Backtrace

WARNING: CPU: 0 PID: 669312 at fs/btrfs/delayed-inode.c:1370 btrfs_assert_delayed_root_empty+0x6c/0x80
Modules linked in: ib_core hidp rfcomm snd_seq_dummy snd_hrtimer br_netfilter bridge stp llc nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set overlay nf_tables nfnetlink bnep sunrpc vfat fat squashfs loop snd_hda_codec_hdmi snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi snd_ctl_led snd_soc_core snd_hda_codec_realtek snd_hda_codec_generic snd_compress iwlmvm snd_pcm_dmaengine iTCO_wdt ac97_bus intel_pmc_bxt nvidia_drm(POE) snd_hda_intel nvidia_modeset(POE) snd_intel_dspcfg iTCO_vendor_support mei_hdcp intel_rapl_msr snd_intel_sdw_acpi mac80211 snd_usb_audio intel_tcc_cooling nvidia_uvm(POE) snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_usbmidi_lib coretemp snd_hda_core libarc4 rapl snd_hwdep btusb snd_rawmidi intel_cstate iwlwifi btrtl snd_seq intel_uncore btbcm huawei_wmi btintel ledtrig_audio snd_seq_device uvcvideo sparse_keymap bluetooth intel_wmi_thunderbolt wmi_bmof
 pcspkr cfg80211 nvidia(POE) videobuf2_vmalloc snd_pcm i2c_i801 videobuf2_memops videobuf2_v4l2 i2c_smbus videobuf2_common spi_pxa2xx_platform processor_thermal_device snd_timer mei_me dw_dmac processor_thermal_rfim mei processor_thermal_mbox snd ecdh_generic rfkill processor_thermal_rapl videodev joydev soundcore idma64 intel_rapl_common ecc mc intel_pch_thermal intel_xhci_usb_role_switch intel_soc_dts_iosf acpi_als industrialio_triggered_buffer kfifo_buf int3403_thermal industrialio int340x_thermal_zone int3400_thermal acpi_pad dptf_power acpi_thermal_rel binfmt_misc zram dm_crypt trusted asn1_encoder r8152 mii hid_jabra uas usb_storage i915 hid_multitouch i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel cec nvme drm ghash_clmulni_intel serio_raw nvme_core i2c_hid_acpi i2c_hid wmi video pinctrl_sunrisepoint kvm_intel kvm irqbypass fuse [last unloaded: ip_tables]
CPU: 0 PID: 669312 Comm: umount Tainted: P        W  OE     5.13.9-200.fc34.x86_64 #1
Hardware name: HUAWEI MACH-WX9/MACH-WX9, BIOS 1.18 08/30/2018
RIP: 0010:btrfs_assert_delayed_root_empty+0x6c/0x80
Code: 2e 8d 50 01 09 c2 78 16 48 89 ef c6 07 00 0f 1f 40 00 48 85 db 75 13 5b 5d c3 31 db eb ea be 01 00 00 00 e8 d6 d9 11 00 eb de <0f> 0b 5b 5d c3 be 02 00 00 00 e8 c5 d9 11 00 eb cd 0f 1f 00 0f 1f
RSP: 0018:ffffa9d8c080fd98 EFLAGS: 00010282
RAX: 00000000000001bc RBX: ffff943d03698d68 RCX: 0000000000000000
RDX: 00000000000001bd RSI: ffff943b66290558 RDI: ffff943b66290540
RBP: ffff943b66290540 R08: ffff943b66290558 R09: ffff943b66290558
R10: 0000000000000000 R11: 0000000000000000 R12: ffff943abcd57000
R13: ffff943abcd57520 R14: ffff943abcd57550 R15: 0000000000000000
FS:  00007f9a03238c40(0000) GS:ffff943df1e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0d2d54224 CR3: 0000000105fb4006 CR4: 00000000003706f0
Call Trace:
 btrfs_cleanup_transaction.isra.0+0x36d/0x560
 ? __cancel_work_timer+0xea/0x170
 ? btrfs_discard_cleanup+0x40/0xf0
 close_ctree+0x155/0x2bf
 generic_shutdown_super+0x74/0x110
 kill_anon_super+0x14/0x30
 btrfs_kill_super+0x12/0x20
 deactivate_locked_super+0x36/0xa0
 cleanup_mnt+0x131/0x190
 task_work_run+0x65/0xa0
 exit_to_user_mode_prepare+0x237/0x240
 syscall_exit_to_user_mode+0x18/0x40
 do_syscall_64+0x4d/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9a0346738b
Code: 2a 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 b9 2a 0c 00 f7 d8
RSP: 002b:00007ffc7658e298 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000563804c659b0 RCX: 00007f9a0346738b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000563804c64690
RBP: 0000563804c64460 R08: 0000000000000000 R09: 00007f9a0352aa60
R10: 0000563804c65aa0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000563804c64690 R14: 0000563804c64570 R15: 0000563804c64460