Server crashed with ipmi_msghandler call "ipmi_msghandler:version_file_read_proc" on Red Hat Enterprise Linux 5.3

Issue

• Server crashed with below backtrace

ipmi message handler version 39.0
ipmi message handler version 39.0
ipmi device interface
IPMI System Interface driver.
ipmi_si: Trying SMBIOS-specified KCS state machine at I/O address 0xca2, slave address 0x20, irq 0
ipmi: Found new BMC (man_id: 0x00000b,  prod_id: 0x2020, dev_id: 0x11)
 IPMI KCS interface initialized
ipmi_si: Trying ACPI-specified KCS state machine at I/O address 0xca2, slave address 0x0, irq 0
ipmi_si: duplicate interface
GSI 21 sharing vector 0x8A and IRQ 21
ACPI: PCI Interrupt 0000:01:04.6[A] -> GSI 21 (level, low) -> IRQ 138
ipmi_si: Trying PCI-specified KCS state machine at memory address 0xf1ef0000, slave address 0x0, irq 138
ipmi_si: Using PCI Plug and Play interrupt 138
kobject_add failed for ipmi_bmc.17 with -EEXIST, don't try to register things with the same name in the same directory.

Call Trace:
 [<ffffffff801497ae>] kobject_add+0x16e/0x199
 [<ffffffff88634be0>] :ipmi_msghandler:version_file_read_proc+0x0/0x20
 [<ffffffff801b5443>] device_add+0x85/0x372
 [<ffffffff801b8667>] platform_device_add+0x111/0x148
 [<ffffffff886355ad>] :ipmi_msghandler:ipmi_register_smi+0x5cc/0xab7
 [<ffffffff8009db21>] autoremove_wake_function+0x0/0x2e
 [<ffffffff88652475>] :ipmi_si:try_smi_init+0x494/0x685
 [<ffffffff88653533>] :ipmi_si:ipmi_pci_probe+0xa0/0x17f
 [<ffffffff8015504a>] pci_device_probe+0x104/0x184
 [<ffffffff801b6df8>] driver_probe_device+0x52/0xaa
 [<ffffffff801b6f27>] __driver_attach+0x65/0xb6
 [<ffffffff801b6ec2>] __driver_attach+0x0/0xb6
 [<ffffffff801b6741>] bus_for_each_dev+0x43/0x6e
 [<ffffffff801b6387>] bus_add_driver+0x7e/0x130
 [<ffffffff80155222>] __pci_register_driver+0x4b/0x6c
 [<ffffffff88653308>] :ipmi_si:init_ipmi_si+0x5c2/0x73f
 [<ffffffff800a3e5d>] sys_init_module+0xaf/0x1e8
 [<ffffffff8005d116>] system_call+0x7e/0x83

ipmi_msghandler: Unable to register bmc device: -17
ipmi_si: Unable to register device: error -17
Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: 
 [<ffffffff80064b3d>] _spin_lock+0x0/0xa
PGD 809194067 PUD 80a6b5067 PMD 0 
Oops: 0002 [1] SMP 
last sysfs file: /devices/pci0000:00/0000:00:00.0/class
CPU 4 
Modules linked in: ipmi_si(U) ipmi_devintf(U) ipmi_msghandler(U) nfs fscache nfsd exportfs lockd nfs_acl auth_rpcgss openafs(PU) ipv6 xfrm_nalgo crypto_api autofs4 sunrpc bonding dm_multipath scsi_dh video hwmon backlight sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac parport_pc lp parport hpilo i5000_edac edac_mc shpchp bnx2 serio_raw pcspkr dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod qla2xxx scsi_transport_fc cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 4986, comm: insmod Tainted: P      2.6.18-128.el5 #1
RIP: 0010:[<ffffffff80064b3d>]  [<ffffffff80064b3d>] _spin_lock+0x0/0xa
RSP: 0018:ffff810808867c90  EFLAGS: 00010292
RAX: 0000000000000000 RBX: ffff810808ed0438 RCX: 00000000c0000100
RDX: ffff81081689be00 RSI: ffffffff8014942d RDI: 0000000000000000
RBP: ffff810808ed0410 R08: ffff810808866000 R09: 0000000000000000
R10: ffff810816967c00 R11: 0000000000000080 R12: 0000000000000000
R13: ffffffff80320c60 R14: 0000000000000000 R15: 0000000000000000
FS:  00002b4959910210(0000) GS:ffff81082ff79cc0(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000000809191000 CR4: 00000000000006e0
Process insmod (pid: 4986, threadinfo ffff810808866000, task ffff81080a638820)
Stack:  ffffffff8026f4ac 000000b1689f9008 ffff810808ed0400 ffff810808e19000
 ffffffff801b5146 ffff810808e19000 ffff810808ed0400 ffff81081689be00
 ffff810808e19000 ffff81081689bc00 ffffffff801b885f ffff81081689be34
Call Trace:
 [<ffffffff8026f4ac>] klist_del+0x15/0x2a
 [<ffffffff801b5146>] device_del+0x22/0x1a9
 [<ffffffff801b885f>] platform_device_unregister+0x9/0x12
 [<ffffffff88634784>] :ipmi_msghandler:cleanup_bmc_device+0xde/0xe9
 [<ffffffff886346a6>] :ipmi_msghandler:cleanup_bmc_device+0x0/0xe9
 [<ffffffff80034e87>] kref_put+0x6f/0x7a
 [<ffffffff88634697>] :ipmi_msghandler:ipmi_bmc_unregister+0x6a/0x79
 [<ffffffff88634e39>] :ipmi_msghandler:ipmi_unregister_smi+0xc/0xf4
 [<ffffffff8865257f>] :ipmi_si:try_smi_init+0x59e/0x685
 [<ffffffff88653533>] :ipmi_si:ipmi_pci_probe+0xa0/0x17f
 [<ffffffff8015504a>] pci_device_probe+0x104/0x184
 [<ffffffff801b6df8>] driver_probe_device+0x52/0xaa
 [<ffffffff801b6f27>] __driver_attach+0x65/0xb6
 [<ffffffff801b6ec2>] __driver_attach+0x0/0xb6
 [<ffffffff801b6741>] bus_for_each_dev+0x43/0x6e
 [<ffffffff801b6387>] bus_add_driver+0x7e/0x130
 [<ffffffff80155222>] __pci_register_driver+0x4b/0x6c
 [<ffffffff88653308>] :ipmi_si:init_ipmi_si+0x5c2/0x73f
 [<ffffffff800a3e5d>] sys_init_module+0xaf/0x1e8
 [<ffffffff8005d116>] system_call+0x7e/0x83


Code: f0 ff 0f 0f 88 6c 01 00 00 c3 f0 81 2f 00 00 00 01 74 05 e8 
RIP  [<ffffffff80064b3d>] _spin_lock+0x0/0xa
 RSP <ffff810808867c90>