BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
IP: [<ffffffffa0276690>] encode_sequence+0x51/0x127 [nfs]
PGD 568fd067 PUD 4e5fd067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/virtual/net/pan0/flags
CPU 0 
Modules linked in: nfs lockd nfs_acl auth_rpcgss sco bridge stp llc bnep l2cap bluetooth sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 dm_multipath uinput virtio_net snd_ens1370 floppy gameport snd_rawmidi snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss pcspkr snd_pcm snd_timer snd soundcore i2c_piix4 snd_page_alloc i2c_core virtio_blk virtio_pci virtio_ring virtio [last unloaded: freq_table]
Pid: 12386, comm: bigfile Not tainted 2.6.29-0.138.rc5.git4.pnfs_022008.fc10.x86_64 #1 
RIP: 0010:[<ffffffffa0276690>]  [<ffffffffa0276690>] encode_sequence+0x51/0x127 [nfs]
RSP: 0018:ffff88004e473968  EFLAGS: 00010213
RAX: ffff88004e5c10b4 RBX: ffff88004e4ea6e8 RCX: ffff88004e5c10b0
RDX: ffff88004e4739c8 RSI: 0000000000000004 RDI: ffff88004e4739f8
RBP: ffff88004e4739b8 R08: ffff88004e5c14b8 R09: ffff88004e5c10b4
R10: ffff88004e5c10b0 R11: ffffffffa01aac5b R12: ffff88004e4739f8
R13: ffff88004e4ea690 R14: 0000000000000000 R15: ffff88004e4739c8
FS:  00007fb3cbae36f0(0000) GS:ffffffff8197d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000040 CR3: 00000000569f7000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process bigfile (pid: 12386, threadinfo ffff88004e472000, task ffff88004e460000)
Stack:
 ffff88004e460000 0000000000000000 ffff88004e5c0000 ffff88004e5c0670
 ffff88004e4739f8 ffff88004e4739c8 ffff88004e4739f8 ffff88004e4ea690
 ffff88004e5c10b0 ffff88005695a758 ffff88004e473a38 ffffffffa027c0e5
Call Trace:
 [<ffffffffa027c0e5>] nfs4_xdr_enc_open+0x7a/0xeb [nfs]
 [<ffffffff81051e12>] ? _local_bh_enable_ip+0xde/0xea
 [<ffffffffa01b0870>] rpcauth_wrap_req+0x7f/0x8c [sunrpc]
 [<ffffffffa027c06b>] ? nfs4_xdr_enc_open+0x0/0xeb [nfs]
 [<ffffffffa01a8d22>] call_transmit+0x1dd/0x25a [sunrpc]
 [<ffffffffa01afd4e>] __rpc_execute+0x7d/0x211 [sunrpc]
 [<ffffffffa01aff0f>] rpc_execute+0x2d/0x31 [sunrpc]
 [<ffffffffa01a982e>] rpc_run_task+0x5b/0x63 [sunrpc]
 [<ffffffffa026e3f7>] _nfs4_proc_open+0xe5/0x2e2 [nfs]
 [<ffffffff8107047f>] ? mark_lock+0x22/0x3ad
 [<ffffffff81070871>] ? mark_held_locks+0x67/0x83
 [<ffffffffa026dfdd>] ? nfs4_opendata_alloc+0x85/0x21a [nfs]
 [<ffffffff810ddf43>] ? kmem_cache_alloc+0xd0/0x102
 [<ffffffffa026ebfc>] nfs4_open_recover_helper+0x51/0x97 [nfs]
 [<ffffffffa026ec7c>] nfs4_open_recover+0x3a/0x11b [nfs]
 [<ffffffffa026f154>] nfs4_open_delegation_recall+0xb3/0x11e [nfs]
 [<ffffffff811a73ab>] ? _raw_spin_unlock+0x8e/0x93
 [<ffffffffa027f278>] __nfs_inode_return_delegation+0xdb/0x1d1 [nfs]
 [<ffffffffa027f3db>] nfs_inode_return_delegation+0x6d/0x79 [nfs]
 [<ffffffffa0255fc5>] nfs_sillyrename+0xb4/0x1f4 [nfs]
 [<ffffffffa02565f1>] nfs_unlink+0x95/0x1ee [nfs]
 [<ffffffff810f0266>] vfs_unlink+0x87/0xcf
 [<ffffffff810f19f0>] do_unlinkat+0xd2/0x162
 [<ffffffff81011fef>] ? retint_swapgs+0x2d/0x4f
 [<ffffffff81070a61>] ? trace_hardirqs_on_caller+0x12f/0x153
 [<ffffffff810963b9>] ? audit_syscall_entry+0x119/0x145
 [<ffffffff810f1a96>] sys_unlink+0x16/0x18
 [<ffffffff810113ba>] system_call_fastpath+0x16/0x1b
Code: 36 0f 84 eb 00 00 00 80 7e 08 ff 75 15 31 d2 be ac 06 00 00 48 c7 c7 a6 d6 28 a0 31 c0 e8 f4 5f dd e0 48 8b 7d d0 be 04 00 00 00 <4d> 8b 6e 40 44 8a 63 08 e8 11 10 f4 ff 48 85 c0 48 89 c2 75 04 
RIP  [<ffffffffa0276690>] encode_sequence+0x51/0x127 [nfs]
 RSP <ffff88004e473968>
CR2: 0000000000000040
---[ end trace 49cd70939416467d ]---