Need help in solving a crash when doing ping flood

[pnallimelli]

Hi,
   
    When i m doing ping flood , i m getting crash after 15 mins.
     The debug messages are like this:

     NU gdb 5.18 (FreeBSD)
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This GDB was configured as "i386-unknown-freebsd"...
IdlePTD at physical address 0x00579000
initial pcb at physical address 0x004a58a0
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x50a10800
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc1b177a9
stack pointer           = 0x10:0xcd6ccc64
frame pointer           = 0x10:0xcd6ccccc
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1088 (ping)
interrupt mask          = net tty
trap number             = 12
panic: page fault

syncing disks...
done
Uptime: 10m15s
dumping to dev #ad/0x20011, offset 1558871
#0  0xc023d9da in dumpsys ()
(kgdb) where
#0  0xc023d9da in dumpsys ()
#1  0xc023d7ab in boot ()
#2  0xc023dbd0 in poweroff_wait ()
#3  0xc03addfa in trap_fatal ()
#4  0xc03adacd in trap_pfault ()
#5  0xc03ad68b in trap ()
#6  0xc1b177a9 in ?? ()
#7  0xc0283006 in ether_output_frame (ifp=0xc1b1a840, m=0xc0c03900)
    at ../../net/if_var.h:290
#8  0xc0282d36 in ether_output (ifp=0xc1b1a840, m=0xc0c03900, 
dst=0xcd07ff00,
    rt0=0xc1b1ee00) at ../../net/if_ethersubr.c:370
#9  0xc029769d in ip_output (m0=0xc0c03900, opt=0x0, ro=0xcd07fefc, 
flags=32,
    imo=0x0, inp=0xcd07fec0) at ../../netinet/ip_output.c:1004
#10 0xc0298f3a in rip_output (m=0xc0c03900, so=0xcca53340, dst=34212362)
    at ../../netinet/raw_ip.c:299
#11 0xc02993e3 in rip_send (so=0xcca53340, flags=0, m=0xc0c03900,
    nam=0xc134a770, control=0x0, p=0xcc04b220) at ../../netinet/raw_ip.c:630
#12 0xc025cc6b in sosend ()
#13 0xc026022f in sendit ()
#14 0xc0260332 in sendto ()
#15 0xc03ae0a9 in syscall2 ()
#16 0xc039f0c5 in Xint0x80_syscall ()
#17 0x80492e1 in ?? ()

I feel my start() function is having problem.
Could anyone tell me the reason behind this??

Thanks,
pradeep