Public bug reported:
I mount a CIFS filesystem with Kerberos after logging in with an Active
Directory domain account (which creates the Kerberos ticket with a 10
hour expiry - the default for Active Directory). When the ticket expires
I get lots of messages like the following and a kernel thread for CIFS
using 100% of a CPU core. This problem is not resolved on umount or
after any reasonable length of time (I've had machines in that state for
over a week).
This happens with Ubuntu 22.04 with the latest kernel as well as with
20.04 with the generic kernel, the OEM kernel, and the HWE kernel.
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750474] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750475] CIFS: VFS: \\AD-6-ACT.sm.local
Send error in SessSet
up = -126
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750480] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750481] CIFS: VFS: \\AD-6-ACT.sm.local
Send error in SessSet
up = -126
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750485] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750487] CIFS: VFS: \\AD-6-ACT.sm.local
Send error in SessSet
up = -126
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754469] SMB2_auth_kerberos: 1423149
callbacks suppressed
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754473] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754477] cifs_setup_session: 1423149
callbacks suppressed
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754479] CIFS: VFS: \\AD-6-ACT.sm.local
Send error in SessSet
up = -126
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754484] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-52-generic 5.15.0-52.58
ProcVersionSignature: Ubuntu 5.15.0-52.58-generic 5.15.60
Uname: Linux 5.15.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: russell.coker 2859 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu Nov 3 11:44:17 2022
InstallationDate: Installed on 2022-05-13 (173 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64
(20210209.1)
MachineType: Dell Inc. Precision 3560
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-52-generic
root=UUID=8d80bec3-0520-4486-aac5-2b688f71ce12 ro rootflags=subvol=22.04 nosmt
RelatedPackageVersions:
linux-restricted-modules-5.15.0-52-generic N/A
linux-backports-modules-5.15.0-52-generic N/A
linux-firmware 20220329.git681281e4-0ubuntu3.6
SourcePackage: linux
UpgradeStatus: Upgraded to jammy on 2022-07-01 (124 days ago)
WifiSyslog:
dmi.bios.date: 09/07/2022
dmi.bios.release: 1.23
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.23.0
dmi.board.name: 04RH8K
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.23.0:bd09/07/2022:br1.23:svnDellInc.:pnPrecision3560:pvr:rvnDellInc.:rn04RH8K:rvrA00:cvnDellInc.:ct10:cvr:sku0A22:
dmi.product.family: Precision
dmi.product.name: Precision 3560
dmi.product.sku: 0A22
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy
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https://bugs.launchpad.net/bugs/1995539
Title:
kernel infinite loop on Kerberos CIFS mount when ticket expires
Status in linux package in Ubuntu:
New
Bug description:
I mount a CIFS filesystem with Kerberos after logging in with an
Active Directory domain account (which creates the Kerberos ticket
with a 10 hour expiry - the default for Active Directory). When the
ticket expires I get lots of messages like the following and a kernel
thread for CIFS using 100% of a CPU core. This problem is not resolved
on umount or after any reasonable length of time (I've had machines in
that state for over a week).
This happens with Ubuntu 22.04 with the latest kernel as well as with
20.04 with the generic kernel, the OEM kernel, and the HWE kernel.
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750474] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750475] CIFS: VFS:
\\AD-6-ACT.sm.local Send error in SessSet
up = -126
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750480] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750481] CIFS: VFS:
\\AD-6-ACT.sm.local Send error in SessSet
up = -126
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750485] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:48:56 u3d05ng3 kernel: [81347.750487] CIFS: VFS:
\\AD-6-ACT.sm.local Send error in SessSet
up = -126
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754469] SMB2_auth_kerberos: 1423149
callbacks suppressed
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754473] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754477] cifs_setup_session: 1423149
callbacks suppressed
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754479] CIFS: VFS:
\\AD-6-ACT.sm.local Send error in SessSet
up = -126
Nov 3 07:49:01 u3d05ng3 kernel: [81352.754484] CIFS: VFS: Verify user has a
krb5 ticket and keyutil
s is installed
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-52-generic 5.15.0-52.58
ProcVersionSignature: Ubuntu 5.15.0-52.58-generic 5.15.60
Uname: Linux 5.15.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: russell.coker 2859 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu Nov 3 11:44:17 2022
InstallationDate: Installed on 2022-05-13 (173 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64
(20210209.1)
MachineType: Dell Inc. Precision 3560
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-52-generic
root=UUID=8d80bec3-0520-4486-aac5-2b688f71ce12 ro rootflags=subvol=22.04 nosmt
RelatedPackageVersions:
linux-restricted-modules-5.15.0-52-generic N/A
linux-backports-modules-5.15.0-52-generic N/A
linux-firmware 20220329.git681281e4-0ubuntu3.6
SourcePackage: linux
UpgradeStatus: Upgraded to jammy on 2022-07-01 (124 days ago)
WifiSyslog:
dmi.bios.date: 09/07/2022
dmi.bios.release: 1.23
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.23.0
dmi.board.name: 04RH8K
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.23.0:bd09/07/2022:br1.23:svnDellInc.:pnPrecision3560:pvr:rvnDellInc.:rn04RH8K:rvrA00:cvnDellInc.:ct10:cvr:sku0A22:
dmi.product.family: Precision
dmi.product.name: Precision 3560
dmi.product.sku: 0A22
dmi.sys.vendor: Dell Inc.
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