The server has crashed in mvfs_dncadd_subr+0xc8c

Issue

The server has crashed with the following in the kernel log:

Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: 
 [<ffffffff88ceca4b>] :mvfs:mvfs_dncadd_subr+0xc8c/0x14ed
PGD 7cd9fcb067 PUD 7c030dc067 PMD 0 
Oops: 0002 [1] SMP 
last sysfs file: /devices/pci0000:00/0000:00:00.0/class
CPU 75 
Modules linked in: ipmi_si mpt2sas scsi_transport_sas mptctl mptbase ipmi_devintf ipmi_msghandler dell_rbu
mvfs(U) vxodm(PFU) autofs4 nfs fscache nfs_acl dmpjbod(PU) dmpap(PU) dmpaa(PU) vxspec(PFU) vxio(PFU) vxdmp(PU)
lockd sunrpc bonding be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i cnic
ipv6 xfrm_nalgo crypto_api uio cxgb3i cxgb3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2
scsi_transport_iscsi vxportal(PFU) fdd(PFU) vxfs(PU) dm_multipath scsi_dh video backlight sbs power_meter
hwmon i2c_ec i2c_core dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev
sr_mod cdrom sg tpm_tis tpm tpm_bios i7core_edac bnx2 pcspkr edac_mc serio_raw dm_raid45 dm_message
dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod usb_storage lpfc scsi_transport_fc
ata_piix libata shpchp megaraid_sas sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 14968, comm: perl Tainted: PF     2.6.18-238.el5 #1
RIP: 0010:[<ffffffff88ceca4b>]  [<ffffffff88ceca4b>] :mvfs:mvfs_dncadd_subr+0xc8c/0x14ed
RSP: 0018:ffff811da45a7a08  EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffffc2001a614b10 RCX: ffff817cd47a3eac
RDX: ffffc2001ab27120 RSI: ffff81608029c1c0 RDI: ffffffff88d441e0
RBP: ffffc2001a614b10 R08: ffff817c6208db10 R09: 0000000000000000
R10: ffff8160f04bbc10 R11: 0000000000000080 R12: 00000000ffffffff
R13: 0000000000000000 R14: ffff815b6dcc4768 R15: ffff815b6dcc4768
FS:  00002b65888f76e0(0000) GS:ffff81807f803bc0(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000007ccadba000 CR4: 00000000000006e0
Process perl (pid: 14968, threadinfo ffff811da45a6000, task ffff811d9a6467a0)
Stack:  0000000000395ccb ffff815b0000000a 000281807e6428a0 ffff811da45a7ae8
 0000000400000000 ffff817cd47a3eac 00000001d1d9c088 ffff815b6dcc4768
 ffff817cd1d9c2e8 ffff81407fd1f300 0000000000395cca ffff815e0000000a
Call Trace:
 [<ffffffff88ced484>] :mvfs:mfs_dncadd+0x12e/0x13f
 [<ffffffff88d002f2>] :mvfs:xdr_view_lookup_req_t+0x0/0x66
 [<ffffffff88cf292d>] :mvfs:mfs_clnt_lookup+0x811/0xca7
 [<ffffffff88cccc0f>] :mvfs:mvfs_lookup_ctx+0x856/0xbad
 [<ffffffff88cd9d15>] :mvfs:mvfs_mythread+0xa8/0x878
 [<ffffffff88d0216c>] :mvfs:mvfs_linux_lookup_wrapper+0xff/0x110
 [<ffffffff88d05d8f>] :mvfs:vnode_iop_lookup+0x74/0x468
 [<ffffffff8000d008>] do_lookup+0xe5/0x1e6
 [<ffffffff80009c3a>] __link_path_walk+0x39f/0xfb9
 [<ffffffff8000ea74>] link_path_walk+0x42/0xb2
 [<ffffffff8000cda3>] do_path_lookup+0x275/0x2f1
 [<ffffffff80012898>] getname+0x15b/0x1c2
 [<ffffffff800239b0>] __user_walk_fd+0x37/0x4c
 [<ffffffff800288aa>] vfs_stat_fd+0x1b/0x4a
 [<ffffffff800dcf9b>] shmem_file_write+0x23f/0x251
 [<ffffffff800236e2>] sys_newstat+0x19/0x31
 [<ffffffff8005d229>] tracesys+0x71/0xe0
 [<ffffffff8005d28d>] tracesys+0xd5/0xe0
Code: 48 89 10 48 c7 03 00 00 00 00 75 15 83 bb c8 00 00 00 00 75 
RIP  [<ffffffff88ceca4b>] :mvfs:mvfs_dncadd_subr+0xc8c/0x14ed
 RSP <ffff811da45a7a08>