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[Patrice <patrice@xxxxxxxxxxxx>]

Public bug reported:

After updating  rsyslog from 7.4.4-1ubuntu2 to 7.4.4-1ubuntu2.1 the rsyslogd process started to take all the CPU on my machine.
The modification made by this release is described in #1274444, it is the activation of KLogPermitNonKernelFacility option.
I don't know exactly of is the effect of this option but it seems to have a permanent effect : even after downgrading the package or manually removing the option from /etc/rsyslog.conf the issue remains.
My syslog is full of :
Sep  8 10:28:40 sentry rsyslogd: imklog: error reading kernel log - shutting down: Bad file descriptor
Sep  8 10:28:40 sentry rsyslogd: message repeated 498 times: [imklog: error reading kernel log - shutting down: Bad file descriptor]
Sep  8 10:28:46 sentry rsyslogd-2177: rsyslogd[internal_messages]: 519517 messages lost due to rate-limiting
I guess this is what causes the CPU load.

I am running Ubuntu 14.04.1 LTS in an OpenVZ container on Proxmox 3.2.
The kernel is 2.6.32-28-pve

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: regression-update

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https://bugs.launchpad.net/bugs/1366829

Title:
  Updating to rsyslog - 7.4.4-1ubuntu2.1 makes rsyslogd to take all the
  CPU

Status in “linux” package in Ubuntu:
  New

Bug description:
  After updating  rsyslog from 7.4.4-1ubuntu2 to 7.4.4-1ubuntu2.1 the rsyslogd process started to take all the CPU on my machine.
  The modification made by this release is described in #1274444, it is the activation of KLogPermitNonKernelFacility option.
  I don't know exactly of is the effect of this option but it seems to have a permanent effect : even after downgrading the package or manually removing the option from /etc/rsyslog.conf the issue remains.
  My syslog is full of :
  Sep  8 10:28:40 sentry rsyslogd: imklog: error reading kernel log - shutting down: Bad file descriptor
  Sep  8 10:28:40 sentry rsyslogd: message repeated 498 times: [imklog: error reading kernel log - shutting down: Bad file descriptor]
  Sep  8 10:28:46 sentry rsyslogd-2177: rsyslogd[internal_messages]: 519517 messages lost due to rate-limiting
  I guess this is what causes the CPU load.

  I am running Ubuntu 14.04.1 LTS in an OpenVZ container on Proxmox 3.2.
  The kernel is 2.6.32-28-pve

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