Kernel panic in ocfs2_dentry_attach_lock() function.

Issue

• Kernel panic with following call traces.

Kernel BUG at ...uilddir/build/BUILD/ocfs2-1.4.10/fs/ocfs2/dcache.c:234
invalid opcode: 0000 [1] SMP 
last sysfs file: /devices/pci0000:00/0000:00:0e.0/0000:02:00.0/host1/rport-1:0-2/target1:0:0/1:0:0:25/timeout
CPU 6 
Modules linked in: hangcheck_timer mptctl mptbase ipmi_watchdog ipmi_devintf ipmi_si ipmi_msghandler oracleasm(U) autofs4 ocfs2(U) ocfs2_dlmfs(U) ocfs2_dlm(U) ocfs2_nodemanager(U) configfs 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 libcxgbi cxgb3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi dm_round_robin scsi_dh_emc dm_multipath scsi_dh video backlight sbs power_meter i2c_ec i2c_core dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport st sg k10temp amd64_edac_mod tpm_tis tpm hwmon pcspkr ide_cd edac_mc hpilo serio_raw tpm_bios bnx2 qla2xxx cdrom dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod lpfc scsi_transport_fc shpchp cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 29601, comm: bpbkar Tainted: G     --------------------    2.6.18-371.el5 #1
RIP: 0010:[<ffffffff888a7d79>]  [<ffffffff888a7d79>] :ocfs2:ocfs2_dentry_attach_lock+0x17a/0x5d0
RSP: 0018:ffff811f46e39c68  EFLAGS: 00010282
RAX: 0000000000000089 RBX: 0000000102000000 RCX: ffffffff803270a8
RDX: ffffffff803270a8 RSI: 0000000000000000 RDI: ffffffff803270a0
RBP: ffff811f37306200 R08: ffffffff803270a8 R09: 0000000000000033
R10: ffff811f46e398e8 R11: 0000000000000080 R12: 00000000004ec58d
R13: ffff811f39d6f3d8 R14: ffff811f2e25ed20 R15: ffff811f36d3a660
FS:  00002adfb08c73f0(0000) GS:ffff81207fe31ec0(0063) knlGS:00000000f728e9e0
CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: 000000000853d054 CR3: 0000001f45828000 CR4: 00000000000006e0
Process bpbkar (pid: 29601, threadinfo ffff811f46e38000, task ffff811f4748f830)
Stack:  ffff811f36d3a660 ffff811f36d3a200 ffff811f36d3a660 ffff811f39d6f3d8
 ffff811f39d6f3d8 ffff811f2e25ed20 ffff811f46e39d48 ffffffff888cfe2e
 ffff811f2774f300 0000000002dc6a7d ffff811f26b5dc48 ffff811f2774f300
Call Trace:
 [<ffffffff888cfe2e>] :ocfs2:ocfs2_lookup+0x25b/0x388
 [<ffffffff8000d0de>] do_lookup+0x14a/0x24b
 [<ffffffff8000a2a3>] __link_path_walk+0x9f4/0xf39
 [<ffffffff800479bc>] sock_aio_write+0x4f/0x5e
 [<ffffffff8000eba2>] link_path_walk+0x45/0xb8
 [<ffffffff8000ce13>] do_path_lookup+0x294/0x311
 [<ffffffff800129da>] getname+0x15b/0x1c2
 [<ffffffff80023f96>] __user_walk_fd+0x37/0x4c
 [<ffffffff8003f5cf>] vfs_lstat_fd+0x18/0x47
 [<ffffffff800ffa1a>] compat_filldir64+0x0/0xb8
 [<ffffffff888ab750>] :ocfs2:ocfs2_readdir+0x1a0/0x211
 [<ffffffff800862a6>] sys32_lstat64+0x11/0x29
 [<ffffffff800616c2>] cstar_tracesys+0x4b/0x8d
 [<ffffffff80061624>] cstar_do_call+0x1b/0x6e


Code: 0f 0b 68 05 93 8e 88 c2 ea 00 eb fe 31 d2 4c 89 e6 4c 89 ff 
RIP  [<ffffffff888a7d79>] :ocfs2:ocfs2_dentry_attach_lock+0x17a/0x5d0
 RSP <ffff811f46e39c68>