kernel crashes in CIFS code

[Russell Coker]

I've had several crashes like this on 2 different systems mounting the same SMB server.

Oct 19 13:25:47 1y51573u kernel: [ 1103.030468] ------------[ cut here ]------------
Oct 19 13:25:47 1y51573u kernel: [ 1103.030477] WARNING: CPU: 2 PID: 5411 at fs/cifs/connect.c:1979 __cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.030684] Modules linked in: nls_utf8 cifs cifs_arc4 cifs_md4 fscache netfs ccm xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_u
ser xfrm_algo xt_addrtype nft_compat nf_tables nfnetlink br_netfilter bridge stp llc rfcomm cmac algif_hash algif_skcipher af_alg bnep snd_hda_codec_hdmi overlay zram snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundw
ire_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 mei_pxp mei_hdcp snd_soc_core snd_ctl_
led snd_compress intel_tcc_cooling ac97_bus snd_hda_codec_realtek snd_pcm_dmaengine snd_hda_codec_generic x86_pkg_temp_thermal intel_rapl_msr binfmt_misc intel_powerclamp joydev coretemp snd_hda_intel dell_rbtn snd_intel_dspcfg snd_inte
l_sdw_acpi kvm_intel snd_hda_codec snd_hda_core snd_hwdep dell_laptop dell_smm_hwmon
Oct 19 13:25:47 1y51573u kernel: [ 1103.030844] nls_iso8859_1 kvm snd_pcm irqbypass snd_seq_midi rapl snd_seq_midi_event intel_cstate dell_wmi snd_rawmidi serio_raw uvcvideo typec_displayport dell_wmi_sysman dell_smbios snd_seq iwlmvm
btusb dcdbas btrtl snd_seq_device firmware_attributes_class ledtrig_audio dell_wmi_descriptor videobuf2_vmalloc wmi_bmof intel_wmi_thunderbolt btbcm mac80211 snd_timer videobuf2_memops cmdlinepart videobuf2_v4l2 btintel spi_nor snd btmt
k mtd libarc4 soundcore videodev bluetooth processor_thermal_device_pci_legacy hid_sensor_custom_intel_hinge hid_sensor_als input_leds hid_sensor_gyro_3d videobuf2_common hid_multitouch processor_thermal_device iwlwifi hid_sensor_trigge
r mc ecdh_generic processor_thermal_rfim industrialio_triggered_buffer processor_thermal_mbox kfifo_buf mei_me ecc hid_sensor_iio_common cfg80211 processor_thermal_rapl mei industrialio intel_rapl_common intel_soc_dts_iosf intel_pch_the
rmal int3403_thermal int340x_thermal_zone mac_hid int3400_thermal intel_hid sparse_keymap
Oct 19 13:25:47 1y51573u kernel: [ 1103.030992] soc_button_array acpi_thermal_rel acpi_pad sch_fq_codel msr parport_pc ppdev lp parport efi_pstore ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c r8153_ecm cdc_et
her usbnet r8152 dm_crypt mii usbhid hid_sensor_custom hid_sensor_hub intel_ishtp_hid i915 drm_buddy i2c_algo_bit hid_generic ttm crct10dif_pclmul drm_display_helper crc32_pclmul cec polyval_clmulni rc_core polyval_generic ghash_clmulni
_intel drm_kms_helper sha512_ssse3 syscopyarea aesni_intel sysfillrect rtsx_pci_sdmmc nvme sysimgblt intel_lpss_pci spi_intel_pc
i i2c_i801 ucsi_acpi intel_lpss crypto_simd nvme_core i2c_smbus xhci_pci typec_ucsi spi_intel drm intel_ish_ipc psmouse thunderbolt nvme_common i2c_hid_acpi rtsx_pci xhci_pci_renesas idma64 cryptd typec intel_ishtp i2c_hid hid video wmi pinctrl_cannonlake z3fold zstd
Oct 19 13:25:47 1y51573u kernel: [ 1103.031153] CPU: 2 PID: 5411 Comm: kworker/2:1 Not tainted 6.2.0-34-generic #34~22.04.1-Ubuntu
Oct 19 13:25:47 1y51573u kernel: [ 1103.031162] Hardware name: Dell Inc. Latitude 7410/0M5G57, BIOS 1.24.0 07/06/2023
Oct 19 13:25:47 1y51573u kernel: [ 1103.031167] Workqueue: events delayed_mntput
Oct 19 13:25:47 1y51573u kernel: [ 1103.031180] RIP: 0010:__cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.031364] Code: e8 48 c7 c1 70 32 fe c1 48 c7 c2 30 e4 00 c2 41 89 c1 48 c7 c6 68 7f ff c1 48 c7 c7 d0 47 05 c2 e8 a8 b5 4f de e9 21 ff ff ff <0f> 0b e9 a6 fc ff ff 49 8d 5e 20 48 89 df e8 00 47 d4 de 48 c7 c6
Oct 19 13:25:47 1y51573u kernel: [ 1103.031371] RSP: 0018:ffffb01c50b9bd38 EFLAGS: 00010286
Oct 19 13:25:47 1y51573u kernel: [ 1103.031378] RAX: 00000000ffffffff RBX: ffff9d72da1353c0 RCX: 0000000000000000
Oct 19 13:25:47 1y51573u kernel: [ 1103.031383] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
Oct 19 13:25:47 1y51573u kernel: [ 1103.031387] RBP: ffffb01c50b9bd68 R08: 0000000000000000 R09: 0000000000000000
Oct 19 13:25:47 1y51573u kernel: [ 1103.031391] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9d72ca687800
Oct 19 13:25:47 1y51573u kernel: [ 1103.031395] R13: ffff9d72ca687838 R14: 0000000000000000 R15: ffff9d764d7319c0
Oct 19 13:25:47 1y51573u kernel: [ 1103.031400] FS: 0000000000000000(0000) GS:ffff9d764d700000(0000) knlGS:0000000000000000
Oct 19 13:25:47 1y51573u kernel: [ 1103.031405] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Oct 19 13:25:47 1y51573u kernel: [ 1103.031411] CR2: 00007f8ecb8df370 CR3: 0000000395e10006 CR4: 00000000003706e0
Oct 19 13:25:47 1y51573u kernel: [ 1103.031416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Oct 19 13:25:47 1y51573u kernel: [ 1103.031420] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Oct 19 13:25:47 1y51573u kernel: [ 1103.031424] Call Trace:
Oct 19 13:25:47 1y51573u kernel: [ 1103.031428] <TASK>
Oct 19 13:25:47 1y51573u kernel: [ 1103.031436] ? show_regs+0x72/0x90
Oct 19 13:25:47 1y51573u kernel: [ 1103.031448] ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.031629] ? __warn+0x8d/0x160
Oct 19 13:25:47 1y51573u kernel: [ 1103.031641] ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.031824] ? report_bug+0x1bb/0x1d0
Oct 19 13:25:47 1y51573u kernel: [ 1103.031834] ? handle_bug+0x46/0x90
Oct 19 13:25:47 1y51573u kernel: [ 1103.031847] ? exc_invalid_op+0x19/0x80
Oct 19 13:25:47 1y51573u kernel: [ 1103.031858] ? asm_exc_invalid_op+0x1b/0x20
Oct 19 13:25:47 1y51573u kernel: [ 1103.031871] ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.032050] ? __cifs_put_smb_ses+0x7d/0x4d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.032227] ? tconInfoFree+0xb9/0x110 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.032430] cifs_put_tcon.part.0+0x125/0x2d0 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.032611] cifs_put_tlink+0x4a/0x90 [cifs]
Oct 19 13:25:47 1y51573u kernel: [ 1103.032831] cifs_umount+0x59/0xb0 [cifs]
Oct 19 13:25:49 1y51573u kernel: [ 1103.033015] cifs_kill_sb+0x50/0x60 [cifs]
Oct 19 13:25:49 1y51573u kernel: [ 1103.033191] deactivate_locked_super+0x32/0xb0
Oct 19 13:25:49 1y51573u kernel: [ 1103.033204] deactivate_super+0x4a/0x60
Oct 19 13:25:49 1y51573u kernel: [ 1103.033214] cleanup_mnt+0x105/0x170
Oct 19 13:25:49 1y51573u kernel: [ 1103.033223] delayed_mntput+0x2c/0x50
Oct 19 13:25:49 1y51573u kernel: [ 1103.033231] process_one_work+0x21c/0x440
Oct 19 13:25:49 1y51573u kernel: [ 1103.033242] worker_thread+0x50/0x3f0
Oct 19 13:25:49 1y51573u kernel: [ 1103.033251] ? __pfx_worker_thread+0x10/0x10
Oct 19 13:25:49 1y51573u kernel: [ 1103.033259] kthread+0xeb/0x120
Oct 19 13:25:49 1y51573u kernel: [ 1103.033270] ? __pfx_kthread+0x10/0x10
Oct 19 13:25:49 1y51573u kernel: [ 1103.033280] ret_from_fork+0x29/0x50
Oct 19 13:25:49 1y51573u kernel: [ 1103.033292] </TASK>
Oct 19 13:25:49 1y51573u kernel: [ 1103.033295] ---[ end trace 0000000000000000 ]---

