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[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

** Also affects: linux (Ubuntu Precise)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1344405

Title:
  Kernel missing /proc/keys

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Precise:
  New
Status in “linux” source package in Trusty:
  Fix Released
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  lsb_release -rd
  Description:       Ubuntu 14.04 LTS
  Release:              14.04

  apt-cache policy linux-generic

  linux-generic:
    Installed: 3.13.0.24.28
    Candidate: 3.13.0.32.38
    Version table:
       3.13.0.32.38 0
          500 http://ca.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
   *** 3.13.0.24.28 0
          500 http://ca.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  -------------------------

  When attempting to clear NFS uid/gid cache I ran nfsidmap -c

  expected Result
  no response, nfsidmap does not return anything if it completes properly
  example:

  [root@quebec ~]# nfsidmap -c
  [root@quebec ~]#

  What did happen

  root@u1404vm:~# nfsidmap -c
  nfsidmap: fopen(/proc/keys) failed: No such file or directory

  I checked /proc and the /proc/key-users file and the
  /proc/sys/kernel/keys directory were there.

  I Looked up Kernel Key Management and saw that /proc/keys was needed
  to hold the key pairs used by the kernel.

   From Google'ng the following kernel option needs to be enabled

  CONFIG_KEYS_DEBUG_PROC_KEY

  or /proc/keys does not get created.

  I checked /boot/config-3.13.0-24-generic and that option is not
  enabled.

  I checked this on both Centos 6.5/7 and Mageia and they are enabled
  and /proc/keys exist, nfsidmap -c works.

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