I've got another of these: Nov 8 11:13:52 dsdk8y2u kernel: [435899.335507] ------------[ cut here ]------------ Nov 8 11:13:52 dsdk8y2u kernel: [435899.335509] WARNING: CPU: 2 PID: 218227 at fs/smb/client/connect.c:1979 __cifs_put_smb_ses+0x3dd/0x4d0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335563] Modules linked in: nls_utf8 cifs cifs_arc4 cifs_md4 fscache netfs snd_usb_audio snd_usbmidi_lib st ccm rfcomm xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat nf_tables nfnetlink br_netfilter bridge stp llc cmac algif_hash algif_skcipher af_alg snd_hda_codec_hdmi overlay bnep zram snd_sof_pci_intel_cnl snd_sof_intel_hda_com mon soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi soundwire_bus snd_soc_core snd _compress ac97_bus snd_ctl_led snd_pcm_dmaengine snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec binfmt_misc snd_hda_core snd_hwdep intel_tcc_cooling snd_pcm mei_hdcp mei_pxp x86_p kg_temp_thermal intel_powerclamp dell_rbtn intel_rapl_msr snd_seq_midi Nov 8 11:13:52 dsdk8y2u kernel: [435899.335604] coretemp snd_seq_midi_event dell_laptop nls_iso8859_1 kvm_intel dell_smm_hwmon snd_rawmidi dell_wmi kvm snd_seq irqbypass snd_seq_device rapl dell_smbios iwlmvm dcdbas intel_cstate typec_dis playport ledtrig_audio dell_wmi_sysman serio_raw dell_wmi_descriptor mac80211 firmware_attributes_class wmi_bmof libarc4 uvcvideo snd_timer videobuf2_vmalloc videobuf2_memops btusb videobuf2_v4l2 btrtl intel_wmi_thunderbolt snd btbcm btinte l btmtk soundcore videodev iwlwifi bluetooth videobuf2_common input_leds joydev ecdh_generic hid_multitouch mc cfg80211 ecc mei_me mei processor_thermal_device_pci_legacy processor_thermal_device hid_sensor_als hid_sensor_incl_3d hid_sensor _accel_3d hid_sensor_rotation hid_sensor_gyro_3d hid_sensor_magn_3d hid_sensor_custom_intel_hinge hid_sensor_prox processor_thermal_rfim hid_sensor_trigger processor_thermal_mbox industrialio_triggered_buffer processor_thermal_rapl kfifo_bu f intel_rapl_common hid_sensor_iio_common industrialio intel_soc_dts_iosf Nov 8 11:13:52 dsdk8y2u kernel: [435899.335642] intel_pch_thermal int3403_thermal mac_hid intel_hid int3400_thermal int340x_thermal_zone sparse_keymap acpi_thermal_rel soc_button_array acpi_pad sch_fq_codel msr parport_pc ppdev lp efi_pst ore parport ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c dm_crypt r8153_ecm cdc_ether usbnet hid_sensor_custom hid_sensor_hub intel_ishtp_hid r8152 mii i915 drm_buddy i2c_algo_bit ttm drm_display_helper crct10dif_ pclmul cec wacom crc32_pclmul usbhid rc_core polyval_clmulni hid_generic polyval_generic drm_kms_helper nvme ghash_clmulni_intel sha512_ssse3 syscopyarea rtsx_pci_sdmmc sysfillrect intel_lpss_pci ucsi_acpi aesni_intel i2c_i801 sysimgb lt thunderbolt intel_lpss crypto_simd i2c_hid_acpi psmouse i2c_hid i2c_smbus cryptd nvme_core typec_ucsi drm intel_ish_ipc nvme_common idma64 xhci_pci xhci_pci_renesas rtsx_pci typec hid intel_ishtp video pinctrl_cannonlake wmi z3fold zstd Nov 8 11:13:52 dsdk8y2u kernel: [435899.335687] CPU: 2 PID: 218227 Comm: kworker/2:0 Tainted: G W 6.2.0-36-generic #37~22.04.1-Ubuntu Nov 8 11:13:52 dsdk8y2u kernel: [435899.335689] Hardware name: Dell Inc. Latitude 7400 2-in-1/0HCNR3, BIOS 1.8.0 06/16/2020 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335691] Workqueue: events delayed_mntput Nov 8 11:13:52 dsdk8y2u kernel: [435899.335695] RIP: 0010:__cifs_put_smb_ses+0x3dd/0x4d0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335736] Code: e8 48 c7 c1 70 42 0a c2 48 c7 c2 0a f5 0c c2 41 89 c1 48 c7 c6 78 8f 0b c2 48 c7 c7 d0 67 11 c2 e8 e8 b2 63 df e9 21 ff ff ff <0f> 0b e9 a6 fc ff ff 49 8d 5e 20 48 89 df e8 40 55 e8 df 48 c7 c6 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335737] RSP: 0018:ffffbb0483557d00 EFLAGS: 00010286 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335739] RAX: 00000000ffffffff RBX: ffff91bc54422ee8 RCX: 0000000000000000 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335740] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335741] RBP: ffffbb0483557d30 R08: 0000000000000000 R09: 0000000000000000 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335742] R10: 0000000000000000 R11: 0000000000000000 R12: ffff91bf29020800 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335743] R13: ffff91bf29020838 R14: 0000000000000000 R15: ffff91bf29020800 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335744] FS: 0000000000000000(0000) GS:ffff91bfdc500000(0000) knlGS:0000000000000000 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335745] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335746] CR2: 00007f20280014fc CR3: 0000000196d0e006 CR4: 00000000003706e0 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335749] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335750] Call Trace: Nov 8 11:13:52 dsdk8y2u kernel: [435899.335751] <TASK> Nov 8 11:13:52 