Description of problem:
I got this when I was attempting a git commit to an NFS directory.

Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.324184] ------------[ cut here ]------------
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] kernel BUG at fs/nfs/nfs3xdr.c:1338!
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] invalid opcode: 0000 [#1] SMP
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:05.0/drm/card0/card0-VGA-1/status
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] CPU 0
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc cpufreq_ondemand powernow_k8 freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables snd_hda_codec_hdmi sp5100_tco snd_hda_codec_realtek snd_hda_intel wmi nosy snd_hda_codec edac_core i2c_piix4 snd_hwdep snd_seq snd_seq_device serio_raw shpchp edac_mce_amd snd_pcm tg3 snd_timer snd soundcore snd_page_alloc mlx4_core microcode k10temp configfs kvm_amd kvm ipv6 usb_storage pata_acpi ata_generic uas firewire_ohci pata_atiixp firewire_core crc_itu_t radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] Pid: 2269, comm: vi Not tainted 2.6.38-0.rc2.git3.2.fc15.x86_64 #1 To be filled by O.E.M./To Be Filled By O.E.M.
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] RIP: 0010:[<ffffffffa03e502b>]  [<ffffffffa03e502b>] nfs3_xdr_enc_setacl3args+0x7b/0xb5 [nfs]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] RSP: 0018:ffff8800cf7bf9f8  EFLAGS: 00010282
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] RAX: 00000000ffffffea RBX: ffff8800cf7bfc28 RCX: 0000000000000004
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] RDX: 0000000000000004 RSI: ffff8800cf7bf8e0 RDI: ffff880114672648
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] RBP: ffff8800cf7bfa18 R08: 0000000000000001 R09: 0000000000000000
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] R10: 00000000000006cd R11: ffff8800cf7bfc28 R12: ffff8800cf7bfa40
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] R13: 0000000000000098 R14: ffff8801037603c0 R15: ffffffffa03e4fb0
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] FS:  00007f650db437c0(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] CR2: 00000000004674f1 CR3: 00000000cf7e2000 CR4: 00000000000006f0
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] Process vi (pid: 2269, threadinfo ffff8800cf7be000, task ffff8801034edc80)
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] Stack:
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  ffff880114672640 ffff880113cad100 ffff880107a70088 ffff880114672640
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  ffff8800cf7bfaa8 ffffffffa034bc24 ffff88010340b540 ffff8800cf7bfc28
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  ffff8800cf7bfa48 ffff880107a700a0 ffff880114672648 ffff880107a701d8
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] Call Trace:
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa034bc24>] rpcauth_wrap_req+0x9f/0xb0 [sunrpc]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa03449f4>] call_transmit+0x1df/0x25d [sunrpc]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa034aba7>] __rpc_execute+0x83/0x1db [sunrpc]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa034ad6c>] rpc_execute+0x3f/0x43 [sunrpc]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa0344dd6>] rpc_run_task+0xeb/0xf7 [sunrpc]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa0344ecf>] rpc_call_sync+0x45/0x66 [sunrpc]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa03e5b6f>] nfs3_proc_setacls+0x1d3/0x2ac [nfs]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa03e6231>] nfs3_proc_setacl+0xbc/0xd5 [nfs]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffffa03e6329>] nfs3_setxattr+0x84/0x9f [nfs]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff8113b79d>] __vfs_setxattr_noperm+0x3d/0xba
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff8113b898>] vfs_setxattr+0x7e/0x9c
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff8113b985>] setxattr+0xcf/0x101
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff81129f76>] ? putname+0x34/0x36
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff8112c5d3>] ? user_path_at+0x65/0x94
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff81041445>] ? should_resched+0xe/0x2d
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff81129953>] ? path_put+0x1f/0x23
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff8112077c>] ? sys_fchmodat+0xa8/0xbb
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff8113ba24>] sys_setxattr+0x6d/0x92
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  [<ffffffff81009bc2>] system_call_fastpath+0x16/0x1b
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] Code: f6 43 08 01 45 8b 6d 40 74 04 48 8b 4b 10 49 8b 7c 24 08 48 8b 13 45 31 c9 41 b8 01 00 00 00 44 89 ee e8 6d 32 fb ff 85 c0 79 02 <0f> 0b 31 c9 f6 43 08 04 74 04 48 8b 4b 18 49 8b 7c 24 08 48 8b
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081] RIP  [<ffffffffa03e502b>] nfs3_xdr_enc_setacl3args+0x7b/0xb5 [nfs]
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.325081]  RSP <ffff8800cf7bf9f8>
Jan 27 15:56:50 fenlason-lab4 kernel: [ 3560.494610] ---[ end trace 1d4914dfd363fd40 ]---


Version-Release number of selected component (if applicable):
kernel-2.6.38-0.rc2.git3.2.fc15.x86_64


How reproducible:
It's only happened once so far.

Steps to Reproduce:
1."git commit" on an NFS-mounted git directory.
2.Create log message, exit editor
3.boom
  
Actual results:
kernel BUG

Expected results:
no bug

Additional info: