Kernel panic with 'EIP is at svc_expkey_lookup+0xf2/0x330 [nfsd]'

Issue

• Kernel panic with 'EIP is at svc_expkey_lookup+0xf2/0x330 [nfsd]'

• The Server panic with the below messages.

  xx kernel:  printing eip:
  xx kernel: f8bcc0d7
  xx kernel: *pde = 00000120
  xx kernel: Oops: 0000 [#1]
  xx kernel: SMP 
  xx kernel: CPU:    0
  xx kernel: EIP:    0060:[<f8bcc0d7>]    Not tainted VLI
  xx kernel: EFLAGS: 00010282   (2.6.9-22.ELsmp) 
  xx kernel: EIP is at svc_expkey_lookup+0xf2/0x330 [nfsd]
  xx kernel: eax: f8beee48   ebx: f97cff8c   ecx: 00000000   edx: 00000000
  xx kernel: esi: eed6fed0   edi: 00000000   ebp: d7a6d240   esp: eed6feac
  xx 007b   ss: 0068
  xx kernel: Process nfsd (pid: 13345, threadinfo=eed6f000 task=f2211130)
  xx kernel: Stack: 0000000a 00000008 f8bf0b80 00000000 00000004 eee1f010 eed6fef4 11270000 
  xx kernel:        f8bcca90 f651d318 f6ef00f0 00000000 c565c6c0 c565bd60 c5b434c0 00000000 
  xx kernel:        0000fd00 02c09042 c031ea80 00000286 00000286 eee1f000 f7cebf50 f8bc7e05 
  xx kernel: Call Trace:
  xx kernel:  [<f8bcca90>] exp_find_key+0x5d/0x9b [nfsd]
  xx kernel:  [<f8bc7e05>] fh_verify+0x197/0x5bd [nfsd]
  xx kernel:  [<f8b7827b>] svcauth_unix_set_client+0xa7/0xb5 [sunrpc]
  xx kernel:  [<f8bcb884>] nfsd_statfs+0x10/0x3d [nfsd]
  xx kernel:  [<f8bd117d>] nfsd3_proc_fsstat+0x32/0x43 [nfsd]
  xx kernel:  [<f8bd1e06>] nfs3svc_decode_fhandle+0x0/0x8f [nfsd]
  xx kernel:  [<f8bc667a>] nfsd_dispatch+0xba/0x170 [nfsd]
  xx kernel:  [<f8b75429>] svc_process+0x41b/0x6ce [sunrpc]
  xx kernel:  [<f8bc645a>] nfsd+0x1cc/0x332 [nfsd]
  xx kernel:  [<f8bc628e>] nfsd+0x0/0x332 [nfsd]
  xx kernel:  [<c01041f1>] kernel_thread_helper+0x5/0xb