kworker failure every time vsftpd has login

[Paul Crowley]

When a connection is made to vsftpd and a anonymous user logs in, this failure occurs. 100% of the time.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-37-generic 3.13.0-37.64
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
Date: Wed Oct 29 14:56:44 2014
HibernationDevice: RESUME=UUID=f73a7b55-f1b8-48de-880d-7682e4d6a0b9
IwConfig:
 eth0 no wireless extensions.

 eth1 no wireless extensions.

 lo no wireless extensions.
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: root=UUID=d5889fe5-37d5-4e65-a815-1b7daee05e80 ro console=hvc0 splash quiet $vt_handoff -- quiet console=hvc0
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-37-generic N/A
 linux-backports-modules-3.13.0-37-generic N/A
 linux-firmware 1.127.7
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-09-10 (48 days ago)
---
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=f73a7b55-f1b8-48de-880d-7682e4d6a0b9
IwConfig:
 eth0 no wireless extensions.

 eth1 no wireless extensions.

 lo no wireless extensions.
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
Package: linux (not installed)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: root=UUID=d5889fe5-37d5-4e65-a815-1b7daee05e80 ro console=hvc0 splash quiet $vt_handoff -- quiet console=hvc0
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-37-generic N/A
 linux-backports-modules-3.13.0-37-generic N/A
 linux-firmware 1.127.7
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty
Uname: Linux 3.13.0-37-generic x86_64
UpgradeStatus: Upgraded to trusty on 2014-09-10 (48 days ago)
UserGroups: lpadmin
_MarkForUpload: True

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1387352

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Paul Crowley (paul-crowley)]

apport information

[Joseph Salisbury (jsalisbury)]

Did this issue occur in a previous version of Ubuntu, or is this a new issue?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.18 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc2-utopic/

[Paul Crowley (paul-crowley)]

With the 3.18.0 kernel the problem does not occur.