Kernel panic when executing skb_gro_reset_offset

Issue

• Server reboots every 6 days, vmcore shows the following call trace:

    general protection fault: 0000 [1] SMP 
    last sysfs file: /devices/pci0000:00/0000:00:03.0/0000:04:00.3/irq
    CPU 19 
    Modules linked in: autofs4 hidp rfcomm l2cap bluetooth lockd sunrpc ipv6 xfrm_nalgo crypto_api dm_mirror dm_multipath scsi_dh video hwmon backlight sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev sr_mod cdrom sg hpilo netxen_nic pcspkr serio_raw dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache ata_piix libata shpchp cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
    Pid: 0, comm: swapper Not tainted 2.6.18-164.el5 #1
    RIP: 0010:[<ffffffff8022714a>]  [<ffffffff8022714a>] skb_gro_reset_offset+0x35/0xa2
    RSP: 0018:ffff810243bffdb8  EFLAGS: 00010246
    RAX: ffff81013abd3010 RBX: ffff81013f8f16c0 RCX: 0000000000000008
    RDX: 0062002000440054 RSI: ffff8100687e3a18 RDI: ffff8100687e39c0
    RBP: ffffc20010087300 R08: 0000000000000000 R09: ffff81013abd3880
    R10: 0000000000000014 R11: 00000000ffff8101 R12: ffff8100687e39c0
    R13: ffff81013f8f1500 R14: 0000000000000000 R15: 0000000000000000
    FS:  0000000000000000(0000) GS:ffff810243bc0240(0000) knlGS:0000000000000000
    CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    CR2: 000000009d359ffc CR3: 000000043f53c000 CR4: 00000000000006e0
    Process swapper (pid: 0, threadinfo ffff81013fc88000, task ffff81043fc397e0)
    Stack:  ffffffff80228638 a920002100000000 ffff8100687e39c0 000000000000a920
     ffffffff881a6a23 0000000000000000 ffff810037f3bad0 0000000000000000
     ffff81013f8f1000 ffff81013f8f1a08 ffff810037f3bad0 ffff810037f30000
    Call Trace:
     <IRQ>  [<ffffffff80228638>] napi_gro_receive+0x15/0x2f
     [<ffffffff881a6a23>] :netxen_nic:netxen_process_rcv+0x2de/0x311
     [<ffffffff881a6b2b>] :netxen_nic:netxen_process_rcv_ring+0xd5/0x2fe
     [<ffffffff881a4966>] :netxen_nic:netxen_nic_poll+0x4a/0xf2
     [<ffffffff8000c845>] net_rx_action+0xac/0x1e0
     [<ffffffff8001235a>] __do_softirq+0x89/0x133
     [<ffffffff8005e2fc>] call_softirq+0x1c/0x28
     [<ffffffff8006cb14>] do_softirq+0x2c/0x85
     [<ffffffff8006c99c>] do_IRQ+0xec/0xf5
     [<ffffffff8019741b>] acpi_processor_idle+0x0/0x463
     [<ffffffff8005d615>] ret_from_intr+0x0/0xa
     <EOI>  [<ffffffff801973ac>] acpi_safe_halt+0x25/0x36
     [<ffffffff801975a2>] acpi_processor_idle+0x187/0x463
     [<ffffffff8019741b>] acpi_processor_idle+0x0/0x463
     [<ffffffff8019741b>] acpi_processor_idle+0x0/0x463
     [<ffffffff8004939e>] cpu_idle+0x95/0xb8
     [<ffffffff80076e23>] start_secondary+0x45a/0x469


    Code: 48 8b 0a 48 c1 e9 33 48 89 c8 48 c1 e8 09 48 8b 04 c5 80 5b 
    RIP  [<ffffffff8022714a>] skb_gro_reset_offset+0x35/0xa2
     RSP <ffff810243bffdb8>