dsdk8y2u kernel: [435899.335753] ? show_regs+0x72/0x90 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335756] ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335796] ? __warn+0x8d/0x160 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335799] ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335840] ? report_bug+0x1bb/0x1d0 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335844] ? handle_bug+0x46/0x90 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335846] ? exc_invalid_op+0x19/0x80 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335848] ? asm_exc_invalid_op+0x1b/0x20 Nov 8 11:13:52 dsdk8y2u kernel: [435899.335851] ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335891] tconInfoFree+0x9b/0x110 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335936] cifs_put_tcon.part.0+0x109/0x2d0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.335976] cifs_put_tlink+0x4a/0x90 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.336015] cifs_umount+0x59/0xb0 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.336055] cifs_kill_sb+0x50/0x60 [cifs] Nov 8 11:13:52 dsdk8y2u kernel: [435899.336094] deactivate_locked_super+0x32/0xb0 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336097] deactivate_super+0x4a/0x60 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336099] cleanup_mnt+0x105/0x170 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336102] delayed_mntput+0x2c/0x50 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336103] process_one_work+0x21c/0x440 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336106] worker_thread+0x50/0x3f0 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336108] ? __pfx_worker_thread+0x10/0x10 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336110] kthread+0xeb/0x120 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336112] ? __pfx_kthread+0x10/0x10 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336115] ret_from_fork+0x29/0x50 Nov 8 11:13:52 dsdk8y2u kernel: [435899.336117] </TASK> Nov 8 11:13:52 dsdk8y2u kernel: [435899.336118] ---[ end trace 0000000000000000 ]---
I've got another of these: client/ connect. c:1979 __cifs_ put_smb_ ses+0x3dd/ 0x4d0 [cifs] netlink nf_conntrack pci_intel_ cnl snd_sof_ intel_hda_ com generic_ allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_soc_hdac_hda snd_hda_ext_core snd_soc_ acpi_intel_ match snd_soc_acpi soundwire_bus snd_soc_core snd codec_realtek snd_hda_ codec_generic snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec binfmt_misc snd_hda_core snd_hwdep intel_tcc_cooling snd_pcm mei_hdcp mei_pxp x86_p attributes_ class wmi_bmof libarc4 uvcvideo snd_timer videobuf2_vmalloc videobuf2_memops btusb videobuf2_v4l2 btrtl intel_wmi_ thunderbolt snd btbcm btinte thermal_ device_ pci_legacy processor_ thermal_ device hid_sensor_als hid_sensor_incl_3d hid_sensor custom_ intel_hinge hid_sensor_prox processor_ thermal_ rfim hid_sensor_trigger processor_ thermal_ mbox industrialio_ triggered_ buffer processor_ thermal_ rapl kfifo_bu iio_common industrialio intel_soc_dts_iosf thermal_ zone sparse_keymap acpi_thermal_rel soc_button_array acpi_pad sch_fq_codel msr parport_pc ppdev lp efi_pst cifs_put_ smb_ses+ 0x3dd/0x4d0 [cifs] 557d00 EFLAGS: 00010286 0(0000) GS:ffff91bfdc50 0000(0000) knlGS:000000000 0000000 put_smb_ ses+0x3dd/ 0x4d0 [cifs] put_smb_ ses+0x3dd/ 0x4d0 [cifs] bug+0x1bb/ 0x1d0 bug+0x46/ 0x90 op+0x19/ 0x80 invalid_ op+0x1b/ 0x20 put_smb_ ses+0x3dd/ 0x4d0 [cifs] 0x9b/0x110 [cifs] tcon.part. 0+0x109/ 0x2d0 [cifs] tlink+0x4a/ 0x90 [cifs] 0x59/0xb0 [cifs] sb+0x50/ 0x60 [cifs] locked_ super+0x32/ 0xb0 super+0x4a/ 0x60 mnt+0x105/ 0x170 mntput+ 0x2c/0x50 one_work+ 0x21c/0x440 thread+ 0x50/0x3f0 thread+ 0x10/0x10 0x10/0x10 fork+0x29/ 0x50
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335507] ------------[ cut here ]------------
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335509] WARNING: CPU: 2 PID: 218227 at fs/smb/
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335563] Modules linked in: nls_utf8 cifs cifs_arc4 cifs_md4 fscache netfs snd_usb_audio snd_usbmidi_lib st ccm rfcomm xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_
nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat nf_tables nfnetlink br_netfilter bridge stp llc cmac algif_hash algif_skcipher af_alg snd_hda_codec_hdmi overlay bnep zram snd_sof_
mon soundwire_intel soundwire_
_compress ac97_bus snd_ctl_led snd_pcm_dmaengine snd_hda_
kg_temp_thermal intel_powerclamp dell_rbtn intel_rapl_msr snd_seq_midi
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335604] coretemp snd_seq_midi_event dell_laptop nls_iso8859_1 kvm_intel dell_smm_hwmon snd_rawmidi dell_wmi kvm snd_seq irqbypass snd_seq_device rapl dell_smbios iwlmvm dcdbas intel_cstate typec_dis
playport ledtrig_audio dell_wmi_sysman serio_raw dell_wmi_descriptor mac80211 firmware_