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.2.0-34-generic 6.2.0-34.34~22.04.1
ProcVersionSignature: Ubuntu 6.2.0-34.34~22.04.1-generic 6.2.16
Uname: Linux 6.2.0-34-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Thu Oct 19 13:45:46 2023
InstallationDate: Installed on 2023-04-14 (187 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
SourcePackage: linux-signed-hwe-6.2
UpgradeStatus: No upgrade log present (probably fresh install)

[Alex Ball (a-ball)]

This has started happening for me since upgrading linux-image-generic-hwe-22.04 from 6.2.0.31.31~22.04.8 to 6.2.0.32.32~22.04.9. It is still happening currently with 6.2.0.36.37~22.04.14.

I get this issue typically when (auto-) mounting or unmounting a CIFS share that has VFS, resulting in a NULL pointer dereference in the kernel and a soft lockup in the CPU. A recent example:

Oct 31 14:46:04 lipc-carsus kernel: ------------[ cut here ]------------
Oct 31 14:46:04 lipc-carsus kernel: WARNING: CPU: 4 PID: 29475 at fs/cifs/connect.c:1979 __cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 31 14:46:04 lipc-carsus kernel: Modules linked in: nls_utf8 cifs cifs_arc4 cifs_md4 fscache netfs authenc echainiv esp4 ccm rfcomm nft_masq xfrm_user xfrm_algo nft_chain_nat nf_nat bridge stp llc vhost_vsock vmw_vsock_virtio_transp>
Oct 31 14:46:04 lipc-carsus kernel: 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_ctl_led snd_soc_acpi_intel_match snd_soc_a>
Oct 31 14:46:04 lipc-carsus kernel: hid_multitouch mei intel_rapl_common intel_soc_dts_iosf intel_pch_thermal int3403_thermal int340x_thermal_zone int3400_thermal dell_smo8800 intel_hid acpi_thermal_rel mac_hid acpi_pad sparse_keymap >
Oct 31 14:46:04 lipc-carsus kernel: CPU: 4 PID: 29475 Comm: umount Tainted: P OE 6.2.0-35-generic #35~22.04.1-Ubuntu
Oct 31 14:46:04 lipc-carsus kernel: Hardware name: Dell Inc. Latitude 5591/0DVVG1, BIOS 1.28.0 07/04/2023
Oct 31 14:46:04 lipc-carsus kernel: RIP: 0010:__cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 31 14:46:04 lipc-carsus kernel: Code: e8 48 c7 c1 70 82 d5 c1 48 c7 c2 30 34 d8 c1 41 89 c1 48 c7 c6 68 cf d6 c1 48 c7 c7 d0 97 dc c1 e8 a8 65 98 c8 e9 21 ff ff ff <0f> 0b e9 a6 fc ff ff 49 8d 5e 20 48 89 df e8 00 f7 1c c9 48 c7 c6
Oct 31 14:46:04 lipc-carsus kernel: RSP: 0018:ffffa923d8067d20 EFLAGS: 00010286
Oct 31 14:46:04 lipc-carsus kernel: RAX: 00000000ffffffff RBX: ffff8a8d13f0eee8 RCX: 0000000000000000
Oct 31 14:46:04 lipc-carsus kernel: RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
Oct 31 14:46:04 lipc-carsus kernel: RBP: ffffa923d8067d50 R08: 0000000000000000 R09: 0000000000000000
Oct 31 14:46:04 lipc-carsus kernel: R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a8ddf627000
Oct 31 14:46:04 lipc-carsus kernel: R13: ffff8a8ddf627038 R14: 0000000000000000 R15: ffff8a8ddf627000
Oct 31 14:46:04 lipc-carsus kernel: FS: 00007f7c7b2ac800(0000) GS:ffff8a906c300000(0000) knlGS:0000000000000000
Oct 31 14:46:04 lipc-carsus kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Oct 31 14:46:04 lipc-carsus kernel: CR2: 000055b1b50e4400 CR3: 000000039631e002 CR4: 00000000003706e0
Oct 31 14:46:04 lipc-carsus kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Oct 31 14:46:04 lipc-carsus kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Oct 31 14:46:04 lipc-carsus kernel: Call Trace:
Oct 31 14:46:04 lipc-carsus kernel: <TASK>
Oct 31 14:46:04 lipc-carsus kernel: ? show_regs+0x72/0x90
Oct 31 14:46:04 lipc-carsus kernel: ? __cifs_put_smb_ses+0x3dd/0x4d0 [cifs]
Oct 31 14:46:04 lipc-carsu...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alex Ball (a-ball)]

ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ab318 2365 F.... pulseaudio
 /dev/snd/controlC0: ab318 2365 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
DistroRelease: KDE neon 22.04
HibernationDevice: RESUME=UUID=51ff5047-545a-4d60-bce1-cb029fc539f1
InstallationDate: Installed on 2019-02-07 (1727 days ago)
InstallationMedia: neon user "Bionic" - Build amd64 LIVE Binary 20190124-05:42
MachineType: Dell Inc. Latitude 5591
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-36-generic root=UUID=a05625f1-a3f6-4856-8b6f-5ba0fb066079 ro quiet splash dis_ucode_ldr nosgx resume=UUID=51ff5047-545a-4d60-bce1-cb029fc539f1 vt.handoff=7
ProcVersionSignature: Ubuntu 6.2.0-36.37~22.04.1-generic 6.2.16
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-6.2.0-36-generic N/A
 linux-backports-modules-6.2.0-36-generic N/A
 linux-firmware 20220329.git681281e4-0ubuntu3.21
Tags: jammy
Uname: Linux 6.2.0-36-generic x86_64
UpgradeStatus: Upgraded to jammy on 2022-10-25 (372 days ago)
UserGroups: N/A
_MarkForUpload: True
dmi.bios.date: 07/04/2023
dmi.bios.release: 1.28
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.28.0
dmi.board.name: 0DVVG1
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.28.0:bd07/04/2023:br1.28:svnDellInc.:pnLatitude5591:pvr:rvnDellInc.:rn0DVVG1:rvrA00:cvnDellInc.:ct10:cvr:sku0819:
dmi.product.family: Latitude
dmi.product.name: Latitude 5591
dmi.product.sku: 0819
dmi.sys.vendor: Dell Inc.

[Alex Ball (a-ball)]

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[Russell Coker (etbe-sm)]

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...

[Ken Sharp (kennybobs)]

Have you tried the upstream kernel?

Also see https://wiki.ubuntu.com/Kernel/Bugs

[Alex Ball (a-ball)]

I can confirm that this bug also occurs on Ubuntu kernels:

- 6.2.0-37.38~22.04.1
- 6.2.0-39.40~22.04.1

It does NOT occur on the corresponding upstream kernel 6.2.0-060200.

Are there any other kernels I should test?

[Alex Ball (a-ball)]

Since upgrading to the 6.5.0 Ubuntu HWE kernel a few weeks ago, I have not experienced this issue; so it looks like it is specific to the 6.2.0 Ubuntu kernel.