffff RCX: 0000000000000027
RDX: ffff9cc46ee58ac8 RSI: 0000000000000001 RDI: ffff9cc46ee58ac0
RBP: ffff9cc14a23b378 R08: 0000000000000000 R09: ffffb6d848bc3ab8
R10: ffffb6d848bc3ab0 R11: ffffffffa1b44f08 R12: ffff9cc100480680
R13: ffff9cc12851bc00 R14: ffff9cc12851bd60 R15: ffff9cc16dcc1850
FS:  00007f6548de7c40(0000) GS:ffff9cc46ee40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055785196ca20 CR3: 00000001b2c9a001 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 btrfs_write_dirty_block_groups+0x16a/0x380
 ? btrfs_run_delayed_refs+0x97/0x200
 commit_cowonly_roots+0x220/0x2e0
 btrfs_commit_transaction+0x302/0xa80
 close_ctree+0x103/0x2a7
 ? fsnotify_grab_connector+0x49/0x80
 ? fsnotify_destroy_marks+0x13/0xe0
 generic_shutdown_super+0x6c/0x100
 kill_anon_super+0x14/0x30
 btrfs_kill_super+0x12/0x20
 deactivate_locked_super+0x36/0xa0
 cleanup_mnt+0x12d/0x190
 task_work_run+0x65/0xa0
 exit_to_user_mode_prepare+0x181/0x1b0
 syscall_exit_to_user_mode+0x18/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f65490166db
Code: 27 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 61 27 0c 00 f7 d8
RSP: 002b:00007fffb7a879b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 000055ab23b85750 RCX: 00007f65490166db
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055ab23b8b800
RBP: 000055ab23b85520 R08: 0000000000000000 R09: 00007f65490d9a60
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000055ab23b8b800 R14: 000055ab23b85630 R15: 000055ab23b85520