l btmtk soundcore videodev iwlwifi bluetooth videobuf2_common input_leds joydev ecdh_generic hid_multitouch mc cfg80211 ecc mei_me mei processor_
_accel_3d hid_sensor_rotation hid_sensor_gyro_3d hid_sensor_magn_3d hid_sensor_
f intel_rapl_common hid_sensor_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335642] intel_pch_thermal int3403_thermal mac_hid intel_hid int3400_thermal int340x_
ore parport ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c dm_crypt r8153_ecm cdc_ether usbnet hid_sensor_custom hid_sensor_hub intel_ishtp_hid r8152 mii i915 drm_buddy i2c_algo_bit ttm drm_display_helper crct10dif_
pclmul cec wacom crc32_pclmul usbhid rc_core polyval_clmulni hid_generic polyval_generic drm_kms_helper nvme ghash_clmulni_intel sha512_ssse3 syscopyarea rtsx_pci_sdmmc sysfillrect intel_lpss_pci ucsi_acpi aesni_intel i2c_i801 sysimgb
lt thunderbolt intel_lpss crypto_simd i2c_hid_acpi psmouse i2c_hid i2c_smbus cryptd nvme_core typec_ucsi drm intel_ish_ipc nvme_common idma64 xhci_pci xhci_pci_renesas rtsx_pci typec hid intel_ishtp video pinctrl_cannonlake wmi z3fold zstd
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335687] CPU: 2 PID: 218227 Comm: kworker/2:0 Tainted: G W 6.2.0-36-generic #37~22.04.1-Ubuntu
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335689] Hardware name: Dell Inc. Latitude 7400 2-in-1/0HCNR3, BIOS 1.8.0 06/16/2020
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335691] Workqueue: events delayed_mntput
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335695] RIP: 0010:__
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335736] Code: e8 48 c7 c1 70 42 0a c2 48 c7 c2 0a f5 0c c2 41 89 c1 48 c7 c6 78 8f 0b c2 48 c7 c7 d0 67 11 c2 e8 e8 b2 63 df e9 21 ff ff ff <0f> 0b e9 a6 fc ff ff 49 8d 5e 20 48 89 df e8 40 55 e8 df 48 c7 c6
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335737] RSP: 0018:ffffbb0483
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335739] RAX: 00000000ffffffff RBX: ffff91bc54422ee8 RCX: 0000000000000000
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335740] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335741] RBP: ffffbb0483557d30 R08: 0000000000000000 R09: 0000000000000000
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335742] R10: 0000000000000000 R11: 0000000000000000 R12: ffff91bf29020800
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335743] R13: ffff91bf29020838 R14: 0000000000000000 R15: ffff91bf29020800
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335744] FS: 000000000000000
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335745] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335746] CR2: 00007f20280014fc CR3: 0000000196d0e006 CR4: 00000000003706e0
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335748] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335749] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335750] Call Trace:
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335751] <TASK>
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335753] ? show_regs+0x72/0x90
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335756] ? __cifs_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335796] ? __warn+0x8d/0x160
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335799] ? __cifs_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335840] ? report_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335844] ? handle_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335846] ? exc_invalid_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335848] ? asm_exc_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335851] ? __cifs_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335891] tconInfoFree+
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335936] cifs_put_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.335976] cifs_put_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336015] cifs_umount+
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336055] cifs_kill_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336094] deactivate_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336097] deactivate_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336099] cleanup_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336102] delayed_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336103] process_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336106] worker_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336108] ? __pfx_worker_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336110] kthread+0xeb/0x120
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336112] ? __pfx_kthread+
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336115] ret_from_
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336117] </TASK>
Nov 8 11:13:52 dsdk8y2u kernel: [435899.336118] ---[ end trace 0000000000000000 ]---