Backtrace

BUG: Dentry 000000008c9d9660{i=1840434,n=gconv}  still in use (128) [unmount of ext4 nvme0n1p4]
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WARNING: CPU: 4 PID: 203917 at fs/dcache.c:1651 umount_check.cold+0x2f/0x3b
Modules linked in: xt_nat veth ppp_async ppp_generic slhc snd_seq_dummy snd_hrtimer xt_conntrack xt_MASQUERADE nf_conntrack_netlink xt_addrtype br_netfilter bridge stp llc uinput 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 overlay nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter qrtr tun sunrpc binfmt_misc vfat fat squashfs loop snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio intel_rapl_msr intel_rapl_common snd_hda_intel snd_intel_dspcfg edac_mce_amd snd_usb_audio uvcvideo snd_intel_sdw_acpi videobuf2_vmalloc snd_usbmidi_lib videobuf2_memops snd_hda_codec kvm_amd snd_hda_core snd_rawmidi videobuf2_v4l2 snd_hwdep kvm snd_seq
 snd_seq_device videobuf2_common eeepc_wmi ch341 snd_pcm rapl videodev asus_wmi joydev sparse_keymap platform_profile uas snd_timer rfkill mc video pcspkr wmi_bmof snd usb_storage mxm_wmi k10temp i2c_piix4 soundcore gpio_amdpt gpio_generic acpi_cpufreq zram ip_tables amdgpu hid_logitech_hidpp drm_ttm_helper ttm iommu_v2 gpu_sched drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel hid_logitech_dj cec igb sp5100_tco drm nvme ccp dca nvme_core i2c_algo_bit wmi vfio_pci vfio_pci_core irqbypass vfio_virqfd vfio_iommu_type1 vfio ipmi_devintf ipmi_msghandler fuse
CPU: 4 PID: 203917 Comm: umount Not tainted 5.16.11-200.fc35.x86_64 #1
Hardware name: System manufacturer System Product Name/PRIME X399-A, BIOS 1203 10/09/2019
RIP: 0010:umount_check.cold+0x2f/0x3b
Code: 8d 88 c8 03 00 00 48 8b 40 28 4c 8b 08 48 8b 46 30 48 85 c0 74 1c 48 8b 50 40 51 48 c7 c7 e0 9d 60 bc 48 89 f1 e8 f8 5e ff ff <0f> 0b 58 e9 9c 34 73 ff 31 d2 eb e4 48 8b 45 28 49 8b 74 24 28 48
RSP: 0018:ffffa19c1e6d3de0 EFLAGS: 00010286
RAX: 000000000000005f RBX: ffff94e1d61a2c00 RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffffbc634885 RDI: 00000000ffffffff
RBP: 000000000001a712 R08: 0000000000000000 R09: ffffa19c1e6d3c28
R10: ffffa19c1e6d3c20 R11: ffff94f11effffe8 R12: ffff94ea4c1ca9a0
R13: ffff94ea4c1cc1d8 R14: ffff94ea4c1cc180 R15: ffff94e1d61a2c58
FS:  00007f651015b500(0000) GS:ffff94e91f100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d25ee62de8 CR3: 00000001191fa000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 d_walk+0xd6/0x2a0
 ? shrink_lock_dentry.part.0+0xe0/0xe0
 shrink_dcache_for_umount+0x49/0x110
 generic_shutdown_super+0x1a/0x120
 kill_block_super+0x21/0x50
 deactivate_locked_super+0x36/0xa0
 cleanup_mnt+0x131/0x190
 task_work_run+0x5c/0x90
 exit_to_user_mode_prepare+0x229/0x230
 syscall_exit_to_user_mode+0x18/0x40
 do_syscall_64+0x48/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f651036791b
Code: 13 85 0e 00 f7 d8 64 89 01 48 83 c8 ff c3 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 d9 84 0e 00 f7 d8
RSP: 002b:00007fff1ac422b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00005576668f5700 RCX: 00007f651036791b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005576668f69c0
RBP: 00005576668f54d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000
R13: 00005576668f69c0 R14: 00005576668f55e0 R15: 00005576668f54d0
 </TASK>