Backtrace

list_del corruption. prev->next should be ffff93438bfa7c90, but was 007300610063003b
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kernel BUG at lib/list_debug.c:51!
invalid opcode: 0000 [#1] SMP NOPTI
CPU: 3 PID: 339920 Comm: umount Tainted: G    B   W         5.12.8-300.fc34.x86_64 #1
Hardware name: Dell Inc. Latitude 7410/0M5G57, BIOS 1.5.2 02/09/2021
RIP: 0010:__list_del_entry_valid.cold+0x31/0x47
Code: 4f 41 8b e8 d3 2b fe ff 0f 0b 48 c7 c7 c0 4f 41 8b e8 c5 2b fe ff 0f 0b 48 89 f2 48 89 fe 48 c7 c7 80 4f 41 8b e8 b1 2b fe ff <0f> 0b 48 89 fe 4c 89 c2 48 c7 c7 48 4f 41 8b e8 9d 2b fe ff 0f 0b
RSP: 0018:ffffaea8c1653de8 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffff934533659600 RCX: 0000000000000000
RDX: ffff93458d6e6720 RSI: ffff93458d6d85c0 RDI: ffff93458d6d85c0
RBP: ffff93438bfa7c00 R08: 0000000000000000 R09: ffffaea8c1653c20
R10: ffffaea8c1653c18 R11: ffffffff8bb45f28 R12: ffff93438bfa7c58
R13: ffff93438bfa7c58 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fa4b0599c40(0000) GS:ffff93458d6c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa4b0832ec0 CR3: 0000000149a72005 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dentry_kill+0x89/0x180
 shrink_dentry_list+0x4e/0xc0
 shrink_dcache_parent+0xc1/0x100
 shrink_dcache_for_umount+0x37/0x110
 generic_shutdown_super+0x1a/0x100
 kill_block_super+0x21/0x50
 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+0x44/0xae
RIP: 0033:0x7fa4b07c838b
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 b1 2a 0c 00 f7 d8
RSP: 002b:00007ffd5b068ff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 000056270b99e730 RCX: 00007fa4b07c838b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000056270b99ee20
RBP: 000056270b99da30 R08: 0000000000000000 R09: 0000000000000010
R10: 00007fa4b088be90 R11: 0000000000000246 R12: 0000000000000000
R13: 000056270b99ee20 R14: 000056270b99db40 R15: 000056270b99da30
Modules linked in: tun sch_netem ppp_async pppox ppp_generic slhc authenc echainiv esp4 des_generic des3_ede_x86_64 libdes snd_usb_audio snd_usbmidi_lib snd_rawmidi uinput veth rfcomm snd_seq_dummy snd_hrtimer xt_nat br_netfilter overlay bridge stp llc ccm iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink cmac bnep sunrpc vfat fat squashfs loop snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof snd_sof_xtensa_dsp snd_soc_skl snd_hda_codec_hdmi snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi dell_rbtn snd_soc_core snd_hda_codec_realtek snd_hda_codec_generic snd_compress snd_pcm_dmaengine x86_pkg_temp_thermal ac97_bus intel_powerclamp snd_hda_intel coretemp snd_intel_dspcfg snd_intel_sdw_acpi iTCO_wdt kvm_intel intel_pmc_bxt snd_hda_codec mei_hdcp iTCO_vendor_support mei_wdt snd_hda_core snd_hwdep
 dell_laptop intel_rapl_msr ledtrig_audio kvm snd_seq iwlmvm dell_smm_hwmon dell_wmi snd_seq_device irqbypass rapl dell_smbios mac80211 intel_cstate snd_pcm dcdbas intel_uncore snd_timer libarc4 pcspkr dell_wmi_sysman snd i2c_i801 dell_wmi_descriptor wmi_bmof uvcvideo intel_wmi_thunderbolt i2c_smbus soundcore thunderbolt mei_me iwlwifi videobuf2_vmalloc mei btusb videobuf2_memops btrtl videobuf2_v4l2 btbcm videobuf2_common btintel bluetooth cfg80211 joydev videodev processor_thermal_device processor_thermal_rfim processor_thermal_mbox processor_thermal_rapl intel_rapl_common idma64 ucsi_acpi typec_ucsi ecdh_generic mc ecc rfkill intel_pch_thermal intel_soc_dts_iosf typec int3403_thermal int3400_thermal int340x_thermal_zone acpi_pad acpi_thermal_rel intel_hid soc_button_array sparse_keymap zram ip_tables dm_crypt trusted hid_sensor_hub intel_ishtp_loader intel_ishtp_hid i915 hid_multitouch crct10dif_pclmul rtsx_pci_sdmmc mmc_core crc32_pclmul i2c_algo_bit crc32c_intel
 drm_kms_helper nvme ghash_clmulni_intel cec nvme_core drm serio_raw rtsx_pci intel_ish_ipc intel_ishtp wmi i2c_hid_acpi i2c_hid video pinctrl_cannonlake fuse [last unloaded: iptable_filter]