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[Bug 992678] Re: 3.2.0-24-virtual rejects sec=krb5p NFS mount option

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Sergio Gelato <Sergio.Gelato@xxxxxxxxxxx>
Date: Fri, 25 Jul 2014 14:32:29 -0000
Reply-to: Bug 992678 <992678@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

*** This bug is a duplicate of bug 769527 ***
    https://bugs.launchpad.net/bugs/769527

** This bug has been marked a duplicate of bug 769527
   Missing rpcsec_gss_krb5 module

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https://bugs.launchpad.net/bugs/992678

Title:
  3.2.0-24-virtual rejects sec=krb5p NFS mount option

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  # uname -a
  Linux client 3.2.0-24-virtual #37-Ubuntu SMP Wed Apr 25 12:51:49 UTC 2012 i686 i686 i386 GNU/Linux
  # mount -v -t nfs -o sec=krb5p server:/srv/nfs/k /mnt
  mount.nfs: timeout set for Tue May  1 17:46:30 2012
  mount.nfs: trying text-based options 'sec=krb5p,vers=4,addr=192.168.0.10,clientaddr=192.168.0.20'
  mount.nfs: mount(2): Invalid argument
  mount.nfs: an incorrect mount option was specified

  If I boot the same VM using 3.2.0-24-generic-pae (no other changes),
  the mount succeeds.

  sec=sys NFS mounts work just fine with either kernel.

  After each failed mount attempt, dmesg says:
  gss_create: Pseudoflavor 390005 not found!
  RPC: Couldn't create auth handle (flavor 390005)

  Additional info:
  # cat /proc/version_signature
  Ubuntu 3.2.0-24.37-virtual 3.2.14

  lspci -vnvn produces no output. This is running as a guest on a Debian
  squeeze Xen 4.0.1 host.

  The auth_rpcgss module is loaded:
  # lsmod
  Module                  Size  Used by
  autofs4                27969  31 
  xt_tcpudp              12531  14 
  nf_conntrack_ipv4      19084  5 
  nf_defrag_ipv4         12649  1 nf_conntrack_ipv4
  xt_state               12514  5 
  nf_conntrack           73847  2 nf_conntrack_ipv4,xt_state
  iptable_filter         12706  1 
  ip_tables              18106  1 iptable_filter
  x_tables               21974  4 xt_tcpudp,xt_state,iptable_filter,ip_tables
  nfsd                  229850  2 
  nfs                   307289  0 
  lockd                  78804  2 nfsd,nfs
  fscache                50642  1 nfs
  auth_rpcgss            39597  2 nfsd,nfs
  nfs_acl                12771  2 nfsd,nfs
  sunrpc                205647  6 nfsd,nfs,lockd,auth_rpcgss,nfs_acl
  ext2                   67987  1 
  lp                     17455  0 
  parport                40930  1 lp

  Comparing the kernel config files in /boot shows only these
  differences:

  -CONFIG_VERSION_SIGNATURE="Ubuntu 3.2.0-24.37-generic-pae 3.2.14"
  +CONFIG_VERSION_SIGNATURE="Ubuntu 3.2.0-24.37-virtual 3.2.14"
  -CONFIG_PHYSICAL_START=0x1000000
  +CONFIG_PHYSICAL_START=0x100000
  -CONFIG_PHYSICAL_ALIGN=0x1000000
  +CONFIG_PHYSICAL_ALIGN=0x100000
  -CONFIG_INTEL_IDLE=y
  +# CONFIG_INTEL_IDLE is not set

  dmesg says:
  gss_create: Pseudoflavor 390005 not found!
  RPC: Couldn't create auth handle (flavor 390005)

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