Fixed seg fault in ntp
Fixed seg fault in ntp

NTP was not handling for malformed packets. This has been
fixed by checking the length of the packet

zmap/zmap,BobuSumisu/zmap,djeraseit/zmap,willscott/zmap,zhuyue1314/zmap,3L3N4/zmap,KeelanArrendale/zmap,shakenetwork/zmap,zhuyue1314/zmap,eacha/zmap,potatozhao/zmap,BobuSumisu/zmap,coolacid/zmap,unixfreaxjp/zmap,cicku/zmap,cicku/zmap,djeraseit/zmap,coolacid/zmap,djeraseit/zmap,zhuyue1314/zmap,coolacid/zmap,willscott/zmap,coolacid/zmap,eacha/zmap,3L3N4/zmap,scarito/zmap,willscott/zmap,3L3N4/zmap,3L3N4/zmap,KeelanArrendale/zmap,unixfreaxjp/zmap,shakenetwork/zmap,scarito/zmap,willscott/zmap,potatozhao/zmap,shakenetwork/zmap,coolacid/zmap,potatozhao/zmap,zmap/zmap,unixfreaxjp/zmap,unixfreaxjp/zmap,tdi/zmap,scarito/zmap,cicku/zmap,zmap/zmap,cicku/zmap,KeelanArrendale/zmap,scarito/zmap,tdi/zmap,3L3N4/zmap,eacha/zmap,cicku/zmap,unixfreaxjp/zmap,djeraseit/zmap,zhuyue1314/zmap,potatozhao/zmap,BobuSumisu/zmap,BobuSumisu/zmap,shakenetwork/zmap,eacha/zmap,shakenetwork/zmap,zhuyue1314/zmap,BobuSumisu/zmap,willscott/zmap,tdi/zmap,tdi/zmap,djeraseit/zmap,scarito/zmap,eacha/zmap,KeelanArrendale/zmap,tdi/zmap,potatozhao/zmap,KeelanArrendale/zmap