RHEL6: Panic in wait_for_key_construction with nfs4

Solution Verified - Updated -

Issue

  • System panics with RIP value "wait_for_key_construction", with a BUG line that looks like a base pointer of 0 is being dereferenced (Note the relatively small value given in the 'BUG' line):
BUG: unable to handle kernel NULL pointer dereference at 0000000000000070
...
RIP: 0010:[<ffffffff81219011>]  [<ffffffff81219011>] wait_for_key_construction+0x31/0x80

Environment

  • Red Hat Enterprise Linux 6
    • All RHEL6 kernels may be affected
    • Seen on the following kernels: 2.6.32-279.*el6, 2.6.32-358.*el6
  • NFSv4
    • Seen on NFS client

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