I get the following on 2.5.62 when I mount over NFS:

Feb 21 19:45:00 elm3b78 kernel: Oops: 0002
Feb 21 19:45:00 elm3b78 kernel: CPU:    6
Feb 21 19:45:00 elm3b78 kernel: EIP:    0060:[<c035c4c3>]    Not tainted
Feb 21 19:45:00 elm3b78 kernel: EFLAGS: 00010246
Feb 21 19:45:00 elm3b78 kernel: EIP is at rpc_depopulate+0x33/0x110
Feb 21 19:45:00 elm3b78 kernel: eax: 00000000   ebx: 0000006c   ecx: 0000006c   edx: f69f42c0
Feb 21 19:45:00 elm3b78 kernel: esi: f6bc9bf0   edi: f6bc9bf0   ebp: f6bc9c04   esp: f6bc9be0
Feb 21 19:45:00 elm3b78 kernel: ds: 007b   es: 007b   ss: 0068
Feb 21 19:45:00 elm3b78 kernel: Process mount (pid: 1193, threadinfo=f6bc8000 task=f668b920)
Feb 21 19:45:00 elm3b78 kernel: Stack: c036a428 00000077 c0157e30 00000000 f6bc9bf0 f6bc9bf0 f701ae60 f701ae60 
Feb 21 19:45:00 elm3b78 kernel:        f66c4dc0 f6bc9c3c c035ca15 f701ae60 f69f42c0 f7ff9b60 f6bc9ce8 00000000 
Feb 21 19:45:00 elm3b78 kernel:        f6bc9c30 00000010 00000001 00000000 f73dd540 f6bc9ce8 00000000 f6bc9c4c 
Feb 21 19:45:00 elm3b78 kernel: Call Trace:
Feb 21 19:45:01 elm3b78 kernel:  [<c0157e30>] lookup_hash+0x70/0xa0
Feb 21 19:45:01 elm3b78 kernel:  [<c035ca15>] rpc_rmdir+0x65/0xa0
Feb 21 19:45:01 elm3b78 kernel:  [<c034ddd6>] rpc_destroy_client+0x46/0x70
Feb 21 19:45:01 elm3b78 kernel:  [<c034de4b>] rpc_release_client+0x4b/0x60
Feb 21 19:45:01 elm3b78 kernel:  [<c0352957>] rpc_release_task+0x1a7/0x1d0
Feb 21 19:45:01 elm3b78 kernel:  [<c03522db>] __rpc_execute+0x35b/0x370
Feb 21 19:45:01 elm3b78 kernel:  [<c0119900>] default_wake_function+0x0/0x20
Feb 21 19:45:01 elm3b78 kernel:  [<c034dfe4>] rpc_call_sync+0x64/0xa0
Feb 21 19:45:01 elm3b78 kernel:  [<c034dff7>] rpc_call_sync+0x77/0xa0
Feb 21 19:45:01 elm3b78 kernel:  [<c0351440>] rpc_run_timer+0x0/0xa0
Feb 21 19:45:01 elm3b78 kernel:  [<c035941b>] rpc_register+0xcb/0x100
Feb 21 19:45:01 elm3b78 kernel:  [<c0354af4>] svc_register+0x94/0x100
Feb 21 19:45:01 elm3b78 kernel:  [<c0354714>] svc_create+0xd4/0xe0
Feb 21 19:45:01 elm3b78 kernel:  [<c01b5069>] lockd_up+0x69/0x130
Feb 21 19:45:01 elm3b78 kernel:  [<c01a28b4>] nfs_fill_super+0x364/0x390
Feb 21 19:45:01 elm3b78 kernel:  [<c01a434d>] nfs_get_sb+0x1ed/0x230
Feb 21 19:45:01 elm3b78 kernel:  [<c0151592>] do_kern_mount+0x42/0xa0
Feb 21 19:45:01 elm3b78 kernel:  [<c0164d23>] do_add_mount+0x73/0x170
Feb 21 19:45:01 elm3b78 kernel:  [<c01349b6>] __alloc_pages+0x96/0x2e0
Feb 21 19:45:01 elm3b78 kernel:  [<c0165037>] do_mount+0x147/0x160
Feb 21 19:45:01 elm3b78 kernel:  [<c01654b8>] sys_mount+0xa8/0x110
Feb 21 19:45:01 elm3b78 kernel:  [<c010909b>] syscall_call+0x7/0xb
Feb 21 19:45:01 elm3b78 kernel: 
Feb 21 19:45:01 elm3b78 kernel: Code: f0 ff 48 6c 0f 88 bf 09 00 00 59 5b f0 fe 0d 60 a6 47 c0 0f