kernel panic when iptables is restarted with "EIP is at nf_unregister_sockopt".

Issue

• Rhel4 kernel panic while doing iptables restart with "EIP is at nf_unregister_sockopt" .
• kernel panic with the below traces.

Unable to handle kernel paging request at virtual address f8c577e8
printing eip:
c02945ca
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: netconsole netdump ip_vs_rr ip_vs ip_tables parport_pc lp parport autofs4 i2c_dev i2c_core sunrpc cpufreq_powersave ib_srp ib_sdp ib_ipoib rdma_ucm rdma_cm iw_cm ib_addr ib_umad ib_ucm ib_uverbs ib_cm ib_sa ib_mad ib_core button battery ac md5 ipv6 joydev uhci_hcd ehci_hcd i5000_edac edac_mc e1000 tg3 dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod ata_piix libata mptscsih mptsas mptspi mptscsi mptbase sd_mod scsi_mod
CPU:    1
EIP:    0060:[<c02945ca>]    Not tainted VLI
EFLAGS: 00210216   (2.6.9-78.0.13.ELsmp)
EIP is at nf_unregister_sockopt+0x48/0x83
eax: 00000002   ebx: c035e6a4   ecx: f7089840   edx: f8c577e0
esi: f8bd85e0   edi: 00000000   ebp: ec315000   esp: ec315f5c
ds: 007b   es: 007b   ss: 0068
Process modprobe (pid: 24783, threadinfo=ec315000 task=f6c22770)
Stack: 00000000 c0337ba8 f8bd6865 f8bd8700 c01373e6 00000000 745f7069 656c6261
       f7260073 c0151ef2 f726fd04 ebc3cc7c c0152222 b7f8d000 b7f8e000 b7f8e000
       b7f8e000 ec319494 f726fcc0 f726fcf0 00000000 ec315000 09ccc890 00000000
Call Trace:
[<f8bd6865>] fini+0xd/0x35 [ip_tables]
[<c01373e6>] sys_delete_module+0x13b/0x184
[<c0151ef2>] unmap_vma_list+0xe/0x17
[<c0152222>] do_munmap+0x108/0x116
[<c02e0767>] syscall_call+0x7/0xb